1407results about "Distillation separation" patented technology

A process for upgrading plastic derived oil includes contacting the plastic derived oil with a mixed catalyst in a first reactor, where the mixed catalyst includes a decontamination catalyst and a cracking catalyst different from the decontamination catalyst. The first reactor reduces concentrations of halogen-containing compounds in the plastic derived oil. The process includes passing the first reactor effluent to a second reactor and contacting the first reactor effluent with the cracking catalyst to produce a second effluent comprising light olefins and naphtha range hydrocarbons. The process includes separating used mixed catalyst from the first reactor to produce a used decontamination catalyst and a second used cracking catalyst, and regenerating the decontamination catalyst and cracking catalyst in separate regenerators to reduce exposure of the cracking catalyst to halogen-containing compounds produced during regeneration of the used decontamination catalyst.

The present invention relates to the technical field of water distillers, and disclosed are a thermocompression multi-effect water distiller system and a control method therefor. The thermocompression multi-effect water distiller system comprises a distillation unit and a control unit; the distillation unit comprises a multi-effect evaporator; the multi-effect evaporator is a horizontal tube falling film evaporator and has a side-by-side configuration, and the shell pass of a preceding effect evaporator is communicated with the tube pass of a following effect evaporator; the control unit controls the distillation unit during working, and the control unit is a feedforward-cascaded fuzzy PID model predictive control system and comprises an inner-loop control system and an outer-loop control system; the inner-loop control system uses fuzzy PID control, and the inner-loop control system is provided with a control system for fluctuations in industrial steam pressure Psteam; and the outer-loop control system uses model predictive control. In the present invention, by using the thermocompression multi-effect water distiller system and the control method therefor, the heat exchange efficiency is greatly improved; and a novel control system is provided, enabling normal operation within a range of 40-200% of a set operating condition.

The utility model relates to a reaction device capable of quickly heating, cooling and maintaining temperature. According to the reaction device, a three-way valve temperature control device consisting of a set of thermal medium circulator, a set of cold medium circulator, a control unit and two temperature control adjusting motor control three-way valve rotating devices is arranged on the reaction kettle, so that the temperature of the reaction kettle of the reaction device can be increased or decreased within half a minute (even shorter time); the problem that the reaction kettle cannot be rapidly heated and cooled in the reaction process is solved; for heat absorption and heat release experiments, the dynamic balance of the temperature can be maintained by setting a fixed reaction temperature; installation is simple, and operation is convenient; the problem of waste of water resources is solved; the temperature control range is wide, and when a water medium is used, the temperature control range is 1-95 DEG C; when a silicone oil medium is used, the temperature control range is-50 to 250 DEG C; the rotatable distillation head is mounted at the upper part of the reaction kettle and is directly rotated during use, so that the functions of condensation reflux and distillation extraction can be simultaneously realized.

To provide a method for recovering oil from an oil-containing waste liquid, enabling efficient separation and recovery of oil from the oil-containing waste liquid through a solvent extraction method.SOLUTION: The method for recovering oil from an oil-containing waste liquid includes: an extraction step for extracting an oil-containing waste liquid using a solvent, thereby transferring oil in the oil-containing waste liquid to the solvent; a separation step for separating the solvent including the extracted oil and the waste liquid from each other; and an oil recovery step for separating and recovering the oil from the separated solvent-containing oil. In the method for recovering oil, the solvent is n-hexane, an oil concentration in the oil-containing waste liquid supplied to the extraction step is 1,000-5,000 mg / L, a volume ratio (solvent / waste liquid ratio) of the solvent to the oil-containing waste liquid is 0.01-0.05, and the oil concentration in the solvent containing the oil separated in the separation step is 4 mass% or more.SELECTED DRAWING: Figure 1

The utility model discloses a distillation retort for extracting polygonatum odoratum snow pear herbal drink, and relates to the technical field of distillation equipment, the distillation retort comprises a distillation heating retort main body, the top of the distillation heating retort main body is provided with a cover plate, a limiting rod penetrates through the inside of the cover plate, the outer wall of the cover plate is provided with a feed port, the outer wall of the cover plate is provided with a discharge port, and the discharge port is provided with a discharge port. And a sliding rod is mounted on the inner wall of the bottom of the cover plate. Through the arrangement of the sliding rod, the inductor, the sliding sleeve and the floating ball, when a raw material solution is added into the distillation heating tank main body through the feeding hole, the floating ball floats along with the surface of the raw material solution, and the liquid level in the distillation heating tank main body continuously descends through continuous distillation, and when the floating ball descends to the lowest point along with the liquid level, the floating ball is stopped. The floating ball is in contact with the inductor to trigger an alarm to remind a worker of shutdown or continuous addition of a raw material solution, so that dry burning in the distillation heating tank main body is avoided, and the safety of the distillation process of the distillation heating tank main body is improved.

