146 results about "Simulated moving bed" patented technology

The invention discloses a method for continuously and efficiently adsorbing and separating hydrogen isotopes. The hydrogen isotopes are separated by adopting a multi-tower variable-temperature variable-pressure device operated in a simulated moving bed operation mode. When the device runs, each adsorption tower needs to sequentially execute the following steps: 1, adsorption; 2, replacement; 3, heating; 4, vacuumizing and desorbing; 5, carrying out vacuum purging; 6, pressurizing and cooling; the operation mode of the simulated moving bed is that an adsorption tower is frequently, sequentially and synchronously moved along the gas flowing direction in the tower through all gas input and output ports, so that an adsorbent phase and a gas flowing phase in the tower form countercurrent flow, and the hydrogen isotope adsorption separation efficiency is enhanced. The invention relates to a technological process of cyclic adsorption, replacement, heating, vacuum desorption, pressurization and cooling, continuous and efficient hydrogen and isotope adsorption separation is realized, multi-tower serial adsorption and replacement are adopted in the process, and separation of hydrogen isotopes (such as H2 / D2) is enhanced; and the desorption efficiency of heavy components is improved by adopting a heating and vacuumizing depressurization coupling mode.

The invention provides a method for separating and purifying galactose and glucose by using a simulated moving bed chromatography system, and relates to the technical field of saccharide separation and purification. According to the method, the simulated moving bed chromatography system is used for separating and purifying the galactose, operation can be carried out under the set temperature condition, the separation and purification efficiency of the galactose is remarkably improved, continuous large-scale efficient separation and purification of the galactose can be achieved, the separation and purification effect is good, the yield is high, and the product quality is good. According to the method, pure water is used as an eluent, and analyzed and purified compounds are free of damage, low in toxicity, rich in source and low in cost.

The invention provides a method for separating and purifying ergothioneine by simulated moving bed chromatography, which comprises the following steps: step 1, carrying out pretreatment, sterilization and ultrafiltration on fermentation liquor to obtain ultrafiltrate; 2, separating and purifying the ultrafiltrate by adopting a simulated moving bed chromatography system, and collecting a target component containing ergothioneine; and step 3, carrying out deep desalination, decoloration, concentration, cooling crystallization, centrifugation and drying on the target component to obtain a pure ergothioneine product. According to the method for separating and purifying the ergothioneine through the simulated moving bed chromatography, in the ergothioneine preparation process, the ergothioneine is purified from fermentation liquor through the simulated moving bed technology, and the method is high in efficiency and capable of achieving automatic and continuous large-scale production.

Systems and methods are provided for multiplexed extraction of target minerals from a variety of separate or combined desalination brines and / or wastewater sources. The use of multiple pretreatment, extraction, and posttreatment apparatuses with intelligent, directed flow control can allow for a single system to extract multiple target minerals. Improved extraction methods including zwitterionic simulated moving bed chromatography with target-specific zwitterions can allow for improved extraction efficiency and recovery rates with a dramatically reduced environmental footprint compared to existing methods.

Systems and methods are provided for multiplexed extraction of target minerals from a variety of separate or combined desalination brines and / or wastewater sources. The use of multiple pretreatment, extraction, and posttreatment apparatuses with intelligent, directed flow control can allow for a single system to extract multiple target minerals. Improved extraction methods including zwitterionic simulated moving bed chromatography with target-specific zwitterions can allow for improved extraction efficiency and recovery rates with a dramatically reduced environmental footprint compared to existing methods.

A method for separating and purifying 4MP1 from a mixture containing 4MTP2 and 1-Hexene comprises the following steps: continuously introducing a solution in which 4MTP2, 1-Hexene and 4MP1 with any concentration are dissolved into a simulated moving bed chromatography system as a raw material solution, collecting a high-purity 4MP1 solution from raffinate of the simulated moving bed chromatography system by adopting a metal organic framework material as a stationary phase, and separating the high-purity 4MP1 solution from the raffinate of the simulated moving bed chromatography system. The extraction liquid is a solution containing impurities 4MTP2 and 1-Hexene. The invention provides a brand new method for separating 4MP1 from 4MTP2 and 1-Hexene, and a complete separation scheme is provided for the prior art; in the separation of high-concentration 4MP1, the relative purity of the separated and purified 4MP1 can reach gt; the recovery rate is gt; and in the separation of low-concentration 4MP1, the rectification level is also exceeded, and the method is more suitable for 4MP1 thermosensitive substances.

