598results about "Vacuum distillation separation" patented technology

The utility model relates to a negative-pressure crude benzene distillation system adopting a tubular furnace for heating. The negative-pressure crude benzene distillation system comprises a debenzolization tower, the tubular furnace and a crude benzene condensing, cooling and separating integrated device, the debenzolization tower is sequentially provided with a rectifying section, a stripping section, a storage tank section and a regeneration section from top to bottom; the crude benzene condensing, cooling and separating integrated device comprises a heat exchange tower and a separating tank; a low-temperature water heat exchanger is arranged at the lower part of the heat exchange tower; a crude benzene collecting section, an oil-gas-water separating section and a water collecting section are arranged in the separating tank; a first heating section and a second heating section are arranged in the tubular furnace. Compared with an existing negative-pressure crude benzene distillation process system, the negative-pressure crude benzene distillation process system has the remarkable advantages that the tail gas output is low, the tail gas is not discharged, the tube furnace operation temperature is low, the washing oil consumption is small, no additional separated water is generated, the one-time investment is low, and the like.

The invention relates to a method for extracting and separating polyether polyol in waste salt slag by a water-based method, and belongs to the technical field of separation and purification. The method comprises the following steps: (1) slurrying extraction: mixing polyether polyol salt slag with water according to a certain mass ratio, and carrying out slurrying extraction under a stirring condition to obtain oil-water-salt mixed slurry; (2) performing centrifugal separation to obtain an oil-water mixture rich in polyether polyol; (3) demulsifying and layering to obtain a polyether polyol phase; and (4) refining and purifying: dehydrating the polyether polyol phase to obtain a recycled polyether polyol product. According to the method, water is used as an extraction solvent, so that the use of toxic and flammable organic solvents is completely avoided, the safety and health hidden dangers are fundamentally eliminated, and secondary organic pollution is avoided. By optimizing parameters such as the temperature and the liquid-solid ratio of extraction water and combining centrifugal separation, the polyether polyol can be efficiently extracted and separated from the thick salt slag, and the recovery rate can reach 95% or above.

The invention relates to the technical field of honey processing, in particular to a vacuum concentrator for honey processing, which comprises a concentration tank, a cover, an inner wall scraping mechanism, a stirring mechanism, a collecting plate and a bottom scraping mechanism, the cover is arranged at the top of the concentration tank; the inner wall scraping mechanism is arranged on the inner wall of the concentration tank and is used for scraping honey on the inner wall of the concentration tank; the stirring mechanism is arranged in the concentration tank and is used for stirring honey in the concentration tank; the inner wall of the concentration tank can be scraped, honey is prevented from being attached to the inner wall of the concentration tank, cleaning is not affected, meanwhile, a scraping sleeve connected with a second connecting rod is used for scraping a rotating shaft and stirring blades, the purpose of further scraping is achieved, attached honey is cleaned away, and the concentration tank is convenient to use. Therefore, the use space of the inner wall is increased.

The application discloses a double-hearth two-stage heating vacuum distillation furnace, which comprises an evaporation furnace and a condensation furnace which are communicated through a gas passage, wherein the evaporation furnace comprises an evaporation furnace body and at least one top heating mechanism which is detachably arranged on the top of the evaporation furnace body; and the condensation furnace comprises a condensation furnace body, a side heating structure and a furnace cover, wherein the condensation furnace body is divided into a temperature control condensation chamber and a plurality of layers of multistage condensation chambers, and the gas passage can be combined or replaced according to the required reaction conditions of different materials. The vacuum distillation furnace can collect different metals through the gradient change of the temperature of the two hearths, reduces the process of secondary distillation of volatile matters after the furnace is stopped, can complete the processing of diversified raw materials, improves the work efficiency and reduces the processing cost; the modular top heating mode directly radiates heat to the materials, improves the heat utilization rate, can realize the working mode of stopping the furnace without stopping the work, helps to improve the work efficiency, and is convenient for completing the furnace cleaning, maintenance and solid material taking and placing.

