397results about "Extraction purification/separation" patented technology

The invention belongs to the technical field of bioengineering, and particularly relates to a preparation process of nanoscale water-soluble squalene. Comprising the following steps: S1, treating corn flour, adding pure water, and performing enzymolysis by adopting compound enzyme to obtain corn saccharified liquid for later use; s2, inoculating saccharomyces cerevisiae GS-A3 into a culture medium containing the corn saccharification liquid, and fermenting; s3, centrifuging the fermentation liquor, and extracting by adopting supercritical CO2 to obtain a squalene crude product; and S4, carrying out nanocrystallization treatment after molecular distillation treatment. According to the method, corn is taken as a raw material, rich starch resources are utilized, the corn is converted into glucose through enzymolysis, squalene is generated in saccharomyces cerevisiae through an MVA way, high-yield and high-purity squalene is prepared, the stability of squalene is improved through a special nanocrystallization treatment mode, the storage life of squalene in the application process is prolonged, and the method is suitable for industrial production. And the bioavailability can be obviously improved. In addition, the technology used in the invention meets the requirements of green and environmental protection.

The present disclosure relates to a process for removal of carbonyl impurities from a mixed hydrocarbon stream obtained from naphtha and gas stream cracking processes. The process of the present disclosure is simple, economical and environment friendly. The process of the present disclosure is efficient in removing higher amounts of carbonyl impurities. The process of the present disclosure can be easily scaled up for commercial purposes.

[Problem] To provide a method capable of producing a monocyclic aromatic hydrocarbon such as benzene or xylene effective as a base raw material, with a naphtha raw material containing renewable naphtha. [Solution] A method for producing at least one monocyclic aromatic hydrocarbon of benzene or xylene with a naphtha raw material containing renewable naphtha, the method including step (A-1) of pyrolyzing the naphtha raw material in the presence of water vapor, to produce and separate toluene, and step (A-2) of subjecting toluene to disproportionation reaction or transalkylation reaction, to produce and separate at least one monocyclic aromatic hydrocarbon of benzene or xylene.

The invention relates to a method for ultrasonic-enhanced extraction of a multicoloured leaf extract by using an ethanol and ethyl acetate cosolvent, and belongs to the technical field of chemical engineering and plant extraction. (2) synergistically degrading cellulose by using multi-component glycosidase; (3) cosolvent extraction; 4, chloroplast pigment is efficiently separated and purified, chlorophyll and other impurities in an extracting solution are effectively separated and removed through silica gel column chromatography, and therefore the high purity of the multicoloured leaf extract is achieved; according to the invention, ethanol and ethyl acetate are used as cosolvents to extract the multicoloured leaf extract, so that the extraction efficiency and the purity of the extract can be improved.

The invention belongs to the technical field of dielectric material monomer synthesis, and discloses a preparation method of 1-methylbenzocyclobutene, which comprises the following steps: reacting 1-hydroxybenzocyclobutene serving as a raw material with paratoluensulfonyl chloride (TsCl) to generate 1-paratoluensulfonyloxy benzocyclobutene, then reacting with methylmagnesium chloride under the action of a catalyst to obtain 1-paratoluensulfonyloxy benzocyclobutene; the target product 1-methylbenzocyclobutene is synthesized mainly by controlling the reaction temperature, the feeding sequence and the feeding proportion under the relatively mild condition, and the method is simple in technological operation, mild in experimental condition, high in product yield and suitable for industrial production.

The invention discloses a method for separating and purifying squalene from squalene fermentation liquor, and belongs to the technical field of squalene extraction. The method comprises the following steps: 1) pretreatment: adding a wall breaking reagent into squalene fermentation liquor for wall breaking, or concentrating the squalene fermentation liquor and then adding the wall breaking reagent for wall breaking; 2) extraction: adding an organic solvent and a demulsifier, layering to obtain a water phase and an organic phase, and collecting the organic phase; 3) impurity removal: adding an aqueous solution, layering to obtain an aqueous phase and an organic phase, and collecting the organic phase; and 4) distilling: distilling to obtain purified squalene. The method is simple to operate, low in equipment investment, simple in post-treatment and low in extraction cost, and the obtained squalene refined product is high in yield, high in purity and suitable for industrialization.