The utility model relates to online elution equipment for a simulated moving bed. The online elution equipment comprises an adsorption system, a replacement system, a raw material feeding system, a mobile phase feeding system, a circulating system, a raffinate system and an extract system, the adsorption system comprises a plurality of adsorption columns, and each functional area is provided with at least one adsorption column; the replacement system comprises a replacement column and a replacement pipeline assembly, the structure of the replacement column is the same as that of the adsorption column, and the column top and the column bottom of the replacement column are connected with the column top and the column bottom of each adsorption column through the replacement pipeline assembly; the replacement column can replace the adsorption column in the isolation area so as to elute the adsorption column in the isolation area. Therefore, after the adsorption column in the isolation area is replaced by the replacement column, the replacement column can be connected into the circulation loop, so that the whole equipment can normally operate, the adsorption column in the isolation area does not need to be shut down during elution, and the stable and uninterrupted operation of the equipment is ensured.

The utility model relates to the technical field of simulated moving beds, and discloses a collection distributor for simulated moving bed purification and separation equipment, which comprises a distribution transverse pipe, the upper end of the distribution transverse pipe is fixedly connected with a main pipe, and the upper end of the main pipe is provided with an insertion pipe. The collection distributor for the purification and separation equipment of the simulated moving bed is provided with a first sliding rod, a first screw rod and a first adjusting seat, when a support and the simulated moving bed are fixedly installed and a main pipe needs to transversely align a pipeline of the simulated moving bed, two first motors are started to rotate forwards and backwards respectively, the two first screw rods are driven to rotate, and the first adjusting seat and the second adjusting seat are adjusted. The two first adjusting seats in threaded connection are driven to move along the first sliding rods, so that the main pipe is aligned with the pipeline of the simulated moving bed in the transverse direction, the collecting distributor can be fixedly installed with the simulated moving bed after roughly aligning, the multiple motors are started to finely adjust the main pipe, and the main pipe and the pipeline of the simulated moving bed are assisted to be fixedly installed. Manpower is saved, and the mounting efficiency is improved.

The present invention discloses a method for preparing fuel ethanol from straw biomass and the fuel ethanol, belonging to the technical field of fuel ethanol production. It includes: dissolving and hydrolyzing straw and concentrated sulfuric acid to obtain a saccharified solution, separating out a sugar-rich solution in a simulated moving bed chromatography system, and then mixing it with Saccharomyces cerevisiae SEB3 for fermentation, and generating fuel ethanol through distillation. The method for preparing fuel ethanol from straw biomass provided by the present invention can obtain fermentable sugars under normal pressure and low temperature conditions by using concentrated acid hydrolysis, and has the remarkable advantages of low energy consumption, low toxic by-products, and no need to input cellulase. And Saccharomyces cerevisiae SEB3 is used for fermentation. This strain has the ability of co-fermenting all sugars, can realize the fermentation of all sugars, synchronously convert all sugars into ethanol, the sugar consumption efficiency reaches more than 90%, and the ethanol recovery rate reaches more than 80%, and it is applicable to industrial production.

The invention discloses a method for preparing galacto-oligosaccharides, comprising the following steps: S1, using a lactose solution as a raw material, loading a barrier layer with beta-galactosidase immobilized by calcium pectin gel-chitosan, wherein the calcium pectin gel-chitosan as a carrier is composed as follows: chitosan is assembled on the surface of calcium pectin gel particles by electrostatic adsorption, and the beta-galactosidase is cross-linked to the chitosan; S2, circulating, wherein the lactose solution flows through the surface of the calcium pectin gel-chitosan and contacts with the beta-galactosidase for reaction; S3, pumping out the reaction solution, separating the galacto-oligosaccharides using a continuous simulated moving bed technology, and recovering the separated lactose to continue the reaction; the invention uses the calcium pectin gel particles as the core, gathers chitosan on the surface of the gel particles, further adsorbs and cross-links the beta-galactosidase, and cooperates with the liquid circulation during the reaction process to effectively improve the conversion rate of the galacto-oligosaccharides.