The invention relates to the technical field of deodorants, and discloses a preparation method and application of an onion extract high-efficiency low-temperature concentrated deodorant, and the preparation method comprises the following steps: S1, dicing onions, soaking in a color protection solution, and draining for later use; s2, putting the diced onions into a supercritical extraction kettle, and extracting by taking ethanol as an entrainer; s3, a mixed system in the extraction kettle is sequentially guided into a first-stage separation kettle and a second-stage separation kettle through a throttling valve; s4, filtering the onion extract crude product through a bifunctional biomimetic membrane, and performing nanofiltration through a nanofiltration system; s5, concentrating the nanofiltration membrane trapped fluid in vacuum low-temperature concentration equipment to obtain an onion extract concentrated solution; s6, preparing microcapsule powder from the onion extract concentrated solution, a solvent, an emulsifier, deionized water and modified beta-cyclodextrin; mixing the microcapsule powder with menthol to prepare a solid deodorant; or compounding with ethanol to prepare liquid spray.

The invention discloses a low-temperature cold-extraction slow-distillation extraction system and method for honeysuckle juice, and relates to the technical field of honeysuckle juice extraction. A vacuum slow distillation stage; a low-temperature purification stage; a fermentation stage and a blending stage; according to the method, low-temperature cold extraction is combined with vacuum gradient slow distillation, degradation of heat-sensitive components such as chlorogenic acid and galuteolin is effectively reduced, and the retention rate of the heat-sensitive components is greatly increased; components with different boiling points are collected by stages through gradient distillation, the extraction rate of functional components such as polysaccharide and flavone is increased, and the problem of component loss caused by a traditional high-temperature process is solved. Low-temperature treatment retains more natural aroma substances, gradient distillation makes the aroma level of the product richer, and the flavor is better than that of the original process; the filtration and alcohol precipitation treatment in the low-temperature purification stage significantly improves the clarity qualification rate of the finished product, and ensures the appearance quality of the product. Distillation residues and mother liquor filter residues are fermented by bacillus subtilis to produce enzyme primary pulp, the comprehensive utilization rate of raw materials is greatly increased, and resource circulation is achieved.

The invention provides a coarse methanol five-tower thermal coupling refining process and a refining device.The device comprises a pre-rectifying tower, a normal-pressure rectifying tower, a medium-pressure rectifying tower, a first pressurized rectifying tower and a second pressurized rectifying tower which are sequentially connected, the top of the pre-rectifying tower is connected with a first normal-pressure tower reboiler, and the top of the medium-pressure rectifying tower is connected with a pre-tower reboiler; the top of the pressurized rectifying tower I is connected with a medium-pressure tower reboiler and a pressurized tower II reboiler; the top of the pressurized rectifying tower II is connected with an atmospheric tower reboiler II through a top extraction pipeline of the pressurized tower II; tower top steam of the first pressurized rectifying tower provides heat for the medium-pressure rectifying tower and the second pressurized rectifying tower, tower top steam of the medium-pressure rectifying tower provides heat for the pre-rectifying tower, tower top steam of the pre-rectifying tower and the second pressurized rectifying tower provides heat for the normal-pressure rectifying tower, and heat of the tower tops of all the rectifying towers is fully utilized; through the application, the unit consumption of the methanol rectification process can be reduced from 1.2 t steam / t refined alcohol to 0.50-0.60 t steam / t refined alcohol, so that the energy consumption is greatly reduced.

The invention discloses a device and method for preparing special isocyanate, the device comprises a synthesis device and a separation device, the synthesis device comprises a batching tank, a synthesis reaction kettle, a discharge filter, a discharge circulating pump, a sampler, a flash tank and a crude product conveying pump which are communicated in sequence, and an axial-flow stirrer and a parabolic stirrer are arranged in the synthesis reaction kettle; a catalyst basket is detachably and vertically fixed on the inner side wall of the synthesis reaction kettle; the separation device comprises a negative pressure separation tower, a tower top cooler, a gas-liquid bag, a condensate collecting tank and a tower top reflux pump which are sequentially communicated, and is also provided with a vacuum pump, a tower kettle circulating pump and a product conveying pipeline. The device and the preparation method have the beneficial effects of high synthesis reaction speed, simple and controllable production process, good crude product separation effect and low equipment energy consumption.

