368 results about "Gas liquid reaction" patented technology

A process for performing a chemical reaction between a plurality of chemical reactants in the presence of a catalyst, with at least a first reactant in a liquid phase and at least a second reactant in a gas phase, the first and second reactants mixing at least by interdiffusion. The process comprises supplying the reactants to a passage defined by a first surface and a second surface and optionally moving at least one of the first surface and second surface relative to each other. The reactants their mixture or reaction products form respective boundary layers against the first and second surfaces and the radial spacing between the first surface and second surface is equal to or less than the back-to-back radial thicknesses of the boundary layers.

A reactor produces a gas-in-liquid emulsion for providing increased interfacial contact area between the liquid and the gas for improved reaction of the gas with the liquid, or more rapid solution or reaction of a difficulty soluble or immiscible gas in or with a liquid. The reactor is suitable for a continuous or batch type process. Rotor and stator cylindrical members are mounted for rotation relative to one another and have opposing surfaces spaced to form an annular processing passage. The gap distance between the opposing surfaces and the relative rotation rate of the cylindrical members are such as to form a gas-in-liquid emulsion of the gas in the liquid. The liquid and gas pass through the processing passage, changing into the gas-in-liquid emulsion.

The invention relates to a method for preparing a polyacrylonitrile carbon fiber precursor. The method comprises the following steps of: copolymerizing acrylonitrile and copolymerization components in multicomponent solution so as to form polymer spinning stock solution which has a relatively uniform and controllable molecular structure, performing demonomerization on the spinning stock solution,defoaming, filtering, and preparing the polyacrylonitrile carbon fiber precursor by a dry-jet wet-spinning process. The key technology of the method is that: a gas storage box is arranged on a dry wet spinning pack, the gas storage box and the liquid level of coagulating bath fluid form a dry-jet wet-spinning air layer into a confined space, and ammonia is persistently aerated into the space to carry out gas-liquid reaction with spinning solution trickle in the air layer. The polyacrylonitrile precursor prepared by the method has regular sections and few defects, the density is not less than 1.187g/cm<3>, the density after carbonization is not less than 1.79g/cm<3>, the strength is not less than 5.1GPa, and the modulus of elasticity is 280 to 300GPa.

The invention belongs to the technical field of nitrobenzene wastewater, in particular relates to a method and device for adsorbing, reducing, oxidizing and degrading nitrobenzene wastewater, and solves the problem of the existing method for degrading nitrobenzene wastewater. The method comprises the following steps of performing a reduction reaction on nitrobenzene wastewater in a micro-electrolysis bath; performing a sufficient contact reaction with ozone in gas-liquid reaction equipment; further degrading pollutants in the wastewater in the gas-liquid reaction equipment; and circularly treating the wastewater in the micro-electrolysis bath and the gas-liquid reaction equipment. The device comprises a rotary packed bed device, wherein a gas inlet is connected with an ozone generator; and a liquid inlet and a liquid outlet are connected with the micro-electrolysis bath. The method and the device have the beneficial effects that the process flow is simple and convenient to operate; the advantages of various technologies are given a full play by coupling the three technologies to reach the aim of treating waste by using waste, so that the treatment cost can be furthest reduced.

The invention relates to a method for preparing a nano material, which comprises the step of: preparing a nano material precursor and a nano material. The method for preparing the nano material precursor comprises the step of: placing reacting raw materials in a supergravity filed reactor for gas-liquid reaction or liquid-liquid reaction to obtain the nano material precursor. The method for preparing the nano material comprises the step of heating and roasting the nano material precursor with a microwave field to ensure that the nano material precursor generates decomposition or recrystallization to obtain the nano material. The method for preparing the nano material precursor also comprises the step of: in a process of accelerating and enhancing the mass transfer with the supergravity filed, enabling a metal salt water solution in the reactor to be uniformly mixed with a liquid precipitator or gas precipitator in a molecule size manner for chemical reaction to obtain the nano material precursor of carbonate materials or nano oxyhydrate materials or hydrous oxide materials of the metal, wherein the prepared nano material is used as a nano metal oxide. The method has the advantagesof scientific and reasonable structure, high quality of products, energy saving, no secondary pollution and the like.

