343results about How to "Mild production conditions" patented technology

The invention discloses a method for preparing bifunctional mesoporous silica for adsorbing heavy metal ions in water. The method comprises the following steps: P123 is used as a structure-directing agent, mesitylene is used as a hole-enlarging agent, and mesoporous silica with large hole diameter is prepared by adopting a hydrothermal synthesis method; then, a post-grafting method is adopted, a triamine silane coupling agent (3-[2-(2-Aminoethylamino)ethylamino]propyl-trimethoxysilane) and disodium edetate dihydrate are successively used as a modifying agent, and finally the bifunctional mesoporous silica with the large hole diameter is synthesized. The adsorbent preparation process is mild in production condition and is conducted at room temperature, and other chemical reagents are not needed. The adsorption effect is good, and production cost is reduced. Meanwhile, environmental pollution is reduced, and the bifunctional mesoporous silica has a good application prospect.

A high-purity oligoxylose is prepared from corn cob through pretreating by diluted acid, digestion, enzymolyzing by xylanase, refining, ultrafiltering, and nano filtering. Its advantages are high purity (90%) and low cost.

The invention relates to a preparation method of nano-sized magnesium hydroxide, which is characterized in that a soluble magnesium salt solution and soluble lye which are added with a dispersant react in a reactor which is put in an ultrasonic tank and provided with a stirrer to obtain magnesium hydrate suspension; the magnesium hydrate suspension is processed through ultrasonic ageing at room temperature; the magnesium hydrate which is processed through ageing is dried through heating to obtain nano-sized magnesium hydroxide powders after being filtered and washed. The ultrasonic wave which is exerted during the reaction process promotes the nucleation, inhibits crystal nucleus growth velocity, and controls the size and the distribution of particles; the ultrasonic cavitation avoids the occurrence of aggregate phenomenon, and increases the uniformity and the dispersibility of nano particles; the thermal effect of the ultrasonic wave increases the crystallinity degree of the nano particles and shortens the ageing time of samples. Therefore, the preparation method has the advantages of simple technology, short production period, mild production conditions, good product dispersibility, and even particle distribution.

The invention relates to a silicon oxide-chitosan composite aerogel and a preparation method thereof. The silicon oxide-chitosan composite aerogel comprises chitosan, a chitosan cross-linking agent and silicon oxide, wherein the mass fraction of the chitosan is 9%-65%, the mass fraction of the silicon oxide is 30%-90%, and the mass fraction of the chitosan cross-linking agent is 1%-5%.

The invention discloses a high-thermal-conductivity graphene-based composite film and a preparation method thereof. Based on the mass percentage of solid raw materials, the graphene-based composite film is prepared from the following raw materials: 40-70% of graphene oxide, 30-60% of stabilizer, 1-3% of surfactant and 1-10% of reinforcing agent; the preparation comprises the following steps: mixing a graphene oxide dispersion, the stabilizer, the surfactant and the reinforcing agent dispersion, performing ultrasonic treatment, and stirring uniformly to obtain a graphene oxide-based composite dispersion; obtaining a graphene oxide based composite film by a solution film forming process; finally, performing secondary hot-pressing reduction to obtain the graphene oxide-based composite film. Thickness of the graphene-based composite film disclosed by the invention is controllable at 10-50 microns, the thermal conductivity on the room-temperature surface is 800-1,600Wm<-1>k<-1>, the tensilestrength can reach 10-30MPa, and the graphene oxide-based composite film is not broken when bent at 180 DEG C.

The invention relates to a mushroom instant food and a production method thereof, and belongs to the field of food processing technology. Dried mushroom whole plants or mushroom handles are screened, removed with impurities and treated with rehydration, texture improvement, seasoning adsorption and changing temperature cooking, etc., so as to obtain the instant food with good palatability and strong mushroom fragrance. Dried mushroom whole plants or mushroom handles are used as raw materials and treated with rehydration, rinsing, immersion, blanching, rolling, texture improvement, seasoning adsorption, dehydration for drying and changing temperature cooking to prepare strip, sheet, soft thread or powdered mushroom instant food with special mushroom fragrance, loose, soft and crisp mouthfeel. The invention expands application scope of instant mushroom; and the product contains high protein, high meal fiber, low fat, low sugar and no starch or any artificial synthesized additive, can be eaten with rice or bread or instantly and is convenient, healthful and nutrient.

