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30results about How to "Long reaction cycle" patented technology

Preparation method of graphene/zinc-aluminium oxide composite material and application of composite material in super capacitor

The invention belongs to the field of chemical and provides a preparation method of a graphene / zinc-aluminium oxide composite material and application of the composite material in a super capacitor. The preparation method comprises the steps of: dissolving a graphite oxide precursor, a zinc salt precursor and an aluminium salt precursor in an organic solvent, adding a small amount of deionized water, and ultrasonically dispersing the mixture to be uniform; transferring a mixed solution to a microwave reactor and then slowly dropwise adding an alkali source compound; and washing a product with alcohol for multiple times, then drying the product in vacuum, putting the product in a tubular furnace, introducing Ar / H2 mixed gas, and carrying out high-temperature thermal pyrolysis, thereby obtaining the finished product, namely the graphene / zinc-aluminium oxide composite material. No toxic chemical agent is used in the reduction of graphene, so that harm to human bodies and environment pollution, caused by a great quantity of harmful chemical agents such as hydrazine hydrate serving as a strong reducing agent used in a chemical reduction method, are eliminated fundamentally.
Owner:JIANGNAN UNIV

Method for preparing liquid octylated diphenylamine antioxidant

The invention discloses a method for preparing a liquid octylated diphenylamine antioxidant, which belongs to the field of chemical synthesis, and particularly relates to a method for synthesizing high-content mono-octyl diphenylamine. The method comprises the following steps of: under the action of a catalyst, making diphenylamine react with diisobutylene to generate an octylated diphenylamine mixture; introducing isobutene for reacting; and distilling to obtain the liquid octylated diphenylamine antioxidant, wherein the catalyst is dehydrated active white clay. The prepared liquid octylated diphenylamine antioxidant is a light-yellow viscous liquid at normal temperature, and the moving viscosity is 50-300 mm<2> / s at the temperature 40 DEG C. The liquid octylated diphenylamine antioxidant can be effectively applied to turbines, aircrafts and various oil products and lubricating agents which are applied at high operation temperatures, and can be applied to high-polymer rubber products to prevent rubber from being thermally oxidized and aged by elastic deflection.
Owner:JIANGSU FEIYA CHEM IND

Method for recovering high-purity metal palladium from organic waste palladium contained catalyst

InactiveCN103555957AEasy to useMature post-processing technologyProcess efficiency improvementPalladiumReaction step
The invention relates to the class of chemical technologies, belongs to the field of solid waste recovery and particularly relates to a method for recovering high-purity metal palladium from an organic waste palladium contained catalyst. The method comprises the steps of waste pretreatment, leaching, extraction, purification and hydrogenation preparation, thereby finally obtaining high-purity metal palladium. The method provided by the invention is simple in reaction step, short in time and capable of saving reagents; in addition, the recovery rate of palladium is up to over 99.2%, and the purity of recovered palladium is higher than 99.98%.
Owner:ZHEJIANG METALLURGICAL RES INST

Process for preparing diisobutyl phthalate by electro-catalytic degradation of lignin in fixed bed reactor

The invention relates to a method for preparing diisobutyl phthalate by electrochemically degrading lignin. According to the method, a three-dimensional fixed bed reactor is formed by using Ti / SnO2-Sb2O3-Fe(NO3)3 / PbO2 as a working electrode, a copper mesh electrode as an auxiliary electrode, filled nutshell activated carbon as a third electrode and a standard saturated calomel electrode as a reference electrode. Electro-catalytic degradation of the lignin is combined with an integrated process for continuous electro-catalytic degradation and solvent extraction separation, so that degraded products can be separated from a lignin alkali solution rapidly. By combining the electro-catalytic degradation of the lignin with the integrated process for continuous electro-catalytic degradation and solvent extraction separation, reaction conditions are mild; process technology is simple and can be operated easily; byproduct-lignin of a paper-making factory is used relatively well; and a fine chemical product-diisobutyl phthalate is obtained; and the method has relatively good industrial application values.
Owner:HEBEI UNIV OF TECH

