426results about How to "Control reaction temperature" patented technology

The invention discloses a preparing method of graft copolymerization carboxylate high-performance dehydragent belonging to dehydragent domain, which comprises the following steps: choosing methoxy carbowax with molecular weight distributing between 1000-2000 and acroleic acid or methacrylic acid as main raw material; adopting total acid method esterified priority method; preparing intermediate (big monomer) with polymerization activity; adding third monomer into polymerization reaction; adjusting polymerization activity of copolymerization system; proceeding technique route synthesis of main chain polymerization in the water solution. The getting big monomer possesses merits of high conversion rate, short reacting time, simple process flow and strong controlling property.

The invention discloses a high-temperature-resistance pork paste essence. The pork paste essence comprises the following components in parts by weight: 90-98 parts of thermal reaction pork paste and 2-10 parts of pork flavoring base, wherein, the thermal reaction pork paste is prepared from the following raw materials according to a certain mass ratio: a pork thermal reactant, edible salt, white granulated sugar, sodium glutamate, disodium 5'-ribonucleotide, disodium succinate, corn starch, hydroxypropyl distarch phosphate, beta-cyclodextrine and glycerin monostearate; and the pork thermal reactant is prepared from the following raw materials according to a certain mass ratio: a pork zymolyte, a yeast extract, glucose, xylose, dark soy sauce, animal fat, sodium glutamate, amino acid, ginger powder, cinnamon powder and water. After high-temperature treatment, the pork paste essence disclosed by the invention still has the characteristics of rich and durable flavor and strong high temperature resistance. Meanwhile, the invention further discloses a preparation method of the high-temperature-resistance pork paste essence.

The invention discloses a method for synthesizing inorganic perovskite nanowires. According to the method, a CsPbBr3 nanowire which has a length of several millimeters, a diameter of only about 10 nmand an ultrahigh draw ratio is prepared at a low temperature by utilizing a solvothermal method and an anion exchange method, and nanowires CsPbI3 and CsPbCl3 are obtained by virtue of a simple anionexchange process. The method has a great effect of promoting industrial large-scale preparation of inorganic perovskite nanowires and is expected to further realize application in various aspects suchas photoelectric detection, laser and solar cells and the like. The method disclosed by the invention is simple, controllable, high in yield, uniform in morphology, low in reaction temperature and suitable for large-scale production.

A process for preparing amino phenylmether from nitro phenylmether mixture by catalytic hydrogenating includes such steps as catalytic hydroreducing reaction between methanol, nitro phenylmether mixture and catalyst, recovering catalyst, decoloring, removing impurities, filtering to obtain liquid phase (the solution of amino phenylmether, methanol and water), separation and refining.

The invention discloses spherical ferrate having a hollow structure and a preparation method thereof. The ferrate MFe2O4 is of a hollow-structured spherical particle formed by self-assembling of nanocrystals having a particle size of 10-50nm, wherein M is Co, Ni or Zn, the diameter of the particle is 0.1-1mu m, and the thickness of a shell layer is 30-200nm. The spherical ferrate can be used as a negative electrode material of a lithium ion battery.

The invention relates to a novel method for synthetizing vinyl acetate by a calcium carbide acetylene method, which is characterized in that synthetic reaction is carried out on acetylene gas produced by adopting calcium carbide and acetic acid in a tube array type fixed bed reactor. The novel method is realized by utilizing a fixed bed technology in a process for synthetizing the vinyl acetate by the calcium carbide acetylene method, and especially, acetic acid simultaneously enters a gas-liquid mixed evaporator under the action of the acetylene gas after being preheated by changing an acetic acid feed mode into a gas-liquid mixed feed mode, and then enters the reactor through a second preheater and a third preheater, and the gas mixture passes through an inert heat transfer filler and then passes though a corresponding catalyst to be synthetized into the vinyl acetate. By adopting the mode, the novel method can reduce reaction byproducts and has the advantages of easy separation, raw material use ration improvement, production cost reduction, conversion rate improvement, small investment, high product purity, high quality and low impurity content.

The invention discloses an apparatus and method to produce isooctane by an indirect alkylation technique. The apparatus comprises fixed-bed reactor I, a catalytic distilling column, an extracting column and a recycling column which are connected in sequence. The method comprises: allowing mixed C4 and a polymerization inhibitor to react in reactor I, feeding part of the product into the catalyticdistilling column, and removing reaction heat from the other part by a heat exchanger before returning; after catalytic distillation, feeding the overhead product into fixed-bed reactor II, reflowingafter reacting, and feeding the bottom product into the extracting column; after extracting, feeding overhead biopolymer into a desulfurizing column, and feeding the bottom product into the recyclingcolumn; after recycling, returning an extracting agent into the extracting column and the polymerization inhibitor to the reactor I; subjecting the biopolymer and hydrogen to hydrodesulfurization in the desulfurizing column to obtain isooctane that may act as a gasoline blend component. Existing MTBE (methyl tert-butyl ether) production equipment is modified into isooctane production equipment; the produced isooctane may act as an ethanol-gasoline blend component; byproducts of the isooctane may also act as other materials for reuse.

