37 results about "Methyl palmoxirate" patented technology

The invention discloses an extraction method of ginger essential oil. The method comprises the following steps: preparing ginger powder: slicing fresh ginger, soaking the sliced ginger in a 0.5-0.9wt% starch solution for 10-15min, drying and grinding the sliced ginger, and filtering obtained powder through a sieve of 60-80 meshes; preparing enzymatic hydrolysate: adding a de-ionized liquid 1-ethyl-3-methyl imidazole acetate ([Emim]OAc) to a disodium hydrogen phosphate-citrate buffer solution to obtain an ionic liquid system; adding the ginger powder to the ionic liquid system, controlling a material-to-liquid ratio at (1: 10)g/ml-(1: 20)g/mL, adding cellulase which is 2000-4000U/g in enzyme activity ratio and enzymatically hydrolyzing for 3-5h at 40-50 DEG C; and 3) essential oil extraction: and implementing enzyme deactivation to the system in a water bath after the reaction, ultrasonically extracting for 5-10min, conducting microwave treatment, filtering through gauze, centrifuging, standing and taking the de-ionized liquid on lower layer, spin-steaming, collecting oily matters having intense fragrance and drying the oily matters through anhydrous sodium sulfate to obtain the ginger essential oil.

The invention provides a preparation method of a corrosion inhibitor of methanol gasoline, and belongs to the technical field of metal corrosion protection. The preparation method comprises steps as follows: alpha-methylstyrene dimer, maleic anhydride, dicumyl peroxide and dimethylbenzene are added into a reactor, and then, the mixture is heated in an atmosphere of nitrogen for reacting; after the mixture is cooled to the room temperature, octadecanol, polyethylene glycol, p-toluenesulfonic acid, n-butyl alcohol and ethyl acetate are added, the mixture is heated for reacting and then cooled to the room temperature, and a mixture I is obtained; the mixture I is washed with a sulfuric acid aqueous solution, then washed with an NaOH aqueous solution and finally washed with an aqueous solution, and a mixture II is obtained; and benzotriazole, 2, 6-tert-butyl-4-methyl phenol, hexamethylene tetramine, ethanol, propargyl alcohol, trimellitate, a surface active agent and a combustion improver are added into the mixture II and uniformly stirred, and the corrosion inhibitor is obtained. The provided methanol gasoline has good solubility with various oils, the additive amount is small, and the corrosion-resistant effect is superior to that of a similar product.

The invention discloses non-toxic anti-crack putty.The non-toxic anti-crack putty mainly comprises, by weight, 18-24 parts of calcite powder, 35-45 parts of shell powder, 25-32 parts of perlite, 3-6 parts of hydroxypropyl methyl celluloses, 7-13 parts of starch ether, 6-10 parts of modified seaweed, 6-12 parts of calcium carbonate, 3-4 parts of ethylenediamine, 4-7 parts of formic acid, 18-23 parts of diatomaceous earth, 7-15 parts of latex powder, 6-9 parts of sodium silicate, 4-6 parts of rosin, 3-5 parts of methyl silicone oil and 22-26 parts of water.The non-toxic anti-crack putty has the advantages that good anti-crack effects can be realized by the non-toxic anti-crack putty, the non-toxic anti-crack putty is good in adhesion, water resistance and glossiness and high in strength and is non-toxic and odorless, processes for manufacturing the non-toxic anti-crack putty are simple and are convenient to implement and suitable for factory mass production, and the like.

The invention discloses a two-component organic silicon composition for mold top packaging and a preparation method thereof. The two-component organic silicon composition for mold top packaging comprises a component A and a component B. The component A comprises the following raw materials in parts by mass: 5-50 parts of vinyl silicone oil with a special structure, 0-45 parts of methyl vinyl MQ silicone resin and 0.05-0.5 part of a platinum catalyst. The component B is prepared from the following raw materials in parts by mass: 25 to 44 parts of methyl vinyl MQ silicon resin, 1 to 5 parts of atackifier, 4 to 18 parts of hydrogen-containing silicon resin and 0.005 to 0.05 part of an inhibitor. The two-component organic silicon composition provided by the invention has the characteristics of high strength, high hardness, high transmittance, high bonding strength, small thermal expansion coefficient, low moisture absorption, high temperature resistance, good aging resistance and the likeafter being completely cured, meanwhile, is high in curing speed, long in operation time, and good in mold release performance after mold top molding, and meets the related requirements of the packaging material for mold top packaging.

