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118results about How to "Reduce reaction efficiency" patented technology

Acesulfame synthesis and acylation production process

The invention relates to an acesulfame synthesis and acylation production process, which comprises the following steps of a, putting a sulfamic acid and dichloromethane into a dissolving kettle, and pumping a mixture into a synthesis kettle; b, adding dropwise triethylamine into the synthesis kettle, adding dropwise a glacial acetic acid, and performing natural reaction for 1 hour after the glacial acetic acid is added dropwise; c, placing reactants in the synthesis kettle into an acylation kettle, and adding dropwise diketene for an acylation reaction; and d, after the diketene is added dropwise, circulating a product subjected to the acylation reaction for 1 hour in the acylation kettle, placing into a heat-preservation kettle, performing natural reaction for 1 hour to generate an acetoacetyl-N-sulfonate intermediate, and feeding the acetoacetyl-N-sulfonate intermediate to a sulfonation section for use. The acesulfame synthesis and acylation production process has the advantages that 1, a stepwise reaction mode is adopted, so that compared with a conventional single-kettle production process, the method has the characteristics of production operation continuity and high reaction stability; 2, a multi-kettle stepwise production mode is adopted, so that the production efficiency is greatly improved, the reaction efficiency of the whole production flow is optimized, and the economic benefits of an enterprise are significantly improved.
Owner:ANHUI JINGHE IND

Bottom feed type gas method and equipment for preparing gas with no tar products through oxygendeficient fluid bed combustion

This invention relates to downdraft gasification method and equipment for preparing tar-free product gas by oxygen-deficient fluidized burning. The equipment comprised a front fluidized bed burner, a downdraft fixed bed gasifier set lower than the burner, a transporting pipe for carbocoal and semi-finished gas connecting the burner and the gasifying furnace, a fuel inlet and an oxidant inlet. The method comprised: (1) adding fuel through the fuel inlet of the fluidized bed burner, and performing oxygen-deficient fluidized burning with oxidant added through the oxidant inlet at the bottom of the fluidized bed burner to obtain carbocoal and semi-finished gas containing tar, and (2) sending the unseparated carbooal and semi-finished gas containing tar to a down-draft fixed bed gasifier at a high temperature to gasify the carbocoal, and modifying and cracking the tar introduced by the semi-finished gas by the catalytic activity of high-temperature carbocoal to obtain the product gas with tar. The equipment has such advantages as simple structure, easy operation and high gasifying efficiency, and is suitable for a wide variety of fuels and can produce product gas without tar.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Reciprocating type circulating single micro-channel device facing fluorescent PCR (Polymerase Chain Reaction) micro-system

The invention relates to a reciprocating type circulating single micro-channel device facing a fluorescent PCR (Polymerase Chain Reaction) micro-system and belongs to the detection fields of biology, analytical chemistry and medical science. The reciprocating type circulating single micro-channel device is characterized in that three temperature regions in PCR amplification are composed of metal pipes with good thermal performances; the three metal pipe temperature regions are connected by using ultraviolet laser cure optical colloids; the reciprocating type circulating single micro-channel device not only has the effects of isolating heat, sealing and supporting, but also has the light transmitting property; a mini-type fluorescent detection system can also be arranged to form a real-time fluorescent PCR microfluidic system. The reciprocating type circulating single micro-channel device has the essences that compressed air or silicone oil moves back and forth in a single micro-channel and a small section of a PCR reagent is used for finishing the PCR amplification of forty temperature cycles in the three temperature regions. Therefore, the volume and the weight are reduced, the reagent is saved and the reciprocating type circulating single micro-channel device is suitable for automatically working in a space on-orbit zero-gravity environment.
Owner:BEIJING UNIV OF TECH

Deep defluorination agent and preparation method thereof

The invention discloses a deep defluorination agent and a preparation method thereof, and belongs to the technical field of chemical materials. According to the technical scheme, the deep defluorination agent is prepared from the following raw materials in weight fraction: 20%-30% of calcium salt, 3%-5% of acid, 10%-15% of ferric salt, 10%-15% of aluminum salt, 2%-3% of magnesium salt, 2%-3% of water glass and the balance water, wherein the ferric salt is nano ferric silicate. Meanwhile, the invention defines a preparation method of the nano iron silicate and the defluorination agent. The nano-scale iron silicate used in the invention has a large specific surface area and can be in good contact with fluorine ions, so that the removal efficiency of the product on fluorine ions in wastewater is improved; and secondly, the preparation method of the raw materials is simple and easy to operate, and industrial production is facilitated.
Owner:北京华德创业环保设备有限公司

