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3396 results about "Organic synthesis" patented technology

Organic synthesis is a special branch of chemical synthesis and is concerned with the intentional construction of organic compounds. Organic molecules are often more complex than inorganic compounds, and their synthesis has developed into one of the most important branches of organic chemistry. There are several main areas of research within the general area of organic synthesis: total synthesis, semisynthesis, and methodology.

Filter material, method for the production thereof, a filter and filtering method

ActiveUS20080164214A1High propertyLow hydrodynamic resistanceOther chemical processesLayered productsFiberRetention efficiency
The invention concerns the production of filter materials for the purification and disinfection of water, water solutions and other liquids, as well as for sterilizing filtration of injections and other solutions, for concentration of biomolecules in physiological liquids, concentration and extraction of viruses, preparation of apyrogenic water, in biocatalytic diaphragm reactors. The invention solves the problems of a new filter material production, characterized by high sorption properties, high retention efficiency of submicron electronegative particles, microorganisms, submicron non-polar particles and chemical contaminations, and, at the same time, characterized by low hydrodynamic resistance. A base of filter material is the nonwoven organic synthetic polymeric fabric, modified by the aluminum hydroxide particles, fixed to the surface of base fibers for improvement of its sorption properties and for making it positively charged. A method of filter material production comprises: applying the modifying composition onto the fibrous base in the form of organic nonwoven synthetic polymeric fabric, wherein said modifying composition comprises the particles of the aluminum-based material, hydrolysis thereof results to formation and fixation of the aluminum hydroxide particles to the base fibers. A method of fluid filtration is carried out using the filter material as a non-woven organic synthetic polymeric fabric, to the fibers of which the aluminum hydroxide particles are fixed.

High-entropy alloy for sewage degradation and preparing method thereof

ActiveCN105088048ARaise the ratioStrong degradation efficiencyWater/sewage treatmentIron powderHigh entropy alloys
The invention discloses high-entropy alloy for sewage degradation and a preparing method thereof. The high-entropy alloy at least comprises four components and at least comprises one active metallic element which is Mg, Ca or Zn, and the components are matched based on an equi-atomic ratio or approximate-equi-atomic ratio. The high-entropy alloy is prepared through mechanical alloying. The technology is simple, smelting is not needed, and preparing cost is low. The high-entropy alloy is different from ordinary high-entropy alloy systems in that a dinitrogen bond is broken through redox reaction between the active zero-valent metallic element and the -N=N- perssad in organic synthetic dyestuff, so that a high rate is realized for azo dyestuff and a remarkable effect is realized for degradation of materials similar to organic synthetic dyestuff, and degradation efficiency is improved by over 250 times compared with commercial iron powder which is in common use currently. The composition range of the high-entropy alloy is wide, and appropriate composition adjustment can be conducted according to actual needs. Meanwhile, the high-entropy alloy is high in structural stability and suitable for various working environments and has broad industrial application prospects in sewage treatment.

Synthetic method of 5, 5'-bistetrazole-1, 1'-dioxo hydroxyl ammonium salt (TKX-50)

InactiveCN103524444AAvoid purification processEasy to operateOrganic chemistryFiltrationOrganic synthesis
The invention provides a method for preparing 5, 5'-bistetrazole-1, 1'-dioxo hydroxyl ammonium salt (TKX-50), and belongs to the technical field of organic synthesis. The method comprises the steps as follows: step one, glyoxime is prepared, and the yield is 62%; step two, a product obtained in the step one is dissolved in water and concentrated hydrochloric acid, chlorine is introduced at the temperature of 0 DEG C for a reaction for a period of time, and dichloroglyoxime is obtained; and finally, a product obtained in the step two is dissolved in a solvent, and the product and sodium azide have a reaction at the temperature of 0 DEG C for a period of time; after that, the mixture is transferred into diethy ether, and sealed for a reaction at the room temperature overnight after HCl is introduced for a period of time; and after diethyl ether and most HCl gas are volatilized, pH of an aqueous NaOH solution is regulated to be about 8, reflux cooling is performed, filtered and separated solids are dissolved in hydroxylamine hydrochloride to have a reaction for a period of time, and TKX-50 is obtained. According to the method, glyoxal is adopted as a raw material, water is adopted as a solvent for preparation of dichloroglyoxime in the step two, and only direct filtration is required in postprocessing, so that the tedious purification process is prevented, and the cost is reduced; and besides, a target product TKX-50 is synthetized through three steps of reactions, the total yield is up to 34%, the reaction condition is mild, the operation is simple and convenient, and the industrialization is easy to realize.

