368results about "Pressurized chemical process" patented technology

The invention discloses a method for preparing micro-nano magnesium hydride powder, which comprises the following steps: in a vacuum environment I, heating a magnesium raw material to form magnesium steam, and simultaneously introducing trace carrier gas I; in the vacuum environment II, magnesium steam is conveyed through the trace carrier gas I to be mixed with the carrier gas II to form mixed gas, meanwhile, the mixed gas is made to rapidly flow through the injection evacuator, the magnesium steam is cooled and hydrogenated, and the micro-nano magnesium hydride powder is formed. Compared with the prior art, the gasification efficiency of magnesium is higher, the magnesium is taken away by airflow, residues in an evaporation chamber are less, the utilization rate of the magnesium is high, produced magnesium powder is directly brought into the next link through hydrogen carrier gas, the processes of passivation, bin opening, powder taking and the like are omitted, magnesium powder conveying is more efficient and safer, and the production cost is reduced. Through the pre-hydrogenation of the magnesium powder and the shearing action of the carrier gas of the high-speed hydrogen, the generated magnesium powder particles are smaller, the magnesium hydride powder particles generated after hydrogenation are smaller, the activity is better, and the technical process is easier to realize large-scale amplification and automatic control.

Pressure lock and extruding apparatus for high pressure extrusion with a pressure lock.

A device and method for preparing high-purity metals by vacuum distillation and bidirectional step condensation, the device comprising an atmosphere control device, a vacuum distillation device, a charging device, an intelligent control device, and an exhaust gas treatment device. The atmosphere control device comprises a nitrogen bottle and a control valve located above the bottle mouth for controlling the opening and closing of the nitrogen bottle. The vacuum distillation device comprises a vacuum distillation device and a vacuum pump connected to the vacuum distillation device via a pipeline. The charging device is located in the middle of the vacuum distillation device, and the intelligent control device is connected to the vacuum distillation device. The exhaust gas treatment device comprises an impurity removal device. The vacuum distillation device is provided with a plurality of heaters, which are arranged in parallel along the length direction of the charging device and the condensation zone on both sides of the vacuum distillation device. The present invention also includes a method for preparing high-purity metals using the device. The device of the present invention has a simple structure, is not restricted by the gravity field, is convenient for sampling, and has high impurity removal efficiency.

The present invention relates to reactors and reactor components which have good resistance to NH3 and N2 and possibly to H2O at high temperatures and moderate pressures and thus can be used in industrial-scale reactions for the catalytic decomposition of NH3 into N2 and H2.

The present invention provides a method for producing olefins by catalytic dehydrogenation of alkanes and an apparatus. The apparatus comprises a reaction unit, a regeneration unit, and a product separation unit; the reaction unit comprises a pre-lift zone, an oil agent contact zone, a reaction zone, a product quenching zone, a reactor outlet zone, an oil agent separation zone, and a stripping zone. The oil agent contact zone is provided with a feeding distributor and a catalyst distributor, and an oil agent contact space is formed between the feeding distributor and the catalyst distributor, enhancing countercurrent contact between an alkane and a catalyst, and better facilitating the initiation of a catalytic dehydrogenation reaction. By bringing an alkane feedstock into contact with a catalyst and then leveraging the shape and parameters of the reactor, the present invention provides a proper reaction environment for a catalytic dehydrogenation reaction, thereby facilitating the catalytic dehydrogenation reaction, and improving the alkane conversion rate. In addition, the method and the apparatus of the present invention allow for alkane dehydrogenation reactions to be conducted under negative pressure, resulting in good safety and further improving alkane conversion rates and olefin selectivity.

1. A method for treating a material comprising at least one organic compound capable of releasing undesirable anions during thermal and / or chemical and / or physical treatment, comprising at least one step in which the material is contacted with a dense pressurized aqueous medium (particularly subcritical or supercritical) or a pressurized aqueous medium in the form of steam in the presence of a material reactive to the undesirable anions and capable of fixing the undesirable anions in its structure, whereby the organic compounds are destroyed and at least partially mineralized; and at the same time, the undesirable anions are released and immediately captured by a solid material reactive to the undesirable anions and then fixed, producing an aqueous solution free of undesirable anions.

