332results about How to "Improve reaction efficiency" patented technology

Process for preparing diglyceride by enzyme method in organic medium system

The invention relates to an enzymatic process to prepare the diglyceride from an organic medium system, belonging to the vegetable oil synthesis field, which is characterized in that a short chain alcohol and lipid with the molar ratio of the alcohol ester being 0.5:1 to 2:1, an organic solvent taking over 20% to 300% of lipid volume, and an immobilization lipase with dry weight taking over 0.5% to 20% of the lipid mass are filled into a conical flask with a plug and are stirred evenly, the conical flask positioned in an automatic temperature controlled reciprocating shaker is heated up to 20 to 60 degree centigrade and reacted for 1 to 48 hours, then the oil material is transformed into the diglyceride and two secondary products the monoglyceride and the fatty acid short chain alcohol ester; the products are distilled to remove the organic solvent, the diglyceride is made after the reduced pressure distillation and the molecular distillation, and meanwhile the secondary product fatty acid short alcohol ester is produced. The enzymatic process to prepare the diglyceride from an organic medium system has the advantages of perfectly solving the problem of big viscosity of the reaction substrate during the process of producing diglyceride by means of the biological enzyme, effectively lowering the negative influence of the short chain alcohol on the enzyme reactivity, and significantly increasing the reaction efficiency.

Chemical reaction device, chemical reaction system and chemical reaction method

A chemical reaction device is provided for a chemical reaction between molecules immobilized on a solid phase and molecules in a solution, and a chemical analysis device is also provided to capture molecules in the solution by molecules immobilized on the solid phase through a chemical reaction and subsequent measurement of the captured molecules. Reaction efficiency as well as sample throughput are thereby improved. The chemical reaction device and the chemical analysis device use a channel of a microfluidic device for a reaction vessel, and at least a particular molecule is immobilized on an interior surface and a fixed structure or a non-fixed obstacle against a flow is provided in the channel. In a typical reaction vessel having an enzyme immobilized on an interior surface of a capillary and glass beads functioning as an obstacle for the flow filled in the channel of the capillary, a reaction solution can move either in one direction or back and forth in two directions to thereby undergo a reaction with the enzyme immobilized on the interior surface. The flow of the reaction solution is not a laminar flow so that a reaction between the particular molecule immobilized and the reaction solution proceeds at high efficiency.

High cis-1,4 content epoxy hydroxyl-terminated polybutadiene liquid rubber and preparation method thereof

ActiveCN104448059AImprove reaction efficiencySimple processHydroxyl-terminated polybutadieneAldehyde
The invention discloses high cis-1,4 content epoxy hydroxyl-terminated polybutadiene liquid rubber and a preparation method thereof. The method comprises the following steps: (1) preparing epoxy butadiene rubber from butadiene rubber; (2) preparing high cis-1,4 content epoxy aldehyde-terminated polybutadiene liquid rubber; (3) preparing high cis-1,4 content epoxy aldehyde-terminated polybutadiene liquid rubber by using a one-pot method; and (4) performing reduction preparation, thereby obtaining high cis-1,4 content epoxy hydroxyl-terminated polybutadiene liquid rubber. According to the preparation method, the high cis-1,4 content epoxy hydroxyl-terminated polybutadiene liquid rubber is prepared from butadiene rubber, the content of cis-1,4 can be up to 70.0-98.0%, the epoxy rate can be within 1-30%, the number-average molecular weight can be within 2000-13000g/mol, the molecular weight distribution is within 1.2-3.0, and the functionality degree is within 1.9-2.2. Under the background that the butadiene rubber supply is beyond the requirements and the petroleum resources are short day by day, the preparation of high cis-1,4 content epoxy hydroxyl-terminated polybutadiene liquid rubber from butadiene rubber by using an oxidation cracking method has very significant practical meanings.

Preparation method for cassava starch modified by combining three kinds of modification processes

ActiveCN104031295AImprove reaction efficiencyImprove the uniformity of the reactionFibre treatmentPaper coatingWater contentChemistry
A disclosed preparation method for cassava starch modified by combining three kinds of modification processes is characterized by comprising: taking starch as a raw material, employing a wet-process crosslinking-oxidation-esterification chemical modification technological route, specifically, performing a crosslinking reaction and an oxidation reaction on an active starch slurry at the same time, then adding a pretreated composite esterification reagent to perform esterification reaction, and adjusting the pH value of the starch slurry to 5.0-6.5, so as to finish combined modification of cassava starch, filtering to obtain wet starch with the water content of 35% or less, then adding polyethylene glycol, mixing uniformly, and performing drying, cooling, crushing and sieving, so as to obtain the cassava starch modified by combining three kinds of modification processes. Only one time of post-processing process comprising washing, centrifugation, drying and the like is performed, the technological process is continuous and automatic, energy and reaction time are saved; and the product is low in gelatinization temperature, good in formability, improved in permeability, caking property, film forming ability and anti-ageing property, and is suitable for being used as a coating adhesive and a surface sizing agent in papermaking industry, a sizing agent in weaving industry, an industrial binder and the like.

