105results about How to "Raw material stability" patented technology

A raw material gas supply apparatus includes a liquid raw material gas supply source, a source tank storing liquid raw material, a gas distribution passage through which raw material gas comprising steam of the liquid raw material is supplied to a process chamber from the source tank, an automatic pressure regulator installed on an upstream side of the gas passage, wherein the automatic pressure regulator keeps supply pressure of the raw material gas at a set value, a supply gas switching valve installed on a downstream side of the gas passage, wherein this valve opens and closes the gas passage, an orifice provided on at least one of an inlet side or outlet side of the valve, wherein the orifice regulates flow rate of the raw material gas, and a constant temperature heating device heats the source tank, the gas passage, the valve and the orifice to a set temperature.

A method for purifying a desired heterologous polypeptide from microbial fermentation broth or homogenate in which it is produced and solubilized is described. This method involves adding to the broth or homogenate an effective amount of a solution of 6,9-diamino-2-ethoxyacridine lactate (ethacridine lactate) to precipitate host cell impurities under conditions wherein the majority of polypeptide remains soluble, and separating the desired polypeptide from the broth or homogenate. The broth or homogenate containing the ethacridine lactate and polypeptide is also disclosed.

The invention provides modified biomass charcoal for treating arsenic pollution as well as a preparation method and an application of the modified biomass charcoal. The preparation method of the modified biomass charcoal comprises steps as follows: (1) biomass raw materials are charred, and the biomass charcoal is obtained; (2) the biomass charcoal is subjected to a reaction with a hydrochloric acid solution, solid-liquid separation is performed, a solid substance is obtained, is washed till the pH is neutral and then is dried, and the pretreated biomass charcoal is obtained; (3) the pretreated biomass charcoal and a FeCl3 solution are subjected to a reaction under the condition that the solution pH is neutral, solid-liquid separation is performed after the reaction, and mud cake is obtained; (4) the mud cake is dried and then washed till the pH is neutral, solid-liquid separation is performed, an obtained solid is dried for a second time, and the modified biomass charcoal is obtained. The modified biomass charcoal has large specific surface area and high iron content; the preparation method is simple and easy to operate; the modified biomass charcoal can be applied to treatment of arsenic waste and passivation of arsenic in farmland soil, and food safety is guaranteed.

The invention discloses a full-particle size ultrahigh-performance concrete composition which is prepared from the following components: 100 parts of cement, 10-80 parts of admixture, 5-20 parts of expanding agent, 1-20 parts of viscosity regulator, 120-210 parts of sand, 80-140 parts of rubble and 5-10 parts of super plasticizer while certain volume dosage of fiber is added. The full-particle size ultrahigh-performance concrete composition disclosed by the invention has controllable rheological property and shrinkage strain property and ultrahigh mechanical property and durability. Water is directly added on the site according to a proportion, and the full-particle size ultrahigh-performance concrete can be obtained through forced stirring.

The invention discloses a polypeptide iron chelate prepared from soy isolate protein serving as a substrate and a preparation method of the polypeptide iron chelate. The polypeptide iron chelate is prepared from the soy isolate protein serving as a base material which is subjected to fermentation, enzymolysis, nanofiltration, chelation and drying, and polypeptide produced after fermentation, enzymolysis and filtration of the soy isolate protein is taken as a chelating agent for preparation of the polypeptide iron chelate. Compared with like polypeptide iron chelated iron, the purity of the polypeptide iron chelate is greatly improved and the content of the polypeptide iron chelate is greatly increased, the polypeptide iron chelate can completely replace pure microelement additives to be directly added to feed, and the application effect is good; the feed attractant effect is good; the product is stable and contains a large number of multifunctional polypeptide substances.