The utility model relates to distillation condensing device technical field discloses a kind of novel high-efficiency crude distillation condensing device, including distillation kettle, the distillation kettle is hollow cavity, bottom is provided with heating mechanism, top is communicated steam outlet, spiral condenser tube, the spiral condenser tube is connected with steam outlet, collector, the collector is communicated with spiral condenser tube outlet, for receiving condensate, temperature sensor, the temperature sensor is installed at steam outlet, vacuum pump, the vacuum pump is communicated with the top of distillation kettle by connecting pipe, cooling water circulation system, the cooling water circulation system includes cooling water tank and circulating pump. In the utility model, through the heat exchange structure of spiral condenser tube and double-layer spiral cooling jacket, cooperate the negative pressure distillation design of vacuum pump, effectively reduce liquid boiling point and increase condensing area, significantly improve distillation efficiency and energy utilization rate, while distillation kettle inner wall hydrophobic coating reduces liquid adhesion, further optimizes distillation process.

An integrated oil filtering and oil storage device and a fully automatic control method. The integrated oil filtering and oil storage device comprises a waste oil tank (400), a first clean oil tank (200), a second clean oil tank (300) and a vacuum oil filter (100), wherein the waste oil tank (400) is provided with a fourth liquid level switch (401) and a fifth liquid level switch (402), which are used for determining the liquid level in the waste oil tank (400) and controlling the start or stop of an oil replenishment process; the first clean oil tank (200) is provided with a first liquid level switch (201) and a second liquid level switch (202), which are used for determining the liquid level in the first clean oil tank (200) and controlling the start or stop of first oil filtering and oil injection processes; the second clean oil tank (300) is provided with an eighth liquid level switch (302) and a ninth liquid level switch (303), which are used for determining the liquid level of clean oil in the second clean oil tank (300) and controlling the start or stop of second oil filtering and oil injection processes. The device has the functions of oil filtering, waste oil storage and clean oil storage; and by means of the liquid level switches, a fully automatic control process is achieved without requiring manual operation, and the functions of automatic oil filtering, automatic clean oil storage and automatic waste oil storage can be achieved, thereby avoiding the risks of device malfunction and misoperation.

The utility model discloses a device for extracting iris root oil by vacuum distillation, which belongs to the technical field of vacuum distillation extraction and comprises a distillation kettle, a top cover is arranged at the upper end of the distillation kettle, and a support frame is arranged on the top cover. Through the oil-water separation device, oil-water separation can be carried out at the first time by utilizing the oil-water separation device after condensation and liquefaction of an extracted substance, the process can be realized without an additional device, the whole extraction process is simplified, a lifting structure is arranged on an end cover, and when the amount of essential oil and water is changed, the lifting structure is arranged on the end cover; the lifting structure can rapidly adjust the height of the oil suction pipe, it is guaranteed that the tail end of the oil suction pipe is located in essential oil all the time, normal operation of oil-water separation work is guaranteed, the servo motor, the lead screw, the movable sleeve and other structures are adopted, adjustment is flexible and convenient, adjustment at any position can be achieved in the stroke, and the oil-water separation efficiency is improved. And the screw rod and the movable sleeve have a self-locking effect, so that the stability of the adjusted oil suction pipe can be guaranteed.

The invention discloses a low-oxygen-content barium fluoride continuous vacuum distillation purification device and method, and relates to the technical field of barium fluoride purification, the device comprises a vacuum tower, the top surface of the vacuum tower is hermetically connected with a sealing cover, the center position of the top surface of the sealing cover is provided with a vacuumizing mechanism, and the inner side of the sealing cover is provided with a continuous feeding mechanism; a heating mechanism is arranged in the middle of the inner cavity of the vacuum tower; the vacuum pumping mechanism is arranged and used for controlling the continuous feeding mechanism and the heating mechanism while keeping the vacuum degree of the vacuum tower, so that the continuous feeding mechanism controls the continuous feeding speed of barium fluoride based on the barium fluoride distillation and purification speed of the heating mechanism, and the feeding accuracy of barium fluoride is guaranteed.

The utility model discloses a reduced pressure distillation device for brain extract brain oil, which belongs to the technical field of extraction equipment and comprises an equipment main body, and the equipment main body comprises a distillation container, a receiving container, a connecting pipe, a condensing pipe and a vacuum connecting pipe; the heating assembly comprises a heating container, a heating resistance wire, a compression cylinder and a placement panel, and the compression cylinder is provided with a water hole; the stirring assembly comprises a stirring piece; after the distillation container is placed on the placing panel, the compression cylinder is compressed under the action of gravity, and the water level in the heating container is higher than or equal to the liquid level of supernate in the distillation container; the liquid level of the supernatant drops, the compression cylinder rises, and the water level in the heating container also drops; according to the utility model, by arranging the heating component, the water level in the heating container is always changed along with the liquid level of the supernatant in the distillation container, so that the supernatant in the distillation container is uniformly heated, and the local temperature of the distillation container is prevented from being too high.

