29 results about "Aldehyde" patented technology

The invention relates to the use of a composition as an agent for blowing a projected biocomponent polyurethane foam, said composition including 1-chloro-3,3,3-trifluoropropane and/or 2-chloro-3,3,3-trifluoropropene and at least one additional compound selected from among hydrochlorofluoroolefins, hydrofluoroolefins, hydrochloroolefins, hydrofluorocarbons, hydrochlorofluorocarbons, hydrocarbons, substituted or non-substituted ethers, substituted or non-substituted alcohols, substituted or non-substituted aldehydes, substituted or non-substituted ketones and substituted or non-substituted esters. Said composition has a boiling point greater than or equal to 20° C. The invention also relates to a method for manufacturing polyurethane foam on the basis of the use above and moreover relates to specific compositions that are appropriate for implementing the invention.

The invention relates to a preparation method and application of a porous biomass acidic solid material. The preparation method is characterized by comprising the following steps: adding a lignosulfonate water solution having a certain concentration, an aldehyde compound, a template agent and a catalyst into a reaction vessel according to a certain ratio, uniformly mixing, and reacting at 50-220 DEG C for 2-120 hours; drying, grinding, removing the template, performing acid treatment, and washing to neutral; and drying to obtain the material. The porous material structurally contains multiple surface acidic groups such as sulfonic groups, carboxyl groups and hydroxyl groups, has a high surface distribution density and is a favorable porous acidic solid material. The material is used for esterification reaction, and the esterification yield is up to 85% or above. The material provided by the invention has the advantages of abundant raw material sources, controllable structure, simple preparation process and the like.

The invention belongs to the field of protein analysis, and relates to a new method for enrichment of a glycosylated peptide through a magnetic nanometer material modified by aminoxy, in particular to a method for solid-phase enrichment and mass spectrographic analysis of a glycosylated peptide fragment. The method comprises the following steps: firstly, using sodium periodate NaIO4 to oxidize a hydroxyl group on a glycopeptide to change the hydroxyl group to an aldehyde group; secondly, placing the magnetic nanometer material Fe3O4@ONH2 modified by aminoxy to an oxidized glycopeptide solution, and fixing the glycopeptide to the magnetic nanometer material through reaction of an aminoxy group and the aldehyde group obtained after a sugar chain in the glycopeptides is oxidized; thirdly, cleaning to remove non-glycopeptide which does not react with the nanometer material; finally, dissociating the captured glycopeptide from the material by use of sugar chain enzyme, and realizing mass spectrographic analysis of the glycosylated peptide. The method is simple in step, convenient to operate, high in speed and efficient, and can realize highly-sensitive and highly-selective mass spectrometric analysis of the glycosylated peptide.

A process for preparing an amine by reacting a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group of ammonia and primary and secondary amines, in the presence of a supported copper-, nickel- and cobalt-containing catalyst, wherein the catalytically active material of the catalyst, before the reduction thereof with hydrogen, comprises oxygen compounds of aluminum, of copper, of nickel, of cobalt and of tin, and in the range from 0.2 to 5.0% by weight of oxygen compounds of yttrium, of lanthanum, of cerium and/or of hafnium, each calculated as Y₂O₃, La₂O₃, Ce₂O₃ and Hf₂O₃ respectively, and catalysts as defined above.

The present invention discloses a red bayberry brandy preparation method, which comprises: (1) juicing the sorted and washed red bayberry fruits; (2) adopting 0.5% edible gelatin to prepare a 10% gelatin solution, slowly adding to the red bayberry juice under complete stirring, and carrying out pasteurization; (3) inoculating (calculated as the weight of the red bayberry juice) 0.1-0.5% of activated grape wine active dry yeast and 0.05-0.15% of activated aroma-producing yeast into the red bayberry juice, carrying out sealing fermentation at a temperature of 22-26 DEG C for 7 days, and uniformly stirring; (4) distilling, wherein crude distillation is directly performed, the end liquor is cut when the alcohol content of the obtained solution is 1.5-2.5% to obtain the crude distillation red bayberry wine having the alcohol content of 26-29%, the head liquor of the obtained red bayberry wine is cut, distillation is slowly performed, and the end liquor is cut until the concentration of the distilled wine decreases to 38-44 DEG; and (5) storing, blending, filtering, and loading the wine. The red bayberry brandy preparation method is characterized in that the two distillation method is adopted, aldehydes, esters, higher alcohols and other aroma components are collected, and the red bayberry brandy processed by using the method has characteristics of clear and transparent solution, rich loquat aroma, coordinated wine aroma, unique flavor, refreshing and pleasant property.