The invention discloses a preparation method of 2-methyl-1,2-propane diamine. The method comprises the following preparation steps of: 1) preparing alpha-amino isobutyronitrile (I); 2) preparing alpha-acetamido isobutyronitrile (II); 3) preparing 2,4,4-trimethyl-2-imidazoline (III); and 4) preparing 2-methyl-1,2-propane diamine (IV). The preparation method disclosed by the invention has the advantages of stable raw materials, low cost, mild reaction conditions and high reaction yield and is easy to industrialize. The solvent in the reaction process can be recycled by distilling.

The invention provides a healthcare animal growth promoter containing soybean oligosaccharides and clostridium butyricum. The healthcare growth promoter is characterized by being prepared by taking the soybean oligosaccharides and the clostridium butyricum as main active ingredients and attapulgite as a carrier and compounding, wherein the soybean oligosaccharides account for 15%-40% of the total weight, the clostridium butyricum accounts for 30%-55% of the total weight, and the attapulgite accounts for 5%-55% of the total weight; the purity of the soybean oligosaccharides is equal to or higher than 95%; the total viable count of the clostridium butyricum is equal to or higher than 1.0*1010 CFU/g; the additive amount of the healthcare growth promoter in a feed is 0.05%-2%. The healthcare growth promoter has the benefits as follows: (1) the growth speed of domestic animals can be remarkably increased; (2) the immunity and the breeding safety of the domestic animals can be improved and the survival rate of the domestic animals can be increased; (3) the raw materials are safe, stable, nontoxic, pollution-free and residue-free, and the novel healthcare animal growth promoter is safe, efficient and green.

The invention relates to aqueous solution with fine water mist fire extinguishment additive, with the quality percentage of all components as below: ammonium chloride 0 percent to 1 percent, polyvinyl alcohol 0 percent to 1 percent, sodium acetate 0 percent to 0.5 percent, surface active agent 0.01 percent to 0.25 percent, urea 0 percent to 1 percent, rust preventive 0.01 percent to 0.25 percent, and the rest is water. The aqueous solution can improve the fire extinguishing efficiency of the fine water mist and effectively prevent after-combustion of inflamers; has little corrosion to equipments and instruments; basically has no pollution to fire scenes; is high-efficiency, stable and clean; the raw materials of all components are easy to be obtained; has stable performance; is basically nontoxic and low in cost; and has low consumption.

The invention belongs to the technical field of chemical engineering and particularly relates to a method for synthesizing an o-benzenedicarbinol derivative. Phthalide as a raw material is subjected to a reduction ring-opening reaction under the action of alkali and silane compounds, and o-benzenedicarbinol is prepared. According to the method, raw materials are easy to obtain, the method is simple and convenient to operate, the reaction selectivity is high, the product yield is high, and the reaction condition is mild; the synthesized monosubstituted or polysubstituted o-benzenedicarbinol derivative has high quality and good functional group compatibility.

The invention discloses polypeptide zinc chelate prepared with soy protein isolate as base and a preparation method. The polypeptide zinc chelate is prepared by soy protein isolate as base through fermenting, enzymolysis, nanofiltering, chelating and drying. After fermenting, enzymolysis and filtering of the soy protein isolate, polypeptide is generated as chelate to obtain polypeptide zinc chelate.Purity and content of the polypeptide zinc chelate are higher than those of the like polypeptide chelate zinc, and the polypeptide zinc chelate can be directly added into fodder completely instead of pure microelement additive and is excellent in application effect. The polypeptide zinc chelate is good in food calling effect, stable and contains much multifunctional polypeptide.

The invention provides a high-temperature-resistant water-based aluminized transfer coating composition and a preparation method thereof; the coating composition comprises the following components in parts by weight: 60-85 parts of water-based resin, 10-35 parts of high-temperature-resistant silicone resin , 1-2 parts of co-solvent; 1-4 parts of deionized water; 0.02 parts of wetting agent; 0.01 parts of leveling agent; 0.05 parts of defoaming agent. The invention can be applied to the improvement of the temperature resistance of multi-system water-based coatings. By adding an appropriate amount of modified silicone resin, the temperature resistance value tested by the molding method is significantly improved by 10-30°C compared with the coating without adding it, and the The added amount will not cause compatibility problems.