Test paper conveying device and method

ActiveCN109696555ALong reaction cycleResponse cycle increases or decreasesBiological testingPulp and paper industryTest strips
The invention discloses a test paper conveying device and method. The test paper conveying device comprises a bottom plate, a lifting driving mechanism arranged on the bottom plate and a tooth plate arranged on the lifting driving mechanism, wherein two sides of the upper end of the tooth plate are provided with racks for pushing test papers; the rack comprises multiple semi-height teeth arrangedin a spaced mode and full-height teeth arranged at the tail ends of the racks; and the bottom plate is also provided with a horizontal driving mechanism for driving the tooth plate to move horizontally. Through the matched design between the full-height teeth and the semi-height teeth of the racks, in a condition of not changing the whole structure of the device, the purpose of enabling the test speed to be increased or decreased by a test paper reaction period is realized.
Owner:DIRUI MEDICAL TECH CO LTD

Synthetic method of mercapto functionalized polyaryl carboxylic acid compound

The invention relates to the technical field of compound synthesis and in particular discloses a synthetic method of a mercapto functionalized polyaryl carboxylic acid compound. The synthetic method concretely comprises the following steps: in the presence of a palladium catalyst, putting aryl fluoride, aryl boric acid and alkali metal salt serving as raw materials into a mixed system of water / organic solvent, and carrying out a series of subsequent reactions including Suzuki reaction to obtain the mercapto functionalized polyaryl carboxylic acid compound. According to the synthetic method disclosed by the invention, as the Suzuki reaction is realized in the air environment firstly, the reaction condition is greatly simplified, the reaction time is shortened from 2d to 1h, and the productivity and the yield are greatly increased; in addition, by adopting the environment-friendly solvent, the environment is beneficially protected; the mercapto functionalized polyaryl carboxylic acid compound synthesized by utilizing the synthetic method can be largely applied to metal organic compounds to build a series of novel porous materials with novel structures and excellent performances.
Owner:GUANGDONG UNIV OF TECH

Long-acting catalyst for electrolytic silver

The present invention relates to a long-acting electrolytic silver catalyst made up by using DC powder supply 1% pulsating component. When the chemical product formaldehyde is produced, said silver catalyst can make period be up to 120-180 days. The catalyst silver ed is low in resistance, good in air permeability and high in conversion rate.
Owner:李洪伟 +1

System for purifying a gaseous medium of hydrogen and method for the use thereof

Disclosed is a hydrogen igniter for igniting hydrogen contained in a gaseous medium, said hydrogen igniter comprising a housing with openings for the supply and discharge of a gaseous medium, and a filler in the form of bismuth oxide and / or lead oxide, disposed inside the housing. Also disclosed are a system for purifying a gaseous medium of hydrogen having such a hydrogen igniter, and a method for the repeated use of such a system. The igniter and the system can be used in a nuclear reactor facility.
Owner:JOINT CO AKME ENG

Synthesizing process of 2, 5-dichlorophenol

InactiveCN105884582AReduce the treatment amount of three wastes in the processReduce manufacturing costOrganic compound preparationHalogenated hydrocarbon preparationBromineBenzene
The invention discloses synthesizing process of 2, 5-dichlorophenol and belongs to the technical field of fine chemical industry. The synthesizing process includes halogenation and hydrolysis. The synthesizing process has the advantages that bromine or iodine which can be substituted more easily than chlorine is used, the bromine or iodine substituent group is hydrolyzed into hydroxyl after dichlorobenzene is halogenated, and halogenation depth is controlled by controlling the adding amount of the bromine or iodine so as to reduce the content of 2, 5-dichloro-1, 4-dihalogen benzene in the halogenation product; the conversion rate of 2, 5-dichloro halobenzene reaches above 92.0%, and the synthesizing process is short in synthetic route, simple, low in cost, few in produced three wastes and suitable for large-scale production.
Owner:SICHUAN FOURSTAR BIOTECH RANDD CORP

