69 results about "Sodium hydroxide" patented technology

The invention relates to a preparation method for a super-hydrophobic/super-oleophylic loofah sponge fiber and an application thereof. The method comprises the following steps: pretreating loofah sponge fiber with sodium hydroxide and hydrogen peroxide and standing by; taking a certain amount of polyurethane adhesive and gas-phase nano-silica and adding into an acetone solvent; ultrasonically dispersing for 2-4 hours, thereby acquiring an acetone dispersion liquid; adding the pretreated loofah sponge fiber into the acetone dispersion liquid and ultrasonically dispersing for 2-10 hours; and drying in an oven, thereby acquiring the super-hydrophobic/super-oleophylic loofah sponge fiber used for effectively separating oil or organic solvent from water mixture. The preparation method provided by the invention is simple and quick; the used raw materials are economical, easily acquired and easy to degrade; the virulent fluorine-containing surfactant is not required; the prepared super-hydrophobic/super-oleophylic loofah sponge fiber has higher stability, excellent super-hydrophobic property and efficient oil water separation capacity; and besides, the prepared super-hydrophobic/super-oleophylic loofah sponge fiber has excellent strong acid resistance, strong base resistance, high salinity resistance, high temperature resistance and extensive social benefit and economic benefit.

The invention discloses a phosphor-doped CHA molecular sieve, and a preparation method and application thereof, and belongs to the field of zeolite molecular sieve preparation technology and application. The preparation method is characterized by comprising the following steps: mixing a silicon source, an aluminum source, sodium hydroxide, potassium hydroxide, SAPO-18, AlPO-18 or SAPO-34 seed crystal and distilled water to form uniform gel; performing hydrothermal crystallization, performing washing and drying after performing solid-liquid separation on a crystallized product, thereby obtaining the phosphor-doped CHA molecular sieve which can perform ammonia gas selective catalytic reduction denitration catalysis after being loaded with Cu<2+>. Addition of seed crystal such as SAPO-18 is akey factor for generating the phosphor-doped CHA molecular sieve. The method can be used for preparing the phosphor-doped CHA molecular sieve with high degree of crystallinity under a conventional hydro-thermal synthesis condition, so that ammonia gas selective catalytic reduction denitration (NH3-SCR) low-temperature activity is good.

The process of preparing high water solubility polyvinyl alcohol features that vinyl acetate monomer in 50-80 weight portions, methanol in 16-49 weight portions, vinyl monomer containing carboxyl group or amido group in 1-4 and initiator in 0.04-0.08 weight portion are reacted in a reactor equipped with thermometer, stirrer, reflux condensator and water bath at 60-65 deg.c for 3-6 hr; and the resultant is compounded with methanol into 30 % concentration solution and alcoholyzed with sodium hydroxide or potassium hydroxide to obtain high water solubility polyvinyl alcohol.

The invention discloses a double-alkali neutralization treatment method of heavy metal-containing acidic wastewater. According to the double-alkali neutralization treatment method, sodium hydroxide is mainly used for adjusting a pH value so that metal ions in acidic wastewater form precipitates, the precipitates are recovered, the recovered metal sludge is treated and then can be used as metal oxides for next use, through lime use, fluorine ions in the wastewater form precipitates, and the precipitates do not contain heavy metals and can be treated by a common sludge treatment method. The sludge treated by the double-alkali neutralization treatment method is not used as dangerous waste or can be used as a fluorite-like accessory material, and the rest of the wastewater satisfies discharge standards by slight treatment.

The invention discloses a method for preparing rod-like magnesium hydroxide from salt lake brine. The method comprises the following steps of: concentrating and crystallizing salt lake brine, from which elements such as potassium and lithium are extracted, serving as a raw material to obtain bischofite; dissolving the bischofite separated by crystallization into water to prepare magnesium chloride solution; introducing ammonia gas to perform magnesium precipitation reaction; when the pH value reaches 7-8, stopping introducing the ammonia gas, reacting at the temperature of 30-50 DEG C for 0.5-2 hours, aging and filtering to obtain alkaline magnesium chloride and magnesium precipitation mother liquor; dispersing the alkaline magnesium chloride in mixed solution of ethanol and water to obtain alkaline magnesium chloride suspension; adding sodium hydroxide to further precipitate to obtain rod-like magnesium hydroxide; filtering and separating to obtain magnesium precipitation mother liquor; replenishing the bischofite and circulating for precipitating the alkaline magnesium chloride; feeding to an ammonia still process along with concentration enrichment of magnesium precipitation mother liquor in ammonia chloride; performing ammonia still with lime; and circulating the produced ammonia gas to precipitate the alkaline magnesium chloride of a next batch and producing byproduct calcium chloride, wherein the magnesium content in the brine is not less than 93.4 g/L. The method has the advantages of high product purity, good economic benefit, no environmental pollution, high operability and easiness for industrial production.