A system and method for oxidative dehydrogenation including a first reactor having a first ODH catalyst to dehydrogenate an alkane to a corresponding alkene at a first temperature and facilitate generation of steam, a second reactor having a second ODH catalyst to dehydrogenate alkane in a first-reactor effluent to the corresponding alkene at a second temperature that may be greater than the first temperature and facilitate generation of steam, and a third reactor having a third ODH catalyst to dehydrogenate alkane in a second-reactor effluent to the corresponding alkene at a third temperature that may be greater than the first temperature or the second temperature and facilitate generation of steam.

This disclosure relates to a polymer composition comprising at least 95% by weight of post-consumer recycled polypropylene resin based on the total weight of the polymer composition, preferably a melt-processed polymer composition, wherein the ethylene content (C2(CF)) of the crystalline fraction (CF) is in the range of [C2-3.4] to [C2-0.2] by weight, preferably [C2-3.0] to [C2-0.6] by weight, more preferably [C2-2.4] to [C2-1.2] by weight, based on the total weight of the crystalline fraction of the polymer composition as measured by the Crystex analysis described herein; and the total light transmittance measured according to ASTM D1003-13 for a 60 × 60 × 1 mm compression-molded plaque is in the range of 60 to 100%, preferably 65 to 90%, more preferably 70 to 85%. This disclosure further relates to the use of the polymer composition in the manufacture of articles and each article.

The utility model provides a vacuum collecting device for polytetrahydrofuran production, and relates to the technical field of polytetrahydrofuran production devices. The vacuum collection device for polytetrahydrofuran production comprises an alcoholysis system, a first neutralization system and a second neutralization system which are connected with a discharge tank, a first vacuum assembly is arranged between the alcoholysis system and the discharge tank, and a second vacuum assembly is arranged between the first neutralization system and the discharge tank. A vacuum assembly III is arranged between the neutralization system II and the discharge tank, and the discharge tank is also connected with a nitrogen pipeline. The device can realize continuous discharge of materials without intermittent discharge, reduces workload, saves time and labor, does not affect vacuum of each system, and ensures normal work of each system.

The invention relates to a method for producing methylamine by a generally exothermic gas-phase reaction of methanol and ammonia as reactants in the presence of a heterogeneous catalyst at a pressure in the range of 15 to 35 bar. The reactants are evaporated in one or more heat exchangers and superheated prior to being fed to the reactor, wherein the heat exchangers in turn are heated with a stream of hotter product gas from the reactor. In addition to methylamine (monomethylamine, dimethylamine, and trimethylamine), the product gas stream contains unconverted reactants, water, and any other reaction by-products. To control the reactor inlet temperature and limit it to a temperature in the range of 350 DEG C to 410 DEG C, a suitable quenching liquid is introduced into the hot product gas stream prior to feeding the hot product gas stream to a heat exchanger for heating the reactants. Evaporation and overheating of the added quenching liquid removes the corresponding amount of energy extracted from the hot product gas stream, with the result of efficient and rapid cooling of the hot product gas stream. As a result, the temperature difference between the cold side and the hot side of the heat exchanger is small, which means less energy is transferred to the reactant stream, and thus its reactor inlet temperature can be adjusted or limited.