The invention relates to evaporation and purification equipment for electronic grade hydrochloric acid, which comprises a tank body, the tank body is provided with a liquid inlet and a vapor phase outlet, and the bottom of the tank body is provided with a heating pipe; the partition plate is arranged at the position, located above the heating pipe, in the tank body, the partition plate is longitudinally provided with a plurality of filler storage grooves, movable plates moving up and down are arranged in the filler storage grooves, the movable plates are provided with a plurality of through holes allowing steam to pass through, and the filler storage grooves are filled with filler particles; the number of the filler particles is in positive correlation with the pressure generated by the filler particles to the bottom of the tank body; the cache box body comprises a fixed box body and a movable box body; the lifting driving part is arranged at the bottom of the tank body, the telescopic end of the lifting driving part is connected to the movable plate, the movable plate is provided with a connecting rod for driving the movable box body to move, and the lifting driving part drives the movable plate and the connecting rod to move upwards in the extending process so as to gradually push the filler particles into the movable box body.

Systems and methods for crude oil desalting technology are provided. More specifically, systems and methods for the usage of waste heat from compression to treat high salinity water are provided. The systems and methods generate recycled water streams for desalter treatment. The systems and methods can treat high salinity waters from desalters and dehydrators. The high salinity streams are introduced to the compressed gas streams, where the waste heat causes the water portion of the water streams to evaporate, resulting in a fully or near-saturated gas stream and a concentrated waste water stream. The saturated gas streams are cooled and condensed, and low TDS water is separated from the gas stream in knockout drums. The low TDS water can be reintroduced to the desalting system as wash water, generating a circular water reuse.

The invention provides a system and a method for producing high-purity electronic-grade carbonic ester, and the system comprises a heterogeneous reaction section, a separation section and a crystallization section along the material flow direction, the heterogeneous reaction section is used for carrying out heterogeneous reaction on ethylene oxide and carbon dioxide to prepare carbonic ester; the separation section is used for separating materials from the heterogeneous reaction section and comprises a flash evaporation unit and a rectification unit in the material flow direction, and the flash evaporation unit comprises at least one flash evaporation tank; the rectification unit comprises at least one rectification tower, and the side-draw of the rectification unit is communicated with the feed port of the crystallization section; and the crystallization section is used for crystallizing and purifying the material mainly containing carbonic ester from the separation section. According to the method, high-purity ethylene carbonate used as a power battery can be obtained from the crystallization section, and crystallization mother liquor can be selectively returned to the separation section to be concentrated. The method can effectively improve product purity, reduce product chromaticity and reduce energy consumption, and can be applied to industrial production of carbonic ester.

The invention relates to the technical field of turpentine processing, in particular to a turpentine continuous melting and clarifying processing device and method.The turpentine raw material is put into a feeding cylinder, piled in an inclined scattering cylinder, subjected to axial autorotation along with the feeding cylinder, discharged downwards and distributed in all areas in a dissolving tank, and after dissolving is completed, the turpentine raw material is poured into the feeding cylinder to be subjected to continuous melting and clarifying processing. When the telescopic part drives the sieve plate to move upwards until the bottom end of the movable cylinder abuts against the sieve plate, the sieve plate axially rotates along with the feeding cylinder and drives the movable cylinder to axially rotate, so that the material leakage port and the material scattering port are staggered, the movable cylinder rolls solid matters in the circumferential direction of the sieve plate, and the resin liquid is discharged into the clarifying tank along the liquid leakage pipe while slag is discharged from the slag outlet; after grease water in the clarification tank is layered, most of the water layer is discharged, the grease water is put into the feeding cylinder for circular treatment, and the steam injection system and the emptying pipe in the clarification tank are opened for distillation treatment, so that the continuous processing efficiency is further improved.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastics via the polymerization of dienes prior to further treatments.