The invention relates to the field of building materials, and particularly discloses a shield grouting material and a preparation method thereof. The shield grouting material is prepared from the following raw materials in parts by weight: 80 to 120 parts of cement, 180 to 300 parts of fly ash, 200 to 350 parts of sand, 50 to 80 parts of bentonite, 2 to 4 parts of a thickening agent, 0.5 to 1.5 parts of an expanding agent and 0.5 to 3 parts of a water reducing agent, the thickening agent is prepared from silica fume, hydroxypropyl methyl cellulose and diallyl phthalate; the shield grouting material prepared by the invention has a relatively high condensation speed.

The invention belongs to the technical field of ozone detection, and provides a polyvinyl alcohol/methylene blue/nano-silver composite sensing film and a preparation method thereof. The preparation method comprises the following steps of soaking a substrate in an ethanol alkali solution to obtain a pretreated substrate; mixing a polyvinyl alcohol aqueous solution, a methylene blue ethanol solution and nano-silver hydrosol to obtain a polyvinyl alcohol/methylene blue/nano-silver mixed solution; and mixing the pretreated substrate, the polyvinyl alcohol/methylene blue/nano-silver mixed solution, a stabilizer and a cross-linking agent, and sequentially carrying out vacuum defoaming and vacuum drying treatment to obtain the polyvinyl alcohol/methylene blue/nano-silver composite sensing film. The polyvinyl alcohol/methylene blue/nano-silver composite sensing film is small in size, simple in structure, capable of reducing the system complexity of detection equipment and improving the detection efficiency and effect, low in single-time detection cost, convenient to detect, safe and non-toxic.

A label that permits rebridging of disulfide linkages in antibodies or proteins. The label has a general formula given by

wherein R₁ is methyl, ethyl or propyl and R₂ is a metal chelator, a fluorophore or a click-chemistry synthon.

The invention discloses a quinolizine aza-bis-aromatic ring axial chiral compound and a synthesis method of the quinolizine aza-bis-aromatic ring axial chiral compound. The method comprises the following steps: firstly obtaining an intermediate from raw materials substituted 1-naphthyne and methyl chloroformate under the action of lithium diisopropylamide, then generating a precursor from the intermediate and 2-methylpyridine under the action of lithium diisopropylamide, and finally reacting the precursor under the action of CuCl and a chiral phosphamide ligand to obtain the quinolizine aza-bis aromatic ring axial chiral compound. The method disclosed by the invention is mild in reaction condition and extremely high in yield and enantioselectivity, the quinolizine aza-bis-aromatic ring axial chiral compound taking quinolizine as a matrix is synthesized for the first time, and the range of the aza-axial chiral compound is greatly expanded.

The invention discloses an oil washing agent for carbon dioxide displacement as well as a preparation method and application thereof, and belongs to the field of carbon dioxide displacement oil extraction. The preparation method of the oil washing agent comprises the following steps: reacting a first monomer with formaldehyde in formic acid to obtain a first reactant; reacting the first reactant with borane, adding an oxidizing agent, and reacting under an alkaline condition to generate a second reactant; and reacting the aromatic hydrocarbon and a second monomer to obtain a third reactant, and reacting the second reactant and the third reactant under the heating condition to obtain the oil washing agent, wherein the first monomer is selected from at least one of 3-phenyl-4-pentene-1-amine, 4-pentene-1-amine, 4-methyl-pentene-1-amine and 2-amino-4-pentenoic acid; the second monomer is selected from at least one of succinic anhydride, 2,3-dimethyl succinic anhydride, glutaric anhydride and adipic anhydride; and the aromatic hydrocarbon is selected from at least one of benzene, methylbenzene and ethylbenzene.