The invention relates to the technical field of chemical separation and purification, and discloses a method for separation and purification of taxadiene from tobacco and GC-MSMS quantitative detection.The method for separation and purification of taxadiene from tobacco comprises the following steps that S1, tobacco leaves are made into powder, an extracting agent is added, ultrasonic extraction is conducted for multiple times, and extract liquor is obtained; s2, evaporating the extract to dryness, adding an organic solvent, and dissolving to form a concentrated solution; s3, the concentrated solution is added into a silica gel column for gradient elution, and an extraction sample is obtained; and S4, evaporating the extracted sample to dryness, adding acetonitrile for dissolving, and carrying out secondary recrystallization to obtain purified taxadiene. According to the method, the efficiency and purity of separating the taxadiene from the tobacco are improved, and the taxadiene is accurately quantified.

Producing a heavy aromatic fraction from fast pyrolysis oil includes combining fast pyrolysis oil and a first solvent to yield an emulsion; heating the emulsion to yield an organic phase and an aqueous phase; vapor stripping the organic phase with a second solvent to yield the heavy aromatic fraction and a condensate comprising the first solvent, the second solvent, and water; concentrating the aqueous phase to yield a water-soluble organic fraction, water, and light ends comprising organic compounds having 1-6 carbon atoms; combining the condensate with the light ends to yield a mixture; distilling the mixture to yield a first stream comprising the first solvent and water and a second stream comprising the second solvent; combining the first stream with the fast pyrolysis oil to yield the emulsion; and combining the second stream with the organic phase to yield the heavy aromatic fraction and the condensate.

The invention relates to the technical field of separation and purification, in particular to a method and a device for separating and purifying aromatic hydrocarbon, alkane and olefin, and the method combines liquid-liquid extraction and extractive distillation (namely, first extractive distillation and second extractive distillation), so that the liquid-liquid extraction and the extractive distillation are operated in respective dominant zones. In liquid-liquid extraction, heavy alkanes with small solubility are separated, light alkanes with high relative volatility are separated in first extractive distillation, olefins with high relative volatility are separated in second extractive distillation, aromatic hydrocarbons and solvents are separated in solvent recovery, and finally, the same solvent is used to realize efficient separation of aromatic hydrocarbons, alkanes and olefins.

The invention relates to a device and a method for preparing isobutene and methanol by cracking methyl tert-butyl ether. The device comprises a methyl tert-butyl ether vaporization refining tower, a reactor, a cooling tower, an absorption tower, a methanol extraction tower, an isobutene light component removal tower and an isobutene heavy component removal tower which are sequentially connected along a material conveying direction, a top discharge hole of the cooling tower is connected with a lower gas-phase material inlet of the absorption tower; an absorbent outlet at the bottom of the absorption tower is circularly connected with a cooling absorption liquid inlet at the top of the cooling tower; the bottom extract liquor outlet of the methanol extraction tower is circularly connected with the top absorbent inlet of the absorption tower; an isobutylene discharge hole is formed in the top of the isobutylene heavy component removal tower; the device further comprises a methanol recovery tower and a methanol refining tower which are connected in sequence along the material conveying direction; a bottom cooling absorption liquid outlet of the cooling tower is connected with the methanol recovery tower; a methanol discharge hole is formed in the bottom of the methanol refining tower. The device provided by the invention not only can relax the limitation of the purity of methyl tert-butyl ether in raw materials, but also can prepare high-purity isobutene and high-purity methanol at the same time.

The present invention relates to a column for the liquid-liquid extraction of a feedstock by an extraction solvent, comprising perforated trays (Pi) for the passage of a dispersed phase (B), the perforated trays being spaced apart by an inter-tray space (8), and comprising spillways (6), a spillway being a hole allowing the passage of a continuous phase (A) through a perforated tray, the extraction column (1) alternately comprising perforated trays of type I having two peripheral spillways, and perforated trays of type II having a single central spillway, wherein: the height H1 of the inter-tray spaces located directly downstream of the trays of type I, in the direction of flow of the continuous phase, is greater than the height H2 of the inter-tray spaces located directly downstream of the trays of type II. The present invention also relates to a liquid-liquid extraction method using said liquid-liquid extraction column.