The invention relates to the technical field of fatty acid zinc soap preparation, in particular to a method and equipment for preparing a fatty acid zinc soap mixture, the equipment comprises a shell and a heat conduction inner container, the heat conduction inner container is installed on the inner side wall of the shell, and a cavity is formed between the heat conduction inner container and the shell; the device further comprises a stirring device, a discharging device, a conveying device, a feeding pipe, a rotating shaft and a spiral blade, the feeding pipe is installed on the outer side wall of the shell, the output end of the feeding pipe communicates with the heat conduction inner container, the rotating shaft is rotationally installed on the stirring device, the spiral blade is installed on the outer side wall of the rotating shaft, and the stirring device is used for oppositely stirring a mixture in the heat conduction inner container. The stirring device is used for driving the rotating shaft to rotate, the discharging device is arranged at the bottom end of the shell in a communicating mode, and the discharging device is used for controlling discharging of materials in the shell; the mixing processing efficiency of raw materials is improved, the mixing uniformity of the fatty acid zinc soap is improved, the fatty acid zinc soap can be conveniently prepared and processed in the heat conduction inner container through different procedures, and the production efficiency is improved.

The utility model provides an energy-saving device for producing sodium methoxide, which comprises a reaction tower, a rectifying tower and a recovery tower which are connected in sequence, tower kettles of the rectifying tower and the recovery tower are respectively provided with a rectifying tower reboiler and a recovery tower reboiler, and a reaction tower reboiler is arranged in a tower kettle of the reaction tower. The tower top of the rectifying tower is connected with a tower kettle of the reaction tower through a rectifying tower gas phase pipeline I, a compressor I is arranged on the rectifying tower gas phase pipeline I, the rectifying tower gas phase pipeline I is connected with a rectifying tower gas phase pipeline II, the rectifying tower gas phase pipeline II is connected with the recovery tower reboiler, and a compressor II and a compressor III are arranged on the rectifying tower gas phase pipeline II; the rectifying tower gas phase pipeline II is connected with a rectifying tower gas phase pipeline III, the rectifying tower gas phase pipeline III is connected with a rectifying tower reboiler, and a rectifying tower reboiler discharge pipeline and a recovery tower reboiler discharge pipeline are respectively connected with the middle upper part of the rectifying tower; the energy utilization efficiency can be greatly improved, the energy consumption can be reduced, and the product purity can be improved.

The invention relates to a continuous production process and device of vinylene carbonate, chloroethylene carbonate, tertiary amine and a solvent are continuously fed in a reactor for dechlorination reaction, and temperature is controlled by a tubular heat exchanger; the reaction liquid continuously overflows from a side overflow port to enter a middle receiving tank, a vinylene carbonate crude product is obtained after desolvation, the vinylene carbonate crude product enters a melt crystallizer for melt crystallization after being purified by a low-component removal tower, a high-component removal tower and a rectifying tower, and a vinylene carbonate product with the purity of 99.99% or above is obtained; a reaction by-product tertiary amine hydrochloride settles to the lower part of the reactor, is discharged from the bottom of the reactor after being subjected to countercurrent washing by inputting a solvent through a salt leaching cavity, enters a neutralization kettle, is neutralized by liquid caustic soda and then is subjected to liquid separation, an organic phase enters a recovery system to be dehydrated, and then sequentially passes through a solvent recovery tower to recover the solvent and a tertiary amine recovery tower to recover tertiary amine; and the solvent and the tertiary amine can be recycled. The continuous production of the vinylene carbonate is realized, the consumption of raw materials is reduced, and the yield and the production efficiency are improved.

Systems and processes for cracking hydrocarbons to produce light olefins include an FCC reactor utilizing counter-current flow that includes a reaction zone comprising an elongated reaction tube that has a feed inlet, a product outlet, and a catalyst inlet. In embodiments, the FCC reactor further includes a freeboard zone. The freeboard zone is configured to reduce a superficial velocity of the cracked hydrocarbon fluids in the reaction zone, causing catalyst entrained in the cracked hydrocarbon fluids to at least partially separate from the cracked hydrocarbon fluids. In embodiments, the FCC reactor includes a dense fluidized bed unit. The dense fluidized bed unit is configured to inject a fluidizing gas such that bubbles are formed within the solid particles of the dense fluidized bed of solid particles, which causes the catalyst to overflow from the dense fluidized bed of solid particles into the reaction zone.