The application discloses a preparation method of a nickel-doped and high-hydrated cobalt-chromium-iron ore monocrystal under high temperature and high pressure, and the method comprises the following steps: preparing a cylindrical cobalt-chromium-iron ore sample by taking solid basic cobalt carbonate powder, solid chromium (III) acetate hydroxide crystal powder, solid nickel stearate, solid oxalic acid powder, solid chromium hydroxide powder, solid nickel hydroxide powder and liquid dilute nitric acid as starting raw materials; preparing water source sheets by taking chromium hydroxide powder and nickel hydroxide powder in a weight ratio of 4:1; placing two water source sheets at two ends of the cylindrical cobalt-chromium-iron ore sample respectively and then putting them into a double-capsule structure sample bin; and obtaining a cobalt-chromium-iron ore monocrystal after high-temperature and high-pressure reaction, so that the blank of the preparation technology of the nickel-doped and high-hydrated cobalt-chromium-iron ore large-grain monocrystal under the current high-temperature and high-pressure condition is solved, and the experimental sample of the nickel-doped and high-hydrated cobalt-chromium-iron ore large-grain monocrystal is obtained.

The invention relates to a device for carrying out chemical and physical processes, wherein at least two nozzles, each with an associated pump and supply line, are provided for spraying a liquid medium into a reactor space enclosed by a reactor housing onto a common collision point, wherein an outlet opening is provided for removing the resulting products and excess gas from the reactor housing. Within the scope of the invention, it is proposed that the reactor space enclosed by the reactor housing not taper toward the outlet opening for removing the resulting products and excess gas from the reactor housing. This advantageously minimizes the settling of material on the inner wall of the reactor housing.

The utility model relates to the field of disinfectant production and processing, in particular to an online chlorine dioxide generator. The utility model provides an on-line chlorine dioxide generator capable of enabling reaction ions to fully collide to participate in reaction. The chlorine dioxide on-line generator comprises a reaction kettle and a PLC (Programmable Logic Controller), and the PLC is arranged at the upper part of the front side of the reaction kettle; the PLC is connected with all the mechanisms through the wires; the two sides of the reaction kettle penetrate through the kettle wall and are provided with the vibration mechanisms capable of enabling reaction liquid in the reaction kettle to collide with each other through vibration; the upper parts of the left side and the right side of the reaction kettle penetrate through the kettle wall and are provided with the electric control proportional valves capable of accurately controlling the total amount of reaction raw materials and the ratio of the raw materials. During use, the electronic control proportional valve accurately controls the total amount and proportion of raw materials, and meanwhile, the vibration mechanism drives reaction liquid in the reaction kettle to collide with each other, so that the reaction degree within a certain time is improved.

The utility model discloses a high-pressure reaction kettle discharge pipe anti-blocking structure which comprises a mounting structure, an ultrasonic transducer and a driving structure, the mounting structure is arranged on one side of a discharge pipeline and comprises a mounting channel and a mounting part, the mounting channel is communicated with the interior of the discharge pipeline, and the mounting part is slidably arranged in the mounting channel; the ultrasonic transducer is mounted on the mounting piece; and the driving structure is connected with the mounting part and is used for driving the mounting part to slide in the mounting channel, so that the ultrasonic transducer is mounted on the inner wall of the discharging pipeline in an abutting manner. According to the high-pressure reaction kettle, adhesion and accumulation of materials in the pipeline can be effectively reduced, so that the risk of blockage of the discharge pipe of the high-pressure reaction kettle is reduced.

The utility model discloses compatible high-viscosity semi-continuous polyester production equipment which is characterized in that a titanium and antimony catalyst, CHDM / NPG, EG and BDO injection port is formed in the top of a slurry preparation tank, an outlet of the slurry preparation tank is connected with an inlet of a first esterification kettle through a slurry pump or directly connected with the inlet of the first esterification kettle, and an ester and titanium catalyst injection port is further formed in the top of the first esterification kettle; one path of a material outlet of the first esterification kettle extends to the bottom of the kettle and is provided with a first electric valve, the other path of the material outlet of the first esterification kettle extends to the middle of the kettle and is provided with a second electric valve, and outlets of the two electric valves are connected in parallel and then are connected with a feeding hole of a second esterification pre-polycondensation kettle through a filter; the top of the second esterification pre-polycondensation kettle is also provided with a stabilizer, a polycondensation catalyst and a nitrogen injection port; a material outlet of the second esterification pre-polycondensation kettle is connected with an inlet of the polycondensation kettle through a pre-polycondensation gear pump and a filter; and a material outlet of the polycondensation kettle is connected with granulator granulation equipment through a polycondensation gear pump. The equipment can realize product diversification and differentiation, and is high in compatibility, high in productivity and high in viscosity.