The present invention provides a method for preparing a mordenite, which is a method for preparing the mordenite through a hydrothermal crystallization by using natural aluminosilicate minerals as total silicon sources and total aluminum sources, comprising the steps of: subjecting the natural aluminosilicate minerals to activation treatment which is an activation by sub-molten salt and an activation by thermal treatment; selecting and mixing the activated natural aluminosilicate minerals according to the silicon-to-aluminum ratio of the targeted mordenite, adding thereto deionized water, sodium hydroxide, crystal seed, a templating agent to obtain a reaction mixture; adjusting the reaction mixture by using an inorganic acid to have a pH of 10-13, and then aging it at 40-80° C. for 6-24 hours; and subjecting the aged reaction mixture to hydrothermal crystallization, and then filtering, washing, drying and calcinating the crystallized product to obtain the mordenite. The method for preparing a mordenite provided in the present invention enlarges the sources of raw materials for a molecular sieve, has a low cost and a simple process route, and can largely reduce the cost for synthesizing a molecular sieve.

The invention relates to a novel extraction method of a plant crude drug, namely a method for extracting fucoidan polysaccharide sulfate. The name of the preparation commodity is a haikun shenxi capsule. The method comprises the following main extracting steps: (1) adding 10-fold water to a dried kelp to soak for 8 hours, controlling room temperature at 8-32 DEG C, taking a soak solution to be concentrated into 1/5 of original volume for later use, and separating out alginate on the surface of a marine organism by adopting the step; (2) taking out and cutting up the soaked kelp, and homogenating by using an AH high-pressure homogenizer; (3) adding sodium hydroxide to homogenated liquid to adjust the pH value to 12, stirring for 30 minutes, standing for 12 hours, adjusting the pH value to 1.5-2 by using a hydrochloric acid, stirring for 8 hours, and standing for 12 hours; (4) filtering; (5) merging filtrate with a concentrated solution in the step (1) and desalting by adopting specific 500 electroosmosis; (6) concentrating and decoloring soup; (7) centrifuging, and washing a filter cake by using 95% ethanol; (8) drying and crushing a dry substance. The yield is improved, and the cost is reduced. Compared with the prior art, the yield of the method is improved by over 40% by detection.

The invention discloses a preparation method of water-soluble sodium cellulose sulfate with high substituting degree, which comprises the following steps: 1) a reactor is added with concentrated sulphuric acid, slowly dropped with alcohol, stirred for reaction; the molar ratio of alcohol and concentrated sulphuric acid is 1: 1.8 to 2.8 and alcohol and concentrated sulphuric acid are mixed evenly to be made into a sulfonating agent; 2) the sulfonating agent is added with cellulose to form a non-homogeneous reacting system, stirred for reaction and washed by alcohol, thus obtaining sodium cellulose sulfate, wherein, the mass ratio of the sulfonating agent and the cellulose is 20 to 50: 1; 3) the sodium cellulose sulfate is added into water, the pH value is adjusted to 8 to 10 by using the solution of sodium hydroxide, the solution of the sodium cellulose sulfate is obtained through filteration; 4) ethanol is added into the solution of the sodium cellulose sulfate, centrifugal separation or filtering is carried out to obtain sodium cellulose sulfate precipitate which goes through vacuum drying, thus acquiring sodium cellulose sulfate. The sodium cellulose sulfate prepared by the invention has the advantages of relatively high substituting degree, little cellulose molecule degradation, relatively large molecule weight, etc., and has certain antibacterial and antivirus properties proven by research results.

