500results about "Hydrocarbon purification/separation" patented technology

The present invention provides a divinylbenzylfluorene and a preparation method and application thereof, a divinylbenzylfluorene hydrocarbon resin and a preparation method and application thereof, and relates to the technical field of high-frequency substrate materials. The divinylbenzylfluorene hydrocarbon resin prepared by using one or a mixture of any proportion of 9,9-bis(2-vinylbenzyl)-9H-fluorene and 9,9-bis(4-vinylbenzyl)-9H-fluorene provided by the present invention as raw materials has very low dielectric constant and dielectric loss tangent, and the higher the content of 9,9-bis(2-vinylbenzyl)-9H-fluorene, the smaller the dielectric loss tangent of the divinylbenzylfluorene hydrocarbon resin; moreover, the solubility of 9,9-bis(2-vinylbenzyl)-9H-fluorene and 9,9-bis(4-vinylbenzyl)-9H-fluorene provided by the present invention in toluene and 2-butanone is high, and has good application prospects as a cross-linking agent of the main resin or olefin resin component of a high-frequency substrate.

The utility model relates to the technical field of mixed xylene refining and purifying, in particular to a mixed xylene refining and purifying device. Comprising a shell, the upper end of the shell fixedly communicates with an inlet pipe, the lower end of the shell fixedly communicates with an outlet pipe, a temperature control assembly is arranged in the upper portion of the shell, and an interception assembly is arranged in the lower portion of the shell and communicates with a condenser. By monitoring the temperature of the heat-conducting medium in the oil outlet pipe in real time, the high-temperature gaseous water-containing mixed xylene can be effectively cooled.

Disclosed are antioxidants used in compositions and methods to stabilize synthetic feedstock derived from plastic. Some methods disclosed herein include adding an antioxidant composition to a plastic-derived synthetic feedstock composition. Some methods disclosed herein include heating plastic under substantially oxygen free conditions at a temperature of from about 400° C. to about 800° C. to produce a pyrolysis effluent, distilling the pyrolysis effluent, recovering the synthetic feedstock, and adding a stabilizer to the synthetic feedstock to reduce contamination. The disclosure also provides compositions including a synthetic feedstock derived from plastic and an antioxidant.

The invention discloses an ether polymerization inhibitor special for a butadiene extraction system and a preparation method of the ether polymerization inhibitor. The ether polymerization inhibitor comprises the following raw materials: a polymerization inhibitor intermediate, a solvent and a dispersing agent, the production process comprises the following steps: preparing a polymerization inhibitor intermediate, preparing a solvent, compounding, feeding and mixing, filtering, removing impurities and detecting. According to the method, firstly, a polymerization inhibitor 701 and diethylene glycol normal pressure etherification process is adopted, and beta-hydroxyethyl methyl ether is introduced to seal a terminal group, so that the power consumption is reduced, the generation of byproducts is inhibited, the solubility of an intermediate acetonitrile is improved to be greater than or equal to 30g / L, and the anti-interference performance is greatly enhanced; the solvent doped with a small amount of silane modified nano diatomite is prepared, impurities can be adsorbed, metal ions can be chelated, the dispersing agent can be assisted to be evenly distributed, the problems that a pure water solvent is single in function and the dispersing agent is prone to agglomeration are solved, and the polymerization inhibition efficiency and the stability of an extraction system are guaranteed.

The invention discloses an ethylene processing tank with a mixing function in the field of chemical processing technology. The ethylene material and the proportioned chemical substances are added into the processing tank body from the material pipe flange, and the mixed material is introduced into the inside of a rotating drum through a material guide component. Floating objects and generated bubbles will be on the upper layer of the liquid material and discharged from the processing tank body through the material guide component. The sediment can be discharged through a slag discharge valve pipe. No shutdown operation is required during the slag discharge process, so that the rotating drum can separate solid residues and reaction products for subsequent collection work, and prevent the slag discharge from causing the reaction products containing ethylene substances to volatilize quickly. The knocking component can contact the inclined surface of a block by cooperating with the rotation of the knocking component. The knocking component will shrink after being pressed and can rebound quickly when it is separated from the block and knock the rotating drum, so that the residue in the filter holes outside the rotating drum can be shaken off, thereby playing a role in clearing and preventing the filter holes from being blocked and affecting the fluidity of the reaction products in the rotating drum.

The invention belongs to the technical field of chemical engineering and environmental protection, and particularly relates to a method for preparing ethylene from chlorine-containing organic waste. According to the method, the efficient and environment-friendly thermal plasma technology is adopted, the chlorine-containing organic waste is treated by using the gas containing the hydrogen element and the carbon element as the working gas and converted into high-value chemicals such as ethylene and acetylene, and resourceful treatment of the chlorine-containing organic waste is achieved. The working gas can provide a hydrogen-rich reaction atmosphere on one hand, and provides a carbon source on the other hand, so that the yield of ethylene and acetylene is increased. Meanwhile, by adopting a graded quenching technology and regulating and controlling the quenching rates in different temperature ranges in the quenching process, the selectivity and yield of ethylene are greatly improved, the problem that the yield of ethylene in the pyrolysis gas-phase product in the prior art is not high is solved, and effective regulation and control of the composition of the chlorine-containing organic waste pyrolysis gas-phase product are realized.