1,2-propanediol is prepared by a process comprising the steps of: step a) reacting propene with hydrogen peroxide in the presence of a catalyst mixture comprising a phase transfer catalyst and a polytungstophosphate at 50-110°C in a liquid reaction mixture comprising an aqueous phase having a maximum apparent pH of 6 and an organic phase; step b) separating the reaction mixture into an aqueous phase (P a ) and an organic phase (P o ) comprising 1,2-propanediol; step c) recycling at least a portion of the separated organic phase (P o ) to step a); step d) recovering 1,2-propanediol from the aqueous phase (P a ); and step e) reacting a tungstate with hydrogen peroxide and phosphoric acid in the presence of a phase transfer catalyst in a liquid mixture comprising an aqueous phase and an organic phase at 5-40°C, followed by passing at least a portion of the resulting organic phase comprising polytungstophosphate and phase transfer catalyst to reaction step a).

The invention discloses a reaction system for producing hydrogen through coal supercritical water gasification. The reaction system comprises a vertical tank body, a heat insulation lining, a gas collection chamber, a separator, a slag collection chamber, a coal water slurry distribution pipe and an inlet diffuser, the separator is arranged between the gas collection chamber and the slag collection chamber, an upper exhaust port of the separator is communicated with the gas collection chamber, and a lower slag discharge port of the separator is communicated with the slag collection chamber; an ash inclined pipe at the lower part of the slag collecting chamber extends out of the vertical tank body to form an ash outlet; the coal water slurry distribution pipe is an annular pipe, and coal water slurry distribution holes are formed in the coal water slurry distribution pipe; the inlet diffuser is mounted at the bottom head of the vertical tank body; the inlet end of the supercritical water inlet pipe extends out of the bottom head of the vertical tank body to form a supercritical water inlet; a coal water slurry inlet is formed in the coal water slurry distribution pipe; a gas outlet is formed in a top sealing head of the vertical tank body; the lower end of the gas outlet is communicated with the gas collecting chamber. According to the invention, coal is gasified in a supercritical water environment to generate hydrogen, so that clean utilization of coal is realized; uniform heat supply of supercritical water to gasification reaction can be realized, and high-efficiency gasification of coal under large treatment capacity is realized.

The invention discloses a supercritical carbon dioxide fluid tissue decellularization reaction kettle, system and method based on hydrodynamic eddy current self-generating effect, the reaction kettle comprises a kettle cover, a hoop and a pressure-bearing kettle body, and the pressure-bearing kettle body and the kettle cover are fixed through the hoop; a porous tissue support comprising a top porous plate and a bottom porous plate is arranged in the reaction kettle, an internal space is formed after the bottom and the top porous plate are fixed, the vortex assisting device and the tissue cage are detachably fixed in the internal space, and the tissue cage is arranged below the top porous plate and above the vortex assisting device; the supercritical carbon dioxide fluid enters the reaction kettle to impact the vortex-assisting device, and the vortex-assisting device guides the supercritical carbon dioxide fluid upwards and forms a local recirculation vortex in the tissue cage. The supercritical carbon dioxide fluid is used as a treatment medium, the decellularization efficiency and quality are improved by optimizing fluid dynamics in the reaction kettle and integrating system circulation, and the efficient, uniform, large-scale, low-cost and environment-friendly decellularization process is realized.