This invention relates to a method for the liquid-phase adsorption separation and purification of 2,3-dichloronitrobenzene and 3,4-dichloronitrobenzene, belonging to the field of chemical separation. This method for the simultaneous separation and purification of 2,3-dichloronitrobenzene and 3,4-dichloronitrobenzene involves preparing small spherical molecular sieve adsorbents from USY molecular sieves, silicon coupling agent-modified illite, and biomass polysaccharides, which are then loaded into a countercurrent simulated moving bed for separation and purification. This method can simultaneously obtain 2,3-dichloronitrobenzene and 3,4-dichloronitrobenzene with a purity ≥99%. The separation and purification method adopted in this invention is not only energy-efficient and highly effective, but also enables continuous production of two high-purity dichloronitrobenzenes, possessing significant industrial application value.

The present invention discloses a process for separating sugar and acid using an eight-zone simulated moving bed. The eight-zone simulated moving bed system is composed of 16 chromatographic columns filled with H-type cation exchange resins, and every two columns form a zone with a total of eight zones, specifically separation zones (Zones II, III, VI, and VII), stationary phase regeneration zones (Zones I and V), and eluent regeneration zones (Zones IV and VIII). The mobile phase direction of the entire system is opposite to the column switching direction, and the flow rate is controlled by three inlets and three outlets to achieve continuous separation of three components (sulfuric acid, monosaccharides, and organic acids). The technical solution of the present invention can achieve a recovery rate of sulfuric acid and xylose higher than 98%, a mass purity of xylose and sulfuric acid higher than 99%, and a solvent consumption of only 0.09 mL of deionized water per 1 g of xylose produced.

Systems and methods for recycling polymers. A method for recycling synthetic polymers by combining the polymers with a solid depolymerizing catalyst in a vessel, mechanically shearing the combined polymers and the solid depolymerizing catalyst against each other to produce monomers from the polymers; and collecting the monomers. The solid depolymerizing catalyst can be solid sodium hydroxide. Collecting the monomers can be achieved by contacting the sheared polymer and catalyst with a recyclable volatile solvent to dissolve the monomers. The method can include purifying the collected monomers for repolymerization. Purifying the monomers can be achieved using nanofiltration membrane technology, cyclic fixed bed adsorption, simulated moving-bed adsorption or a combination thereof.

The invention discloses equipment and a method for dry flue gas desulfurization based on a simulated moving bed, an adsorption tower and a regeneration double-tower process of traditional dry flue gas desulfurization are combined into a single module unit adsorption regeneration tower process, the tower is composed of a plurality of module units with the same function, and the module units are similar in structure, are arranged in parallel and are mutually independent. And a program control valve group is adopted for orderly switching the working process, so that efficient coupling among the multi-module units, the heating medium circulating system, the refrigerant circulating system and the carrier gas injection system in the tower is realized, and a continuously matched adsorption regeneration process among the multi-module units is realized. The process trend of a gas phase is periodically changed through a program control valve group, meanwhile, an adsorbent is kept still in situ, the effect of simulating a moving bed by a fixed bed is achieved, the solid adsorbent in the whole process is free of dynamic transfer and abrasion, the fixed bed can keep a good filling state, the gas phase is uniformly distributed in a bed layer, and the product quality is stable; and large handling capacity and automatic operation can be conveniently realized.