The invention relates to the technical field of fuel cells, and particularly provides a catalytic reforming hydrogen production fuel cell system for methane separation by a hydrate method. The cell system comprises a methane hydrate reaction module, a methane catalytic reforming module, a fuel cell module and a tail gas collection module. In the coal mining process, due to limitation of technical reasons, most low-concentration coal mine gas can be directly emptied, so that resource waste and environment damage are caused; in recent years, a hydrate technology is widely concerned to be used for separating and storing gas, and the method is relatively safe and can effectively reduce the risk of gas explosion. According to the invention, the low-concentration gas is separated and purified according to the temperature and pressure difference under the condition that different components in the low-concentration gas form hydrates, high-concentration CH4 is used as fuel and enters the fuel cell module, chemical energy is converted into electric energy, and the electric energy is provided for coal mine production and living places; the utilization scene of the low-concentration gas is expanded; and the utilization efficiency of the low-concentration gas is improved.

The present invention discloses a method for catalytic hydrogenation refining of coking crude benzene, which belongs to the technical field of crude benzene hydrogenation refining, and comprises the following steps: preparing a catalyst carrier; preparing a catalyst impregnation liquid; preparing a catalytic hydrogenation catalyst; catalytic hydrogenation refining; and component separation. The present invention adopts high-temperature co-carbonization technology to combine rectorite with pollen to form a modified carbonized pollen with a multi-level pore structure, which significantly enhances the adsorption, thermal stability and catalytic performance. The hollow structure catalyst nanoparticles prepared by the Kirkendall effect not only increase the active sites, but also promote the internal diffusion of reactants and products, effectively improving the catalytic efficiency. At the same time, the chelation effect of the ionic liquid and the synergistic effect of the oxygen-containing functional group realize the effective loading of the catalyst carrier and the catalyst body, enhance the stability and service life of the catalyst, strengthen its catalytic and desulfurization performance, and provide a new way to achieve efficient and environmentally friendly chemical production.

The invention discloses a synergistic catalyst for coking crude benzene hydrofining, a preparation method of the synergistic catalyst and a method for hydrofining coking crude benzene by using the synergistic catalyst. The synergistic catalyst is formed by filling a reactor with a synergistic catalyst Z1 and a synergistic catalyst Z2 in a layered manner according to a specific mass ratio, in the reactor, the synergistic catalyst Z1 is arranged on the upper layer of the synergistic catalyst Z2, the filling mass fraction of the synergistic catalyst Z1 is 10-24%, and the filling mass fraction of the synergistic catalyst Z2 is 76-90%. The catalyst has good selectivity, catalytic activity and stability and long cycle life under the coking crude benzene two-step hydrogenation process condition. By using the catalyst, impurities such as silicon, chlorine, sulfur, nitrogen and the like in crude benzene can be effectively removed, meanwhile, carbon deposition is reduced, the service life of the catalyst is greatly prolonged, the yield of pure benzene cannot be reduced by excessive hydrogenation, and long-period stable operation of equipment is met.

A process for producing ethylene using ethane is described. A process may include oxidative dehydrogenation of ethane to produce a product stream including ethylene, ethane, and a gas having a boiling point lower than ethylene. The product stream can be cooled under mild conditions and then separated to produce a product stream comprising ethylene and ethane and a product stream comprising a gas having a boiling temperature lower than that of ethylene.

A method of manufacturing sugar cane polyvinyl alcohol wherein sugar cane bagasse is processed into polyvinyl alcohol. Processing raw materials including sugar cane bagasse and deionized water. Enzymatically hydrolyzing and using saccharification on the sugar cane bagasse to obtain sugar cane bagasse enzymatic hydrolysate. Fermenting the sugar cane bagasse solution. Distilling the fermented sugar cane bagasse solution to obtain ethanol solution and lignin solution. Transferring the distilled solutions to an ethylene plant area to obtain a polymer grade ethylene product. Transferring the polymer grade ethylene product to an acetic acid evaporator to generate vinyl acetate. Introducing the vinyl acetate into an autoclave with methanol solution wherein said solutions undergo a reflux reaction process. Ethyl acetate is then dissolved in methanol to prepare a polyvinyl acetate solution which undergoes alcoholysis wherein the product is then washed and deionized, yielding polyvinyl alcohol.