The invention discloses a desorption and separation device and a desorption and separation method for substances in a material, and belongs to the technical field of impurity desorption, and the desorption and separation method comprises the following steps: obtaining absorption wavelengths, half-peak widths and relative intensities of all binding bonds between a target material and a specific substance, and obtaining binding bond energy between the target material and the specific substance; an irradiation generating device is adopted to irradiate a target material, energy emitted by the irradiation generating device is radiation or radiation combination equal to binding bond energy between the target material and a specific substance, and the specific substance and the target material are removed. According to the method for desorbing and separating the substances in the material, the energy of the binding bond between the target material and the specific substance is obtained, the radiation energy is accurately provided by utilizing the radiation generation device, the accurate cutting of the binding bond between the target material and the specific substance is realized, and on the premise that the phase change of the material is not influenced and the performance of the material is not damaged, the separation efficiency is improved. And efficient desorption of a target material and a specific substance is realized.

The utility model discloses a pyridine base synthetic production device belongs to pyridine base synthetic technical field, including first preheater and second preheater, first preheater and second preheater all are connected with mixer, the air inlet of mixer is connected liquid nitrogen tank, the discharge port of mixer is connected fixed bed reactor, the discharge port of fixed bed reactor is connected absorption tower, absorption tower is connected extraction column through the pipeline, the first rectifying column is connected through the pipeline to extraction column, the first rectifying column is connected through the pipeline to second rectifying column. The utility model can solve the problem that the existing reaction byproduct is more and miscellaneous, and is not easy to separate. The utility model can reduce the treatment of waste gas, promote the full mixing of feed liquid and extraction liquid, improve extraction efficiency and separation effect, improve the production capacity of extraction tower, reduce the steam energy consumption required for rectification, realize pyridine recovery, improve product separation efficiency and reduce production cost.

A reactor for coating particles includes a rotatable reactor assembly including a drum configured to hold a plurality of particles to be coated, an inlet tube, and an outlet tube, a stationary gas inlet line coupled to the inlet tube by a rotary inlet seal, a stationary gas outlet line coupled to the outlet tube by a rotary outlet seal, and a motor to rotate the rotatable reactor assembly.

In the valve assembly, the inner wall of the valve body includes at least one opening for introducing liquid under pressure below the slurry or liquid outlet from the tube or pipe. The valve assembly is particularly useful for maintaining a semi-continuous or continuous pressurized flow of biomass from the extruder and for extending the reaction zone downstream from the extruder. The advantage of having an extended reaction zone is that it allows for complete processing of the material without causing additional wear on the extruder and also allows for upstream processing of the material in the tube or pipe.

Disclosed herein are methods for pasteurizing or sterilizing architectural coating compositions using high pressure processing (HPP) with or without heat, radiation or other energy sources without additionally polymerizing the compositions, and storing same.

Provided is a method for producing purified carbon black with a reduced content of oxy-polycyclic aromatic hydrocarbons, which includes: (a) providing carbon black containing an initial content of oxy-polycyclic aromatic hydrocarbons of 1 ppm or more; (b) treating the carbon black containing the initial content of oxy-polycyclic aromatic hydrocarbons with an extractant containing carbon dioxide in a supercritical state to extract at least a part of the oxy-polycyclic aromatic hydrocarbons from the carbon black; and (c) removing the extractant containing the extracted oxy-polycyclic aromatic hydrocarbons from the carbon black to obtain purified carbon black containing an oxy-polycyclic aromatic hydrocarbon content lower than the initial content of oxy-polycyclic aromatic hydrocarbons. Further provided are carbon black obtained by the above production method and an article manufactured therefrom.

A high-pressure polymerization system having a) a polymerization reactor and b) a reactor blow down system having b1) a reactor blow down vessel, having a circular design over a major portion P having a L / D-ratio in the range from 1.75 to 10.0 and containing an aqueous quenching medium, b2) a release line connecting the polymerization reactor with the reactor blow down vessel and having an outlet located above a maximum level for the aqueous quenching medium, b3) a first emergency valve in the release line to open and close fluid communication between the polymerization reactor and the reactor blow down system, and wherein the release line outlet has a joining piece having an angle (α) between the central axis and a tangent at the reactor blow down vessel in the range from 5° to 70° and the reactor blow down vessel has a vent stack containing a constricted section.