The invention discloses a bifunctional adsorbent of N-TiO2 silkworm-excrement porous carbon and a preparation method of the bifunctional adsorbent of the N-TiO2 silkworm-excrement porous carbon. The preparation method comprises the following steps: (1) firstly mixing and putting silkworm excrement and ZnCl2 in a high-temperature tube furnace, introducing a protective gas to purge, then heating to 300 to 700 DEG C to obtain silkworm-excrement porous carbon (SPC) through reaction; (2) adding butyl titanate to a selective alcohol solvent, drop by drop adding to an aqueous suspension containing the silkworm-excrement porous carbon, enabling the butyl titanate hydrolyzed to generate amorphous TiO2, thus obtaining an A-TiO2/silkworm-excrement porous carbon material; (3) carrying out surface modification on the material through a plasma radiation way to obtain an N doped A-TiO2 silkworm-excrement porous carbon material; (4) calcining the material at the temperature of 180 to 500 DEG C, finally obtaining an N-TiO2/SPC bifunctional adsorption material. The bifunctional adsorption material disclosed by the invention is applied to synchronous adsorption and catalytic degradation of VOCs of aldehydes and benzene series.

The invention discloses a camellia oleifera abel shell compound corrosion inhibitor and a preparation method and application thereof. The camellia oleifera abel shell compound corrosion inhibitor comprises 0.1-1.0 g/L of camellia oleifera abel shell extract, 0.05-0.5 g/L of aromatic aldehyde compound, 0.1-0.5 g/L of anionic surfactant, 0.01-0.1 g/L of polyvinylpyrrolidone and the balance picklingsolution. The preparation method comprises the following steps: mixing and uniformly stirring raw materials with the formula ratio to obtain the target camellia oleifera abel shell compound corrosioninhibitor. The camellia oleifera abel shell compound corrosion inhibitor is applied in acid pickling of iron and steel materials.

The invention discloses a plant-origin reagent with a formaldehyde removing function and a preparation method thereof, and relates to the field of indoor waste gas treatment. The reagent comprises byweight, 5-15 parts of a plant-origin formaldehyde absorbing agent, 30-70 parts of a plant-origin formaldehyde reaction agent, 6-18 parts of a crosslinking agent and 20-35 parts of water, wherein the plant-origin formaldehyde reaction agent comprises Arbutin ethanol extracts, centella ethanol extracts, milk thistle ethanol extracts, fructus cnidii ethanol extracts, golden buckwheat rhizome ethanolextracts, grape ethanol extracts, tea leaf ethanol extracts and amino acid. The reagent has the advantages that the reagent is harmless to a human body and can effectively removing the formaldehyde.

The invention discloses cell membrane-simulated surface-modified bacterial cellulose and a preparation method and application thereof. The method comprises the following steps: oxidizing bacterial cellulose with a periodate to obtain aldehyde-based bacterial cellulose; and reacting the aldehyde-based bacterial cellulose with a disubstituted choline phosphonate, adding a reaction product into an alkaline solution for hydrolysis, and performing washing with water and drying to obtain the cell membrane-simulated surface-modified bacterial cellulose. The phosphorylcholine-based bacterial celluloseprepared by the invention is non-toxic to cells under physiological environment, and has good anti-protein adhesion and anti-cell adhesion. The preparation method has mild conditions, is easy to operate, can obtain a cell membrane-simulated modified bacterial cellulose material with anti-bio adhesion on the surface, and is suitable for preparing anti-bio adhesion and adhesion-proof biomaterials.

The invention provides formaldehyde detection test paper, a preparation method thereof and a formaldehyde detection system. The formaldehyde detection test paper comprises a hydrophilic layer prepared from an air-permeable hydrophilic material and a hydrophobic layer formed by inorganic particles attached to one side of the hydrophilic layer, at least the hydrophobic layer contains a formaldehyde developing reagent; the formaldehyde detection system comprises a formaldehyde detection module and formaldehyde detection test paper, wherein the formaldehyde detection test paper is detachably mounted in a detection cavity of the formaldehyde detection module. The inorganic particles are attached to the surface of one side of the hydrophilic layer prepared from the breathable hydrophilic material to form the hydrophobic layer containing the formaldehyde color developing reagent, and the formaldehyde color developing reagent develops color in the hydrophobic layer to detect the concentration of formaldehyde, moisture in the hydrophobic layer can enter the hydrophilic layer under the action of the hydrophilic layer, thus moisture influencing the formaldehyde detection accuracy in the hydrophobic layer is avoided, and the influence of humidity on formaldehyde detection is avoided.