The invention provides a flexible switching production method and equipment for low cis-polybutadiene rubber (LCBR), solution polymerized styrene-butadiene rubber (SSBR) and hydroxyl-terminated liquid polybutadiene rubber (HTPB), the flexible switching production equipment comprises an initiator production device and a polymerization unit, and the flexible switching production method comprises the following steps: mixing cyclohexane and n-hexane according to a volume ratio of 6.5: 3.5-7: 3, adding an initiator, and stirring to obtain a mixture; forming a mixed solvent; the method comprises the following steps: adding a monomer, an active agent, an initiator and a mixed solvent into a polymerization kettle 31 of a polymerization unit, and carrying out polymerization reaction to obtain a low-cis-polybutadiene, solution polymerized styrene-butadiene or hydroxyl-terminated liquid polybutadiene rubber solution; a novel protection initiator tert-butyl dimethyl siloxy propyl sodium is designed, and hydroxyl-terminated liquid polybutadiene rubber with a controllable structure is prepared through anionic living polymerization. According to the process, shutdown for kettle cleaning is not needed, the low cis-polybutadiene, the solution polymerized styrene-butadiene and the hydroxyl-terminated liquid polybutadiene rubber can be produced on the same polymerization device in a flexible switching manner, and the overall production efficiency is improved.

The utility model relates to an energy-saving production device for preparing methyl tert-butyl ether by an isobutane dehydrogenation method. A raw material gasifier is arranged between the catalytic distillation tower feeding and discharging heat exchanger and the catalytic distillation tower, a temperature sensor is arranged on a feeding pipeline from the raw material gasifier to the catalytic distillation tower, a gas phase at the top of the catalytic distillation tower is divided into two pipelines, a compressor is additionally arranged on one pipeline, and an automatic flow regulating valve is additionally arranged on the other pipeline; a cold-side material outlet of the distillation tower feeding and discharging heat exchanger is connected with a cold-side material inlet of the raw material gasifier, a cold-side material outlet of the raw material gasifier is connected with a feeding hole in the middle lower part of the catalytic distillation tower, and a tower top discharging pipeline of the catalytic distillation tower is respectively connected with an inlet of the compressor and a hot-side material inlet of the condenser; an outlet pipeline of the compressor is connected with a hot measuring material inlet of the raw material gasifier, and a hot measuring material outlet of the raw material gasifier is connected with a liquid inlet of the return tank. According to the utility model, a heat pump technology is adopted, so that the heating power of the tower kettle reboiler is reduced, and the steam consumption is reduced; and the method is more economical.

This invention discloses a system and method for producing methanol by carbon dioxide hydrogenation. The system includes a feedstock turbine compressor, a first feedstock gas heat exchanger, a second feedstock gas heat exchanger, an adiabatic reactor, an isothermal reactor, a gas-liquid membrane separator, and a molecular sieve. By setting up an isothermal reactor and utilizing the heat from the product produced by the adiabatic reactor in separate streams, heat coupling between the two reactors is achieved. The unreacted feedstock gas remaining after the adiabatic first-stage reaction is circulated in the isothermal reactor, reducing the size requirements of the adiabatic reactor and improving the overall conversion rate of carbon dioxide. This application solves the problems of high energy consumption in the distillation of by-product water in the carbon dioxide hydrogenation to methanol process, large investment in traditional equipment, serious heat loss, and excessive circulating gas volume in existing technologies.

A process method for preparing acrylonitrile through propylene ammoxidation belongs to the field of chemical engineering, and is characterized in that in a corresponding device and a reaction system of the method, propylene, ammonia gas and air (in terms of O2) enter a fluidized bed reactor at 400-450 DEG C and 0.01-0.15 MPa for reaction according to a ratio of 1: (1-1.5): (2-10) at a weight hourly space velocity of 0.04-0.1 h <-1 >; the micro-sphere catalyst with the particle size of 40-60 microns in the dense-phase section and the dilute-phase section has alpha-phase bismuth molybdate, gamma-phase bismuth molybdate and lattice oxygen active centers and meets the chemical formula MoaBibNicWdTleVfPgSixOy, the atomic ratio a in the formula is 21-22, the atomic ratio b in the formula is 1.5-2, the atomic ratio c in the formula is 4-5, the atomic ratio d in the formula is 0.8-1, the atomic ratio e in the formula is 0.09-0.1, the atomic ratio f in the formula is 0.15-0.2, the atomic ratio g in the formula is 0.8-1, the atomic ratio x in the formula is 70-71, and y is the number of oxygen atoms needed by the atomic valence of all elements; a product enters a quench tower and a water absorption tower to be neutralized and cooled, and then passes through a recovery tower, an acetonitrile tower, a decyanation tower, a layering device and a finished product tower to realize separation of a water phase and an organic phase, so that crude acetonitrile, hydrocyanic acid and refined acrylonitrile are further obtained. The process is good in conversion degree and product selectivity, stable and reliable in operation, energy-saving and environment-friendly.