Preparation method for gold nanorods

The invention discloses a preparation method for gold nanorods, and belongs to the field of synthetic preparation of metal nanomaterials. The method comprises the steps that an aqueous solution of a polyoxyethylene-polypropylene oxide-polyoxyethylene amphiphilic block copolymer is prepared and then pre-heated, a chloroauric acid solution with the same temperature is quickly injected, even mixing is conducted, water-bath heating is conducted, and after a reaction is completed, a mixture is naturally cooled to the room temperature. According to the preparation method, by regulating and controlling the self-assembling process of the amphiphilic block copolymer, the rodlike micelle morphology is formed and taken as a template to regulate and control growth of gold nanoparticles, and thus the gold nanorod particles are obtained. Meanwhile, under the alkaline condition, hydrophobic interaction between the amphiphilic block copolymer Pluronic and nanogold is enhanced, the Pluronic is adsorbedon the surface of the nanogold, and the gold nanorods can be stabilized in the solution for several months and do not agglomerate. The gold nanorod particles existing in the solution do not have cytotoxicity and can be used for biological substance detection and bioaffinity drug vectors.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Method for preparing biphenyl-4-formyl corey lactone by using one-pot method

The invention discloses a method for preparing biphenyl-4-formyl corey lactone by using a one-pot method. The method comprises the following steps: in a same reaction container, with corey lactone glycol as a raw material, adding a solvent S1 and triphenyl chlorometha to carry out an alkylation reaction in a primary hydroxyl position so as to obtain a solvent S1 reaction system with a corey lactone glycol primary hydroxyl derivative, further adding benzoyl chloride to carry out an acylation reaction in a secondary hydroxyl position, adding a solvent S2, and performing recrystallization so as to obtain a corey lactone glycol double-hydroxyl derivative; adding a solvent S3 and an acid solution to carry out a hydrolysis reaction in a primary hydroxyl position so as to obtain a crude product of biphenyl-4-formyl corey lactone; adding a solvent S4 or / and a solvent S5, and performing recrystallization, thereby obtaining the biphenyl-4-formyl corey lactone with corresponding optical activityat one time. The method is capable of avoiding the situation that materials are repeatedly fed in different steps of tedious reactions, is sufficient in reaction, small in side reaction, high in purity, simple in aftertreatment, high in yield, simple in operation, short in time, high in efficiency, low in material quantity, low in cost and applicable to industrial production.
Owner:JINLIN MEDICAL COLLEGE

Hydrolyzed fish collagen processing process

The invention discloses a hydrolyzed fish collagen processing process. The process includes steps: removing fish scales and fish skin, draining after clearing, and keeping for standby application; soaking the fish scales and the fish skin in water, and performing sterilization treatment; subjecting the fish scales and the fish skin to enzymolysis, filtering, and removing filter residues to obtainenzymatic hydrolysate; feeding the enzymatic hydrolysate into a molecular weight screening system to obtain collagen solutions graded according to collagen molecular weights; concentrating the collagen solutions, drying, and treating with a magnetic rod to obtain fish collagen. The hydrolyzed fish collagen processing process has advantages that before enzymolysis, the fish scales and the fish skinare subjected to high-temperature sterilization to damage tissues in the fish scales and the fish skin, so that acid and alkali swelling treatment can be avoided, enzyme activity can be guaranteed, and enzymolysis completeness is improved; a fish collagen product is free of fishy smell, low in ash content, simple in production process, low in cost, great in taste, high in water solubility and lowin salt content.
Owner:王明