The invention relates to a synthesizing method of a tetrahydroquinoline derivative. Specifically, a Lewis acid SnCl2 and an oxidant are subjected to an oxidation reduction reaction; a produced oxidation product SnCl4 assists in in-situ promotion of an aza-Diels-Alder cycloaddition reaction of aniline, aldehyde and olefin, such that a 1,2,3,4-tetrahydroquinoline derivative is obtained. With the method, aliphatic aldehyde successfully participates in the reaction, and a range of aldehyde substrates in Povarov reactions is expanded. An accelerant is the combination of SnCl2 and the oxidant. Compared with a method for directly using SnCl4 or other Lewis acid accelerant, with the method provided by the invention, the synthesis of the 1,2,3,4-tetrahydroquinoline derivative has the advantages of cheap price, simple operation, mild reaction conditions, low corrosion, and high yield of prepared 1,2,3,4-tetrahydroquinoline derivative.

The invention discloses an environment-friendly waterborne coating for buildings and a preparation method of the environment-friendly waterborne coating. The environment-friendly waterborne coating is prepared from 25-35 parts of a water-soluble acrylate polymer, 20-30 parts of light calcium carbonate, 18-25 parts of talcum powder, 10-15 parts of sodium silicate, 15-20 parts of heavy calcium carbonate powder, 10-15 parts of titanium dioxide, 15-25 parts of emulsified epoxy resin, 2-4 parts of a plasticizer, 5-8 parts of auxiliaries, 3-6 parts of a curing agent, 4-6 parts of a defoaming agent, 2-5 parts of a leveling agent and 15-25 parts of water. The obtained waterborne coating is non-toxic, pollution-free and environment-friendly; the adhesive force is 0-level, and the environment-friendly waterborne coating is not prone to falling off, is high in corrosion resistance and shock strength and has good covering power and good comprehensive performance; the production technology is simple, the use range is wide, the cost is low, and industrial production is facilitated.

The invention relates to a C-aryl glycoside compound and a synthesis method thereof. A structural formula of the compound is shown in the description, wherein R is H, acetyl, methyl formate group, NHBoc or 4-methoxy; basic reaction takes glycosyl bromide and aryl iodine (bromine) as a substrate, and reaction is gently performed for 6-12 hours under icy-water bath or normal temperature under actions of a catalyst, a ligand, a reducer and an additive, so that the C-aryl glycoside compound is obtained. The catalyst metal is relatively cheap, raw materials are simple and easily available, the reaction is moderate, one-step reaction is performed, steps are simple, operations are safe, and the yield is relatively high, so that stereoselectivity is relatively good.

The invention discloses a preparation method of chitosan modified starch impregnating compound. The preparation method is characterized in that the preparation method comprises the following steps: taking 9-18 parts by mass of raw starch to a reaction container, and adding 300 parts by mass of water; stirring and raising temperature to 90 DEG C; pasting for 1 hour and obtaining starch paste; taking 1-3 parts by mass of chitosan in the starch paste, and orderly adding 0.1-0.6 parts by mass of cross-linking agent, 0.1-0.6 parts by weight of plasticizer, 0.2 parts by weight of polyving akohol, 0.2 parts by weight of sodium sulfate and 0.1 parts by weight of Twain 60 under the condition of stirring, and obtaining a mixture; reacting the mixture at 90 DEG C for 1-5 hours, cooling to room temperature, and placing for 2 hours; defoaming, and obtaining the chitosan modified starch impregnating compound. By adopting the preparation method of the chitosan modified starch impregnating compound, the technique is simple and cost is low; the product can be directly applied to wiredrawing production of glass fiber tank furnace, glass fiber textile processing, and other domains; the using effect is good.