The invention provides graphene-based hierarchical pore capacitor carbon and a preparation method thereof. The preparation method comprises the following steps: water-soluble sugar and a graphenes substance are subjected to a hydro-thermal reaction, a cross-linking agent is added during a reaction process, an activator is added after the reaction is complete, and then the materials are subjected to a carbonization reaction to obtain the product. The cross-linking agent is a nitrogenous foaming agent, and the activator is selected from one or more of potassium hydroxide, sodium hydroxide, zinc chloride and phosphoric acid. According to the invention, stacking and agglomeration of the graphene can be inhibited with a larger degree, the specific surface area and amount of porosity are increased, and the specific surface area utilization rate and specific capacitance are increased.

The invention provides a layered material for degrading iodine and the method for treating iodine-containing water, belonging to the water treatment technique. The inventive layered material is the layered bi-hydroxy composite metallic oxide LDHs and its sintered product CLDH, whose chemical formula is [M2+1-xM3+x (OH) 2] x+ (An-) x/2*yH2O). The invention has following advantages that: it can be directly used the LDHs into the treatment of industry acid iodine-containing waster water, or using its sintered product CLDH into the treatment of iodine-containing waste water, while said material can process the high iodine-containing drinking water to reach the standard iodine content of 10-125 ª

The invention discloses an environment-friendly composite alkaline foam cleaning agent and a preparation method thereof. The environment-friendly composite alkaline foam cleaning agent is prepared from water, sodium hydroxide, a foaming agent, a foam stabilizing agent, a dispersing agent, a chelating agent and alkylolamide. The foam cleaning agent has the advantages of being high in permeability,efficient, clean, easy to flush and the like, can form a large amount of rich and delicate foam in the use process, has long half-life and wall hanging time, can be attached to the surface of equipment for 25 min or longer, can rapidly infiltrate dirt to soften, loosen and emulsify the dirt, reduces adhesion of the dirt, can completely remove the dirt of the equipment and has lower cost.

The invention provides a method for preparing flowerlike nanometer cobalt by using electro-conductive glass FTO, an anodised aluminum template (AAO) and an aqueous high-molecular adhesive as a combined electrode. The method comprises the following steps: (1) preparation of a working electrode: a step of coating the electro-conductive glass with a solution of the aqueous high-molecular adhesive--polyvinyl alcohol (PVA) through spin coating and bonding the anodised aluminum template so as to obtain the FTO/PVA/AAO combined electrode; (2) preparation of an electrolyte: separately preparing cobaltous sulfate and a boric acid solution and mixing the cobaltous sulfate with the boric acid solution; (3) electrodeposition reaction: a step of carrying out constant-voltage electrodeposition on the combined working electrode; and (4) post-treatment: a step of soaking the working electrode having undergone electrodeposition in sodium hydroxide to remove the anodised aluminum template. According to the invention, FTO/PVA/AAO is used as the combined working electrode and constant-voltage electrodeposition is carried out so as to prepare the novel flowerlike nanostructured cobalt; and the method is simple and fast and has the advantages of mild reaction conditions, short time, high efficiency and no need for high temperature and high pressure conditions compared with conventional methods.

The invention relates to an oral cavity defect repair membrane and a preparation method thereof, in particular to an acellular matrix material and preparation thereof, and the application in the repair of oral cavity defect. The preparation comprises: (1) taking the porcine small intestine jejunum segment, cleaning, radial cutting, removing the mucosa layer, sarcolemma layer and serosa layer, andobtaining the porcine small intestine submucosa tissue membrane; (2) soaking the tissue membrane of the porcine small intestine submucosa obtained in the step (1) in peroxyacetic acid solution or sodium hydroxide solution, and take out and cleaning to obtain an acellular matrix of the porcine small intestine submucosa tissue; (3) soaking the porcine small intestinal submucosa tissue obtained in the step (2) with a dopamine solution, sterilize, and obtaining an acellular matrix material. The invention can avoid the loss of cell growth factor in the tissue membrane of the porcine small intestinesubmucosa, ensure the the obtained acellular matrix material has better tissue micropore structure and mechanical properties, and can meet the needs of oral bone injury repair; low immunogenicity andgood safety.