The utility model discloses a coking anti-blocking mechanism for a second-line distillation outlet of reduced pressure distillation, and particularly relates to the technical field of distillation kettles, the coking anti-blocking mechanism comprises a distillation kettle, a first distillation port and a second distillation port are respectively arranged on the distillation kettle, and a mounting groove is arranged in the second distillation port. A plurality of heating pieces which are arranged in a linear array are arranged in the mounting groove, an outlet pipe is arranged on the second distillation opening, and a plurality of guide grooves which are arranged in a linear array are formed in the outlet pipe. According to the distillation kettle provided by the utility model, exhaust and liquid discharge are realized through the first distillation port and the second distillation port on the distillation kettle, installation of a plurality of heating elements is realized through the installation groove of the second distillation port, liquid discharge is realized through the outlet pipe on the second distillation port, and liquid is guided through a plurality of guide grooves on the outlet pipe; the liquid flow rate is increased.

The invention relates to the technical field of benzyl bromide preparation and discloses a benzyl bromide preparation device and method.The benzyl bromide preparation device comprises a stirring kettle, a heating box is fixedly connected to the outer wall of the stirring kettle, an isolation sleeve is fixedly connected to the inner wall of the stirring kettle, a water inlet pipe is fixedly connected to the upper surface of the heating box, and a water outlet pipe is fixedly connected to the lower surface of the heating box; one end of the water inlet pipe penetrates through the surface of the heating box and is fixedly connected with a water pump, a supporting plate is fixedly connected into the heating box, the water pump is installed on the surface of the supporting plate, and the middle of the heating box is connected with a heating assembly. The bottom of the isolation sleeve is connected with a temperature measuring assembly, and the inner wall of the isolation sleeve is connected with a scraping assembly. According to the preparation device and the preparation method of the benzyl bromide, reaction materials in the stirring kettle can be uniformly heated, so that the reaction uniformity is improved, and an overheating or supercooling phenomenon of a local area is avoided.

The invention provides a production system for preparing two-dimensional aromatic polyamide based on a liquid-phase loop tube, and relates to the technical field of two-dimensional aromatic polyamide production, and the production system comprises a loop tube core reaction module used for carrying out a two-dimensional aromatic polyamide polycondensation reaction through a loop tube reactor; the intelligent regulation and control module is used for monitoring operation parameters of the ring pipe core reaction module in real time and generating a reaction parameter regulation and control instruction and a heat dissipation optimization strategy. Strong turbulent flow is generated in the loop reactor through high-speed circulating flow of the axial flow pump, continuous and uniform shearing and mixing are provided for reaction materials, a retention area possibly formed by high-viscosity fluid can be effectively broken, full contact of monomers, oligomers and growing two-dimensional lamellas is ensured, the mass transfer efficiency is improved, and the mass transfer efficiency is improved. Non-uniform local concentration and a reaction dead zone are avoided; dynamic optimization and safety interlocking protection of reaction parameters are realized by combining a kinetic model, so that the reaction controllability is improved, the production risk is reduced, and the product conversion rate and the molecular weight stability are guaranteed.

A waste triethylene glycol purification and recycling device relates to the technical field of triethylene glycol purification devices and comprises a triethylene glycol vacuum evaporation tank, a primary condenser, a secondary condenser, a condensation storage tank, a gas-liquid separation tank and a vacuum pump, a steam outlet pipeline A is arranged at the upper end of the triethylene glycol vacuum evaporation tank and communicated with an inlet of the primary condenser, and a steam outlet pipeline B is arranged at the lower end of the steam outlet pipeline A; triethylene glycol steam is condensed into liquid through the first-stage condenser, an outlet of the first-stage condenser is communicated with the condensation storage tank, a steam outlet pipeline B is arranged on the upper portion of the condensation storage tank and communicated with an inlet of the second-stage condenser, and gaseous triethylene glycol steam is condensed into liquid through the second-stage condenser. An outlet of the secondary condenser is communicated with a gas-liquid separation tank; the upper part of the gas-liquid separation tank is communicated with a vacuum pump; the vacuum degree of the triethylene glycol vacuum evaporation tank is 4KPa, and under the vacuum degree, the boiling point of triethylene glycol is lower than 200 DEG C and lower than the theoretical decomposition temperature of 208 DEG C, so that purer triethylene glycol can be obtained and reaches the recycling standard.