Alcohol intoxication causes serious diseases, whereas current treatments are mostly supportive and unable to remove alcohol efficiently. Upon alcohol consumption, alcohol is sequentially oxidized to acetaldehyde and acetate by the endogenous alcohol dehydrogenase and aldehyde dehydrogenase, respectively. We disclose a hepatocyte-mimicking antidote for alcohol intoxication through the co-delivery of the nanocapsules of alcohol oxidase (AOx), catalase (CAT), and aldehyde dehydrogenase (ALDH) to the liver, where AOx and CAT catalyze the oxidation of alcohol to acetaldehyde, while ALDH catalyzes the oxidation of acetaldehyde to acetate. Administered to alcohol-intoxicated mice, the antidote rapidly accumulates in the liver and enables a significant reduction of the blood alcohol concentration. Moreover, blood acetaldehyde concentration is maintained at an extremely low level, significantly contributing to liver protection. Such an antidote, which can eliminate alcohol and acetaldehyde simultaneously, holds great promise for the treatment of alcohol intoxication and poisoning.

The invention discloses a feed additive enteric-coated sustained-release pellet with a function of preventing and treating poultry respiratory syndromes and a preparation method for the feed additive enteric-coated sustained-release pellet. The enteric-coated sustained-release pellet is prepared from the following raw materials: water-soluble vitamin A, water-soluble vitamin D, water-soluble vitamin E, thymol, cinnamyl aldehyde, menthol, eucalyptus oil, maltodextrin, sodium carboxymethylcellulose, lactose and a coating solution which is a Eudragit enteric-coated coating solution with a model of Eudragit L30D-55, wherein the coating solution is water suspension with mass concentration of 5%-8%. The feed additive enteric-coated sustained-release pellet with the function of preventing and treating poultry respiratory syndromes disclosed by the invention has a treatment effect on sick chicken with respiratory syndromes due to artificial infection of chicken infectious bronchitis virus (M41 strain), can effectively improve the respiratory tract function, is small in dosage, quick in effect-taking, and has the effects of promoting growth and increasing a feed conversion rate.

The invention relates to a rapid-sterilizing tableware disinfectant. The rapid-sterilizing tableware disinfectant is prepared from the following raw materials in parts by weight: 6-14 parts of quaternary ammonium salt of chitosan, 7-11 parts of alkyl dimethyl benzyl ammonium chloride, 6-10 parts of nonylphenol polyoxyethylene ether sodium sulfate, 3-5 parts of cordate houttuynia, 1-5 parts of lonicera japonica, 4-9 parts of lavandula angustifolia, 3-8 parts of myristic aldehyde, 3-6 parts of herba schizonepetae, 1-5 parts of magnolia bark, 5-9 parts of four kings, 2-8 parts of honeysuckle flowers, 2.5-6 parts of sorbitol, 7-9 parts of hypericum perforatum, 7-11 parts of greasy hypericum monogynum extract, 1-3 parts of sodium sulfate and 6-11 parts of fruit of negundo chastetree fruits. The rapid-sterilizing tableware disinfectant has the beneficial effects that a variety of traditional Chinese medicine ingredients are added, so that the tableware disinfectant disclosed by the invention is environment-friendly and is high in sterilizing speed; and meanwhile, the tableware disinfectant is easy to clean and is free of residue.

The invention relates to a preparation method of hydroxyl polyurethane (PHU). An isocyanate route for synthesizing traditional polyurethane (PU) is adopted in the method to synthesize PHU for the first time, and the preparation of linear PHU is divided into two steps, namely prepolymerization and chain extension. The preparation method comprises the following steps: firstly, reacting excessive diisocyanate monomers with macromolecular diol to obtain an isocyanate-terminated prepolymer; then adding a ketal (aldehyde) protected diol chain extender for a reaction with the prepolymer to obtain PU-ketal (aldehyde); and finally, hydrolyzing a ketal (aldehyde) protecting group in a PU-ketal (aldehyde) structure into a hydroxyl group under an acidic condition to obtain PHU. The preparation of cross-linked PHU comprises the following steps: subjecting the linear PHU to reacting with a diisocyanate monomer, and controlling a ratio of the PHU to the diisocyanate monomer to allow a part of hydroxyl groups to be still reserved on a PHU main chain, thereby obtaining the cross-linked PHU. Compared with the prior art, the method has the advantages of simple operation, easily available raw materials, low economic cost and high product yield, and is suitable for large-scale industrial production.

