10results about How to "Low raw material requirement" patented technology

The invention provides a lithium iron phosphate positive electrode material, a preparation method thereof and an electrochemical device, and the preparation method comprises the following steps: adding a first carbon source, a lithium source, an iron source and a phosphorus source into water, and carrying out first sanding to obtain a first mixture; carrying out spray drying treatment on the first mixture, and sintering in inert gas to obtain a precursor; mixing the precursor, a second carbon source and water to obtain a second mixture; sanding the second mixture for the second time, and dividing the second mixture into a first slurry and a second slurry when the particle size D50 of the second mixture is 1.0-2.0 [mu] m; carrying out third sanding on the second slurry, wherein the particle size D50 of the sanded second slurry is 0.2-0.3 [mu] m; mixing the first slurry and the second slurry subjected to third sanding to obtain mixed slurry; and carrying out spray drying treatment on the mixed slurry, and sintering in inert gas to obtain the lithium iron phosphate positive electrode material. According to the preparation method of the lithium iron phosphate positive electrode material provided by the invention, the compaction density and the electrical property of the lithium iron phosphate positive electrode material can be improved.

The invention discloses a method for delaying aging and retrogradation of refrigerated rice by combining a cooking-prior-to-steaming process with a magnetic field, and belongs to the technical field of food processing. The method comprises the following steps; treating the raw materials, boiling, steaming, and refrigerating with assistance of a magnetic field. According to the method, a certain amount of starch is washed away through a cooking process, water is promoted to permeate into rice grains to participate in starch gelatinization, finished rice with fluffy rice grains and tender taste is obtained through a steaming process, and the retrogradation and rearrangement process of rice starch molecules in the refrigeration process is delayed through magnetic field assisted refrigeration. The cooking and steaming process is combined with the magnetic field to assist refrigeration for cooperative treatment, and aging and retrogradation of the rice in the refrigeration process can be effectively delayed. The method disclosed by the invention is simple in process, and the prepared rice has lower retrogradation degree under the same storage condition, and has the advantages of low hardness, good viscosity, better taste quality and longer shelf life.

The invention discloses a microbial activation method and application of sintered brick slag powder, relates to the technical field of resource recycling of building solid wastes, and aims to solve the problems of large composition difference, poor performance, low utilization rate and the like of the sintered brick slag powder. According to the microbial activation method for the sintered brick slag powder, the sintered brick slag powder is activated by adopting AS1.232 bacillus mucilaginosus, so that solubilizing activation treatment is carried out, and the sintered brick slag powder subjected to microbial activation can be used as a substitute of a common active admixture, an admixture and the like; and an efficient and low-carbon regeneration application technical approach is provided for the sintered brick slag powder.

The invention discloses a separation process and application of novel dipeptide Flolutsin C with anti-liver injury activity in Chaetotrichum luteo-virens. The specific method comprises the following seven steps: extraction, QuikSep PS medium-pressure chromatography coarse separation, anti-liver injury active component preliminary screening, Megress C18 reversed-phase preparation column preparation, anti-liver injury active component re-screening, ACE Excel C18AR reversed-phase preparation column preparation and anti-liver injury in-vitro activity evaluation. A solvent and a separation material used in the process can be recycled, so that relatively low separation and preparation cost is ensured, and high-pressure preparative chromatographic separation can ensure that the purity of the product is greater than 95%; the activity screening method is simple, and the quality is stable and controllable; the experimental operation is simple, the cost is low, the quality is controllable, and the result is visual and easy to judge; the obtained anti-liver-injury active compound can be used for preparing anti-non-alcoholic fatty liver disease drugs. The preparation process provided by the invention can realize large-scale production.

The invention discloses a separation process and application of novel dipeptide Flolutsin B with anti-liver injury activity in Chaetotrichum luteo-virens. The specific method comprises the following seven steps: extraction, QuikSep PS medium-pressure chromatography coarse separation, anti-liver injury active component preliminary screening, Megress C18 reversed-phase preparation column preparation, anti-liver injury active component re-screening, ACE Excel C18AR reversed-phase preparation column preparation and anti-liver injury in-vitro activity evaluation. A solvent and a separation material used in the process can be recycled, so that relatively low separation and preparation cost is ensured, and high-pressure preparative chromatographic separation can ensure that the purity of the product is greater than 95%; the activity screening method is simple, and the quality is stable and controllable; the experimental operation is simple, the cost is low, the quality is controllable, and the result is visual and easy to judge; the obtained anti-liver-injury active compound can be used for preparing anti-non-alcoholic fatty liver disease drugs. The preparation process provided by the invention can realize large-scale production.