The present application belongs to the technical field of rare metal metallurgy, and particularly relates to a method and device for removing arsenic in germanium tetrachloride by hydrogen peroxide oxidation. The arsenic removal device comprises GeCl4, H2O2 and HCl storage containers, the storage containers are connected with a first reactor and a second reactor through pipelines, fourth, fifth, sixth, seventh and eighth valves are arranged on the pipelines, a first constant temperature heater is arranged at the lower part of the first reactor, a first mechanical stirrer is arranged at the top of the first reactor, a first residual liquid collector is connected with the bottom of the first reactor through a pipeline, and ninth and eleventh valves are arranged between the first reactor and the first residual liquid collector. Compared with the traditional chlorine arsenic removal method, the present application uses hydrogen peroxide to remove arsenic in germanium tetrachloride, is more environmentally friendly, safe, low-cost and does not bring new impurity elements, and the arsenic removal effect is very significant.

The invention discloses a hydrogen-coupled green methanol production system and method, and a green methanol product is obtained through the procedures of gasification, purification, methanol synthesis, methanol rectification and the like. The hydrogen-coupled green methanol production system comprises a gas making unit, a purification unit, a methanol synthesis unit and a methanol rectification unit, the gas making unit is a biomass gasification unit, the biomass gasification unit comprises a normal-pressure circulating fluidized bed, the normal-pressure circulating fluidized bed gasifies a biomass raw material to generate crude synthesis gas, the purification unit is used for purifying the crude synthesis gas, and the methanol rectification unit is used for rectifying the crude synthesis gas. The hydrogen compression unit is connected in front of the methanol synthesis unit, the hydrogen compression unit is used for providing hydrogen, the methanol synthesis unit is used for synthesizing synthesis gas and hydrogen into crude methanol, and the methanol rectification unit is used for rectifying the crude methanol into refined methanol. The method can promote the resource utilization of biomass materials, achieves the purposes of energy conservation, emission reduction and environmental protection, meets the current requirements of environmental protection, energy conservation and low-carbon economy, and is beneficial to green and sustainable development.

The invention belongs to the technical field of carbon dioxide trapping, and particularly relates to a carbon dioxide trapping system and a carbon dioxide trapping method. Compared with a traditional thermal desorption method, the carbon dioxide trapping system based on external microwave field assisted absorbent catalytic desorption has the advantage that the microwave desorption method has higher energy utilization efficiency. The random packing catalyst has an acid catalysis function, so that the desorption amount and the carbon removal rate of the absorbent can be further improved, and the random packing catalyst has a microwave absorption function, so that heat and mass transfer in the desorption process is enhanced in a hot spot form, and the utilization of microwaves is further improved. The desorption efficiency of 60-80% can be achieved below 102 DEG C, the CO2 desorption rate is far higher than that of a traditional thermal desorption method, and latent heat consumed by water evaporation in the desorption process is remarkably reduced. Meanwhile, the CO2 removal efficiency of the absorption tower is improved, and the cost of the whole carbon capture process can be remarkably reduced.

The utility model relates to the technical field of wet synthetic leather dimethyl formamide dilute liquid distillation, and discloses a wet synthetic leather dimethyl formamide dilute liquid distillation device which comprises a distillation cylinder, a connecting ring is fixedly mounted at the top of the distillation cylinder, a fixing bolt is in threaded connection with the top of the connecting ring, and a top cover is in threaded connection with the surface of the fixing bolt. A stirring assembly is arranged in the middle of the top surface of the top cover, an electric valve is fixedly mounted at the bottom of the distillation cylinder, and a retention cylinder is fixedly mounted on the surface of the electric valve. According to the wet synthetic leather dimethylformamide dilute liquid distillation device, through the arrangement of the distillation cylinder, the stirring assembly and the top cover, when a worker carries out distillation operation on dimethylformamide dilute liquid, the dimethylformamide dilute liquid can be placed in the distillation cylinder, and then the liquid in the distillation cylinder is heated by utilizing a temperature controller and a heating wire; and then a power supply of a servo motor is switched on, so that a stirring rod quickly mixes the liquid in the distillation cylinder, and the distillation effect of the liquid is accelerated.