The invention relates to the technical field of bamboo laminated wood and especially relates to a preparation method for outdoor phenolic resin glue used for bamboo laminated wood. The preparation method comprises the following steps: preparing raw materials: phenol monomer, aldehyde monomer, base catalyst, dispersing agent, modifying agent and water; blending base catalyst with a part of water, for preparing alkali liquor and standing by; adding the alkali liquor into the mixture of phenol monomer, aldehyde monomer, dispersing agent, modifying agent and residual water in batches and naturallyreacting; cooling, thereby acquiring phenolic resin glue. The preparation method is energy-saving and environment-friendly. The prepared phenolic resin glue can be applied to outdoor phenolic resin glue and has excellent performances.

The invention belongs to the technical field of photocatalytic reduction synthesis. The invention particularly relates to a method for regulating and controlling the photocatalytic reduction reactionselectivity of unsaturated aldehyde ketone by utilizing a solvent. The method comprises the following steps: adding a photocatalyst, unsaturated aldehyde ketone and a solvent into a reaction container, irradiating the reaction container with a light source under an anaerobic condition to react, and adjusting the proportion and/or type of alcohol in the reaction solvent to obtain reduction productswith different selectivity. The method is simple to operate, good in selectivity and high in yield, wherein the highest selectivity can reach 100% and the highest yield can reach 100%.

The invention relates to a method for improving the yield and selectivity of cinnamyl alcohol generated by catalytic hydrogenation of alpha, beta-unsaturated aldehyde, especially cinnamyl aldehyde. The obtained PtCoS alloy nanoparticles with cubic morphology are used as a hydrogenation catalyst, good cinnamyl aldehyde selective hydrogenation performance is shown, compared with a traditional liquid-phase catalyst, separation and recycling are facilitated, the vulcanization passivation step before the reaction can be effectively avoided, the method has wide application prospects, chloroplatinicacid, cobalt chloride and sodium sulfite are used as raw materials, in the precursor reduction process of PVP, metal and nonmetal composite alloy can be promoted to form cubic alloy through the synergistic effect of glycine and sulfite for the first time, energy consumption is reduced, and the preparation method is environmentally friendly and clean.

The invention provides a purifying agent for a compound containing aldehyde impurities and application of the purifying agent. The purifying agent comprises borohydride of alkali metal and hydrazine hydrate, wherein the molar percentage of the borohydride of alkali metal is 2-20%, and the molar percentage of the hydrazine hydrate is 80-98%. When the purifying agent is added in the rectification and purification process of crude epoxypropane or crude isopentenyl alcohol containing 50-1000 ppm of aldehyde impurities, the content of the aldehyde impurities can be reduced to 20 ppm or below. The problems that in the prior art, the removal efficiency of impurity aldehydes in the crude epoxypropane or crude isopentenyl alcohol is low, and the purity of the obtained product is limited are solved. The purifying agent provided by the invention is high in impurity removal efficiency and convenient to apply.

The invention discloses a preparation method of a Schiff base sensitized graphene composite titanium dioxide photocatalyst. Nano TiO2 and nano graphene oxide are modified through a silane coupling agent, then a Schiff base is formed through terephthalaldehyde and amino, and TiO2 and graphene oxide are linked through the Schiff base group to realize chemical bond linking of the graphene, a dye and the TiO2 to obtain the Schiff base sensitized graphene composite titanium dioxide photocatalyst. The photocatalyst synthesized by the invention is sprayed into a closed space of a glass box with a certain volume, a certain amount of formaldehyde aqueous solution is added to volatilize the photocatalyst, then the photocatalyst is irradiated under a fluorescent lamp for 48 hours, and then the concentration of formaldehyde is tested. Experiments prove that the removal effect of the synthesized photocatalyst on gaseous formaldehyde is obviously improved, and the removal efficiency on formaldehyde within 48 hours is 89%.

The invention discloses a polyvinyl alcohol aldehyde acetal group solid lubricant and a preparation method thereof. The polyvinyl alcohol aldehyde acetal group solid lubricant is prepared from the following raw materials by mass percent: 22 to 50% of polyvinyl alcohol aldehyde acetal group resin, 40 to 60% of lubricant, 8 to 15% of friction modifier and 1 to 3% of releasing agent. The polyvinyl alcohol aldehyde acetal group solid lubricant disclosed by the invention can effectively reduce friction abrasion among friction pairs of wheel tracks, building machinery and mining machinery, reduce noise and improve work safety; furthermore, the preparation method disclosed by the invention has the advantages of simpleness, convenience in use and suitability for being popularized and applied.