Disclosed is a process for producing a jet fuel, comprising a step of converting an alcohol stream in a fluidized bed, a jet fuel and a plant associated with said process. The process involves the following steps:(a) converting a C1 to C6 alcohol stream to produce a mixture containing paraffins, olefins, aromatics, and water;(b) separating water from the mixture;(c) oligomerizing olefins; and(d) alkylating aromatics from the mixture;(e) forming a stream of hydrocarbons to be hydrogenated;(f) hydrogenating the stream of hydrocarbons to be hydrogenated;(g) recovering at least one jet fuel fraction from the hydrogenated hydrocarbon stream.Conversion step (a) is carried out in a reaction zone comprising at least one fluidized catalytic bed.In the mixture of paraffins, olefins, aromatics and water produced in conversion step (a), the ratio of the mass of C3+ olefins to the total mass of olefins is greater than or equal to 0.8.

The present invention relates to a method for producing farnesene oil, the method comprising the use of a raw material fermentation yeast in a fermentation vessel to produce a whole cell culture fluid (WCB); and adding a surfactant to the fermentation vessel to reduce emulsification within the fermentation tank.

The invention discloses a method for separating squalene from vegetable oil deodorized distillate, which comprises the following steps: mixing the vegetable oil deodorized distillate containing squalene with a first solvent to obtain a raw material solution, and carrying out fractional extraction on the raw material solution by using a second solvent as an extraction agent and a third solvent as a washing agent, the first solvent is selected from one or more of non-polar solvents and weak polar solvents, the second solvent is selected from one or more of polar solvents, and the third solvent is selected from one or more of non-polar solvents and weak polar solvents. The fractional extraction method adopted by the invention has the advantages of high treatment capacity, high product purity and recovery rate, low energy consumption and cost, easiness in amplification and the like, and is suitable for industrial production.

A process for preparing a purified benzene composition from a crude hydrocarbon stream containing at least 10% by volume of benzene is provided. The process comprises subjecting the crude hydrocarbon stream and a further recycled benzene containing stream to a solvent-based extraction so as to produce a benzene enriched aromatic stream and a benzene depleted non-aromatic stream, subjecting the benzene enriched aromatic stream to a hydrodesulfurization so as to obtain a desulfurized aromatic stream, subjecting the desulfurized aromatic stream to a distillation producing a purified benzene stream and a further benzene containing stream having a benzene concentration of between less than 100% by weight and the azeotropic benzene concentration, and at least partially recycling the further benzene containing stream.

Processes and apparatuses for separating carbon monoxide from ethylene. The ethylene may be produced from biobased alcohol. The separation utilizes a fractionation column which produces a carbon monoxide depleted ethylene steam and an overhead steam comprising carbon monoxide and ethylene. The ethylene from the overhead steam may be recovered in an absorption zone with an absorbing liquid. A oxygenate fractionation zone may be utilized to remove oxygenates from the carbon monoxide depleted ethylene stream.

The present invention provides systems and methods for preventing the accumulation of light fractions such as methane, ethylene, and ethane in an olefin / paraffin separation system that uses a combination of a membrane and a distillation column for the separation. In one embodiment, a small stripper column is provided downstream of a selective hydrogenation reactor. In another embodiment, a pressure regulating vessel with a receiver is added to the retentate stream of the membrane unit.

The present invention relates to the technical field of polycyclic aromatic hydrocarbon separation, and provides a polycyclic aromatic hydrocarbon separation method. In the present invention, firstly, a mixed solvent and a mixture to be separated are mixed and then filtered to obtain a filter cake and a filtrate, then a back-extractant and the filtrate are mixed and then separated, wherein the mixed solvent is a naphthyl mixed solvent or an imidazole mixed solvent, and the mixture to be separated is a mixture containing a bicyclic aromatic hydrocarbon and a tricyclic aromatic hydrocarbon or a mixture containing a tricyclic aromatic hydrocarbon and a tetracyclic aromatic hydrocarbon. According to the present invention, the mixture containing the bicyclic aromatic hydrocarbon and the tricyclic aromatic hydrocarbon is separated by using the naphthyl mixed solvent, the mixture containing the tricyclic aromatic hydrocarbon and the tetracyclic aromatic hydrocarbon is separated by using the imidazole mixed solvent, and the naphthyl mixed solvent or the imidazole mixed solvent can be recycled. Additionally, the separation method provided by the present invention has simple steps, low energy consumption and a simple technological process.

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 relates to the field of fermentation product extraction methods, in particular to a method for efficiently extracting intracellular products. According to the method, staged extraction and ultrasound are combined to be applied to intracellular product extraction, and the extraction rate can be obviously increased. After thalli in fermentation liquor are crushed, a non-polar solvent is adopted for first extraction, and ultrasonic short-time low-temperature treatment is adopted in the extraction process, so that the extraction efficiency of a target product can be obviously improved, a polar solvent is added into an extraction phase of the first extraction in second extraction, and ultrasonic short-time low-temperature treatment is performed again, so that the extraction amount of intracellular products is increased; the process does not need complex equipment, is short in operation time consumption and high in extraction efficiency, and is suitable for large-scale industrial production.