The invention relates to a method for enhancing a gas-liquid process in a micro-reactor. The method comprises the following steps: applying ultrasound of a specific frequency to a gas-liquid micro-reactor in which gas liquid two-phase flow is bubble flow, slug flow, slug annular flow, stirring flow or annular flow; and regulating and controlling the transverse equivalent diameter of a gas phase in the gas-liquid two-phase flow and the ultrasonic frequency till a product of the ultrasonic frequency and the transverse equivalent diameter of the gas phase is up to 1-40 mm.kHz. According to the method, disturbance and acoustic streaming are caused in liquid by using the ultrasound and the cavitation effect of the gas phase, so that gas-liquid mass transfer is enhanced; and meanwhile, agglomeration between a solid or a sticky substance in fluid or the adhesion to the wall surface of a micro channel can be broken, so that blockage is prevented and dredged. The method for enhancing the gas-liquid process disclosed by the invention is suitable for the fields of various gas-liquid reactions, gas absorption, gas separation and purification, and the like.

The invention relates to a gas liquid reaction kettle adopting a spherical crown-shaped micropore corundum gas supply apparatus. The gas liquid reaction kettle comprises a reaction kettle body and a gas supply device, the reaction kettle body comprises a main kettle body, the gas supply device comprises the gas supply apparatus, the gas supply apparatus is arranged in the main kettle body, and thetop surface of the gas supply apparatus is a spherical surface; the gas supply apparatus is in a spherical crown shape and is of an integrated structure, and upper and lower surfaces of the gas supply apparatus release gas simultaneously; the gas liquid reaction kettle has the advantages of a large gas supply amount, high stirring intensity, low resistance, high efficiency, low consumption, reliable operation, no blockage, ageing resistance, corrosion resistance, long service life and the like; in addition, the superficial area of contact between gas and liquid is greatly increased through alarge number of fine bubbles, the reaction speed is increased, and the reaction efficiency is improved; in addition, during gas supply, a high self-stirring effect of a large number of small bubbles is achieved, a stirring device of a conventional gas liquid reaction kettle does not need to be arranged, the structure can be simplified, the cost is reduced, and if the stirring device is arranged, the speed and efficiency of a gas liquid reaction can be further improved.

The invention discloses a Venturi type micro-bubble generator and a gas-liquid reactor, and belongs to the field of micro-bubble generators. The purpose of the invention is to overcome the disadvantages of large manufacturing difficulty, discrete bubble size and high energy consumption in the prior art. The Venturi type micro-bubble generator is composed of a swirling device, an air inlet hole anda Venturi tube, and the Venturi tube sequentially least comprises a converging section, a Venturi tube section and a diverging section from bottom to top. The Venturi type micro-bubble generator hasthe advantages of compact structure, low energy consumption, good micro-bubble generation effect, and convenience in maintenance. After the micro-bubble generator is used in the gas-liquid reactor, the gas-liquid mass transfer efficiency is greatly improved.

The invention discloses a method for preparing an isocyanate monomer. The method comprises the following steps: adding a first batch of solvents in a reaction kettle and circulating; compressing HCl, conveying HCl in a salt-forming reaction kettle through the outer tube of a mixer, carrying out gas-liquid separation and then circulating HCl in a system through a Venturi mixer; mixing diamine with the residual solvents in the inner tube of the mixer, then mixing the mixture with HCl in the outer tube, and then conveying the mixture in the salt-forming reaction kettle and reacting to obtain a diamine hydrochloride solution; reacting the diamine hydrochloride solution with phosgene under a pressurization condition to obtain an isocyanate photochemical solution. The mixer comprises the inner tube and the outer tube, wherein a spiral plate is installed in the thick-diameter part of the inner tube, a hole is formed in the tube wall of the thin-diameter part of the inner tube, and the bottom of the inner tube is a detachable bottom plate; the outer tube sleeves outside the inner tube, and the bottom of the outer tube is a mixer outlet. The method disclosed by the invention reinforces the mixing effect of the gas-liquid reaction, the obtained hydrochloride particles are uniform, the use efficiency of HCl is high, the energy consumption is low, and the purity of the photochemical solution after a phosgenation reaction is high.

The invention discloses a micro-bubble generation device which aims at solving the defects of high energy consumption and few produced micro-bubbles in the existing device. The micro-bubble generation device comprises an outer sleeve and a core pipe arranged in the outer sleeve, wherein the core pipe comprises a water suction pipe section, at least one micro-bubble generation pipe section I and a micro-bubble injection pipe section; and the micro-bubble injection pipe section comprises a micro-bubble generation pipe section II at a water inlet end, and a loudspeaker-shaped injection pipe which is connected with the micro-bubble generation pipe section II and is positioned at a water outlet end side. The micro-bubble generation pipe sections I and II respectively comprise at least one gas introduction hole and at least one cutting groove. The micro-bubble generation device is used for providing a large number of micro-bubbles in water bodies in purifying tanks, baths, aquiculture pools, sewage treatment plants and the like or liquid in gas-liquid reaction tanks.