The present invention relates to an antimicrobial composition [composition (C), hereinafter] wherein the composition (C) comprises: from 60.00% to 94.45% (wt%) by weight of at least one monocarboxylic acid having 1 to 5 carbon atoms or a salt thereof or a mixture thereof; 5.00%-25.00% (wt%) by weight of at least one medium chain fatty acid comprising 6-12 carbon atoms or a derivative thereof, 0.05%-2.50% (wt%) by weight of at least one monoterpene; wherein composition (C) is substantially free of aliphatic aldehydes having from 1 to 12 carbon atoms, and wherein all wt% are relative to the total weight of composition (C).

The invention relates to the field of preparation of fluorine-containing monomers, and particularly discloses a preparation method of hexafluorodianhydride. The preparation method comprises the following steps: S1, preparation of hexafluorotetracid according to the following reaction process flow: step (1), with o-dichlorobenzyl and hexafluoroacetone used as raw materials, adding a catalyst, and performing stirring reflux at 130-150 DEG C for 20-40 h to obtain a product a; step (2), hydrolyzing the product a into a product b under an alkaline condition; step (3), oxidizing a hydroxyl group into an aldehyde group to obtain a product c; and step (4), oxidizing the aldehyde group into a carboxyl group to obtain hexafluorotetracid; and S2, preparation of hexafluorodianhydride according to the reaction process flow that hexafluorotetracid is dehydrated and anhydridized to prepare hexafluorodianhydride. Compared with the prior art, the preparation method provided by the invention has the advantages that reaction conditions in the whole process are mild, the use of a potassium permanganate strong oxidant is avoided in a route, requirements on a reaction container are lower, and reaction safety is higher.

The invention discloses a high-activity hyaluronic acid-polypeptide conjugate as well as a preparation method and application thereof. The preparation method of the high-activity hyaluronic acid-polypeptide conjugate comprises the following steps: preparing aldehyde modified hyaluronic acid; the preparation method comprises the following steps: dissolving aldehyde modified hyaluronic acid in a buffer solution, adding auxin and sodium cyanoborohydride, and reacting; ethyl carbazate is added for a reaction; finally, the hyaluronic acid-polypeptide conjugate is obtained. According to the technical scheme, the auxin can be perfectly connected to the hyaluronic acid, and the binding rate is about 70%; the secondary structure of the auxin in the hyaluronic acid-polypeptide conjugate disclosed by the invention is not changed; and in a skin tissue test, the hyaluronic acid-polypeptide conjugate can be effectively transferred to a corium layer.

The invention provides a ceramic deflocculating agent and a preparation method thereof. The preparation method is realized through the following steps: (1) adding tea saponin, inorganic alkali, an acrylamide monomer and water into a reaction tank; starting, stirring and raising the temperature; after the temperature is raised to 80 DEG C to 150 DEG C, adding aliphatic aldehyde and reacting for 1 to 3h; (2) then adding diethyl iminodiacetate and 2,2'-diallylbisphenol A; after stirring for 0.5 to 2h, adding an initiator and continually reacting for 1 to 3h; (3) cooling and discharging to obtainthe ceramic deflocculating agent.

The invention discloses an internal circulation type micro purifier for removing formaldehyde. The internal circulation type micro purifier includes a heat insulation shell, two exhaust ports and twoair inlets are symmetrically formed in the side wall of the heat insulation shell; a storage battery and a protective cover are fixedly mounted in the heat insulation shell; a heating tube electrically connected with the storage battery is arranged in the protective cover; a protective box is supported above the protective cover; an ultraviolet lamp tube electrically connected with the storage battery is mounted in the protective box; a fixing plate is arranged in the middle of the protective box, adsorption pieces are symmetrically hinged to the two sides of the fixing plate, the end, away from the fixing plate, of each adsorption piece is in interference fit with a connecting plate, and thermal deformation pieces are fixedly arranged between the two connecting plates and the inner side wall of the heat insulation shell. Formaldehyde is enriched in the adsorption pieces through periodic exchange of gas inside and outside the heat insulation shell, meanwhile, the enriched formaldehydeis decomposed through a photocatalysis layer and the ultraviolet lamp tube, and the effect of efficiently and continuously removing formaldehyde is achieved.