The invention discloses a gasoline catalytic distillation desulfurization device and a gasoline catalytic distillation desulfurization method, relates to the technical field of hydrogenated gasoline processing, and aims to solve the problems that although various oil resources can be fractionated at different temperatures, the existing distillation desulfurization device is single in function and low in desulfurization efficiency due to limitation of gas retention time; the technical problem that the processing safety and quality are affected due to local hot spots and coking easily caused by distillation depending on the gas floating characteristic in the prior art is solved, and the device comprises a sealing assembly, a driving assembly connected with the sealing assembly and a collecting assembly located in the sealing assembly. By designing the collecting assembly and the isolating assembly, gasoline steam can be ensured to be in uniform contact with a solid catalyst, the desulfurization effect is guaranteed, on the other hand, gas can be in uniform contact with the isolating assembly and the collecting assembly in cooperation with operation of the motor, hot spot areas formed by overhigh local temperature in the initiation tower and the coking phenomenon are avoided, and the desulfurization efficiency is improved. And the use safety of the device and the quality of processed gasoline are ensured.

The invention provides a system and method for preparing carbonic ester, and the system comprises a pre-reactor which is used for the pre-reaction of carbonic ester and alcohol; the suspension type reaction rectifying tower comprises a rectifying section, a reaction section and a stripping section and is used for continuously reacting the pre-reacted material in the reaction section after rectifying the pre-reacted material through the rectifying section, and the heterogeneous solid catalyst reacts in the reaction section in a suspension manner; the suspended reactive distillation tower is provided with a gas ascending pipeline, and the gas ascending pipeline is communicated with a gas outlet in the top of the stripping section and a gas phase space in the top of the reaction section and is used for separating gas phase ascending of the stripping section. The system disclosed by the invention is simple in structure, effectively solves the problems of complex loading and unloading of a catalyst, damage of the catalyst and large discharge amount of three wastes in existing heterogeneous reactive distillation, and can be applied to industrial production; the method is especially suitable for production of chain carbonate or linear carbonate generated by esterification reaction of cyclic carbonate and alcohol.

The invention belongs to the technical field of scrubbing oil debenzolization regeneration in the coking industry, and particularly relates to a micro-positive pressure debenzolization device and method for an independent regenerator. Comprising a rich oil tank, the rich oil tank is sequentially connected with a lean and rich oil heat exchanger, a washing oil heater and a debenzolization tower through pipelines, and the reflux input end, the naphthalene oil output end, the gas phase output end and the steam input end of the debenzolization tower are respectively connected with a benzene-water separation tank, a tar asphalt tank, a condenser and a washing oil regenerator through pipelines. A steam input end and a slag discharge end of the wash oil regenerator are respectively provided with a jet ejector and a continuous jet negative pressure slag discharge device, a lean oil output end pipeline of the debenzolization tower is connected with a cold side input end of the lean and rich oil heat exchanger in parallel, and the jet ejector and the continuous jet negative pressure slag discharge device are connected with a tar asphalt tank through pipelines. According to the invention, the purpose of zero emission of VOCs is achieved by eliminating the generation of VOCs in the washing oil debenzolization process, so that the environmental pollution is reduced.

The invention discloses a polymer solution devolatilization device which comprises a first inlet assembly and a second inlet assembly, a first devolatilization internal part and a second devolatilization internal part are arranged at the outlet end of the first inlet assembly and the outlet end of the second inlet assembly respectively, and a plurality of Venturi type through holes are formed in the outlet faces of the two devolatilization internal parts. A low-viscosity polymer solution is fed from the first inlet assembly, is discharged after promoting removal of volatile components through the first devolatilization internal part, and falls on the outer surface of the second devolatilization internal part to form a film, so that the devolatilization time is prolonged, and the mass transfer area is increased; a high-viscosity polymer solution is fed from the second inlet assembly, and volatile component removal is promoted through the action of the second devolatilization internals. The device can selectively switch feeding according to the viscosity of the polymer solution, is suitable for devolatilization of the polymer solution with a wide viscosity range, can effectively solve the problem of frequent replacement of devolatilization internals during production switching of a plate number with large viscosity difference, ensures long-period stable operation of the device, and is high in devolatilization efficiency, and the obtained polymer is low in volatile component content.