An on-board hydride storage system and process are described. The system includes a slurry storage system that includes a slurry reactor and a variable concentration slurry. In one preferred configuration, the storage system stores a slurry containing a hydride storage material in a carrier fluid at a first concentration of hydride solids. The slurry reactor receives the slurry containing a second concentration of the hydride storage material and releases hydrogen as a fuel to hydrogen-power devices and vehicles.

The invention relates to a method for continuously synthesizing ethyl 4-chloroacetoacetates. The method comprises the following steps: pumping a cooled diketene solution into a falling film reactor through a metering pump, and enabling the cooled diketene solution to uniformly form a film through a distributor, and flow into the reactor from a tower top; meanwhile, controlling the flow of chlorine gas through a gas flow meter; introducing the chlorine gas into the reactor through a gas distributor; carrying out a reaction on the diketene and the chlorine gas on the surface of the falling film reactor; after the reaction is finished, enabling reaction liquid to flow out from a tower bottom and enter an esterification reaction kettle; pumping in different alcohols and overflowing into a next esterification reaction kettle to continually react; absorbing hydrogen chloride gas, which is generated in a reaction process, with water; after the reaction is finished, washing with water and neutralizing to remove the residual hydrogen chloride; distilling an organic phase to recycle a solvent and excessive alcohol raw materials to obtain a crude product; rectifying the crude product to obtain an ethyl 4-chloroacetoacetates product. With the adoption of the method, reaction time can be shortened, energy consumption is reduced, polychlorides are controlled, reaction selectivity is improved, rectification is relatively easy, and yield and purity of the product are improved.

The invention provides a method for preparing dihydric alcohol mono-t-butyl ether. The method comprises the following steps: carrying out an alkylation reaction on dihydric alcohol, liquefied petroleum gas and acid catalyst at 40-100 DEG C and 0.5-5.0MPa to obtain the dihydric alcohol mono-t-butyl ether. The method has the beneficial effects that the liquefied petroleum gas containing isobutene is used as a reaction raw material and matched with dihydric alcohol and acid catalyst, and the contact time and reaction temperature of reaction materials are controlled, thus a high-selectivity dihydric alcohol mono-t-butyl ether crude product can be obtained.

The invention relates to a stabilizer for SBS (styrene butadiene styrene) modified asphalt and a preparation method thereof. The stabilizer comprises the following components in parts by weight: 6-30 parts of sulfur, 6-15 parts of phenyl olefin polymers, 30-40 parts of aromatic hydrocarbon thick oil and 10-40 parts of dispersed carrier substances. The preparation method comprises the following steps of: adding the components into an internal mixer at 180 DEG C, carrying out blending and internal mixing, and carrying out extruding, pelleting and cooling. The stabilizer is used for producing high-proportion SBS modified asphalt and high-viscosity asphalt and has the advantages that an isolation test result is lower than 2.5 DEG C, the softening point can reach 70-90 DEG C, and technical requirements in industry specifications of ministry of communications, namely 'Standard Specification for Construction and Acceptance of Highway Asphalt Pavements' (JTG F40-2004) are met.

The invention provides a method for preparing cyclohexanone oxime by ammoximation of cyclohexanone. According to the method, 5.0-100 mu m of titanium silicalite molecular sieve is used as a catalyst, the reaction temperature is controlled by using an external circulation heating mode, and a reaction product and the titanium silicalite molecular sieve are separated in an external circulating filter. Compared with the prior art, the method has the advantages that the device investment is low, the separation problem between the catalyst and the reaction product can be better solved, the utilization rates of a molecular sieve and a reaction device can be improved, the reaction effect is better under the condition that the concentration of the catalyst is the same, the control is more stable, the overhauling of the device is easier, and the effective utilization rate of hydrogen peroxide can reach 90% or so.

The invention discloses a detachable nozzle and device for manufacturing an atomic layer deposited film. The nozzle for manufacturing the atomic layer deposited film comprises an air inlet pipeline, an air inlet and an air outlet, wherein the air inlet, as well as the air outlet, has a cavity therein, the cavity is formed inside the air outlet and is divided into an upper half part and a lower half part between which a funneled structure is arranged; the air inlet pipeline is fixedly connected with the air inlet; the air inlet and the air outlet is in demountable sealing connection. The device used for manufacturing the atomic layer deposited film comprises nozzles, a cavity support frame, a substrate carrying table and a motion platform, wherein a strip-shaped hollow part is formed in the middle of the cavity support frame, the detachable nozzles can be sequentially arranged in the hollow part; the substrate carrying table is arranged below a cavity support frame and is driven by the motion platform. The nozzle and the device are suitable for deposition reaction of different atomic layers, can be used for quickly and effectively manufacturing the atomic layer deposited layers through a gas separation atomic layers deposition method.