Structured catalyst for treating printing and dyeing wastewater and preparation method thereof

The invention discloses a structured catalyst for treating printing and dyeing wastewater and a preparation method thereof. The catalyst comprises a main catalyst, a cocatalyst, activated alumina and cordierite ceramics, wherein the main catalyst is a soluble nitrate of any of Cu, Fe and Mn, and the cocatalyst is a soluble nitrate of any of Ce, Ni and Co. According to the preparation method, a powdery catalyst for treating printing and dyeing wastewater is coated on a cordierite carrier, a dispersant is added during preparation, highly-dispersed catalyst slurry is prepared, and the dispersion and stability of the powdery catalyst are improved. The structured catalyst prepared by the preparation method has the remarkable advantages of difficult active ingredient loss, simple process, reusability, low cost and the like; and when the structured catalyst is applied to the catalytic oxidative degradation of the wastewater, the pressure drop of a reaction system can be reduced, so that the wastewater treating efficiency is increased.
Owner:SOUTHEAST UNIV

Fabric coating slurry and preparing method thereof

ActiveCN104141231AGood photostability and thermal stabilityGood water and oil resistanceFibre treatmentEmulsionMineralogy
The invention discloses fabric coating slurry which is prepared by the following components, by weight, of 100 parts of epoxidized soybean oil modified waterborne polyurethane, 5-10 parts of crosslink type macromolecule emulsion thickening agents BJ-100 and 5-10 parts of fabric coating extrusion dispersing agents PTFE D-210. The invention discloses a preparing method of the fabric coating slurry at the same time. The fabric coating slurry is well improved in light stability, heat stability, oil resistance and water resistance.
Owner:甄曰菊

Method for preparing anion template flocculant TPAS (Tissue Plasmogen Activator)

The invention discloses a method for preparing an anion template flocculant TPAS (Tissue Plasmogen Activator). The method comprises the following steps: with ultrasonic waves as an initialization mode, and by taking acrylamide and sodium p-styrenesulfonate as main raw materials, and polypropylene ammonium chloride PAAC (Polyallyl Acetate) as a template agent, preparing a water solution, adjustingthe pH value by using sodium hydroxide or hydrochloric acid, introducing a sufficient amount of nitrogen, initializing a polymerization reaction in an ultrasonic reactor, after the reaction is completed, performing aging treatment in a water bath pot, taking out a polymer obtained through synthesis, cleaning with alcohol, drying, and powdering, thereby obtaining the anion template flocculant TPAS.The method is simple in process procedure, short in reaction cycle, free of damage to instrument equipment, safe and environmental-friendly, free of toxic or side effect, low in cost, excellent in product property, and good in flocculation effect in treating hematite wastewater.
Owner:CHONGQING UNIV

Water-soluble capsanthin

ActiveCN107418246AHigh priceHigh absorbance ratioNatural dyesSolventChemistry
The invention discloses water-soluble capsanthin, and belongs to the field of high-color-value and high-extinction-ratio water-soluble capsanthin and a preparation method thereof. The water-soluble capsanthin is used in the field of coloring of the industries such as food, pharmacy and dyeing. The color value is 140-180, and the extinction ratio is greater than 1.0000. The preparation method of the water-soluble capsanthin comprises the following steps: carrying out saponifying and hydrolyzing on fat-soluble capsanthin; after extracting the fat-soluble capsanthin with a solvent, carrying out separation and purification by a column chromatography to obtain eluant of main coloring ingredients, which comprise capsaicin and capsorubin, of the capsanthin, concentrating the eluant, and then emulsifying the emulsify. The water-soluble capsanthin has the advantages of high color value, high extinction ratio, red and bright color, easiness in coloring, and no precipitation or layering after centrifuging.
Owner:河北东之星生物科技股份有限公司

Bottom feed type gas method and equipment for preparing gas with no tar products through oxygendeficient fluid bed combustion