Selfheal polysaccharide zinc chelate as well as preparation method and application thereof to anti-cancer drug

The invention discloses a selfheal polysaccharide zinc chelate as well as a preparation method and application thereof to an anti-cancer drug. The method comprises the following steps: crushing selfheal clusters, decolorizing by use of ethanol, adding distilled water, performing reflux extraction, deproteinizing the extracting solution, performing ultrafiltration, and freeze-drying the retained liquid to obtain polysaccharide; preparing a polysaccharide solution of which the concentration is 10 mg/mL to 40 mg/mL, heating to the temperature of 40-60 DEG C, regulating pH by using sodium hydroxide, slowly adding a zinc salt solution into the polysaccharide solution, reacting for 6-24 hours, simultaneously performing an discontinuous homogenization process by using a high-shear homogenizer, regulating the pH by using hydrochloric acid, centrifuging to obtain supernatant liquor, putting the supernatant liquor into a dialysis bag for dialysis, collecting the solution in the dialysis bag, and performing freeze-drying to obtain the selfheal polysaccharide zinc chelate. The product disclosed by the invention is simple and easy to implement in preparation method, has a remarkable anti-proliferation effect on human cancer cells and also causes no cytotoxicity to normal cells of the human body, so the selfheal polysaccharide zinc chelate is an ideal anti-cancer drug or a health care product and also has a zinc replenishment effect.

SCR system automatic control method based on ammonia spraying sensitive valve locking

The present invention discloses a SCR system automatic control method based on ammonia spraying sensitive valve locking. The method comprises three steps: firstly, performing comprehensive analysis of varying load condition operation characteristics of the SCR system based on a field test and a CFD numerical simulation technology to obtain flue gas 'NOx flow' regional continuous distribution characteristics matching an AIG type; then determining the weight of each ammonia spraying branch pipe valve, locking a certain number of sensitive valves according to a preset sensitive valve locking principle, and installing an automatic regulating valve at a corresponding ammonia spraying region; finally, developing an ammonia spraying logic controller and corresponding main control and sub-control logics, realizing multistage optimization setting of parameters of the control system, and realizing the accurate automatic control of the main ammonia spraying regulating valve of the SCR system and the locking sensitive valves. The SCR system automatic control method based on ammonia spraying sensitive valve locking is able to overcome the problems of characteristics of the SCR system such as nonlinearity, large delay and the like so as to realize the accurate automatic control of the ammonia spraying of the SCR system, substantially enhance the SCR denitration reaction efficiency, save the dosage of ammonia, reduce the ammonia escape and effectively inhibit the generation of ABS.

Method for extracting manganese from composite manganese ore composed of multiple phases containing manganese

The invention discloses a method for extracting manganese from composite manganese ore composed of multiple phases containing manganese. The method provides a new technology for processing novel manganese resources. The method includes the specific steps that the composite manganese ore is smashed and ground, and composite manganese concentrate is obtained through a magnetic separation method; then the composite manganese concentrate is placed in a roasting device, roasting temperature ranges from 200 DEG C to 600 DEG C, roasting time ranges from 1h to 4h, an obtained roasted product is leached through sulfuric acid, the weight ratio of added sulfuric acid to the roasted product is 2-10 to 1, leaching temperature ranges from 30 DEG C to 100 DEG C, leaching time is 30-240 min, filtering is carried out, the leached liquid is deironized, then sodium fluoride is added to remove calcium and magnesium, then co-precipitation is carried out for further impurity removal, the obtained filtered liquid is conveyed into an electrolytic cell to be electrolyzed, and an electrolytic metal manganese product is obtained. The method has the advantages of being high in reaction efficiency, high in speed, capable of reducing energy consumption and saving resources, high in product recovery rate and environmentally friendly.

Technology for preparing vitamin D3

The invention discloses a technology for preparing vitamin D3. The technology comprises the following steps of: (1) preparing a 1wt%-3wt% 7-dehydrocholesterol solution, and passing the 7-dehydrocholesterol solution through a photochemical reactor filled with nitrogen for carrying out photochemical reaction, wherein the reaction temperature is controlled within the range of 35-50 DEG C and the conversion rate is controlled within the range of 10-20%; collecting a photochemical reaction liquid, recovering 70-80% of solvent, centrifuging and recovering the 7-dehydrocholesterol, and crystallizing and filtering filtrate, and recovering the solvent from the filtrate to obtain vitamin P3 mixture; (2) dissolving the vitamin P3 mixture into an adsorption solvent, and carrying out column chromatography separation to obtain vitamin P3 component; and (3) carrying out thermal isomerization reaction on the vitamin P3 component, basically converting the vitamin P3 into the vitamin D3, then freezing and crystallizing to obtain the vitamin D3 crystal. The technology is simple in technical process, large in handling capacity, low in toxicity and environmental pollution and high in yield, thus the technology is used for preparing the vitamin D3 pure product which is in accordance with the requirements of pharmacopeia.

Kieselguhr-based ferric carbon ceramsite packing and preparation method thereof

The invention discloses kieselguhr-based ferric carbon ceramsite packing. The kieselguhr-based ferric carbon ceramsite packing consists of scrap iron, activated carbon powder, kieselguhr, ammonium sulfate and a starch solution. The invention further particularly discloses a preparation method of ceramsite packing. The preparation method comprises the following steps: uniformly mixing the scrap iron, the activated carbon powder, the kieselguhr, ammonium sulfate and the starch solution; pressing the mixture into a mud cake; and then pelleting and firing to obtain the final product. The kieselguhr is used as the base material of the scrap iron and the activated carbon powder, after pelleting, the kieselguhr, the scrap iron and the activated carbon powder are fused integrally by high-temperature firing, under the effects of starch as an enhancer and ammonium sulfate as a pore-forming agent, spherical ceramsite which is high in strength and has a plurality of pores inside is formed, the problems of adhesion of the scrap iron and uneven distribution of iron and carbon are solved, the shortcoming of hardening and passivation of traditional iron and carbon micro-electrolysis packing can be overcome, micro-electrolysis reaction efficiency is improved, furthermore, operation of packing supplementing can be simplified, and labor intensity is reduced.
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