A tube bundle falling film microreactor for performing gas-liquid reactions, which has: a) at least one vertical tube with b) a device for distributing the liquid on the inside of the tube and c) a liquid collecting system, and d) a device for gas supply and removal, and use thereof.

The invention relates to the field of synthetic equipment and provides a micro-channel reaction system. The micro-channel reaction system comprises a micro-channel reaction device, a gas conveying device for introducing gas into the micro-channel reaction device, two or more liquid conveying devices for introducing liquid into the micro-channel reaction device, a gas-liquid separation device communicated with the micro-channel reaction device, and a sampling device. According to the micro-channel reaction device, different types of synthetic reactions such as gas-liquid reaction and liquid-liquid reaction can be produced; moreover, highly corrosive and strongly exothermal reactions of hydrogenation, oxidation, fluorination, bromination, nitration, sulfonation and the like can be produced by the micro-channel reaction device; in addition, the reaction system is simple in structure and easy to realize, and can meet the needs of small-amount process development research and pilot test.

A method and a device for the sulfonation or the sulfation of organic liquid raw materials with an SO₃/air mixture and other reaction gases in order to perform rapid, highly exothermic gas-liquid reactions in conventional thin-layer falling-film reactors are disclosed. The introduction of the SO₃/air mixture occurs through several feed locations, which are located within (along) the reaction tube or reaction tubes or in the annular gap of annular-gap falling-film reactors. High peak temperatures, undesirable byproducts, worsening of the color and local oversulfation or oversulfonation, which leads to side reactions, are largely avoided.

A method for strengthening mixing and reaction of fluids in a micro-reactor includes that various fluids flow through a micro-reactor firstly, are mixed in the micro-reactor and complete partial reaction, a mixed fluid including reactants and products is formed, and the mixed fluid flows out of the micro-reactor and then further flows through a tubular reactor filled with an internal component; the micro-reactor has a stacked type parallel structure and has channels with the characteristic scale of 0.1-2 mm; the tubular reactor is directly connected with the micro-reactor, and the internal component is a mesh-structural foam metal, foam ceramic or quartz filler. The additional resistance formed by the tubular reactor is used for strengthening mixing of the fluids in the micro-reactor, and at the same time, the internal component in the tubular reactor can make the mixed fluid further subjected to reaction. The method is suitable for a gas-liquid reaction process and a liquid-liquid reaction process.

The invention relates to the technical field of environment protection and discloses a device for processing boat exhaust gas, which comprises a water pump, an electro-catalysis processing unit, a storage tank, an atomization device, a gas-liquid reaction device, a solid-liquid separation device, a condensation and reflux device, an exhaust gas inlet and a pump. The water outlet of the water pump is connected with the electro-catalysis processing unit which is connected with the storage tank; one end of the pump is connected with the storage tank, and the other end is connected with the atomization device which is connected with the liquid inlet end of the gas-liquid reaction device; the exhaust gas inlet is connected with the gas inlet end of the gas-liquid reaction device; the gas outlet end of the gas-liquid reaction device is connected with the condensation and reflux device which is provided with a gas exhaust port at the upper end; and the liquid output end of the gas-liquid reaction device is connected with the input end of the solid-liquid separation device which is provided with a solid discharge port and a liquid discharge port. The invention further discloses a method for processing the exhaust gas. The invention has the advantages of low energy consumption, high efficiency, convenient installation and simple operation, the resultants from the reaction are pollution-free, and the exhaust gas removal effect is better.

The invention discloses a method for extracting magnesium and lithium from brine. The method comprises the steps of introducing brine containing magnesium into a gas-liquid reaction kettle or an absorption tower, reacting with gas containing carbon dioxide at the pressure of 1x105-1x107Pa and the temperature of 80 DEG C below zero to 200 DEG C so that the brine can absorb enough carbon dioxide to generate magnesium carbonate precipitate, filtering and separating mother liquor to obtain the crude product mainly containing the magnesium carbonate. The invention has the following characteristics: extra precipitator is not needed; the gas containing carbon dioxide can be tail gas and other secondary products after combustion of fuel; the cost of the reagent is low; the element of magnesium without high value is developed into the product so as to greatly increase the value of a salt lake and solve the pollution of the low-cost magnesium to the environment; the energy consumption is low and the tail gas after combustion of fuel is recycled, which is very environmental-friendly.