The invention discloses a three-pool electrodialysis device and method for recovering a deep eutectic solvent. The method comprises the following steps: putting a deep eutectic extracting solution sample to be recovered into a sample pool; starting a direct-current power supply, electrifying the anode and the cathode, and performing electrodialysis on the eutectic extracting solution sample; detecting the concentration of a hydrogen bond acceptor in an anion receiving tank in real time, and detecting the concentration of a hydrogen bond donor in a cation receiving tank in real time until the concentration of the hydrogen bond acceptor and the concentration of the hydrogen bond donor are not changed any more, obtaining a hydrogen bond acceptor recovery solution in the anion receiving tank, hydrogen bond donor recovery liquid is obtained in the cation receiving pool; respectively distilling the hydrogen bond acceptor recovery liquid and the hydrogen bond donor recovery liquid, and removing moisture to obtain a recovered hydrogen bond acceptor and a recovered hydrogen bond acceptor; and mixing the recovered hydrogen bond acceptor and the recovered hydrogen bond acceptor according to the ratio of the initial eutectic solvent to obtain the recovered eutectic solvent.

The utility model discloses a device for continuously producing polyether. The device comprises a mixing kettle, a mixing kettle discharging pump, a receiving tank A, a receiving tank discharging pump A, a PO feeding pump, a static mixer, a pipeline reactor, a reactor discharging pump, an adsorption tower, an adsorption tower discharging pump, a receiving tank B, a receiving tank discharging pump B and a distillation tower, the method comprises the following steps: mixing an alcohol raw material and a catalyst in a mixing kettle, pumping into a receiving tank A for temporary storage, pumping the mixed material in the receiving tank A into a static mixer, mixing with epoxypropane, feeding into a pipeline reactor for reaction, pumping the reaction product in the pipeline reactor into an adsorption tower to remove metal elements introduced by the catalyst, a reaction product in the adsorption tower is pumped into a receiving tank B for temporary storage through an adsorption tower discharging pump, a reaction product in the receiving tank B is pumped into a distillation tower for distillation and purification, and purified polyether is obtained. By adopting the continuous production device, the energy consumption can be reduced, the generation of waste gas, waste residues and waste water is reduced, and the production cost is further reduced.

The invention discloses a method for improving molecular weight uniformity of polycarbosilane, and relates to the field of materials and chemical engineering. A packed distillation tower is additionally arranged in a polycarbosilane (PCS) reaction kettle, low-boiling-point small molecules in the reaction kettle in the synthesis process are distilled and separated out through the packed distillation tower, precise separation of the small molecules is achieved in combination with three-stage heating and a corresponding distillation mode, and the low-medium-boiling-point small molecules are removed in real time through rectification separation. The content of low-boiling-point components easily causing molecular weight fluctuation in the PCS is reduced, the randomness of the softening point of the PCS product is remarkably reduced, and the quality stability of the PCS is improved. And the temperature uniformity is improved, a reaction kettle with a larger volume is adapted, the problems of random molecular weight distribution, unstable softening point and the like of the existing PCS are effectively solved, and a reliable process is provided for preparing the high-quality PCS.

The invention discloses a green production process for synthesizing 1, 8-terpineol and preparing perfume-grade terpilenol by dehydrating the 1, 8-terpineol, which comprises the steps of hydration reaction, centrifugal separation, acid water recovery, by-product recovery, dehydration reaction and secondary distillation. Wherein the turpentine hydration reaction conditions are as follows: a catalyst is composed of alpha-hydroxy acid and phosphoric acid or boric acid, intermittent stirring is performed at room temperature, the reaction is performed for 2-15 days, an IBC ton barrel can be adopted as a reaction tank, and the mass yield of terpin hydrate is greater than 100%. Citric acid or tartaric acid is adopted to catalyze the dehydration reaction of terpineol hydrate, and the selectivity of terpineol can reach 91% or above. Compared with a traditional process, the method has the advantages that the catalyst is low in corrosivity and does not need an enamel reaction kettle; the reaction is carried out at room temperature, and no cooling equipment is needed; centrifuging to obtain terpin hydrate crystals without alkali neutralization; acid water is easy to recycle, and almost no wastewater is discharged; an IBC barrel is used as a reactor, so that the equipment investment is low.