Micro-channel reactor and preparation method of high-content dichlorvos

The invention discloses a micro-channel reactor. The micro-channel reactor is of a three-layer sandwich structure, wherein a flowing heating medium is arranged in the upper layer and the lower layer,and the middle layer is a reaction space of a multi-stage series heart-shaped structure; a vacuum pumping hole communicating with the middle-layer reaction space is locally reserved in the upper layer; and the hole is covered with a molecular sieve or a semipermeable membrane with a pore diameter of 0.6-0.7 nm. The micro-channel reactor is used for producing dichlorvos, the temperature of the heating medium is 40-50 DEG C, and the air pressure of the reaction space is minus 0.02 to minus 0.08 Mpa. According to the invention, when methyl chloride and water vapor volatilize, trimethyl phosphiteand trichloracetic aldehyde cannot be entrained, side reactions cannot be generated, trichloracetic aldehyde cannot form hydrate, and a reaction speed and a conversion rate are increased.
Owner:NANTONG JIANGSHAN AGROCHEM & CHEM LIMITED LIABILITY

Metathesis catalyst and process for producing olefin

The present invention provides a catalyst comprising a transition metal, an inorganic support, a zeolite, and a layered double hydroxide. Using of the catalyst according to the present invention in an olefin production process exhibits high activity and high selectivity with decreased deactivation rate, therefore longer reaction cycle can be performed and catalyst life is prolonged.
Owner:SMH CO LTD

AAO process water treatment equipment

The invention discloses an AAO process water treatment equipment, which relates to the technical field of water treatment. It adopts the combination of A / A / 0 process and ABR baffle reactor to solve the problem of high nitrogen and phosphorus content in the sewage treatment process of artificial wetlands in rural areas. Sewage treatment is difficult, the backlog of solid suspended matter reduces the service life of constructed wetlands, and the technical problems of low effluent quality. The present invention includes anaerobic compartment A, anaerobic compartment B, anaerobic compartment C, and anoxic compartment in series. , the aerobic compartment A, the aerobic compartment B and the sedimentation chamber, the compartments are separated by a wave-shaped baffle, and the bottom of the aerobic compartment A, the aerobic compartment B and the sedimentation chamber downstream area is provided with a tree Branch-shaped porous aeration head, the tail end of the aerobic compartment B is connected to the anoxic compartment through the pipeline, and the sedimentation chamber is connected to the anaerobic compartment A through the pipeline. , phosphorus effect and volume utilization.
Owner:弘毅天承知识产权股份有限公司

A kind of preparation method of improving the free fiber silk of sodium carboxymethyl cellulose aqueous solution

ActiveCN104592399BReduce outputExtend alkalization timeFiberYarn
The invention relates to a preparation method of sodium carboxymethyl cellulose, aiming at providing a preparation method of the sodium carboxymethyl cellulose for improving a free fiber yarn contained in a water solution. The preparation method for improving the free fiber yarn contained in a sodium carboxymethyl cellulose water solution comprises the following steps: respectively crushing purified cotton and wood pulp, and successively adding the crushed purified cotton and wood pulp to a kneader with a sodium hydroxide water solution and an ethanol water solution together; vacuumizing the kneader, filling an inert gas, and carrying out alkalization reaction at constant temperature of 38-50 DEG C for 40-120 minutes; adding an etherifying agent, increasing temperature to 75-80 DEG C, and carrying out etherifying reaction at constant temperature of 75-80 DEG C for 30-90 minutes; and washing, neutralizing, centrifugalizing, drying and crushing a reaction product to obtain a sodium carboxymethyl cellulose finished product. According to the sodium carboxymethyl cellulose prepared through the method disclosed by the invention, the sodium carboxymethyl cellulose water solution is clear and transparent and contains no free fiber yarn so as to be applied to the industrial field with strict requirements on the free fiber yarns.
Owner:CHONGQING LIHONG FINE CHEM

Method for improving quality and reaction period in production of gasoline by using low-carbon hydrocarbons