Described is a chemical reactor (1), in particular of the batch type, comprising a body (2) defining a reaction space (V) for a chemical process, a head element (3) configured to seal the body (2), and a support base (5) designed to contain the body (2) and a plurality of discretization elements (4) fixed or capable of being fixed to the head element (3) and extending inside the body (2) according to a main direction of extension and configured to discretize the process action into subspaces (Vs) for releasing activation energy. The head element (3) is movable in such a way as to use the discretization elements (4) to form a controlled mixture of the reaction and a measurement of the solution, preferably a density measurement.

The invention belongs to the technical field of catalysts, and particularly relates to a carbon-coated metal oxide catalyst as well as a preparation method and application thereof. The method comprises the following steps: mixing biomass and enzyme-containing liquid, and carrying out enzymolysis treatment to obtain biomass subjected to enzymolysis treatment; enzymes in the enzyme-containing liquid comprise cellulase and xylanase; mixing the biomass subjected to enzymolysis treatment, metal salt and a nitrogen source, and sequentially performing pyrolysis in protective gas and annealing treatment in an air atmosphere to obtain a carbon-coated metal oxide catalyst; the pyrolysis comprises low-temperature pyrolysis and high-temperature pyrolysis in sequence; the temperature of the low-temperature pyrolysis is 350 to 450 DEG C; the temperature of the high-temperature pyrolysis is 700 to 800 DEG C. The carbon-coated metal oxide catalyst prepared by the invention has a multi-stage structure with a core metal oxide, a middle carbon branch channel and an outer layer N-doped charcoal, is large in specific surface area, has excellent structural uniformity and reactivity, and can improve the efficiency of biomass pyrolysis for hydrogen production.

The present application relates to the technical field of mineral processing, and particularly relates to a modified dodecylamine collector, a preparation method and application thereof.The preparation method of the modified dodecylamine collector provided by the present application comprises the following steps: carrying out glow discharge air plasma treatment on dodecylamine by taking air as a working gas.The present application introduces oxygen-containing and / or nitrogen-containing active groups on the surface of dodecylamine molecules by means of glow discharge air plasma modification of dodecylamine, and the dodecylamine is used for flotation separation of quartz and hematite, so that the adsorption capacity and selectivity of the dodecylamine to quartz, especially fine quartz, are enhanced, and efficient separation of quartz and hematite can be realized at a lower dosage; and the raw material of the preparation method is green and environmentally friendly, the modification process is low-temperature, safe and controllable, no by-product is generated, and the energy consumption is low.

The utility model discloses a dust-free discharging device of a double-cone rotary vacuum reactor, which comprises a dust hood, the dust hood is arranged at the top end of a rigid communicating pipe, the rigid communicating pipe is arranged along the vertical direction, the bottom end of the rigid communicating pipe is connected with the top end of a flexible communicating pipe, and the bottom end of the flexible communicating pipe is fixedly arranged on a sealing cover at the top of a collecting hopper. The bottom of the collecting hopper is connected with the input end of the conveying spiral cylinder, and a material waiting bin is installed below the output end of the conveying spiral cylinder. The side part of the rigid communicating pipe is connected with a lifting assembly; the lifting assembly can be used for buckling the dust removal cover on the outlet end of a discharge valve at the bottom of the double-cone reactor; a conical hole is formed in the dust removal cover, an annular clamping cavity is formed in the periphery of the conical hole, the annular clamping cavity and the conical hole are communicated through a plurality of evenly-distributed air suction holes, and a negative pressure connector communicated with the annular clamping cavity is installed on the side portion of the annular clamping cavity. The discharging device provided by the utility model ensures that no dust and raised dust are generated during discharging, and meanwhile, material loss and contamination are reduced.

The disclosure pertains to a coupled plant process for the production of urea and melamine, with a urea synthesis section with HP CO2 stripping, and with a part of the CO2 feed supplied to a recovery section.