14results about "Extraction purification/separation" patented technology

The application discloses a method for separating C9~C 15 Monomer alpha-olefins, comprising the following steps: 1) high-temperature Fischer-Tropsch synthesis oil is cut by fractionation; 2) C9~C 15 The fraction is subjected to extraction deoxygenation and dearomatization by using a composite solvent to obtain C9~C 15 Alkyl olefin material and oxygen-rich and aromatic-rich material; 3) C9~C 15 Alkyl olefin material is subjected to alkyl olefin separation by using a metal-modified molecular sieve adsorbent and a simulated moving bed to obtain C9~C 15 Mixed olefins and mixed alkanes; 4) C9~C 15 Mixed olefins are subjected to normal and isomeric olefin separation by using a silicalite or ZSM-5 molecular sieve as an adsorbent and a simulated moving bed to obtain C9~C 15 Normal olefins and C9~C 15 Isomeric olefins; 5) C9~C 15 Normal olefins are cut by fractionation to obtain monomer alpha-olefins in sequence. The method is simple in process and can efficiently separate monomer alpha-olefins with high carbon.

A process for producing monomers is disclosed. The process comprises hydrocracking a pyrolysis oil stream in a hydrocracking reactor over a hydrocracking catalyst in the presence of a hydrocracking hydrogen stream at hydrocracking conditions to open rings present in said pyrolysis oil stream to produce a hydrocracked effluent stream. The hydrocracked effluent stream is fractionating in a fractionation column to provide a naphtha stream. The naphtha stream is contacted with a NEP catalyst and hydrogen to produce a light paraffinic stream or with a reforming catalyst to produce an aromatics stream.

This invention provides a method for separating polycyclic aromatic hydrocarbons (PAHs), belonging to the field of PAH separation technology. The method involves first mixing a mixed solvent and the mixture to be separated, followed by filtration to obtain a filter cake and a filtrate. Then, a back-extraction agent is mixed with the filtrate for separation. The mixed solvent is either a naphthyl-based mixed solvent or an imidazole-based mixed solvent, and the mixture to be separated is either a mixture containing bicyclic and tricyclic aromatic hydrocarbons or a mixture containing tricyclic and tetracyclic aromatic hydrocarbons. This invention utilizes a naphthyl-based mixed solvent to separate mixtures containing bicyclic and tricyclic aromatic hydrocarbons, and an imidazole-based mixed solvent to separate mixtures containing tricyclic and tetracyclic aromatic hydrocarbons. Furthermore, the naphthyl-based mixed solvent or the imidazole-based mixed solvent can be recycled. The separation method provided by this invention is simple in procedure, low in energy consumption, and has a simple process flow.

The application discloses a coal gas water heavy aromatic hydrocarbon separation device in the field of coal gas water treatment, which comprises a vacuum filtration assembly, an open top, used for realizing vacuum filtration of heavy aromatic hydrocarbon raw materials; a centrifugal extraction assembly, a feed end connected with a discharge end of the vacuum filtration assembly, used for centrifugal extraction of extraction liquid filtered by the vacuum filtration assembly; a chromatography assembly, connected with a discharge end of the centrifugal extraction assembly through a feeding assembly, the feeding assembly is used for feeding fluid extracted by the centrifugal extraction assembly into the chromatography assembly, and the chromatography assembly is used for column layering of the fluid extracted by the centrifugal extraction assembly; and a separation method; the application has the beneficial effects that: through the vacuum filtration assembly, the centrifugal extraction assembly and the chromatography assembly, layer-by-layer extraction of heavy aromatic hydrocarbons is realized, compared with the existing heavy aromatic hydrocarbon separation of a fractionating tower, energy consumption is smaller, and the precision of separated products is higher.

Provided is a method for producing a cycloolefin, comprising subjecting a monocyclic aromatic hydrocarbon to partial hydrogenation reaction with hydrogen in an aqueous zinc sulfate solution in the presence of a ruthenium catalyst, wherein the aqueous zinc sulfate solution contains dimethylamine, and the partial hydrogenation reaction is performed with a nitrogen concentration in the aqueous zinc sulfate solution adjusted to 0.5 to 3000 mg / L or an acetic acid concentration in the aqueous zinc sulfate solution adjusted to 1 × 10-3 to 100 mg / L.

This invention discloses a ternary supramolecular eutectic solvent, its preparation method, and its applications. The ternary supramolecular eutectic solvent is composed of a hydrogen bond acceptor, a hydrogen bond donor, and a silver salt. In application, the solvent is mixed with vegetable oil, and through assisted enhanced extraction, phase separation, and back-extraction, high-purity squalene can be obtained efficiently. This invention utilizes the synergistic effect of the hydrophobic inclusion of cyclodextrin and the specific complexation of double bonds by silver ions, significantly enhancing the targeted binding and separation ability of squalene. This solvent system is green and low in toxicity, simple to prepare, and the extraction method is highly efficient and selective. The solvent can be recycled, overcoming the shortcomings of existing technologies such as low extraction efficiency, high pollution, and high cost. It has broad application prospects in the field of green extraction of plant-derived squalene.