The invention provides a method for improving quality and reaction period in the production of gasoline by using low-carbon hydrocarbons, which belongs to the technical field of low-carbon hydrocarbon aromatization. The method adopts a reaction equipment system, and is characterized in that: the equipment system consists of a heating furnace, a reactor, a cooler, a gas-liquid separation tank and a flash drum, which are connected in turn. A low-carbon hydrocarbon material and a dry gas are mixed and introduced into the heating furnace to be pre-heated to 250 to 450 DEG C, the heated mixture is transferred to a reactor under a pressure of 0.8 to 205MPa, the reaction solution is cooled by a cooler to 35 to 45 DEG C and then transferred to the flash drum for flashing to remove dry gases having less than 4 carbon atoms, the dry gases are mixed with the rich gas on the top of an enterprise separation tank, the mixed gases are exhausted from the device, and the crude gasoline at the bottom of the flash drum is refined to produce high-grade gasoline. The method of the invention is simple and easy to implement; the equipment flow is short; the gasoline component distribution is improved; the quality of the gasoline is improved; the operation is safe and stable; the period is doubled; and the effect is obvious.
Owner:SHANDONG DAQI PETROLEUM CHEM DESIGN

Metathesis catalysts and methods for the production of olefins

The present invention provides a catalyst comprising a transition metal, an inorganic support, a zeolite and a layered double hydroxide. The use of catalysts according to the invention in olefin production processes exhibits high activity and high selectivity with reduced deactivation rates, thus enabling longer reaction cycles and prolonging catalyst life.
Owner:SMH CO LTD

Synthesis method of 2-bromo-2-(2-fluoro-3-methoxyphenyl)ethyl acetate

The invention discloses a synthesis method of 2-bromo-2-(2-fluoro-3-methoxyphenyl)ethyl acetate. The synthesis route is as shown as the follows. The synthesis method comprises the following two stepsof synthesizing a compound represented by a formula I and synthesizing a compound represented by a formula VI. The target compound is prepared by adopting a two-step method according to the synthesisscheme disclosed by the invention, reaction energy consumption is low, "three wastes (waste gas, waste water and industrial residue)" are few, the preparation period is short, and impurity productioncapacity is low.
Owner:安徽华胜医药科技有限公司

A high-efficiency and environment-friendly catalyst for regeneration of waste tire oil

The invention relates to a novel efficient and environment-friendly catalyst for waste tire oil regeneration. The novel efficient and environment-friendly catalyst comprises the following preparation steps: step 1, manufacturing a catalyst A; step 2, manufacturing a catalyst B; produced diesel oil is changed to be light yellow, the density reaches 0.86-0.88, the odor is basically eliminated, the values of hexadecane and octane in the diesel oil are high, C2 dry gas in pyrolysis gas is less, the liquid yield is up to above 80 percent, a pour-point depression effect is realized, and a pour-point can be controlled to be 0 to minus 20 DEG C. The catalyst has the benefits that the service life is long, about 800 tons of tire oil can be processed by one ton of catalyst and be regenerated for 2-3 times, the cost is improved by about 50 yuan / ton to 100 yuan / ton, complicated acid and alkali washing processes are omitted, the sales price is higher than 500-1000 yuan compared with that of oil produced without using the catalyst, the content of sulphur in the oil is low, the catalyst is taken as fuel and is used for directly burning tail gas, and the emission is up to standard, so that the environment-friendly and pollution-free standards are completely achieved.
Owner:山东久硕环保科技有限公司

Bimetal fluoride, preparation method thereof and application of bimetal fluoride in lithium-free positive electrode

The invention provides a bimetallic fluoride, a preparation method thereof and an application of the bimetallic fluoride in a lithium-free positive electrode. The preparation method comprises the following steps: selecting a transition metal-based organic metal framework material as a metal framework precursor, selecting common transition metal nitrate as a doping element source, and doping the transition metal-based organic metal framework material with other types of transition metal elements to obtain a multi-metal cation framework; and further carrying out fluoridation treatment on the bimetallic fluoride to prepare the bimetallic fluoride. The bimetallic fluoride has a uniform pore structure and a high ion / electron mixed conductive support structure, so that the capacity of the metal fluoride can be efficiently utilized, and the technical defects of low capacity utilization rate, large voltage lag and poor cycling stability of a traditional metal fluoride cathode in the prior art are effectively overcome.
Owner:HUAZHONG UNIV OF SCI & TECH