Continuous preparation method for preparing hexamethoxyl methyl melamine resin through continuous process

The invention discloses a preparation method for preparing hexamethoxyl methyl melamine resin through a continuous process, and belongs to the field of organic synthesis. The preparation method comprises the following steps: 1) carrying out continuous reaction on melamine and a formaldehyde water solution by taking inorganic base as a catalyst to obtain hexahydroxy methyl melamine; 2) carrying out continuous vacuum drying on the hexahydroxy methyl melamine until the water content is less than 1%, and smashing; 3) regulating the pH of the hexahydroxy methyl melamine and methanol by use of an organic acid, and carrying out a continuous etherification reaction; 4) continuously distilling a product obtained from the etherification reaction, and removing impurities to obtain the hexamethoxyl methyl melamine resin (II). According to the process, the organic base is adopted for replacing a conventional inorganic base as a catalyst in hydroxymethylation, so that production is more stable, and melamine is used; the organic acid is used as a catalyst in esterification, which is beneficial to oxidation and neutralization in the later period of reaction. An oxidizing agent is adopted to terminate the esterification, so that the product is free from generation of solid salt and free from precipitation of solid after low-boiling-point substances are recovered, thus omitting solid and liquid separation.

Environmentally-friendly breeding of bacillus subtilis for producing 2,3-butanediol by fermentation with glucose substrate

2,3-BDO is important industrial chemicals and a medicinal precursor, for example, the 2,3-BDO can form 1,3-butadiene through dehydration and can be used for synthesizing rubber, polyester and polyurethane; the esterified 2,3-BDO is a precursor of synthetic polyimine, and can be applied to medicaments, cosmetics, washing liquor liquid and the like; and in addition, the 2,3-BDO can also be used as a flavor substance to be added into distilled spirit and cream. The 2,3-BDO can be prepared by a chemical synthesis method and a microorganism production method, and due to a special structure of 2,3-butanediol, in the chemical method for producing the 2,3-butanediol, the 2,3-butanediol is mainly prepared by hydrolyzing four-carbon hydrocarbon generated during the splitting decomposition of petroleum at the high temperature and under the high pressure and has the disadvantages of high cost, complicated processes and difficult operation, so the large-scale industrial production is difficult to realize all the time. With the increasing rise in oil price, people pay close attention to the production of the 2, 3-butanediol by using the microbial fermentation method and the developmental research of derivatives thereof gradually. The fermentation method for producing the 2,3-butanediol has the following advantages that: firstly, the fermentation method has the superiority in cost, and the chemical method has high production cost; secondly, the fermentation method has an environmental-friendly characteristic, and the 2,3-butanediol is used as an organic synthesis intermediate to occupy markets of a number of compounds and other petroleum chemicals, has wide prospect, obvious social and environmental benefits, and is particularly favorable for the extensive application of the products; and thirdly, in the fermentation method for producing the 2,3-butanediol, renewable resources are used as raw materials, so the fermentation method does not depend on the petroleum chemicals.

Metal-loaded magnetic carbon material catalyst and method for catalyzing dechlorination of chlorinated phenol through metal-loaded magnetic carbon material catalyst

InactiveCN104028283ASimple preparation processComplete catalytic degradationMetal/metal-oxides/metal-hydroxide catalystsChlorinated phenolsOrganic synthesis
The invention relates to a metal-loaded magnetic carbon material catalyst and a method for catalyzing dechlorination of chlorinated phenol through the metal-loaded magnetic carbon material catalyst, and belongs to the field of organic synthesis and catalytic reaction. The metal-loaded magnetic carbon material catalyst and the method for catalyzing dechlorination of the chlorinated phenol through the catalyst are provided. The metal-loaded magnetic carbon material catalyst is a compound obtained by loading Fe3O4 and active metal elements on a carbon material, wherein the carbon material is activated carbon or carbon nano tubes or graphene, and the active metal elements are one or two of platinum, palladium and rhodium. The preparation steps of the catalyst are simple, reduction is carried out simultaneously in the preparation process of the catalyst, and the reduction step is omitted. The catalyst has terrific hydrodechlorination performance on the chlorinated phenol and is used for dechlorination of the chlorinated phenol, reaction conditions are milder, no inorganic or organic additive is added to a reaction system, and the catalyst can be recycled.

