34results about How to "Mild reaction" patented technology

The invention relates to a method for synthesizing benfotiamine, in particular to a process for synthesizing benfotiamine which is an anti-diabetic medicament by the phosphorylation of thiamine which severs as the raw material, the opening of the thiazole ring and the reaction of multiple steps. Benfotiamine is subjected to phosphorylation under the control of appropriate temperature and other conditions in a short time by taking phosphorus oxychloride as a phosphorylation reagent to obtain monophosphothiamine, and finally the steps of ring opening and benzoylation are carried out to obtain benfotiamine. The process has the advantages of high conversion rate of raw materials, low-cost, high product purity and greatly reduced production cycle and is suitable for industrial production.

The invention relates to substituted delta-lactones as well as to processes for synthesizing them, e.g., using fatty acids as starting material.

The invention discloses a synthesis process of a dimido dipheny compound. The synthesis process disclosed by the invention comprises the following steps: by taking benzene(I) as a raw material, carrying out continuous nitration on a micro reactor platform to obtain a mixed nitrobenzene compound (II); then obtaining a mixed diaminobenzene compound (III) by carrying out catalytic hydrogenation reduction under a mild condition with temperature of 50~70 DEG C and hydrogen gas pressure not higher than 1.0MPa; and purifying to obtain o-phenylenediamine, p-phenylenediamine and m-phenylenediamine. The synthesis process disclosed by the invention has the benefits that: the use level of nitric acid is low, so that the waste acid is easy to concentrate and apply mechanically; the heat release is less, the product dinitrobenzene compound (II) is quickly transferred, the reaction phenomenon is stable without intense heat release and even punch of a common autoclave nitration reaction, so that the safety of nitration reaction is improved; the rate in nitrification reaction is fast, and the energy consumption is reduced; the reaction phenomenon is stable, so that the safety of catalytic hydrogenation reduction reaction is improved; the synthesis process is a new technique which is high in safety, easy to industrialize and less in environment protection.

The process of recovering chromium from waste electric deposition solution includes adding concentrated sulfuric acid and hydrazine hydrate in certain amount into waste electric deposition solution at 28-32 deg.c to reduce six-valent chromium into trivalent chromium; depositing trivalent chromium with concentrated ammonia water; filtering and washing the precipitate; adding sulfuric acid to dissolve the precipitate, evaporation and stoving to obtain Cr2(SO4)3 crystal. The process has chromium recovering rate over 95 %, and has mild condition, fast speed and no harmful gas produced.

The invention provides an alkane sensing material, a preparation method and a use method. The alkane sensing material is formed by hybrid inlaying of amino and FeS nanoparticles. The alkane sensing material has a structural general formula shown as the specification, wherein R1, R2 and R3 are group containing a structure shown as the specification, and n is a positive integer of not less than 40. A series of experimental results show that the alkane sensing material provided by the invention has characteristic sensing properties to alkane.

This invention provides a high-yield bacterial strain for producing tetramethylpyrazine named Bacillus pumilus RX3-17. The strain has been deposited in China Center for Type Culture Collection on Apr. 19, 2006. The deposit number is CCTCC M 206043. The bacterial strain, isolated from soil, is rod-shaped, 1.5 μm to 3.0 μm in length and 0.6 μm to 0.7 μm in diameter. The colony color of the strain is milky-white. The strain has typical physiological and biochemical characteristics of Bacillus pumilus. The 16s rDNA sequence of this strain shares a similarity of 99% with other Bacillus pumilus strains. This invention belongs to the domain of biotechnology. The strain can be applied to the production of tetramethylpyrazine with glucose as the substrate, solving the bottleneck of low yield in bacterial tetramethylpyrazine fermentation.

The invention discloses a low-acrylamide deep-fried fish fillet wrapped with paste and a processing method thereof. The processing method comprises the steps of fishy smell elimination, curing, preparation of wrapping paste, paste wrapping, drying and deep-frying. The content of acrylamide in the deep-fried wrapping paste fish fillet is obviously lowered and decreased to 40.99 microgram/kilogram from 89.67 microgram/kilogram; the content of oils and fats in the deep-fried fish fillet wrapped with paste is obviously lowered and decreased to 16.61% from 28.05%; the deep-fried fish fillet wrappedwith paste has the specific flavor of deep-fried food and is golden yellow in color and crispy on the outside and soft on the inside in taste. Meanwhile, the production technology is easy and efficient.

The invention relates to an organic polyspiralgrid nanopolymer material and a preparation method thereof, and belongs to the field of nanotechnology and organic electronics. The structure of the organic polyspiralgrid nanopolymer material is composed of grids containing a spiro ring that serves as a repeat unit to form a special nano polymer, and the structure shares the spiro ring structure. A synthetic method thereof relates to a synthon containing the spiro ring, and by means of a Friedel-Crafts reaction, an organic spirogrid and a nano polymer thereof are built. By means of reasonable molecular design and the Friedel-Crafts reaction with the advantages of being mild in reaction condition, high in yield, high in selectivity, simple in posttreatment, green, free of toxicity and the like, the problems that a traditional polymer molecule is complex in synthesis step, toxic in posttreatment, large in pollution and the like are solved.