A column for the liquid-liquid extraction of a feedstock by an extraction solvent, containing sieve trays (Pi) for a dispersed phase (B) to pass through, the sieve trays being spaced apart by an inter-tray space (8), and riser / downcomer conduits (6), a riser / downcomer conduit being an opening that allows a continuous phase (A) to pass through a sieve tray, the extraction column (1) containing, in alternation, type-I sieve trays containing two peripheral riser / downcomer conduits, and type-II sieve trays containing a single central riser / downcomer conduit, wherein: the height H1 of the inter-tray spaces situated directly downstream of the type-I trays, in the direction of flow of the continuous phase, is greater than the height H2 of the inter-tray spaces positioned directly downstream of the type-II trays. Also, a liquid-liquid extraction method that makes use of the liquid-liquid extraction column.

The present invention relates to a method and device for separating aromatic compounds from a feed (1) comprising a mixture of aromatic and non-aromatic compounds, wherein aromatics are extracted from the feed (1) in a liquid-liquid extractor (T1) fed with a solvent (2) to produce at least one extract (4) concentrated in aromatic compounds relative to the feed (1), and one raffinate (3) concentrated in non-aromatic compounds relative to the composition of the feed (1); and wherein the liquid-liquid extractor (T1) is fed with all of a recycle of the extract (5) at one or more positions of the liquid-liquid extractor (T1) disposed between a feed point (1) and a solvent feed point (2). Figure 3 to be published

The invention discloses a double-solvent extraction method in an organic solution, and belongs to the technical field of solvent extraction methods in organic solutions. The method comprises the following steps: mixing an original solution with a solvent S1 serving as an organic extraction agent and a solvent S2 serving as an inorganic extraction agent to obtain a solution 1; after the solution 1 is subjected to multiple times of step-by-step extraction, an extraction phase E1, an extraction phase E2 and a raffinate phase R are generated respectively; and separating the extract liquor to respectively obtain extract liquor E01, extract liquor E02 and raffinate R0. The method disclosed by the invention is simple and rapid to operate, good in selectivity, good in separation effect, relatively high in extraction rate, capable of obtaining a relatively pure solvent, wide in application range and capable of effectively separating organic matters and inorganic matters in an organic solution at the same time.

The utility model discloses equipment for recovering caprolactam in benzene residual liquid. The equipment comprises a crude benzene feeding assembly, the feeding end of the benzene distillation assembly is connected with the discharging end of the crude benzene feeding assembly, the benzene distillation assembly is used for distilling crude benzene, and the benzene distillation assembly comprises a first benzene distillation tower and a second benzene distillation tower; the benzene raffinate extraction assembly comprises a benzene raffinate extraction tower feeding cooler, the feeding end of the benzene raffinate extraction tower feeding cooler is connected with the discharging end of the benzene distillation tower II, and the benzene raffinate extraction tower feeding cooler is used for cooling benzene raffinate generated by the benzene distillation assembly; the feeding end of the benzene raffinate extraction tower is connected with the discharging end of the benzene raffinate extraction tower feeding cooler, and the benzene raffinate extraction tower is used for extracting the cooled benzene raffinate. The device is reasonable in design, the recovery rate of caprolactam in the benzene raffinate can reach 90% or above by additionally arranging the benzene raffinate extraction assembly, energy expenses such as steam and electricity are not generated, material consumption is reduced, and sewage treatment pressure can be reduced.

The invention relates to the technical field of hydrocarbon synthesis, and discloses a solvent-free synthesis process of a high-purity alpha-methylstyrene linear dimer, which comprises the following steps: mixing a monomer and a catalyst for reaction, cooling the reaction system to a preset dynamic viscosity interval, introducing micron-sized deionized water as a polar induction core by using an atomization device, and carrying out reaction to obtain the high-purity alpha-methylstyrene linear dimer. According to the method, the micro-emulsification steady state of a solvent-free system is broken by utilizing an interface directional capture mechanism, residual catalytic centers in the organic phase are physically removed, and the catalytic activity of the solvent-free system is improved, so that the catalytic activity of the solvent-free system is improved, and the catalytic activity of the solvent-free system is improved. The mechanism eliminates the technical risk that the catalyst is decomposed to generate hydrogen fluoride in the rectification process, prevents the pyrolysis rearrangement of linear products to cyclic isomers, and ensures the purity of medical intermediates.