Adhesion promoters and gel-modifiers for olefin metathesis compositions

This invention relates to compositions and methods for improving the adhesion of resin compositions to substrate materials, pre-treating substrate materials to improve the adhesion of resin compositions to the substrate materials, and/or controlling gel formation of resin compositions. More particularly, the invention relates to compositions and methods for improving the adhesion of ring opening metathesis polymerization (ROMP) compositions to substrate materials using adhesion promoters containing isocyariate groups in a resin composition. The invention also relates to methods for improving the adhesion of resin compositions to substrate materials by pre-treating substrate materials with adhesion promoters containing isocyanate groups. The invention further relates to a method of providing a gel-modified ROMP composition, in which a hydroperoxide is added to a ROMP polymerizable resin composition in order to control gel formation of the polymerizing resin. An improved ROMP composition is further disclosed, comprising a cyclic olefin, a ROMP metathesis catalyst, an adhesion promoter, and an added hydroperoxide gel modifier. The polymer products produced via ROMP reactions of the invention may be utilized for a wide range of materials and composite applications. The invention has utility in the fields of catalysis, organic synthesis, and polymer and materials chemistry and manufacture.

Preparation and characterization method of photosensitizer/antitumor drug self-assembled nano drug delivery system based on hyaluronic acid

The invention belongs to the field of organic synthesis or pharmaceutical preparations and relates to a synthesis method of a hyaluronic acid-photosensitizer/antitumor drug with synergistic anti-tumor efficacy and a preparation method of a nano drug delivery system. Conjugates are amphiphilic by connecting a photosensitizer and an indissolvable antitumor drug on a hyaluronic acid skeleton by ester bonds and are self-assembled in water to obtain a nanomicelle. The synthesis method and the preparation method are characterized by comprising the synthesis method of covalent linkage of hyaluronic acid and a photosensitizer/antitumor drug and a method for self-assembling the nano drug delivery system by the hyaluronic acid-photosensitizer/antitumor drug. The system is expected to have good biocompatibility and active targeting property of tumors in a body; the solubility of the indissolvable antitumor drug can be improved, the phagocytosis of a reticuloendothelial system is avoided, and the cycle time in the body is prolonged; after the system reaches a lesion location, the ester bonds of the system are fractured in a tumor microenvironment under the condition of a low pH value and releases the photosensitizer and the antitumor drug; the system is excited by near-infrared light to generate heat and fluorescence; on one hand, tumor cells are killed and wounded by a phototherapy and chemotherapy combined mode; on the other hand, distribution conditions of the tumor cells in the body can be characterized.

Preparation method of novel high nitrogen content compounds containing phosphaphenanthrene and phosphazene double-effect functional group

The invention belongs to the field of organic synthesis chemistry, and relates to a preparation method of a class of novel compounds containing a phosphaphenanthrene and phosphazene double-effect functional group. The compound is characterized in that the compound has a branched structure adopting cyclotriphosphazene as an inner core and adopting 9,10-dihydro-9-oxa-phosphaphenanthrene-10-oxide (short for DOPO) as a side group, wherein the structural formula is represented by the figure 1. According to the present invention, hexa(4-amino-phenoxy)-cyclotriphosphazene and 9,10-dihydro-9-oxa-phosphaphenanthrene-10-oxide (short for DOPO) are subjected to a Aterton-Todd reaction and a Kabachnik-Fields addition reaction to obtain a class of novel compounds containing the phosphaphenanthrene and phosphazene double-effect functional group. The compounds have the following advantages that: characteristics that the compounds contain phosphorus and nitrogen, do not contain halogen, and have substantially increased nitrogen content compared with the double-effect functional group compounds in the prior art are completely utilized, the phosphorus and nitrogen synergistic effect is completely provided, and the compounds can be used in polymer materials so as to achieve expected effects of high fire retardation efficiency and less toxicity.
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