598results about How to "The reaction process is simple" patented technology

Production of Barbary Wolfberry Fruit polysaccharide is carried out by taking Barbary Wolfberry Fruit as raw materials, soaking, crushing, extracting, enzyme hydrolysis reacting, column chromatography acting, depositing by alcohol, dealcoholizing and drying. It's cheap and simple, has short production period and better purity.

The invention discloses a template-free preparation method of hollow micro-spherical polymers with covalent organic frameworks (COFs), belonging to the field of inorganic nonmetal materials. The template-free preparation method comprises the steps of firstly, adding an organic aldehyde ligand and an amine ligand into a solvent, adding a certain quantity of additives after dissolving and dispersing, and controlling the reaction temperature, the concentrations of the ligands and the reaction time to obtain a solid sediment; and filtering, washing and drying to obtain hollow microspheres with the COFs. The structural characteristics of the hollow microspheres with the COFs are simultaneously determined by the kinds of the ligands, the reaction time, the reaction temperature and the solvent in the reaction system. The template-free preparation method has the advantages that the application range of a direct synthesis method to COFs synthesis is widened, and the hollow appearances of the polymers are obtained; the prepared hollow microspheres have high porosity which can be up to 85%, and the thickness and surface polarity of a spherical shell can be controlled through regulating reaction conditions in the system; and the method disclosed by the invention is simple in reaction process, high in yield, mild in condition, short in process and suitable for industrial production.

The invention discloses a three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material as well as a preparation method and an application thereof. The three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material is formed by uniformly loading carbon-coated tin nanometer particles on a three-dimensional graphene network. The preparation method comprises the following preparation processes: fully dissolving and mixing NaCl serving as a dispersing agent and a template with a metallic tin source and a carbon source, carrying out freeze drying, and porphyrizing, thus obtaining a mixture; putting the mixture in a tubular furnace, and calcining under the effect of hydrogen catalysis, thus obtaining a calcined product; and washing the calcined product, thus obtaining the three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material. The preparation method has the advantages that the preparation process is safe and harmless, the operation is simple, the yield is high, and when being used as an anode material for a lithium ion battery, the prepared three-dimensional graphene reticular structure loaded carbon-coated tin nanometer material has relatively high reversible capacity and cyclic stability.

The disclosed preparation method for chitose/chitosan oligosaccharide with low molecular weight as 0.18-15mega and well water-solubility comprises: preparing water-soluble chitosan by acetylization; degrading the product with non-specific hydrolase while controlling the enzyme dosage and reaction time; adjusting the degraded product pH value to 8-9 with KOH or NaOH solution; depositing with ethanol, cleaning, and vacuum drying the final product with free amidogen that can promote wound healing, restrains tumor cell growth and improves human immunity. Compared with prior art, this invention is convenient to control for wide application.

The invention discloses a catalytic synthesizing technique of 4, 4'-diamino diphenylmethane, which comprises the following steps: adopting phenylamine and formaldehyde as raw material to do one-step condensed reaction intervally acted by solid acid catalyst; setting the molar rate of phenylamine and formaldehyde at 10/1-2/1 under 100-200 deg.c for 1-8h; circulating diamino diphenylmethane; recycling USY to synthesize the product with high activity.

The synthesis process of cholesterol with diosgenin as material includes the following six steps: protecting hydroxyl radical, ring-opening reaction, sulfonylation reaction, reducing sulfonate, methyl ether radical acetylation and saponification to obtain cholesterol. The present invention also discloses two kinds of the intermediate obtained in the process, i. e., 16, 26-dihydroxy cholesterol-3-methyl ether and 16, 26-dimethyl sulfonyl cholesterol-3-methyl ether. The present invention has simple reaction process and high yield, and is suitable for industrial production.

The invention relates to a preparing method for self-healing polysaccharide hydrogel. The preparing method comprises the steps that cellulose is added into ionic liquid to be dissolved, the mixture is then cooled to the room temperature, and a cellulose solution is obtained; the cellulose solution is heated and dripped with tert-butyl acetoacetate under the protection condition of introducing nitrogen, a reaction is carried out at the constant temperature, the solution is then cooled to the room temperature, purified and subjected to vacuum drying, and acetoacetic acid cellulose is obtained; under the room temperature, a chitosan solution is added into the acetoacetic acid cellulose solution, oscillated and mixed, and the self-healing polysaccharide hydrogel is obtained. The polysaccharide hydrogel prepared through the method has the self-healing performance, and has the pH responsiveness at the same time. The preparing method is simple in process, rich in raw material and suitable for modification of most polysaccharide derivatives; meanwhile, due to the good biocompatibility of cellulose and chitosan, the prepared polysaccharide hydrogel has good application prospects in the fields such as tissue engineering repair, medicine controlled release and biological bionics.