The invention provides a preparation method and device of a polycyclic aromatic hydrocarbon oligomer, and the preparation method comprises the following steps: 1) carrying out polymerization reaction on raw materials comprising a polycyclic aromatic hydrocarbon compound, an acidic ionic liquid catalyst and a solvent to obtain a reaction system; 2) carrying out extraction treatment on the reaction system by adopting an extraction agent to obtain an extraction phase containing a polymer and a raffinate phase containing an acidic ionic liquid catalyst; the solvent and the extracting agent respectively and independently comprise at least one of benzene and benzene homologues. The preparation method can significantly reduce the usage amount of acid liquor or alkali liquor, and is beneficial to environmental protection; according to the preparation method, the catalyst cannot be inactivated, the catalyst can be repeatedly used, and the industrial cost is effectively reduced.

The invention relates to the technical field of preparation of functional active substances as by-products of aquatic products, in particular to a method for preparing squalene from livers of cultured takifugu obscurus, which comprises the following steps: preparing liver oil: taking out the livers from the cultured takifugu obscurus, adding n-hexane, n-heptane, petroleum ether or diethyl ether-water mixed liquor, homogenizing, ultrasonically extracting, centrifuging, and filtering to obtain the liver oil; filtering to prepare the liver oil for breeding the Takifugu obscurus; saponification: adding sodium hydroxide-ethanol into the liver oil of the cultured Takifugu obscurus, and refluxing in a water bath; extraction: transferring the saponified liquid into a separating funnel, and adding normal hexane, normal heptane or cyclohexane for extraction; and purification: dissolving the collected sample in dichloromethane, passing through a silica gel column for chromatographic purification, and collecting a fraction containing the squalene component. The method disclosed by the invention has the advantages of simple process, convenience in operation, high extraction efficiency and high product purity, and is a method for obtaining high-purity squalene by fully utilizing the processing value of the by-product liver of the cultured Takifugu obscurus.

The present invention relates to a process (OTO) and a plant for producing olefins from oxygenates, wherein it is also intended to optimize the yields of BTX aromatic benzene, toluene and isoxylenes at the same time. According to the invention, for this purpose a gasoline fraction obtained in an OTO process according to the prior art is added to the aromatization reactor. Multi-stage separation of the product stream from the aromatization reactor provides a product stream containing BTX aromatics and a gasoline fraction from which olefins, naphthenes, and cycloalkenes have been removed.

The invention discloses a method for preparing pyridine hydrobromide using pyridine hydrochloride mother liquor, belongs to the technical field of pyridine hydrochloride, and is characterized in that it comprises the following steps: adding purified water to pyridine hydrochloride mother liquor, stirring and standing the mixed solution to be layered, and obtaining a lower layer solution; adding calcium hydroxide solution to the lower layer solution, adjusting the pH to neutral, and adding a phase transfer aid to saturation, stirring and standing the mixed solution to be layered, and obtaining an upper layer of recovered pyridine solution; passing hydrogen bromide gas into the recovered pyridine solution, and collecting the reaction solution; the reaction solution is decolorized, concentrated, cooled, crystallized and dried to obtain pyridine hydrobromide. The beneficial effects of the invention are: the mother liquor produced in the production process of pyridine hydrochloride, creatively introduces a phase transfer aid as calcium chloride, and the overall recovery rate of pyridine is increased from 50% to 90%.

According to a first aspect, the present invention relates to a process and apparatus for the production of aromatic compounds, in which the raffinate (16) from an aromatic extraction unit (14) is sent to a dedicated catalytic reforming unit (17) to produce a reformate effluent (18), which is successively treated by: a recontacting section (4) to separate hydrogen (5); a stabilization section (7) to separate C1-C2 hydrocarbon compounds (8) and C3-C4 or C3-C5 hydrocarbon compounds (9); and a reformate separation column (11) to separate a C6-C8 fraction (12) and a C8+ fraction (13), the C6-C8 fraction (12) being sent back to the aromatic extraction unit (14). The present invention also relates to a method for modifying an existing apparatus for the production of aromatic compounds, comprising installing the process according to the first aspect in the existing apparatus. Figure 1 to be published