The invention discloses a construction and application of an engineering bacteria secreting and expressing chitosan deacetylase, belonging to the technical field of fermentation engineering. The construction firstly constructs a recombinant Bacillus subtilis secreting and expressing chitosan deacetylase gene by a different source, and adds a signal peptide fragment yncM in the recombinant vector for a first time, wherein the signal peptide can secrete target protein chitosan deacetylase outside cells of the recombinant Bacillus subtilis, and obtain mutants in a non-translation region at 5' end, so that the expression of the target protein is significantly increased and steps of subsequent enzyme separation and purification are greatly simplified. The enzyme activity of obtained chitosan deacetylase is up to 1548.7 U/ mL and the yield of chitosan deacetylase is up to 620 mg/ L when fermentation medium is fermented and cultured for 50-60 hours. And meanwhile, the method has the advantages of low production cost, mild production conditions, simple purification process, safe operation and the like.

This invention describes a process for the recovery and recycle of industrial waste solids, especially the salt-alkali separation and recycle of the waste salt-alkali solids from the manufacturing of hydrated nitriles. This invention uses water, mother liquid and sodium bicarbonate to wash the waste salt-alkali solids from the manufacturing of hydrated nitriles, so that Na2CO3 and NaOH in the waste salt-alkali solids are washed into the solution. The washing solution is then cooled to 0-5deg.C, and filtrated and separated to obtain solid sodium carbonate decahydrate, which can be commercialized after washing. The mother liquid, after separating the solid alkali, is directed to the next process for washing the waste salt-alkali solids without discharge. During the circulatory washing of the waste salt-alkali solids, the table salt keeps in the solid state. After centrifugal separation, the table salt containing 3% of alkali can be obtained and used for sodium carbonate industry. The said table salt NaCl, after washing and separation to remove a small amount of hydrazine and amine, can be used for chlorine-alkali industry. Chlorine Cl2 and sodium hydroxide NaOH are raw materials for sodium hypochlorite NaClO, which is a raw material for producing hydrazine hydrate. In addition, sodium hydroxide is directly involved in the reaction for producing hydrazine hydrate N2H4íñH2O, thus constituting an internal recycling system of a manufacturing plant without discharging, which not only is environmentally friendly but also reduces transportation load and production cost. This invention describes a rational process for large-scale hydrazine hydrate manufacturing plants.

The invention relates to an edible mushroom flavor paste and a production method thereof, and belongs to a food processing technology. The entire plants of edible mushrooms are cleaned and screened to remove impurities, and then are subjected to washing, flavor-optimizing, limited-dehydrating, crushing, blending, sterilizing and other treatments so as to produce a sauce seasoning which has well palatability and intense aromas and flavor. The production method provided by the invention can be used for widening the application range of edible mushroom and increasing the varieties of the sauce seasonings; in addition, the product has high protein and high dietary fiber without any artificially synthesized additives, and is convenient, healthy and nutrient serving good item.

The process of preparing fibrous nanometer alumina powder includes the following steps: dissolving ammonium aluminum sulfate and ammonium bicarbonate separately in double distilled water to compound solutions; adding polyglycol into the ammonium aluminum sulfate solution to prepare solution A of ammonium aluminum sulfate containing polyglycol, adding Span-80 into the ammonium bicarbonate solution to prepare solution B of ammonium bicarbonate containing Span-80 and regulating pH value, adding the solution A into the solution B via stirring, centrifuging, washing, azeotropic distillation to dewatering, and calcining at 850-900 deg.c or 1100-1150 deg.c to nanometer fibrous gamma-Al2O3 powder or nanometer fibrous alpha-Al2O3 powder. The process is simple and low in cost, and the prepared fibrous product with high specific surface area may be used in ceramic material, nanometer composite material, etc in different fields.

The present invention provides the synthesis process of 1, 7-disubstituent-3, 4: 9, 10-perylene bisimide. The synthesis process includes the following steps: A. refluxing perylene tetrabasic dihydride with first-order amine as solvent for 20-60 hr to produce perylene bisimide; B. refluxing perylene bisimide and liquid bromine in dichloromethane solvent for 10-60 hr to produce dibromoperylene bisimide; and C. reacting dibromoperylene bisimide and phenol inside N-methyl pyrrolidone in the presence of carbonate at 90-140 deg.c for 10-60 hr to produce 1, 7-diphenol-3, 4: 9, 10-perylene bisimide; or reacting dibromoperylene bisimide in second-order amine as solvent at 40-70 deg.c for 10-30 hr to produce 1, 7-diimido-3, 4: 9, 10-perylene bisimide.