The invention discloses silica gel pad printing conductive ink, which comprises the following components in parts by weight: 75-100 parts of cyclic methyl polysiloxane resin, 5-10 parts of silicon dioxide extinction powder, 5-10 parts of hydrogen-containing silicone oil, 0.5-10 parts of graphene oxide slurry, 10-25 parts of an organic solvent, 0.3-5 parts of a platinum catalyst and 1-20 parts of temperature change powder. The silica gel pad printing conductive ink is low in cost, waste finished products do not pollute the environment, and a large amount of silica gel pad printing conductive ink can be recycled to serve as building heat insulation filler.

The invention discloses a method for synthesizing a 1, 3-disubstituted planar chiral metallocene compound, and belongs to the field of organic synthesis. According to the method disclosed by the invention, simple N, N-alkyl amino methyl ferrocene/ruthenium and aryl iodide or aryl bromide are taken as initial raw materials and are stirred to react in an organic solvent at 80 DEG C under the action of a palladium catalyst, chiral amino acid, a norbornene derivative and alkali, so that the 1, 3-disubstituted planar chiral metallocene compound can be obtained. The method has the advantages of cheap and easily available raw materials, mild reaction conditions, good substrate universality, high yield and simple preparation process.

The invention relates to a catalyst and a method for preparing p-methyl benzaldehyde from synthesis gas and toluene. The catalyst and the method for preparing p-methyl benzaldehyde from synthesis gasand toluene are characterized in that: a copper-zirconium bimetallic catalyst is used as a main catalyst, and an H-ZMS-5 molecular sieve or an H-ZMS-11 molecular sieve is used as a carrier. The raw material cost is low, one-step preparation method is adopted, the process route is simple and efficient, and the economic advantages are obvious. Cheap synthesis gas is used as the raw material to reactwith toluene, the coupling reaction of an active intermediate for preparing methoxyaldehyde from the synthesis gas and toluene is realized in a gas-phase high-selectivity manner by adopting a fixed bed reactor under the action of the catalyst, and the preparation of high-selectivity p-methyl benzaldehyde is realized in a catalyst pore passage.

The invention relates to a preparation method of a catalyst for preparing methylacrolein through isobutene oxidation. The preparation method comprises the following steps: roasting a carbon-nitrogen ligand to prepare a carbon-nitrogen material precursor, and fully mixing precursors of molybdenum, bismuth, cobalt, nickel, iron and alkaline metal with a mesoporous carbon-nitrogen material precursor and a template agent; and finally roasting to obtain the catalyst with molybdenum, bismuth, cobalt, nickel, iron and alkaline metal loaded on the mesoporous carbon nitrogen material skeleton, and the catalyst has high activity and product selectivity, and has good industrial application value.

The invention provides a preparation method of rocuronium bromide. The preparation method comprises the following steps: step 1, reacting a raw material compound I with acetyl chloride to obtain a compound II; 2, dropwise adding a hydrochloric acid solution into the compound II obtained in the step 1 to carry out a hydrolysis reaction, performing standing for layering, removing part of an organiclayer, adjusting the pH value of the residual reaction solution to 7-9 by using a sodium carbonate aqueous solution, separating out an organic phase, and treating to obtain a compound III; 3, adding dichloromethane, anhydrous magnesium sulfate and alkaline aluminum oxide into the compound III and allyl bromide, carrying out a quaternization reaction under the nitrogen flow, filtering under the protection of nitrogen after the reaction is completed, concentrating a filtrate to obtain a concentrate, pulping the concentrate by using a dichloromethane-methyl tert-butyl ether-ethyl acetate system,separating out solids, and carrying out freeze drying to obtain a rocuronium bromide pure product. The purity of the prepared bulk drug product is greater than or equal to 99.8% (according to a USP40correction result), the maximum impurity content is less than or equal to 0.1% (according to the USP40 correction result), and the solvent residue sum is less than or equal to 0.5%.