The invention discloses a polyolefin resin nucleating agent and a preparation method thereof. The nucleating agent is polyol acetal-silica gel graft copolymer shown as a right general formula (I); the nucleating agent improves the stability of organic acetal and environment-friendly performance, reduces the production cost and remarkably improves the mechanical performance and thermal performance of polyolefin resin in particular.

The present invention provides a catalyst for water phase hydrogenation preparation of cyclopentanone from furfural or furfural alcohol and a preparation method thereof, the catalyst is a supported catalyst comprising an active ingredient and a carrier; the active component is one or two substance selected from Cu, Ni, Ru, Pd or Pt; the carrier is a magnetic iron oxide with the formula of FeyOx, wherein the ratio y / x is greater than 2/3 and less than 1; and the mass of the active ingredient 2. 0 to 10.0% of the carrier mass. The present invention also discloses a method for water phase hydrogenation preparation of cyclopentanone from furfural or furfural alcohol by use of the catalyst. The method has the advantages of simple operating steps and easy controlled operating conditions. The synthesized catalyst has good catalytic effect, high cyclopentanone product selectivity, and magnetic property, a magnet is used to attract the catalyst, separation and recovery of the catalyst are facilitated, and the catalyst has good prospects.

The invention provides a method for preparing compound powder of alumina and chrome oxide from chromium-containing aluminum sludge. The method comprises that contents of Al, Cr, and Fe in the chromium-containing aluminum sludge are weighed, an inorganic acid solution is added according to the contents, and the mixture is heated and stirred until the mixture is completely dissolved; or that the chromium-containing aluminum sludge is heated, the inorganic acid solution is added, and the mixture is stirred while maintaining the temperature till the mixture is completely dissolved; that a required reducing agent is calculated and then added for reaction, after which the solution is kept stand and cooled; that the pH value of the solution is adjusted to 2.5-3.5, the solution is filtered to remove impurities, a liquid dispersant is added to mix the solution evenly, the PH value of the solution is then adjusted to 5.0-7.8 to generate a mixed deposition, the solution is filtered after full settlement to obtain a filtrate and a filter cake, the filter cake is washed till a washing solution contains no Cr(VI), and the washing solution is added into the filtrate; that the washed filter cake is dried; and that the object product is obtained by crushing, grinding and calcining. The method fundamentally solves environmental pollution of the chromium-containing aluminum sludge, and comprehensively utilizes the chromium-containing aluminum sludge. The method is simple in reaction processes and has no by-products, and products of the method are easy to control and reach nano-level granularity. Thus, the method can be used for producing grinding materials, cutting tools and refractory materials.

A process for preparing acetonyloxime or butanonyloxime by oxidizing acetone or butanone includes dissolving acetone or butanone is isopropanol or tert-butanol, adding catalyst TS-1 and ammonia, and slowly dripping hydrogen peroxide while reaction for 0.25-12 hr. Its advantages are high conversion rate and high selectivity.

The present invention discloses a method of extracting vitamin E from plant oil deodorized and distilled substance of plant oil. The present invention has a following technical proposal: through crystallization of previously separated crude sterol and molecular distillation of sterol ester, two types of lipase are orderly used respectively to realize the methyl esterification of free fatty and the esterification of triglyceride in deodorized and distilled substance. Then the molecular distillation technology is used to realize the separation of methyl ester and vitamin E in the fatty acid so as to prepare the concentrated vitamin E product. The present invention uses lipase to replace the conventional strong acid and alkali. Two types of lipase are used to replace the methyl esterification of free fatty and the esterification of triglyceride in deodorized and distilled substance. Compared with the prior art, the reaction of the present invention occur in a mild circumstance; the reaction process is easy to be controlled, and conducive to the recycling and use of vitamin E. Besides, the operation is relatively simple and has no problems of environmental pollution. The purity of concentrated vitamin E can reach above 30 percent.

Production of secondary amine compound is carried out by taking nitro-compound, phenol or aldehyde compound as raw materials, catalytic hydrogenation reacting for 1-20hrs at 0.5-5.0MPa and 30-200 degree under the existence of solvent and catalyst, and separation purifying to obtain the final product. The solvent is fatty alcohol containing 1-4 atoms or its solution or water; the catalyst can be Raney Ni catalyst or nickel-carried catalyst or noble- metal-carried catalyst; the noble-metal-carried catalyst can be palladium-carried or platinum-carried or ruthenium-carried catalyst. It's simple and cheap, has higher conversion percent and better selectivity.