Preparation of diisobutyl phthalate by electrocatalytic degradation of lignin in a fixed bed reactor

The invention is a method for electrochemically degrading lignin to prepare diisobutyl phthalate. The method uses Ti / SnO 2- Sb 2 o 3 -Fe(NO 3 ) 3 / PbO 2 As the working electrode, the copper mesh electrode is used as the auxiliary electrode, the loaded activated carbon is used as the third electrode, and the standard saturated calomel electrode is used as the reference electrode to form a three-dimensional fixed-bed reactor for electrocatalytic degradation of lignin, combined with continuous electrocatalytic degradation The integrated process of separation with solvent extraction enables the degradation products to be separated from the lignin alkali solution quickly. The present invention combines the integrated process of continuous electrocatalytic degradation and solvent extraction separation with electrocatalytic degradation of lignin, which has mild reaction conditions, simple and easy-to-operate process technology, and better development and use of lignin, a by-product of paper mills, to obtain The fine chemical product diisobutyl phthalate has good industrial application value. <pb pnum="1" / >
Owner:HEBEI UNIV OF TECH

Synthetic preparation method of wintergreen oil

The invention relates to the field of chemical synthesis, and particularly discloses a synthetic preparation method of wintergreen oil. The synthetic preparation method comprises the following steps:(1) methanol, salicylic acid and methyl carboxylate are sequentially put into a reaction kettle according to the molar ratio of (2 to 3):1:(0.1 to 0.3); (2) a synthetic reaction is generated under theconditions of heating and pressurization, and a mixed solution A containing the wintergreen oil is obtained; and (3) the mixed solution A is distilled and separated to obtain the wintergreen oil. According to the method, the defects of a traditional concentrated sulfuric acid catalytic method are overcome, and the methyl carboxylate serves as a catalyst, so that the beneficial effects that raw materials are easy to obtain, the reaction flow is simple, the catalyst can be removed only through simple distillation, subsequent treatment is easy, and the prepared wintergreen oil is large in product purity and high in conversion rate are achieved.
Owner:江西省隆南药化有限公司

Heavy aromatics lightening catalyst as well as preparation method and application thereof

The invention discloses heavy aromatics lightening catalyst. The catalyst comprises a composite carrier and VA group element oxide with the content of 0.5-10.0% by mass calculated based on the composite carrier, and the composite carrier comprises 10-45% by mass of ZSM5 zeolite, 10-45% by mass of EU1 zeolite and 10-80% by mass of aluminum oxide. The catalyst is used for the non-hydrogen lighteningreaction of C9-C12 heavy aromatics, and can obtain higher light aromatic hydrocarbon yield and byproduct propane-rich high-quality liquefied gas.
Owner:CHINA PETROLEUM & CHEM CORP +1

A kind of synthetic preparation method of wintergreen oil

The invention relates to the field of chemical synthesis, and specifically discloses a synthetic preparation method of wintergreen oil. The method comprises the following steps: (1) according to the molar ratio of 2-3:1:0.1-0.3, methanol, salicylic acid and methyl carboxylate are sequentially put into the reactor; (2) under the condition of heating and pressurizing , a synthesis reaction occurs to obtain a mixed solution A containing wintergreen oil; (3) distilling and separating the mixed solution A to obtain wintergreen oil. This method not only overcomes the defects of the traditional concentrated sulfuric acid catalytic method, but also uses methyl carboxylate as the catalyst, which has the advantages of easy access to raw materials, simple reaction process, simple distillation to remove the catalyst, and simple follow-up treatment. The prepared wintergreen oil has beneficial effects such as high product purity and high conversion rate.
Owner:江西省隆南药化有限公司
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