The invention discloses a preparation method of flower-like alpha-Ni(OH)2. The preparation method comprises the following steps of: adding a nickel salt and urotropine into de-ionized water, stirring and dissolving, wherein the amount ratio of the nickel to the urotropine is 1:1-1:2, and the concentration of the nickel salt in the solution is 0.1-1 mol/L; taking 5 mL of mixed solution; adding 10-35 mL of lower alcohol into the mixed solution; adding the obtained solution into de-ionized water until the volume is 40 mL; transferring to 50 mL polytetrafluoroethylene-lined high pressure reaction kettle; reacting at 160 DEG C for 2 hours; cooling; filtering; washing with the de-ionized water and absolute ethyl alcohol for many times to filter a product respectively; an holding in a vacuum drying box of 60 DEG C for drying to prepare the flower-like alpha-Ni(OH)2. According to the preparation method, the urotropine is used as a precipitator, the ethanol is used as a solvent, and the finally purer flower-like alpha-Ni(OH)2 is prepared.

The invention discloses an emulsion with a core-shell structure and an environment-friendly interior wall coating containing the emulsion. The emulsion with the core-shell structure is obtained by semi-continuous polymerization of methyl methacrylate, styrene, butyl acrylate and methacrylic acid, wherein the environment-friendly interior wall coating consists of the emulsion with the core-shell structure, titanium white powder, a filler, a dispersing agent, a wetting agent, a defoaming agent, a thickening agent, a bactericide, a mildew inhibitor, a pH regulator and water. The latex particles in the emulsion with the core-shell structure provided by the invention have a soft-shell hard-core structure, wherein soft shells can ensure that the prepared coating product also has excellent low-temperature film forming property without the addition of a film-forming auxiliary agent, and hard cores can ensure that the prepared coating product has high hardness after film formation of the coating product, does not turn soft or sticky at a high temperature, and still has the basic properties of excellent stain resistance, washing resistance and the like. The environment-friendly interior wallcoating provided by the invention does not contain volatile organic compounds (VOC), is safe and environmentally friendly, and has high hardness and excellent stain resistance and washing resistanceafter the film formation.

The invention relates to a method for preparing an alkali type copper molybdate microsphere having a surface nano-whisker structure. The method comprises the following steps of: (1), dropwise adding copper salt solution into molybdate solution, wherein the mol ratio of copper salt to molybdate is 1:1; (2), adjusting the pH of a mixed system obtained in the step (1) to 6, transferring the mixed system into a reaction kettle, stirring magnetically and ultrasonically so that the mixed system is uniformly dispersed, and keeping the temperature at 50-110 DEG C for 1-12h; and (3), cooling to room temperature by the end of the reaction, and centrifuging, washing, drying and collecting a sample so as to obtain the alkali type copper molybdate microsphere having the surface nano-whisker structure. Compared with the prior art, the method disclosed by the invention is simple in process, universal in preparation condition, steady in product morphology, high in purity and simple in product treatment, and is applied to medium-scale industrial production.

The invention provides a novel production technology for producing sodium fluoride and white carbon black in a co-production mode by using fluorosilicic acid. The fluorosilicic acid, water glass (sodium silicate) and sodium carbonate are used as main raw materials to produce high-purity silicon dioxide and sodium fluoride in the co-production mode, waste sodium fluoride mother liquor for producing the sodium fluoride is repeatedly used, waste water processing pressure of white carbon black enterprises and sodium fluoride enterprises is greatly relieved, cost of the raw materials of the sodium fluoride and the white carbon black is greatly reduced, and the revenue of the odium fluoride enterprises and the white carbon black enterprises is greatly improved.

The invention discloses a nanometer titanium dioxide cotton fiber modifying method with improved dyeing property and attachment firmness. The nanometer titanium dioxide cotton fiber modifying method comprises the following specific steps of: firstly, carrying out pretreatment on cotton fibers; secondly, configuring a modifying solution and carrying out modifying treatment on the cotton fibers by adopting a hydro-thermal method; and thirdly, carrying out post treatment on the modified cotton fibers. According to the nanometer titanium dioxide cotton fiber modifying method disclosed by the invention, the problems of poor dyeing properties of the nanometer titanium dioxide coated cotton fibers and low attachment firmness of nanometer titanium dioxide and cotton fibers are solved and the cotton fibers are endowed with the performances of ultraviolet resistance and bacteria resistance.