The invention provides a method for detoxifying barbadosnut seed dregs and preparing protein concentrates, which belongs to the field of fine and further processing of barbadosnut seed dregs. The method comprises the following steps of: destroying plant cell walls by firstly using an extruding bulking machine as a reactor and then utilizing biological enzymolysis, then eluting by using alcohol with a proper concentration, thereby solving the problem of toxin residual of the barbadosnut seed dregs and simultaneously preparing the protein concentrates of the barbadosnut seed dregs; and finally, carrying out nutrition evaluation on the protein concentrates of the barbadosnut seed dregs. The method has the advantages of low requirement on equipment, simple production process, low production cost and environmental friendliness without using strong acid and strong base for treating the barbadosnut seed dregs, also has low cost of raw materials and low production cost and is suitable for large-scale industrial production. Meanwhile, the method also meets the requirements of fine and further processing field of agricultural products in the 'National Guideline on Medium- and Long-Term Program for Science and Technology Development' and has very obvious social and economic benefits and significance.

The invention relates to a synthetic method for ceftaroline fosamil. According to the synthetic method, 7-phenylacetamide-3-hydroxy-3-cephalosporin-4-carboxylate-diphenylmethyl is selected as a raw material to be chloridized and reacts with 4-(4-pyridyl)-1,3-thiazole-2-thiol sodium salt at a C-3 site to obtain a thioether compound, p-cresol and immobilized penicillinase are adopted for removing carboxyl and amino protecting groups respectively, the thioether compound and the acylated AE-active ester are subjected to C-7 site condensation reaction, and crystallization in acetic acid is performed after hydrolyzation to prepare the ceftaroline fosamil successfully. The preparation method has the advantages that use of toxic and harmful substances such as trifluoroacetic acid and phosphorus pentachloride is avoided, reaction conditions are moderate, side reactions are few, technology is simple, yield and product purity are high, cost is low, raw materials are cheap and easy to obtain, and the preparation method is applicable to industrial production.

The invention provides a method for comprehensively extracting protein, polysaccharide and polyphenol from avocado kernels. The method provided by the invention comprises the following steps: (1) grinding, drying and degreasing avocado kernels, then performing extraction by using ethanol/water, concentrating, adjusting a pH value of an extracting solution to reach a protein isoelectric point so as to ensure that protein is precipitated, performing solid-liquid separation, and drying to obtain protein; (2) performing macroporous resin adsorption on supernatant liquor obtained by protein precipitation, and drying an outflow fluid to obtain polysaccharide with relatively high purity; and (3) eluting macroporous resin by using an ethanol solution, and concentrating and drying an eluant to obtain polyphenol with relatively high purity. According to the method provided by the invention, three products namely protein, polysaccharide and polyphenol are sequentially obtained from the avocado kernels; and moreover, the method is simple in process, mild in production condition and relatively high in purity of the obtained products, and is suitable for industrial production; and solvents used by the method are mainly water and ethanol, so that the method is small in environmental pollution and low in production cost.

The invention discloses an aluminum sol production method and an aluminum sol production system. The an aluminum sol production method comprises: (1) making an aluminum source contact an acid to obtain a solution containing an aluminum salt; (2) making the solution containing the aluminum salt contact an alkali to obtain a salt-containing aluminum sol; (3) carrying out ordinary electrodialysis onthe salt-containing aluminum sol to obtain a desalted aluminum sol and a recovered salt; and (4) carrying out bipolar membrane electrodialysis on the recovered salt to respectively obtain a recoveredacid and a recovered alkali, wherein at least part of the recovered acid is recycled in the step (1), and at least part of the recovered alkali is recycled in the step (2). According to the present invention, with the production system and the production method, the raw materials have characteristics of low price and high utilization rate, the quality of the prepared aluminum sol is good, and thewhole production process has the mild condition, and is environmentally friendly.

The invention relates to a preparation method for a cephalosporin anti-infective drug-cefazedone sodium, belonging to the field of pharmaceutical synthesis. According to the invention, the method uses GCLE as a raw material to substitute 7-ACA and overcomes the defects of low yield, high pollution and the like in prior art; the preparation method with mild reaction conditions, little side reaction and simple process is provided; meanwhile, the method has the advantages of cheap and easily-available raw materials, low cost, high product yield, high product purity and applicability to industrial production.