The invention discloses a method of synthesizing a nano zinc silicate light emitting material by using waste silicon powder by a hydrothermal method. The method comprises the following steps: (1) dissolving Zn(CH3COO)2.2H2O, Mn(NO3)2.4H2O and hexadecyl trimethyl ammonium bromide in deionized water, adding the waste silicon powder, stirring for 15 minutes, adding sodium hydroxide or ammonium water with concentration being 25%, and stirring for 10 minutes to obtain a mixed solution; (2) putting the mixed solution prepared in the step (1) in a reaction kettle with the liner being polytetrafluoroethylene, sealing the reaction kettle, putting the kettle in an oven at 130-200 DEG C to react for 12-48 hours, taking, naturally cooling to room temperature, washing the product by distilled water. carrying out centrifugal separation, and naturally drying to obtain the zinc silicate light emitting material. By using waste silicon powder as a raw material, the method disclosed by the invention expands the range of reactants and can fully utilize industrial leftovers and achieve the purpose of recycling resources. Furthermore, the method disclosed by the invention which is a hydrothermal one-step reaction is simple and feasible and low in energy consumption.

The invention relates to a zinc oxide-based nano-drug composition, and a preparation method and an application thereof. The preparation method of the composition comprises the following steps: 1, mixing a sodium hydroxide and/or potassium hydroxide-alcohol solution and a zinc acetate-alcohol solution to obtain a zinc oxide colloid reaction solution; 2, taking the zinc acetate-alcohol solution, simultaneously or successively adding the zinc acetate-alcohol solution and the drug molecule-containing sodium hydroxide and/or potassium hydroxide-alcohol solution to the zinc oxide colloid reaction solution obtained in step 1; and 3, centrifuging a mixed solution obtained in step 2, removing the obtained supernatant, washing the obtained material, purifying the washed material, and drying the purified material to prepare the composition. Zinc oxide is compounded with the drug through directly using the self properties of zinc oxide and the drug, and no polymer is introduced, so the synthesis method is simple and effective. The prepared composition has good dispersibility, the hydrodynamic size is 40-90nm, and the composition has the characteristics of high bioavailability, low toxicity and degradability.

The invention relates to a preparation method of an adsorption material for selectively adsorbing silver ions. The preparation method comprises the following steps: uniformly dispersing a chitosan-graphene oxide composite material in an acetic acid solution, adding 3-mercaptopropyltrimethoxysilane, uniformly stirring the obtained solution, adding a sodium hydroxide solution to adjust the pH value of the obtained system, adding a glutaraldehyde solution, stirring the solutions to obtain a uniformly mixed solution, standing the uniformly mixed solution at 3-4 DEG C for 20 h or more, and carrying out post-treatment to obtain the mercapto modified chitosan-graphene oxide composite material. The preparation method overcomes the shortcoming of difficulty selective adsorption of the silver ions from a complex environment of adsorption materials in the prior art. The adsorption material prepared in the invention has large adsorption capacity, can quickly selectively adsorb silver ions, and makes the silver ion adsorption balance time much shorter than the adsorption balance time in the prior art.

Provided are high purity sodium p-styrenesulfonate with an excellent hue which is useful as a reactive emulsifier or dispersant for producing a polymer emulsion, or synthetic starch for clothing ironing and poly(sodium p-styrene-sulfonate) with an excellent hue using the same or sodium p-styrenesulfonate improved in fluidity while keeping good solubility.

An aqueous p-β-bromoethylbenzenesulfonic acid solution and an aqueous sodium hydroxide solution are reacted under specific conditions to control the particle size, thereby obtaining sodium p-styrenesulfonate particles improved in a balance between fluidity and solubility, and further, impurities such as isomers are reduced, thereby obtaining high-purity sodium p-styrenesulfonate with an excellent hue.

The invention discloses methanol gasoline. The methanol gasoline is prepared from the following components in percentage by mass: 60-70% of methanol, 6-7% of aromatic hydrocarbon, 40-46% of naphtha, 0.004-0.0043% of sodium hydroxide, 0.3-0.33% of corrosion inhibitors, 0.2-0.23% of antioxidants, 0.5-0.53% of lubricants and 2-2.2% of stabilizers. The methanol gasoline has the following beneficial effects: (1) additives adopt raw materials with abundant sources, stable performance and clean emission after combustion, the mixing process is simple, the production cost is low, and the production process is free emission of three wastes; (2) the environment can be effectively protected, the fuel cost can be reduced, and the petroleum resource can be saved; and (3) the methanol gasoline has good protection effects on power systems and oil supply systems of vehicles. Actual test and inspection of the methanol gasoline show that power performance, lubrication performance, corrosion resistance, oxidation resistance, low-temperature ignition and oil consumption of the methanol gasoline are superior to that of 92# national 5 standard gasoline. The methanol gasoline fuel is simple in composition, wide in raw material resources, low in production cost, high in combustion performance, long in storage time, free of stratification and free of deterioration, and is worth of mass production, popularization and application.