The embodiment of the invention relates to the field of material separation by utilizing a distillation technology, in particular to a distillation separation device suitable for a hot chamber, and the distillation separation device is used for separating a target component from a to-be-separated material. The distillation furnace comprises a furnace body assembly and a distillation collection piece. The furnace body assembly comprises a furnace body used for conducting heating and heat preservation on the shell; the shell extends downwards in the furnace body to the position below the furnace body, and an opening is formed in the bottom of the shell. The distillation collection part is detachably connected with the shell so as to seal the opening of the shell, and the target component is separated from the to-be-separated material after being evaporated in the distillation collection part and is condensed into a solid state. The furnace body assembly further comprises a vacuumizing pipeline, the shell is provided with a vacuumizing connector, the vacuumizing connector is located in the furnace body, and the vacuumizing pipeline penetrates through the furnace body to be connected with the vacuumizing connector so as to vacuumize the interior of the shell. According to the distillation separation device provided by the embodiment of the invention, the furnace body can be hung on the supporting platform in the hot chamber and can be hung away from the supporting platform.

The invention relates to a negative pressure type distillation system capable of quickly transferring condensate. The negative pressure type distillation system comprises a distillation kettle, a condenser, a buffer tank, a receiving kettle and a vacuum pump, wherein a gas outlet of the distillation kettle is communicated with a condensation inlet of the condenser; a condensation outlet of the condenser is communicated with a liquid inlet of the buffer tank; the gas outlet of the buffer tank is communicated with the input end of the vacuum pump; the liquid outlet of the buffer tank is selectively communicated with the liquid inlet of the receiving kettle; and the gas outlet of the receiving kettle is selectively communicated with the input end of the vacuum pump. By shortening the exposure time of the organic solvent in the vacuum pumping environment of the vacuum pump, the problem that the solvent is pumped away is remarkably reduced, so that the concentration efficiency is improved, and the material loss is reduced.

The utility model provides a system for improving the vacuum degree of a single acid distillation tower. Comprising a first single acid distillation tower, a second single acid distillation tower, a first acid condenser, a second acid condenser, a third acid condenser, a first acid jet vacuum pump, a second acid jet vacuum pump, a third acid jet vacuum pump, a fourth acid jet vacuum pump, a first acid cold trap, a second acid cold trap, an acid hot well, a glycerin distillation tower, a glycerin condenser, a first oil jet vacuum pump, a second oil jet vacuum pump and a third oil jet vacuum pump. 4, an oil injection vacuum pump and an oil hot well; when vacuum is started, the first single-acid distillation tower and the second single-acid distillation tower are gathered to one pipeline and connected to the glycerin distillation vacuum system, and the vacuum degree of the single-acid distillation system is improved through the glycerin distillation vacuum system; the vacuum degree of the single-acid tower is improved, the purpose of distilling and separating high-boiling-point materials is achieved, the utilization rate of the single-acid tower is improved, the tower kettle temperature of the single-acid tower is reduced after vacuum is improved, damage of high temperature to the single-acid tower is reduced, and the natural gas usage amount of the single-acid tower is reduced.

The invention relates to a method for continuously producing poly (p-dioxanone), which comprises the following steps: premixing glycollic acid or a glycollic acid derivative with a ring formation catalyst, and introducing the obtained mixed material and ethylene oxide into a synthesis reaction kettle for reaction; separating and purifying the obtained reaction product, introducing the obtained purified monomer into a polymerization reaction kettle, and adding a polymerization catalyst for polymerization; after polymerization is finished, discharging is conducted, residual materials in the polymerization reaction kettle are subjected to depolymerization treatment to clean the kettle body, after depolymerization is finished, depolymerization products generated in the depolymerization treatment process are discharged, the kettle does not need to be opened for cleaning, and the next round of polymerization production is directly conducted. According to the method disclosed by the invention, the steps of synthesizing the p-dioxanone monomer, separating and purifying the monomer, catalyzing and polymerizing, depolymerizing and cleaning the kettle body and the like are continuously carried out, so that the continuous production of the poly (p-dioxanone) is realized, the side reaction of oligomerization and degradation of the p-dioxanone in storage and transportation can be avoided, and the production cost of the poly (p-dioxanone) is obviously reduced.