The utility model discloses a treatment device for scutellaria baicalensis acidification waste liquid. The treatment device comprises a pretreatment tank, a ceramic membrane filter, a first nanofiltration membrane filter, a first buffer tank and a simulated moving bed chromatographic separation system, an organic salt phase outlet of the simulated moving bed chromatographic separation system is communicated with a second buffer tank, a second nanofiltration membrane filter, a first heat concentration tank, a first spray dryer and a scutellaria baicalensis flavone storage tank; an organic phase outlet of the simulated moving bed chromatographic separation system is communicated with a first reverse osmosis membrane filter, a second heat concentration tank, a second spray dryer and a scutellaria baicalensis polysaccharide storage tank; permeate outlets of the first nanofiltration membrane filter and the second nanofiltration membrane filter are communicated with a second reverse osmosis membrane filter; the second reverse osmosis membrane filter is communicated with a third thermal concentration tank, a cooling tank, a plate and frame filter, a drying tank and a potassium chloride storage tank. According to the device, effective components in the scutellaria baicalensis acid precipitation waste liquid are effectively separated, the economic value of the scutellaria baicalensis acid precipitation waste liquid is improved, and environmental pollution caused by direct emission of the scutellaria baicalensis acid precipitation waste liquid is avoided.

Process and device for simulated moving bed extraction of lithium by adsorption, in which at least one column (Ci) is supplied with a feed (F) comprising lithium and a desorbent (D), and an extract (E) and a raffinate (R) are withdrawn from the column. The column comprises an adsorbent solid (Ai) and is configured to operate in a closed loop. The supply and withdrawal points of the column are shifted over time by a value corresponding to a predetermined quantity of adsorbent solid with a permutation period and determine a plurality of operating zones of the column, in particular the following main zones: a lithium desorption zone I; a desorption zone II of compounds other than lithium; and a lithium adsorption zone III. According to the invention, a portion of the extract is recycled to the feed.

Provided is an assembly comprising: at least one valve box block (20) comprising a plurality of valves (25) controllable via a control surface (24) of the valve box block (20); a valve control block (10) having an operating surface (11), the valve control block (10) being configured to control each of the plurality of valves (25) when the operating surface (11) contacts the control surface (24) of the at least one valve box block (20), the valve control block (10) comprising at least one sliding groove (14) formed in the operating surface (11); and at least one sliding member (30) configured to contact the at least one sliding groove (14). 4) slidably interlocked so that at least one sliding component (30) is movable relative to the valve control block (10) in a sliding direction parallel to the operating surface (11); at least one traction bracket (40, 50) is configured to surround at least one valve box block (20) and interact with at least one sliding component (30) so that sliding movement of at least one sliding component (30) in at least one sliding groove (14) causes the traction bracket (40, 50) to traction the at least one valve box block (20), wherein its control surface (24) abuts against the operating surface (11) of the valve control block (10).

The invention relates to a process for the preparation of an allulose product comprising enzymatic conversion of fructose into allulose; chromatographically separating the thus obtained crude product into (i) one or more allulose enriched fractions, (ii) a fructose enriched fraction, and optionally (iii) a purge fraction, preferably by simulated moving bed chromatography; and recirculating the fructose enriched fraction to the enzymatic conversion.

The invention relates to a method for purifying a plastic feedstock to obtain a purified polymer stream, comprising: a) a dissolution step in which the plastic feedstock is brought into contact with a dissolution solvent; followed by b) an extraction step by means of size exclusion, in which beds of size exclusion solids are used in series, the polymer solution from a) is fed at an injection point (F) and an eluent is fed at an injection point (S), and the extract is removed at a removal point (E) and a raffinate comprising the purified polymer solution is removed at a removal point (R), the injection point and the extraction point are separated and are moved by one bed along with time according to a given frequency; followed by c) a polymer-solvent separation step to obtain a stream of purified polymer. The invention also relates to a device for carrying out step b) and to a device for carrying out said purification method.

The application discloses a method for separating spirodiphenol by using an analog moving bed chromatography. The method for separating spirodiphenol specifically disclosed comprises the following steps: separating left-handed spirodiphenol and right-handed spirodiphenol from a spirodiphenol racemate by using an analog moving bed chromatography system; and the analog moving bed chromatography system has the following conditions: a stationary phase: silica gel coated with chiral polymer; and a mobile phase: a mixed solution of n-hexane and ethanol. The application can realize complete separation of two single enantiomers, obtain high purity and high recovery rate, and is more suitable for industrial production while being continuously operated. The process has strong stability, constant product quality, high automation degree, higher yield and lower cost than batch chromatography. The method also has the advantages of high yield, low cost, recyclable elution phase, green environmental protection, automatic and continuous production, stable product quality and the like.