The application relates to the field of chemical purification technology, in particular to a high-efficiency farnesene purification method and device based on a molecular distillation technology, which comprises the following steps: at least two-stage molecular distillation processes are adopted to separate raw material liquid containing beta-farnesene and an extractant, wherein the operation temperature of the highest-stage molecular distillation process is less than or equal to 70 DEG C, and the absolute pressure is less than or equal to 40 Pa. The method is operated at extremely low temperature and extremely high vacuum, the thermal polymerization of beta-farnesene is fundamentally inhibited, and high-efficiency, continuous and high-yield purification is realized without adding a polymerization inhibitor.

The present application relates to the technical field of petroleum chemical industry, and particularly relates to 1-butene prepared from etherized C4. The 1-butene is prepared through the process of alkyl-alkene separation, selective hydrogenation, deep etherization, precise rectification and methanol recovery. The alkyl-alkene separation is used to enrich the content of alkene. In the case of high alkene content, the 1-butene is easier to separate, and the loss of 1-butene is smaller. The 1-butene product is separated first after deep etherization, and then the methanol recovery process is carried out. On the one hand, the methanol is enriched in the separation of 1-butene, and the methanol enters the top of the light-removing tower, which can reduce the amount of C4 that needs to be treated in the methanol recovery, improve the concentration of methanol, and reduce the energy consumption of methanol recovery. On the other hand, water is used as an extractant in the methanol recovery process. Therefore, if the methanol recovery is carried out before the separation of 1-butene product, the water content of 1-butene may exceed the standard. The acidic substances brought by deep etherization will cause the reflux tank at the top of the light-removing tower to be severely corroded in water.

The present application relates to a kind of comprehensive utilization method of ethylene cracking C5, comprising the following steps: (1) ethylene cracking C5 by thermal polymerization reaction, alkyn component, cyclopentadiene (CPD) is polymerized to generate mixture (F2);(2) the material obtained in the first step is sent to separation column separation, the bottom material is sent to flash tank, after removing heavy component, DCPD hydrogenation resin polymerization raw material is obtained, the top is obtained separation product (F3);(3)the separation product (F3) obtained in the second step is sent to extraction unit, and elastomer raw material and curing agent special material are obtained.The process flow of the present application is simple, production energy consumption is low, the requirement to equipment is not high, and it is suitable for scale production application.

The application discloses a limonene extraction agent in tire pyrolysis oil, wherein 30-60wt% p-aminoacetanilide and 40-70wt% quinoline are contained in the extraction agent; the extraction agent changes the interaction force between substances by itself group, and then changes the relative volatility between key components, so that the limonene product can reach more than 95% of industrial grade purity, and the yield of the limonene product also reaches more than 85%.

This invention belongs to the field of bioengineering technology, specifically relating to a preparation process for nano-sized water-soluble squalene. The process includes the following steps: S1, corn flour is treated and then mixed with pure water, followed by enzymatic hydrolysis using a compound enzyme to obtain a corn saccharification liquid for later use; S2, *Saccharomyces cerevisiae* GS-A3 is inoculated into a culture medium containing the corn saccharification liquid for fermentation; S3, after centrifugation of the fermentation broth, crude squalene is obtained by supercritical CO2 extraction; S4, after molecular distillation, the product is nano-sized. This invention uses corn as raw material, utilizing abundant starch resources, converting it into glucose through enzymatic hydrolysis, and producing squalene in *Saccharomyces cerevisiae* via the MVA pathway. This invention prepares high-yield, high-purity squalene, and through a special nano-saccharification process, improves the stability of squalene, extends its shelf life during application, and significantly improves its bioavailability. Furthermore, the technology used in this invention meets the requirements of green environmental protection.

To provide a method for purifying a flow of synthetic crude oil.SOLUTION: A method for purifying a flow of synthetic crude oil includes a step of supplying a flow of synthetic crude oil, a step of cleaning the flow of the synthetic crude oil with first water-soluble cleaning liquid at a first temperature, so as to obtain a flow of first purified synthetic crude oil, and a step of cleaning the flow of the first purified synthetic crude oil with second water-soluble cleaning liquid at a second temperature, so as to obtain a flow of second purified synthetic crude oil, wherein the first water-soluble cleaning liquid is basic, the second water-soluble cleaning liquid is acid, and the second temperature is lower than the first temperature. A method for producing synthetic crude oil includes a step of producing a flow (1) of synthetic crude oil by depolymerization of, preferably, a synthetic resin material, particularly, a synthetic resin waste, and a step of purifying the flow (1) of the synthetic crude oil according to the method of the present invention.SELECTED DRAWING: Figure 1

The application relates to the field of monomer synthetic chemistry and discloses a continuous preparation process of benzocyclobutene primary product, which comprises a continuous vacuum cracking section and a refrigeration impurity removal section, a temperature rising HCl removal and extraction section, a washing, drying and extractant recovery section. The process solves the defects of low yield of the benzocyclobutene primary product synthesized by the vacuum cracking method, intermittent reaction, the fact that HCl components in the cracking product cannot be effectively recovered, the fact that the product is easy to emulsify in the washing process of the cracking product, and the fact that the alkali solution is large in quantity. The benzocyclobutene primary product prepared by the application can be used as a raw material for preparing electronic-grade benzocyclobutene, and is favorable for solving the current problems in chips, semiconductors and advanced composite materials.