The invention discloses a steel rolling oil sludge deoiling method based on vacuum treatment, and belongs to the technical field of metallurgical industry solid waste treatment. The deoiling method comprises the steps that dried cold-rolled oil sludge and sintered return mine particles are stirred and mixed, pretreated oil sludge is obtained, and the component of sintered return mine comprises Fe3O4; mixing the pretreated oil sludge with an extraction agent, and then carrying out solid-liquid separation to obtain an oil-containing solvent on the upper layer and a deoiling solid-phase product on the lower layer; and carrying out vacuum distillation on a deoiled solid-phase product obtained by extraction to obtain finally treated oil sludge. According to the scheme, the cold-rolled oil sludge and the sintered return mine particles are stirred and mixed, and the separated grease can be recycled through a synergistic process of breaking agglomeration through impact and magnetic attraction, permeating a solvent and performing vacuum separation; meanwhile, the residual oil rate of the oil sludge and sintered return mine mixed solid phase obtained after vacuum distillation treatment is smaller than 1 wt.%, and deep deoiling is achieved.

The invention discloses a waste offset printing ink recovery treatment method and application, and belongs to the technical field of printing ink, the recovery treatment method comprises the following steps: mixing and stirring waste offset printing ink and n-hexane through pretreatment, and removing solid-phase slag through centrifugal separation to obtain a liquid phase; concentrating the liquid phase, recovering the solvent and reserving concentrated slurry; secondly, directionally dissolving the low-molecular resin and the high-molecular resin by butyl acetate and ethylene glycol diacetate respectively through two-stage counter-current extraction and centrifugal separation to obtain a low-molecular resin solution, a high-molecular resin solution and pure pigment slurry; mixing the two resin solutions, recovering the solvent through multi-tower rectification, and refining through short-path molecular distillation to obtain regenerated resin; and finally, performing ultrasonic purification, modification and spray drying on the pigment slurry to obtain the regenerated pigment. According to the waste offset printing ink recycling treatment method and application, an efficient and reliable solution is provided for recycling of waste offset printing ink.

The spice distillation still comprises a distillation still body, a sealing cover and a plurality of vibrating bars, a fixing ring is fixedly connected to the outer end of the distillation still body, a plurality of supporting columns are fixedly connected to the lower end of the fixing ring, a condensation jacket is fixedly connected to the upper ends of the supporting columns and located at the outer end of the distillation still body, and a feeding port is formed in the upper end of the distillation still body; according to the invention, the heating rod and the magnetic suction rod are used for stirring to drive the vibrating rod to vibrate, so that the aim of reducing the adhesion of spices to the wall and shortening the distillation period is fulfilled, and the vibrating rod is influenced by magnetic force and stirring, so that the vibrating rod swings on the inner wall of the distillation kettle body and impacts the inner wall; according to the perfume distilling device, perfume adhering to the inner wall can be reduced, the perfume distilling speed can be increased, the distilling period is shortened, meanwhile, the sealing cover is used for sealing the feeding port, air pressure leakage can be effectively prevented, air can be prevented from entering, and the purity and quality of final essence are greatly improved.

The invention discloses an emulsion preparation device and an emulsion preparation method using the same, the device comprises a mixer main body, a liquid inlet conduit, a liquid outlet conduit and a feeding assembly, the mixer main body has a three-way flow channel structure, an optional flow channel is a liquid outlet flow channel, the other two flow channels are liquid inlet flow channels, the liquid outlet conduit is communicated with the liquid outlet flow channel, and the feeding assembly is communicated with the liquid inlet flow channel. The liquid inlet guide pipe is communicated with the liquid inlet flow channel, and the feeding assembly is communicated with the liquid inlet guide pipe. The method for preparing the emulsion comprises the steps that the dispersed phase and the mobile phase are obtained, the continuous phase and the dispersed phase are put into the two liquid inlet flow channels of the mixer body through the liquid inlet guide pipes by means of the feeding assembly, the emulsion formed after mixing flows out of the liquid outlet flow channels and is collected, the flow speed ratio of the continuous phase to the dispersed phase is 2: 1-4: 1, and the total flow speed is 60-750 mL / min. According to the scheme, the emulsion with the appropriate particle size is prepared at the low flow speed, the feeding temperature range is wide, the device is simple, the channel dead volume is small, and the device is suitable for both laboratories and industrial production.