The invention belongs to a lithium battery positive electrode, and a preparation method and the application thereof, and belongs to the technical field of manufacturing of a lithium battery. Accordingto the lithium battery positive electrode, and the preparation method and application thereof, the defects in the prior art are overcome. The invention aims to provide the lithium battery positive electrode, and the preparation method and application thereof. According to the scheme, the lithium battery positive electrode comprises a positive electrode current collector, an adhesive, a positive electrode powder and conductive carbon black, and is characterized in that at least one surface of the positive electrode current collector is coated with a composite layer formed by the adhesive, thepositive electrode powder and the conductive carbon black; the positive electrode powder is a ternary material or lithium iron phosphate or lithium cobaltate; the positive electrode current collectoris a microporous aluminum foil; 1000 to 1500 through holes with the diameter of 10 to 50 um and/or 1000 to 3000 blind holes with the diameter of 10 to 50 um are distributed in per centimeter of the microporous aluminum foil; the lithium battery positive electrode can be applied to the lithium battery.

The invention discloses an aluminum foil for a lithium ion battery, a micro-porous aluminum foil, and a preparation method of the micro-porous aluminum foil. The aluminum foil comprises 0.05-0.07 wt%of Mg, 0.08 wt% or less of Si, 0.2 wt% or less of Fe, 0.03 wt% or less of Ga, 0.04 wt% or less of Cu, 0.04 wt% or less of Zn, 0.05 wt% or less of V, 0.03 wt% or less of Ti and 99.7 wt% of aluminum. The micro-porous aluminum foil is prepared through adopting a chemical corrosion technology; 300-6000 through holes and/or blind holes with the diameter being 6-12 [mu]m are distributed in per square centimeter of the micro-porous aluminum foil; and a defined component composition has a higher yield strength than existing series of aluminum alloys, and makes formed micro-pores have small and uniformapertures in the subsequent chemical corrosion process, and each of through holes and the blind holes is in circular arc transition with a material body, so the stress concentration is reduced, mechanical properties are enhanced, electrical properties are not weakened, and the micro-porous aluminum foil can be applied to the lithium battery.

The present invention discloses novel methods for synthesizing Rivaroxaban intermediate, i.e., 4-{4-[(5S)-5-(aminomethyl)-2-oxo-1,3 -oxazolidin-3 -yl]phenyl}morpholin-3-one. The novel methods provided in the present invention involve mild reaction conditions, convenient operations, easy purification, and low production costs, and thus the process is environmental-friendly and suitable for industrial production.

A process of producing oxalate by CO gas phase method includes the following steps: a) introducing nitrite salt, water and an inorganic acid first into a reactor I to produce a NO containing effluent I; and separating the resultant effluent to obtain the effluent II of NO; b) introducing the effluent II of NO, a C₁-C₄ alkanol and oxygen into a reactor II to be subjected to the reaction, and separating the resultant effluent to obtain the effluent IV of C₁-C₄ alkyl nitrites; c) introducing the effluent IV of C₁-C₄ alkyl nitrites and a CO gas stream into a coupling reactor where they are reacted to produce a NO containing effluent VI. The reactor I and/or the reactor II are preferably rotating supergravity reactors. Therefore, the process is applicable to the industrial production of oxalate by CO gas phase method.

The purpose is to produce a molded filter body using graphene having water passage holes with a desired size by an easy process.

A method for producing a molded filter body having a layer of graphene 2 as a filter medium, includes the steps of: forming a layer of a support 5 on a surface of graphite 1; forming support water passage holes in the layer of the support 5; peeling the layer of the support 5 from the graphite 1 in a state of attaching the layer of graphene 2 on the surface of the graphite 1 to the layer of the support 5; and holding the layer of graphene 2 by heating at a low temperature for a predetermined time in the air containing oxygen at 160 to 250° C. and forming graphene water passage holes.

The present invention discloses a method for preparing aldehydes or ketones via aerobic oxidation of alcohols with the copper salts and nitroxide radicals as catalysts. Both oxygen and air could be used as oxidants, after 4 to 48 hours of reaction in an organic solvent at room temperature, the alcohols are efficiently oxidized to the corresponding aldehydes or ketones. The present invention has the following advantages: easy to operate, refraining from using chlorides which are corrosive to equipment, readily available raw materials and reagents, mils reaction conditions, the broad substrate scope, good functional group tolerance, convenient purification, environmentally friendly and no pollution. Thus, the method is suitable for industrial production.

The invention belongs to the field of bioengineering and food technology, and discloses a method for enzymatic resolution of chiral substances, including the following steps: (1) preparing an enzyme solution with a lipase concentration of 1-3000 U/mL, and adding a soluble salt, a hydrophilic solvent and a hydrophobic solvent to the enzyme solution to form a three-liquid phase system; the hydrophobic solvent contains esters or amide compounds composed of racemic chiral compounds; (2) subjecting the three-liquid phase system to enzyme-catalyzed reaction under stirring condition; after the reaction is completed, standing or centrifuging the three-liquid phase system to divide it into three layers, which are a upper liquid layer, a middle liquid layer and a lower liquid layer from top to bottom. The optically pure chiral product after hydrolysis is mainly rich in the middle liquid layer or the lower liquid layer, while the upper liquid layer product is another ester or amide product containing an optically pure chiral product. The method has the advantages of low energy consumption, high raw material utilization rate, and mild reaction conditions, and solves the problems of low chiral resolution efficiency, poor chiral selectivity, low recovery rate, and difficulty in industrialization in the existing enzymatic method.