The present invention provides a method for preparing high-elastic spandex by recycling polyester and the prepared high-elastic spandex, the method comprising the following steps: 1) using PTA to react with a diol with a molecular weight less than 200 to prepare an aromatic polyester diol; 2) reacting the aromatic polyester diol prepared in step 1) with a diisocyanate to obtain a prepolymer; 3) extending the chain of the prepolymer to obtain a polyurethane polymer; 4) spinning the polyurethane polymer to obtain high-elastic spandex. The PTA can be recycled from polyester, and recycled materials are used, making the production process more environmentally friendly. At the same time, the introduction of aromatic rings increases the tensile modulus of the spandex, so that the spandex has better elasticity.

This invention discloses a method for producing high-purity (1R,2S,5R)-WS-3, comprising the following steps: using a mixture of menthol containing eight stereoisomers or naturally extracted menthol as raw material, and reacting it with diethylamine and phosgene under solvent-free conditions at 55-65°C; using a non-chiral adsorbent to separate six diastereomers of (1R,2S,5R)-WS-3 from the obtained WS-3 mixture, and then using a chiral adsorbent to separate the remaining two enantiomers, thus obtaining high-purity (1R,2S,5R)-WS-3. This invention achieves the production of high optical purity (1R,2S,5R)-WS-3 menthol amide cooling agent under mild operating conditions, and has significant industrial application value for the efficient production and quality upgrading of cooling agents.

The invention belongs to the technical field of preparation of epoxy compounds, and particularly discloses a preparation method of epoxy chloropropane. The method comprises the following steps: firstly, mixing a composite catalyst with glycerol, introducing the mixture into a four-stage tandem reaction kettle, introducing hydrogen chloride gas into the four-stage tandem reaction kettle, and carrying out chlorohydrination reaction to obtain dichloropropanol; the obtained dichloropropanol is rectified, the rectified dichloropropanol and lime milk are introduced into a cyclization reaction tower for cyclization reaction, and epoxy chloropropane and cyclization liquid are obtained; and carrying out post-treatment on the cyclized liquid to obtain calcium chloride. The invention discloses application of four stages of tandem reaction kettles, which improves the mass transfer effect among raw materials and is beneficial to sufficient reaction. The composite catalyst has excellent catalytic activity and dichloropropanol selectivity. For low-purity glycerol, the yield is relatively high; the invention also realizes the byproduct calcium chloride, and improves the economic benefit.

This invention provides a method for synthesizing novel natural pigments using phenotypic catechins. Various epicatechins, epigallocatechins, epicatechin gallate esters, and epigallocatechin gallate esters are used as substrates. These are mixed and subjected to a non-enzymatic oxidation reaction under humid and hot conditions to generate a new class of tea pigment compounds. The non-enzymatic oxidation products of the phenotypic catechins are then concentrated under reduced pressure, freeze-dried, extracted, and purified by column chromatography to obtain dimeric catechin pigments. The six novel dimeric catechin pigments obtained by this invention are synthesized using a simple method. The six novel dimeric catechin pigments obtained according to the method of this invention are orange-yellow or orange-red amorphous powders with good color-adjusting capabilities, and can be applied to coloring tea beverages and new-style tea drinks. The discovery of this type of natural pigment contributes to the research on coloring substances during the thermal processing of tea, the improvement of tea liquor color quality, and the development and application in the field of food coloring.

This invention provides a method for preparing high-elasticity spandex from recycled polyester and the resulting high-elasticity spandex. The method includes the following steps: 1) reacting DMT with a diol with a molecular weight less than 200 to obtain an aromatic polyester diol; 2) reacting the aromatic polyester diol obtained in step 1) with a diisocyanate to obtain a prepolymer; 3) chain-extending the prepolymer to obtain a polyurethane polymer; 4) spinning the polyurethane polymer to obtain high-elasticity spandex. The DMT can be obtained from recycled polyester. This invention uses recycled polyester to prepare DMT, eliminating the need to convert DMT to PTA. The direct reaction of DMT with a diol to prepare the polyester diol makes the reaction conditions for the aromatic polyester diol milder, saves the step of converting DMT to PTA, utilizes recycled materials, and makes the production process more environmentally friendly. Simultaneously, the introduction of aromatic rings increases the tensile modulus of the spandex, giving it better elasticity.