The invention discloses a preparation method of a low-cost cadmium phosphide quantum dot material. The preparation method comprises the following steps: based on a cheap cadmium compound such as cadmium oxide, cadmium acetate or cadmium cetylacetonate and the like as a raw material, dissolving the cadmium compound and long-chain fatty acid in octadecylene at a high temperature so as to prepare a long-chain fatty acid salt of cadmium; or dissolving cadmium cetylacetonate in organic amine, and then carrying out a gas-liquid reaction based on hydrogen phosphide as a phosphorus source so as to prepare the high-quality cadmium phosphide quantum dot luminescent material. According to the invention, a cheap and continuously operable synthesis method is provided for the cadmium phosphide quantum dot material, and a solid foundation is provided for industrialized production of the cadmium phosphide quantum dot material; and through controlling factors such as reaction temperature, time and the like, the luminescence of the cadmium phosphide quantum dot material can be achieved in a wide region ranging from visible light (460nm) to infrared light (1500nm).

The invention describes a stirring device made from a gassing stirrer and a liquid mixer or two liquid mixers, which are arranged on a shaft and each have a feed and at least one exit opening, wherein the exit openings of the gassing stirrer and of the liquid mixer or the liquid mixers are at a distance from one another, the ratio, a/d, of the distance, a, between the exit openings to the diameter, d, of the gassing stirrer or liquid mixer being 0.02 to 0.5 and the ratio, b/d, of the distance, b, between the outer edges to the diameter, d, of the gassing stirrer or liquid mixer being 0.01 to 0.4.

The present invention relates to a self-suction inner recycling super-gravity field gas-liquid reactor, which comprises a reactor container body, a dynamic rotor, a stator, a guide cylinder, a gas inlet pipe, a drive mechanism and a sealing mechanism. High-speed rotation produced by the drive mechanism drives the rotor to produce high centrifugal force, thus ensuring that the liquid in the container is thrown out by rapid centrifugation; the rotor center opposite to the air inlet pipe is vacuum, so that the gas is automatically suctioned from the lower part and the liquid is suctioned from the upper part at the same time; the gas phase and the liquid phase flow in the high turbulence in the rotor and are limited by the stator provided with small holes; the gas phase and the liquid phase carry out the super-gravity contact in a rotating chamber and are ejected out from the small holes of the stator after high-intensity physical mass transfer and chemical reaction are achieved; the two phases are mightily dispersed to form a large contacting area and further reacted in the container; the liquid at the proper position of the upper part of the container is suctioned into the rotor through the guide cylinder, thus forming the inner liquid recycling. The reactor can be widely applied in the fields of chemicals, petroleum chemicals, environment, pharmacy, light industry, etc. as well as gas-liquid reaction.

The invention discloses a stirring grinding reactor and a method thereof for preparation of isocyanate. The reactor is provided with dynamic rotation slices and static rotation slices in a mutual spacing manner; the dynamic rotating slices and the static rotation slices are provided with channel holes, the dynamic rotation slices each have a saucer-shaped structure having a serrated surface, and the static rotation slices have the structure complementary with that of the dynamic rotation slices. A special stirring structure of the reaction kettle can avoid hydrochloride caking, and increases the salifying concentration and the diamine conversion rate. A gas-liquid reaction effect is strengthened, the temperature control of the system is stable, obtained hydrochloride granules are exquisite, the reaction time can be shortened during a liquid phase phosgenation reaction, the product yield is improved, at the same time, blocking of salifying equipment can be reduced, the equipment can be allowed to perform long-term stable running, the equipment structure is concise, and large-scale industrialized application is convenient.

The invention provides a nitrogen dioxide detecting device and method. The nitrogen dioxide detecting device comprises a first cover plate and a second cover plate; a sealed reaction cavity is formed between the first cover plate and the second cover plate, and is internally provided with a hydrophilic film which is pasted on the first cover plate; the first cover plate is also provided with a gas intake channel and a gas exhaust channel which are communicated with the reaction cavity and are positioned at two sides of the hydrophilic film; the first cover plate is also provided with a liquid intake channel and a liquid exhaust channel which are communicated with the reaction cavity; the hydrophilic film covers ports of the liquid intake channel and the liquid exhaust channel; the second cover plate positioned in the reaction cavity is also provided with an observation window; a glass sheet is also arranged between the observation window and the reaction cavity; the observation window is internally provided with a photoelectric sensor. Light generated by the gas-liquid reaction is detected through the photoelectric sensor so as to obtain the concentration of carbon dioxide, and the detection accuracy and the detection reliability of the nitrogen dioxide detection device are improved.