The invention relates to a synthesis method of 2-chloro-1-(2, 2-dimethyl-4H-benzo [1, 3] dioxin-6-yl) ethanone, the method comprises the following steps: (1) carrying out hydroxymethylation on methyl 4-hydroxybenzoate to obtain methyl 4-hydroxy-3-(hydroxymethyl) benzoate; (2) carrying out acetonylidene protection on ortho-dihydroxyl of the 4-hydroxy-3-(hydroxymethyl) methyl benzoate, so as to obtain 2, 2-dimethyl-4H-benzo [d] [1, 3] dioxin-6-carboxylic acid methyl ester; and (3) carrying out chloromethylation on the 2, 2-dimethyl-4H-benzo [d] [1, 3] dioxin-6-carboxylic acid methyl ester, so as to obtain the 2-chloro-1-(2, 2-dimethyl-4H-benzo [d] [1, 3] dioxin-6-yl) ethanone. The synthesis route does not involve a Friedel-Crafts acylation reaction, liquid bromine does not need to be used, the initial raw materials belong to bulk chemicals, the synthesis route is short, the synthesis route is safer and more environmentally friendly, and mass production of the 2-chloro-1-(2, 2-dimethyl-4H-benzo [1, 3] dioxin-6-yl) ethanone is easy to achieve.

The invention relates to an efficient leather brightening and maintaining agent. The brightening and maintaining agent is prepared from the following raw materials in parts by weight: 9-17 parts of edible vegetable oil, 4-9 parts of triethanolamine, 5-9 parts of stearic acid, 7-12 parts of isopropyl palmitate, 4-7 parts of span-60, 2-8 parts of paraffine, 6-10 parts of fish oil acidamide, 5-7 parts of carboxymethyl cellulose sodium, 5-8 parts of olive oil macrogol ester, 4-9 parts of propylparaben, 1-5 parts of dimethyl benzyl ammonium chloride, 1-3 parts of a mildewproof agent and 6-9 parts of 50-80-mesh talcum powder. The efficient leather brightening and maintaining agent disclosed by the invention has the benefits that the brightness of leather can be effectively improved, and a layer of protective film is formed on the surface of the leather, so that the time of the re-oxidation aging of the leather can be delayed, and the service life of the leather can be prolonged.

The invention relates to the technical field of preparation of polyvinyl chloride by a suspension method and provides a weather-resistant modified solution and colored weather-resistant polyvinyl chloride resin as well as preparation methods thereof. The weather-resistant modified solution comprises the following raw materials: sodium dodecyl benzene sulfonate, hydroxypropyl methyl cellulose, nano-titanium dioxide, hindered amine light stabilizers and water. The colored weather-resistant polyvinyl chloride resin comprises the following raw materials: water, a vinyl chloride monomer, polyvinyl alcohol, hydroxypropyl methyl cellulose, an organic dye, the weather-resistant modified solution, a pH regulator, an initiator and a terminator. The method for preparing the colored weather-resistant polyvinyl chloride resin is characterized by adding the organic dye to the raw materials for preparing polyvinyl chloride resin, which belongs to chemical modification, colored weather-resistant polyvinyl chloride obtained by the method has better color stability and durability, better strength and more stable properties, and the method is simple to operate and has stronger feasibility.

The invention discloses a preparation method of ozagrel sodium key intermediate (E)-4-(imidazolyl methyl) cinnamate, and belongs to the field of chemical pharmacy. The method comprises the following steps of: adding imidazole, alkali and a solvent into a reaction flask, stirring to uniformly mix the imidazole, alkali and solvent, and cooling an obtained solution ; and adding the solution of 4-bromomethyl cinnamate into the solution of imidazole and alkali, controlling the temperature to perform a reaction until the reaction is finished, adding acid to quench the reaction, adding water to crystallize, performing filtering, washing and drying to obtain the (E)-4-(imidazolyl methyl) cinnamate product. The method can greatly reduce the generation of byproducts, and improves the purity and conversion rate of the reaction.

The invention discloses a preparation method of 4, 4 ', 5, 5'-tetramethyl [1, 1 '-biphenyl]-2, 2'-diamine, which comprises the following steps: carrying out amino protection, nitration substitution, deprotection, diazotization iodination, catalytic coupling, iron powder catalytic reduction, extraction and concentration on a raw material 3, 4-dimethylaniline to obtain the 4, 4 ', 5, 5'-tetramethyl [1, 1 '-biphenyl]-2, 2'-diamine. According to the present invention, with the method, the high 4, 4 ', 5, 5'-tetramethyl [1, 1 '-biphenyl]-2, 2'-diamine yield can be obtained, and the price of the used catalyst is low.