The invention relates to a solid transparent pen refill. The pen refill is prepared by reacting basic oil, aliphatic organic acid and sodium hydroxide solution for saponifying and generating sodium salt, adding a mixture of glycerin, ethanol, a dye and silicon dioxide, dissolving, mixing, cooling and moulding, and comprises the following components in part by weight: 15 to 25 parts of basic oil, 40 to 60 parts of aliphatic organic acid, 5 to 15 parts of sodium hydroxide solution, 3 to 10 parts of glycerin, 10 to 20 parts of ethanol, 0.1 to 1 part of dye and 1 to 10 parts of silicon dioxide, wherein the solubility of the sodium hydroxide solution is 30 to 50 percent, the concentration of the ethanol is over 90 percent, and the silicon dioxide is gas phase silicon dioxide or liquid phase silicon dioxide. The pen refill has the advantage of low cost and is convenient to process, and a water-soluble dye and a water-soluble fluorescent dye of the pen refill can be fully mixed with various components to make the color uniform; and the formed pen refill is smooth during writing, and has high pen feel and transparency, pigments cannot be diffused on a paper surface, and sediments cannot be adhered to the paper surface.

The invention discloses a straight-chain liquid AKD surface sizing agent and a preparation method thereof. The straight-chain liquid AKD surface sizing agent is prepared from the following raw materials in parts by weight, 100-200 parts of starch, 1000-2000 parts of water, 4-8 parts of sodium hydroxide, 25-50 parts of a cationic etherifying agent, 5-10 parts of a dilute acid, 15-30 parts of a cationic monomer, 25-50 parts of acrylamide, 1-2 parts of an initiator, 5-10 parts of a dispersing agent, 20-50 parts of an AKD special cationic polymer emulsifier, and 60-150 parts of liquid AKD. The molecular structure of the straight-chain liquid AKD adopted by the invention has a lactone ring structure; reacting under neutral and alkaline conditions; the reaction functional groups and hydroxyl groups on fiber molecules are subjected to esterification reaction to be firmly bonded on the surfaces of the fibers; the hydrophobic long-chain fatty group turns to the paper surface, so that the hydrophobic effect is obtained, the stability and the sizing effect of the AKD surface sizing agent are remarkably improved by adding the AKD special cationic polymer emulsifier, meanwhile, the hydrolysis and migration tendency of AKD is limited, and AKD latex is well protected.

The invention discloses a preparation method of nano-magnesium hydroxide. The preparation method comprises the following steps: carrying out ultrasonic dispersion on ammonia water and a sodium hydroxide solution so as to obtain a mixed alkali solution, and adding the mixed alkali solution into a reactor; putting the reactor in an ultrasonic field, dropwise adding a polyethylene glycol 6000 water solution into the reactor in a constant speed, and further carrying out ultrasonic dispersion for 0.5-1 hour; dropwise adding a magnesium chloride water solution into the reactor in a constant speed; after the dropwise adding of the magnesium chloride water solution, further carrying out ultrasonic dispersion for 0.5 hour; adding turbid liquid obtained in the reaction into a hydrothermal reaction kettle for treatment, so as to obtain Mg(OH)2 precipitates; and carrying out suction filtration, washing, drying and grinding on the precipitates, so as to obtain nano-Mg(OH)2. Nano-magnesium hydroxide is prepared by virtue of an ultrasonic-hydrothermal coupling method, and reaction conditions are easily controlled, so that the problems that nano-Mg(OH)2 particles easily form colloid in a solution and are unlikely to be filtered are solved; and the particle size of the prepared nano-Mg(OH)2 particles is small, the particle size distribution is uniform, the crystallization degree is high, the technical flow of the preparation method is simplified, the energy consumption is reduced, and the production cost is saved.