The invention provides a production method of tobacco sheets. The production method of tobacco sheets includes the following steps: (1) mixing cabo, tobacco powder and water evenly, heating and extracting for 2-3 times, filtering to obtain filtrate and filter residue, combining the filtrate, and concentrating the filtrate to obtain a concentrated solution; (2) adding a composition of cedrela sinensis, giant knot weed extract and enzymic preparation in the concentrated solution, performing enzymatic reaction, and heating and deactivating enzyme to form coating liquid; (3) adding pulp in the filter residue, mixing evenly, pulping, and adding an addition agent to obtain mixed pulp; and (4) adopting a paper-making method, making the mixed pulp into sheet paper bases, coating the coating liquid on the sheet paper bases, drying, and manufacturing the tobacco sheets. The production method of reconstituted tobacco adopts a treatment process combining the enzymic preparation composition and the addition agent, can reduce content of lignin, and improves smoking effect.

The invention discloses a process for co-production of collagen calcium and polypeptide in chondroitin sulfate production. The production process includes: conducting coarse crushing on shark cartilage to a massive size, performing soaking in an acid solution and then conducting filtering, subjecting the filtrate to calcification treatment and alcohol precipitation, conducting secondary washing with alcohol, and then carrying out spin-drying and drying to obtain collagen chelated calcium; subjecting the soaked cartilage to enzymolysis and filtration to obtain a chondroitin sulfate and collagen polypeptide aqueous solution and bone dreg, subjecting the aqueous solution to ultrafiltration separation to obtain a chondroitin sulfate concentrated solution, and performing alcohol precipitation to obtain chondroitin sulfate; and concentrating the ultrafiltrate, and then carrying out spray drying, thus obtaining collagen polypeptide. On the basis of co-production of chondroitin sulfate and collagen polypeptide, the invention also produces another high benefit product at the same time, i.e. collagen chelated calcium, makes full use of the resources in cartilage, performs high value utilization of bone calcium powder in treatment process, and improves the economic value.

The invention relates to an edible oil production and processing technology, in particular to a method for extracting camellia oleosa seed oil by weak acid aqueous solution. The technical scheme adopted by the invention is that camellia oleosa seeds are taken as raw materials, and are added in the weak acid aqueous solution for slurry mixing after being subjected to superfine grinding, the constant temperature mixing and extracting are carried out on slurry after the slurry is gelatinized for a period of time, and the obtained extract liquid is subjected to two-step centrifugal separation to obtain the camellia oleosa seed oil. The camellia oleosa seed oil is clear, transparent, light yellow, and even golden yellow, does not contain benzo(a)pyrene, has no residual organic solvent, and can reach the national-level camellia oil edible safety standard without refining or after being subjected to simple refining. According to method, the production technology is simple, biological enzyme is not used during the production process, the processing temperature is low, the production cost of the camellia oleosa seed oil is lowered, so that the method is suitable for industrial large-scale production; meanwhile, the problems of low camellia oleosa seed oil yield, high energy consumption, existence of residual organic solvent, serious active nutritional ingredient loss and the like in a conventional production method are solved.

The invention discloses a low-cost synthesis process for synthesizing 1,2-pentanediol from n-butyl alcohol. The method comprises the following steps of: synthesizing butyl sulfosalt from n-butyl alcohol and thioether in the presence of the catalysis of strong acid by adopting the n-butyl alcohol as a starting raw material; then reacting the butyl sulfosalt with methanal to obtain 1,2-epoxy pentane; and carrying out ring opening in the presence of the catalysis of barium hydroxide to obtain the 1,2-pentanediol. Compared with a process using n-amylene as a raw material, the method greatly reduces the production cost, has moderate and reliable production condition and is quite stable and safe.

The invention relates to a water-insoluble cyclodextrin-based metal organic framework material and a preparation method thereof. The method comprises the steps: mixing cyclodextrin, sylvite and deionized water, carrying out ultrasonic treatment, dropwise adding an embedding substance active molecule solution, carrying out ultrasonic treatment, adding crystallization induction molecules, standing for crystallization, washing, drying, mixing the obtained crystal, a catalyst, a cross-linking agent and a solvent, and carrying out cross-linking reaction. The method is simple, mild in production condition and suitable for industrial application; and the prepared metal organic framework material has excellent structural stability, more active sites and high specific surface area, can realize efficient enrichment of pollutants in printing and dyeing wastewater, and is beneficial to rapid removal of the pollutants.