The utility model provides a nitrile compound refining system and an amine compound preparation system, and relates to the technical field of nitrile compound separation and refining. The system comprises a separation tower which is provided with a first feeding hole, a tower top outlet and a tower kettle outlet; the simulated moving bed is provided with a second feeding hole, a first outlet, a second outlet and a solvent inlet, the second feeding hole is communicated with the tower top outlet, and the second outlet is communicated with the separation tower; the recovery tower is provided with a third feeding hole, a third outlet and a fourth outlet, the third feeding hole is communicated with the first outlet of the simulated moving bed, and the third outlet is communicated with the solvent inlet of the simulated moving bed; the rectifying tower is provided with a fourth feeding hole and a fifth outlet, and the fourth feeding hole is communicated with the tower kettle outlet of the separating tower. Through cooperation of the separating tower, the simulated moving bed and the rectifying tower, and through material circulation and solvent recovery, efficient separation of isomer impurities with approximate boiling points is realized, and energy consumption is reduced.

The invention relates to the field of petrochemical industry adsorption separation, and discloses fluid collection-mixing-uniform distribution equipment, application thereof and a simulated moving bed device. The fluid collection-mixing-uniform distribution equipment comprises a fluid injection and extraction pipeline, a fluid collection chamber, a fluid collection plate and a fluid uniform distribution plate which are sequentially arranged along the flowing trend of fluid; the fluid collection chamber is used for changing the flowing direction of fluid injected through the fluid injection and extraction pipeline; a fluid flowing channel is formed in the fluid collecting plate and is used for distributing fluid from the fluid collecting chamber for the first time; the fluid uniform distribution plate is used for carrying out secondary distribution on the fluid from the fluid collection plate and comprises a first area located under the fluid circulation channel and a second area outside the first area, and the circulation capacity of the second area is larger than that of the first area. The fluid collected by the equipment disclosed by the invention can obtain uniform speed distribution and component distribution.

The invention provides a method for separating lactulose and lactose by using a sequential simulated moving bed chromatography system, and relates to the technical field of saccharide separation and purification. According to the invention, the sequential simulated moving bed chromatography system is used for separating and purifying lactulose, and the analysis area, the refining area, the adsorption area and the isolation area can be operated at the same time under the set temperature condition, so that the separation and purification efficiency of lactulose is remarkably improved, continuous large-scale separation and purification of lactulose can be realized, the separation and purification effect is good, the yield is high, and the product quality is good. According to the method, pure water is used as an eluent, so that analyzed and purified compounds are free of damage and toxicity, rich in source and low in cost.

The application discloses a modeling method and device for a diesel aromatic hydrocarbon simulated moving bed adsorption separation device, and the method comprises the following steps: based on material balance principle and mass transfer mechanism, a bed layer flowing phase dynamic mechanism model and a bed layer fixed phase dynamic mechanism model of different components are respectively constructed; based on finite element method and orthogonal configuration method, discretization processing is performed to obtain a bed layer flowing phase dynamic mechanism discrete model and a bed layer fixed phase dynamic mechanism discrete model; based on material balance principle, a node model of different components is respectively constructed; and then, a bed layer dynamic mechanism discrete model of different components and a full-component bed layer dynamic mechanism discrete model are constructed, so that model parameters are optimized based on the full-component bed layer dynamic mechanism discrete model. The method can comprehensively, systematically and accurately reveal the quantitative relationship between a large number of parameters of the diesel aromatic hydrocarbon simulated moving bed adsorption separation device and device performance indexes, thereby realizing optimized design and optimized operation of the device, and having important industrial application value.

The present invention relates to a method for recovering a stream of purified PVC polymer, comprising: a) a dissolution step in which a plastic feedstock is contacted with a dissolution solvent; b) an extraction step by size exclusion in which fixed beds of size-exclusion solids are arranged in series, the crude polymer solution obtained in step a) is fed at injection point F, the eluate is fed at injection point S, the extract is withdrawn at withdrawal point E, and a raffinate comprising the purified polymer solution is withdrawn at withdrawal point R, the injection and withdrawal points shifting by one bed over time with a frequency determined by a predetermined changeover period; and c) a step in which the solvent and the polymer are separated to obtain a stream of purified PVC polymer. The present invention also relates to a device for the treatment of step b) and to a device for treating the recovery method.