This invention relates to downdraft gasification method and equipment for preparing tar-free product gas by oxygen-deficient fluidized burning. The equipment comprised a front fluidized bed burner, a downdraft fixed bed gasifier set lower than the burner, a transporting pipe for carbocoal and semi-finished gas connecting the burner and the gasifying furnace, a fuel inlet and an oxidant inlet. The method comprised: (1) adding fuel through the fuel inlet of the fluidized bed burner, and performing oxygen-deficient fluidized burning with oxidant added through the oxidant inlet at the bottom of the fluidized bed burner to obtain carbocoal and semi-finished gas containing tar, and (2) sending the unseparated carbooal and semi-finished gas containing tar to a down-draft fixed bed gasifier at a high temperature to gasify the carbocoal, and modifying and cracking the tar introduced by the semi-finished gas by the catalytic activity of high-temperature carbocoal to obtain the product gas with tar. The equipment has such advantages as simple structure, easy operation and high gasifying efficiency, and is suitable for a wide variety of fuels and can produce product gas without tar.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

System and method for synthesizing rubber scorch retarder CTP

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a system and a method for synthesizing rubber scorch retarder CTP. The system provided by the invention comprises a conveying pipeline for cyclohexyl sulfenyl chloride and catalyst mixed liquid, a conveying pipeline for phthalimide sodium salt and catalyst mixed liquid, and a micro-reaction device, wherein the micro-reaction device is respectively connected with the material outlet of the conveying pipeline for cyclohexyl sulfenyl chloride and catalyst mixed liquid and the material outlet ofthe conveying pipeline for phthalimide sodium salt and catalyst mixed liquid; the micro-reaction device is a microchannel reactor, a high-shear reactor or a pipe-type reactor. According to the systemprovided by the invention, liquid and liquid two-phase liquid is used for being in full contact in the micro-reaction device to react to synthesize the rubber scorch retarder CTP, the uninterrupted reaction of the CTP synthesis is realized, and the production efficiency and the reaction yield of the synthesized CTP can be greatly improved. Meanwhile, the purity and the quality stability of the product are improved. the system has a good application prospect and can generate considerable economic benefits and social benefits.
Owner:TANGYIN YONGXIN CHEM CO LTD

Hydrogen supply system, fuel cell engine and vehicle

The invention discloses a hydrogen supply system, a fuel cell engine and a vehicle, which relate to the technical field of fuel cell vehicles. The hydrogen supply system comprises a hydrogen supply pipeline, ahydrogen circulating pipeline and an exhaust valve, wherein thehydrogen supply pipeline is provided with a hydrogen heater and an injection ejector, a gas inlet of the hydrogen heater is configured to be communicated with a hydrogen supply source, a gas outlet of the hydrogen heater is communicated with an inlet of the injection ejector, and an outlet of the injection ejector is configured to be communicated with an anode inlet of an electric pile; the inlet end and the outlet end of the hydrogen circulating pipeline are configured to be respectively communicated with the anode outletof the electric pile and the inlet of the injection ejector; one end of the exhaust valve is communicated with the hydrogen circulating pipeline, and the other end of the exhaust valve is communicated with the outside of the hydrogen supply system. When the hydrogen supply system supplies hydrogen to the electric pile, the working requirements of the fuel cell engine under all working conditionscan be met, the power consumption is low, the hydrogen supply quality can be ensured in the long-term use process, and the reaction efficiency of the galvanic pile is ensured.
Owner:FAW JIEFANG AUTOMOTIVE CO

Preparation method of calcium alginate gel balls

The invention discloses a preparation method of calcium alginate gel balls, and belongs to the field of natural carrier preparation. Aiming at the problems of low preparation efficiency and poor effect of existing calcium alginate gel balls, the invention provides a preparation method of calcium alginate gel balls, wherein the preparation method comprises the following steps: respectively preparing a sodium alginate solution and a calcium chloride solution; pouring the prepared sodium alginate solution into a mold, freezing the mold, and then obtaining sodium alginate ice balls; and putting the sodium alginate ice balls into a calcium chloride solution, soaking and stirring to obtain the calcium alginate gel balls. The sodium alginate solution is frozen, water in the solution can be converted into ice crystals, the specific surface area of the obtained sodium alginate ice balls is increased, gaps are increased, the obtained sodium alginate ice balls and the calcium chloride solution are subjected to a cross-linking reaction to form more pore structures, the specific surface area and pore volume of the calcium alginate gel balls are increased, and the calcium alginate gel balls serve as a microbial immobilization carrier; and the microorganism attachment area is increased, the efficiency is high, and the subsequent effect is strong.
Owner:SHANGHAI INST OF TECH
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