The invention relates to a method for synthesizing a carbyne nano-material from calcium carbide and polyhalohydrocarbon as raw materials through ball-milling and belongs to the field of preparation of novel carbon nano-materials. The method is characterized by comprising the steps: adding the calcium carbide and the polyhalohydrocarbon, which serve as the raw materials for preparing the carbon material, into a ball milling tank in one time or in a staged manner according to a certain ratio, and carrying out a ball-milling reaction for a certain time; and after the reaction ends, subjecting the product to acid washing, and performing water washing and drying, thereby obtaining the carbyne nano-material. According to the method, the reaction raw materials are cheap and readily available, the reaction conditions are mild, and the reaction equipment and process are simple. The produced carbon material is uniform in texture and excellent in physico-chemical properties and has a broad application prospect in the fields of energy, catalysis, environmental protection and the like.

The invention relates to a product prepared through a chemical reaction between graphene oxide and polyethyleneimine (PEI) polymer and to a preparation method. The obtained product is graphene oxide-polyethyleneimine composite; experiment raw materials are graphene oxide and PEI, wherein graphene oxide is a product prepared through chemical oxidation and can be oxidized graphene or carboxylated graphene, and the graphene oxide contains active groups like hydroxyl groups, carboxyl groups and oxygen-containing functional groups, which is beneficial for formation of the composite product. The invention also provides a preparation method for a graphene oxide-polyethyleneimine composite. The composite prepared in experiments has an obvious fold structure; thus, it is proved that the composite product has a specific surface area greater than the specific surface area of graphene and has more adsorption sites, so the composite product can be used for absorbing gas like CO2 and NH3 in flue gas.

The invention provides a preparation method of carboxymethyl pachyman and a novel application of the carboxymethyl pachyman. According to the method, in the process of carrying out carboxymethylation modification on pachymaran, components and ratios of a reaction medium are changed, the reaction temperature is regulated and a catalyst process is adopted, so that the carboxymethylation efficiency of the pachymaran is remarkably improved, the utilization rate of the raw and auxiliary materials is increased, and the cost is saved. Meanwhile, by virtue of the novel application of the carboxymethyl pachyman prepared by the method to preparation of immunopotentiators of livestock and poultry, the immunity to pathogenic microorganisms of the livestock and the poultry can be remarkably enhanced, and the immune efficacy of vaccines can be improved; by virtue of the novel application of the arboxymethyl pachyman prepared by the method to feed additives, the meat performance of the livestock and the poultry can be effectively improved.

The invention discloses a preparation method of sea urchin-like Ni/Co composite basic carbonate and belongs to the technical field of inorganic material preparation. The preparation method includes the steps of adding a precipitating agent to a mixed solution containing a nickel salt and a cobalt salt, obtaining a compound precipitation with control of the reaction temperature, and filtering, water-washing and drying the precipitation to obtain the sea urchin-like Ni/Co composite basic carbonate microspheres. The invention has following advantages: (1) a quick preparation method of the sea urchin-like Ni/Co composite basic carbonate microspheres is provided; (2) by means of the method, the morphology of the prepared sea urchin-like Ni/Co composite basic carbonate microspheres can be adjusted through adjustment of temperature; and (3) the method is simple in reaction process, is mild in condition, is short in processes and is suitable for industrial production.

The invention relates to the technical field of microbial genetic engineering, in particular to a recombinant cell and application thereof to catalytic synthesis of D-pantolactone. The recombinant cell conducts induction to generate L-pantolactone dehydrogenase, D-ketopantolactone reductase and glucose dehydrogenase, and DL-pantolactone or L-pantolactone can be directly synthesized into the D-pantolactone. The invention further provides a method for synthesizing the D-pantolactone through multienzyme cascade direct catalysis. Compared with an enzymatic resolution technology applied to the industry, the reaction process is simplified, and the reaction efficiency is improved.

The invention relates to a Ziegler-Natta polyethylene catalyst used for vinyl polymerization, a preparation method and an application thereof. The main catalyst component of vinyl polymerization catalyst is prepared by the reaction with the following method: using magnesium powder as raw material for reaction to generate new ecological halide; leading the new ecological halide to have complexation reaction with titanium compound and treated silicon dioxide under the condition that electron donor exists; leading complexation product to have contact reaction with alkyl aluminium compound in alkane solvent system; and after heating and drying, having complexation reaction on the product of the contact reaction and polymer containing polar functional group in the alkane solvent system. The polyethylene catalyst is formed by the main catalyst component and cocatalyst metal organic compound, is higher in polymerization activity, and has the advantage that the produced polymer has wider molecular weight distribution.