The utility model discloses a reutilization device of stevia mother liquor sugar. The reutilization device comprises a mother liquor sugar solution storage tank, a simulated moving bed chromatographic separation system, a reverse osmosis system, an acidification tank, a plate and frame filter, a first drying tank and a rebaudioside B storage tank which are communicated with one another, an organic phase outlet of the simulated moving bed chromatographic separation system is sequentially communicated with a concentration tank, a second drying tank and a stevioside storage tank; and a permeate outlet of the reverse osmosis system is communicated with a moving phase inlet of the simulated moving bed chromatographic separation system. According to the device, the stevia mother liquor sugar solution is sequentially subjected to simulated moving bed chromatographic separation, reverse osmosis treatment and acidification treatment to obtain a high-content first product rebaudioside B, other stevioside in the process is also recycled, waste liquid is also effectively utilized, the economic value of the stevia mother liquor sugar is improved, and the energy consumption is reduced.

This invention relates to the field of corn soaking water treatment technology, and particularly to a process for producing expanded compound fertilizer using corn soaking water, comprising the following steps: (1) passing the supernatant of corn soaking water after static sedimentation through an anion exchange resin column; (2) replacing the residual corn soaking water in the anion exchange resin column with compressed air, eluting with potassium sulfate solution, and collecting the first and second eluents respectively; (3) taking the first eluent, adjusting the pH, and then concentrating and hydrolyzing it, the resulting hydrolysate is flash-cooled and filtered, and the collected filtrate is used for later use; (4) taking the filtrate and processing it using a simulated moving bed chromatography separation system to obtain inositol product and phosphate phase; (5) taking the phosphate phase, concentrating and filtering it, adding a decolorizing agent to the collected filtrate, and after decolorization treatment, granulating and drying the decolorized liquid to obtain expanded compound fertilizer. The above process can produce expanded compound fertilizer.

The invention relates to the technical field of microbial fermentation production, in particular to a method for increasing the yield of erythritol by adding erythritol chromatographic raffinate, which comprises the following steps of: adding the erythritol chromatographic raffinate into a fermentation culture medium, fermenting by using an erythritol fermentation strain to obtain erythritol fermentation liquor, filtering, concentrating, crystallizing and centrifuging to obtain the erythritol fermentation liquor. The crystallization mother liquor is separated through simulated moving bed chromatography to obtain an erythritol chromatography extracting solution and an erythritol chromatography raffinate, the erythritol chromatography extracting solution and a new erythritol fermentation liquor which is subjected to filtration and concentration are mixed and then crystallized together, and the erythritol fermentation liquor is obtained. And adding the erythritol chromatographic raffinate into the fermentation culture medium for cyclic utilization. According to the method, the problem of utilization of the erythritol chromatographic separation raffinate is solved, the erythritol fermentation yield is increased, the erythritol fermentation raw material cost is reduced, and the sewage treatment pressure is relieved.

This invention belongs to the technical field of L-histidine production and discloses a method for extracting L-histidine using simulated moving bed chromatography, which includes a fermentation step and an extraction step. This method can achieve continuous production of L-histidine and has the advantages of high fermentation efficiency, short production cycle, low production cost, low pollution, and high extraction yield.

A simulated moving-bed lithium adsorption process and apparatus in which a column (Ci) comprising a solid adsorbent is fed with a feed (F) comprising lithium and a desorbent (D) and is withdrawn of a raffinate (R) and an extract (E2), the column being divided into several predetermined quantities of solid adsorbent according to a permutation period defining the following zones: a zone I between the injection of the desorbent and the withdrawal of an eluate (E1) and the extract, a zone II between the withdrawal of the raffinate and the injection of the desorbent, and a zone III between the injection of the feed and the withdrawal of the raffinate, in which each permutation period comprises two steps: a step A of eluate withdrawal from zone I and a step B of extract withdrawal from zone I. Figure 3 to be published