The invention discloses a method for constructing N-2-aryl-substituted-1,2,3-triazole and belongs to the field of synthesis of pharmaceutical and chemical materials. The method comprises steps as follows: ketoxime ester, aryl diazonium salt, alkali, a copper salt catalyst and a solvent are added to a reactor and are stirred and react for 12-24 h at the temperature of 70-90 DEG C, a product is cooled to the room temperature after the reaction, water and ethyl acetate are added for extraction of a reaction liquid, the solvent is removed through reduced-pressure evaporation, a crude product is obtained and subjected to column chromatography purification, and a N-2-aryl-substituted-1,2,3-triazole compound is obtained. According to the method, the used raw materials are non-toxic, air-stable, cheap and available, and unstable, easily explosive and dangerous azides are not used; the N-2-aryl-substituted-1,2,3-triazole compound is high in reaction selectivity, good in functional group adaptability, wide in substrate adaption range and high in product yield. The synthesis method is simple to operate and safe, adopts mild reaction conditions, is insensitive to water and air and has good industrial application prospect, and enlarged production to gram scale can be realized.

The invention provides a group of novel compound fluorescent materials and a preparation method thereof. Each compound fluorescent material is composed of a main phase and a second phase, wherein the main phase is coordinated by taking nitrogen as an anion and takes rare earth as an active ion, and the second phase is of nitrogen inert metal simple substances such as Co, Rh, Ir, Cu, Au, Ag, Ni, Pd, Pt, Ru, Os and Zn. Low phonon energy nitrogen inert metal simple substance is distributed in a main phase crystal domain or on a crystal domain boundary in a fluorescence main phase crystal domain structure in the form of a second phase micro crystal domain, so that the luminescent intensity and the heat decay resistance of the fluorescent phase are improved. The compound fluorescent material is prepared by using the calcium cyanamide thermal reduction nitridation reaction process which takes the particles of the nitrogen inert metal simple substances as seed crystals, can be excited by UV-blue-green light to obtain red light or green-orange light emission, and can be used for manufacturing high-efficiency LED devices.

The invention relates to the technical field of rare earth separation, in particular to a preparation method for obtaining high-purity praseodymium oxide and neodymium oxide through single-factor separation of a praseodymium-neodymium enriched product. The preparation method comprises the following steps: dissolving light rare earth of lanthanum, cerium, praseodymium and neodymium into hydrochloric acid; after impurities are removed, mixing and adding a feed liquid and an organic phase into an extraction tank, introducing a water phase into the extraction tank in the opposite direction, carrying out an extraction reaction, collecting a Pr and Nd rare earth organic phase, and obtaining a praseodymium-neodymium organic phase enriched product; adding qualified praseodymium and neodymium products, adjusting the contents of praseodymium and neodymium, and stabilizing the mass ratio of praseodymium; and mixing the adjusted praseodymium-neodymium enriched product serving as a raw material with an organic phase, adding the mixture into an extraction tank, and performing single-factor separation to obtain high-purity praseodymium oxide and neodymium oxide. The method provided by the invention can ensure that the praseodymium and neodymium obtained by single-factor separation are high in purity and contain few impurities. Moreover, large-batch production of praseodymium and neodymium products is facilitated, and the product quality is very stable.

The invention discloses rice cake premix flour. The flour is characterized by comprising raw materials in parts by weight as follows: 150-250 parts of rice flour, 100-150 parts of low gluten wheat flour, 10-20 parts of yam flour, 10-15 parts of cyclodextrin, 20-30 parts of sweet potato starch, 5-10 parts of adonitol, 5-10 parts of lactitol, 3-8 parts of hawthorn flour, 5-10 parts of barley grass flour, 5-10 parts of barley leaf flour and 20-40 parts of ingredients. The invention further discloses a preparation method of the rice cake premix flour and rice cake prepared by the rice cake premixflour. The rice cake premix flour is high in nutritive value and good in taste, rice cake premix flour is simple, convenient and safe to prepare the rice cake, success rate is high, and the prepared rice cake has the advantages of soft and delicate taste.