The invention belongs to the technical field of cement concrete admixtures, and in particular relates to an oxydative degradation starch grafted polycarboxylate superplasticizer and a preparation method thereof. The invention provides a resource of raw materials for preparing the novel efficient polycarboxylate superplasticizer, namely, natural and degradable starch is introduced to take the place of most part of petrochemical materials, the raw materials are wide and sustainable in resource, and not only is the cost lowered, but also the environment is protected.

The invention relates to esterification catalyst, which is inorganic compound including ionic liquid and inorganic compound with Lewis acid. The cation of the ionic liquid is imidazole or pyridine taken place by C1C15 alkyl, wherein, the substituting group number is one or more, and the anion is BF4<-> or PF6<->; the inorganic compound with Lewis acid is selected from FeCl3, SnCl4, ZnCl2 or Zn (NO32) and so on, and the mol ratio of the inorganic compound with Lewis acid and the ionic liquid is 0.01 to 1.0:1. The catalyst is used for esterification reaction, the selectivity is good, the yield rate of the esterified ester is high, and the service life is long.

The invention discloses enzymatic catalysis prepared special grease for quick-frozen food and a preparation method thereof. The enzymatic catalysis prepared special grease for the quick-frozen food is composed of the following raw materials according to the proportion by mass: 100 parts of transesterification grease, 1.0-2.5 parts of emulgator, and 0.002-0.010 part of antioxidant, and the transesterification grease is prepared from palm stearin and liquid vegetable oil through exchange of lipase and catalyze ester. The preparation method includes the following steps: adding the antioxidant into the prepared transesterification grease when the prepared transesterification grease is under 55-70 celsius degrees, stirring fully and mixing evenly, and then adding the emulgator, heating and emulsifying, rapidly cooling grease which is emulsified evenly, homogenizing, and accordingly conducting curing processing, namely obtaining the special grease. The preparation method has the advantages of being simple, high in catalytic efficiency, small in environmental pollution, and the like. Meanwhile, a product and catalyst are easy to separate. The prepared special grease has wide plasticity and good processing performance.

The invention relates to a molybdenum disulfide nano-sheet preparation method based on a sodium chloride template. The method comprises the following steps: one or a mixture of two selected from ammonium molybdate and sodium molybdate is adopted as a molybdenum source; thiourea is adopted as a sulfur source; the molybdenum source, the sulfur source and NaCl are dissolved in deionized water according to a molar ratio that molybdenum in the molybdenum source to sulfur in the sulfur source is 1:(1.8-2.5) and according to that the molar ratio of molybdenum in the molybdenum source to NaCl is 1:(150-600); freezing and vacuum drying are carried out, such that a mixture is obtained; the prepared mixture is ground into powder; the powder is sieved and is laid in a square boat; the powder is placed in a tubular furnace thermostatic zone, and is subjected to calcining and chemical vapor deposition, such that a product A is obtained; the product A is washed and vacuum-dried, such that the molybdenum disulfide nano-sheets are obtained. with the method provided by the invention, molybdenum disulfide nano-sheets with characteristics of high quality, uniform dimension, relatively controllable layer number, relatively high yield and relatively low preparation cost can be obtained.

The invention relates to a low-temperature aqueous-phase catalyst for lignin phenol derivative hydrodeoxygenation and a preparation method thereof. The catalyst comprises a zeolite molecular sieve HBeta serving as a carrier and a load Ru, wherein the molar ratio of silicon to aluminum is 10-50, and the loading amount of Ru is 0.1 to 2%. The preparation method comprises the following steps: mixing measured aqueous solution of RuCl3 with a zeolite suspension, evaporating water and drying, and then reducing the obtained solid with hydrogen/argon mixed gas. A cyclic hydrocarbon (the conversion rate is greater than 98% and the selectivity is greater than 95%) is prepared at high selectivity under the relatively mild (100-150 DEG C and 1-4MPa) condition, so that the defects that the reaction conditions are harsh and the energy efficiency is low in the refining process of biomass pyrolysis oil can be overcome. The bifunctional catalyst provided by the invention has the advantages of simplicity and easiness in operation in the preparation process, stable physical and chemical properties, and direct application. At low temperatures, the catalyst shows excellent hydrodeoxygenation activity and extremely high selectivity of saturated hydrocarbons, has a simple and environment-friendly reaction process, and can be widely used in the refining of bio-gasoline.