Methods and systems for separating a first metal and an impurity from a metal-containing feed stream are provided. The method can include applying solar energy, for example, by focusing one or more mirrors in one or more heliostats, to heat a metal-containing feed stream in a heating zone to a first temperature to produce a first vapor including the first metal. The first vapor can be condensed in a condensation zone to produce a first liquid including the first metal, and the first liquid can be collected. The system can include a separation unit include a heating zone in fluid communication with a condensation zone and a means for applying solar energy to heat a metal-containing feed stream disposed in the heating zone.

The invention belongs to the technical field of petrochemical engineering and fine chemical engineering separation, and discloses a method and device for separating alpha-olefin and isomers thereof by using metal-based ionic liquid and application, and the method comprises the following steps: mixing a raw material solution containing target alpha-olefin with an extraction agent; performing liquid-liquid extraction; after standing and layering, respectively collecting an extraction phase and a raffinate phase; components in the extraction phase and the raffinate phase are qualitatively and quantitatively analyzed, and the partition coefficient, the separation selectivity and the purity are evaluated; and analyzing the target alpha-olefin in the extraction phase, and recovering through a reduced pressure rotary evaporation process. According to the method, the metal-based ionic liquid with dual effects of pi-complexation and spatial recognition is introduced as the extraction agent, so that high-selectivity recognition and enrichment of the target normal alpha-olefin are realized, interference of internal olefin, branched olefin and saturated isoparaffin is effectively inhibited, and the purity and selectivity of the target component are remarkably improved.

The invention discloses a method for recycling and reusing a light byproduct of biphenyl alcohol monochloride, and relates to the technical field of organic matter recycling, and the method comprises the following steps: firstly, adsorbing and purifying a fraction generated by rectifying 3-chloro-2-methyl biphenyl in a biphenyl alcohol synthesis process by using specifically prepared modified activated carbon; the modified activated carbon is prepared through deep activation, silicon dioxide network construction and stearoyl chloride hydrophobization treatment, impurities can be efficiently removed, and self hydrophobicity is stable. And carrying out catalytic hydrogenation on the purified material in a hydrogenation reactor under the action of the modified activated carbon supported ruthenium-palladium bimetallic catalyst. The reaction product is subjected to post-treatment and distillation, fractions are collected, and the high-value hydrogenated terphenyl heat-conducting oil can be recovered.

The invention relates to the technical field of chemical engineering, and discloses a rectification optimization process for improving the quality of acetic anhydride, the process realizes efficient pre-removal of high boiling impurities and colored substances in crude acetic anhydride by optimizing the structure of an evaporation tower, adopting combination of falling film evaporation and filler reinforcement, and accurately controlling the operation parameters of vacuum degree, temperature and feeding amount, so that the quality of the acetic anhydride is improved, and the quality of the acetic anhydride is improved. A traditional tower plate of the acetic acid rectifying tower is replaced with the efficient float valve tower plate, the internal part structure of the efficient float valve tower plate is optimized, the gas-liquid mass transfer efficiency in the rectifying tower is improved, and efficient and stable separation of acetic acid and acetic anhydride is achieved through precise linkage control over temperature and reflux ratio rectifying parameters. The main content of the product is improved; the impurity content is reduced; through whole-process online monitoring and regular optimization iteration in combination with a process parameter-product quality database, dynamic regulation and control and continuous improvement of the production process are realized, and finally the beneficial effects that the main content of acetic anhydride in the product is greater than or equal to 99.65% and the chromaticity is less than or equal to 6 are achieved.

The invention relates to a process for obtaining free fatty acid and / or free fatty acid ester, in which a liquid mixture containing the free fatty acid and / or the fatty acid ester is separated by contacting a vapour of the liquid mixture in a column of a distillation apparatus with condensate formed from the vapour running downward, wherein heat and mass transfer takes place between the vapour and the condensate on column internals. According to the invention, the column has at least 10 theoretical plates and the separation is conducted with a pressure drop between the top and bottom of the column Δp of ≥ 3.3 mbar. Appropriately, the liquid mixture, preferably produced from vegetable oil or from fish oil, contains polyunsaturated fatty acid, preferably omega-6 or omega-3 fatty acid and / or alkyl monoesters and / or glycerol monoesters. In one configuration of the invention, the column has at least 30, preferably at least 40, theoretical plates and the separation is conducted with a pressure drop Δp between 3.5 mbar and 6 mbar.