To provide a process for producing renewable linear alkylbenzenes from vegetable, animal, nut and / or seed oils, which are biorenewable resources.SOLUTION: The process includes: a linear selective cracking process to crack C14+ chains into C9 to C14 chains which are useful for producing linear alkylbenzene for use in detergents; and a hydroisomerization step to produce paraffins with monomethyl branching which can be reacted with benzene to form monomethyl alkyl benzenes.SELECTED DRAWING: None

The invention provides a catalyst, a preparation method and application of the catalyst in alkyne removal through low-carbon hydrocarbon hydrogenation. The invention provides a catalyst. The catalyst comprises a carrier and an active component, the carrier is a metal composite oxide, the metal composite oxide contains a metal element I, and the metal element I comprises aluminum, copper and titanium; the active component contains a metal element II, and the metal element II is selected from at least one of Mn, Ni, Pd or Ag. The catalyst provided by the invention has the advantages of good activity, high selectivity, good stability and industrial application value when being used for removing alkyne through low-carbon hydrocarbon hydrogenation.

A process for converting naphtha is disclosed. The process comprises contacting a naphtha stream and a hydrogen stream with a catalyst in a reactor to produce a paraffinic stream. The ethane present in the paraffinic stream is converted into ethylene in a steam cracking unit. An ethylene stream is separated from a C3+ hydrocarbon stream and the C3+ hydrocarbon stream is recycled to the reactor.

To provide a method for producing ethylene in high yield by selective hydrogenation of a gas mixture containing high-concentration acetylene generated by a methane pyrolysis process.SOLUTION: There is disclosed a process for converting methane into value-added compounds, wherein a gas mixture containing high-concentration acetylene as well as hydrogen formed through methane pyrolysis (for example, non-oxidative coupling of methane) is selectively hydrogenated in the presence of a bimetallic supported catalyst to obtain ethylene from acetylene in the gas mixture, while unreacted methane and hydrogen are recovered as byproducts and / or additionally recycled.SELECTED DRAWING: Figure 1

An olefin conversion catalyst, its preparation method and its use are disclosed. The olefin conversion catalyst comprises the following components in parts by weight: a) 50-90 parts of a molecular sieve having a 12-membered or more ring structure; b) 0.1-10 parts of an additive component selected from a group IA metal element, a group IIA metal element, or a combination thereof, calculated as oxide; c) 0.1-10 parts of a modifier component selected from silicon, germanium, bismuth, tin, boron, gallium, or a combination thereof, calculated as oxide; and d) 10-49 parts of a carrier component. When the catalyst is used to convert a small amount of olefins in an aromatic rich distillate, the catalyst has the characteristics of high activity, stability, long life, and effective utilization of olefins.

A method of selectively producing oligomers can include contacting at least one antifouling agent with a first amount of at least one aluminum alkyl compound to form at least one antifouling compound comprising the following structure or dimer form thereof: (I); and adding the at least one antifouling compound, an additional amount of the at least one aluminum alkyl compound, the at least one titanate compound, and ethylene to a jet loop reactor to oligomerize the ethylene to produce one or more of 1-butene, 1-hexene, or 1-octene. (I)

The utility model relates to the field of removal devices, and discloses a methyl acetylene and propadiene removal device which comprises an SHP reactor, the SHP reactor is arranged on the right side of the outer wall of a separation device, a conveying pipe is communicated and fixed between the SHP reactor and the separation device, a palladium-gold hydrogenation catalyst is arranged in the SHP reactor, and the SHP reactor is communicated with the separation device. A first valve is arranged in the conveying pipe, a PSA device is arranged on the front side of the outer wall of the SHP reactor, a mounting pipe is fixedly communicated between the PSA device and the SHP reactor, and a second valve is arranged in the mounting pipe. According to the utility model, the SHP reactor is filled with the palladium-gold hydrogenation catalyst and is used for converting methylacetylene and propadiene in a liquid-phase product into monoolefine through reaction, and the indexes of materials at the outlet of the SHP reactor are controlled, so that the dehydrogenation catalyst is prevented from coking, an inner net and an outer net are prevented from being blocked, the operation cycle is prolonged, and the replacement frequency is reduced; and the purpose of saving cost is achieved.

The utility model discloses a hexane filtering device, which relates to the field of hexane filtering, and comprises a second cylinder, the upper end of the second cylinder is connected with a first cylinder, the lower end of the second cylinder is connected with a third cylinder, the upper end of the first cylinder is connected with a plurality of liquid discharge pipes in a penetrating manner, the lower end of the third cylinder is connected with a liquid inlet pipe in a penetrating manner, and the liquid inlet pipe is connected with a liquid outlet pipe in a penetrating manner. A supporting part is arranged on the inner wall face of the second barrel, a first filtering part is arranged in the supporting part, a first screening plate, a second filtering part and a second screening plate are sequentially arranged on the inner wall face of the third barrel from top to bottom, and a guiding part is connected to the upper end of the liquid inlet pipe. The supporting component, the first filtering component, the second filtering component, the first sieve plate and the second sieve plate are arranged and matched together, so that the filtering effect can be improved, particles in the first filtering component and the second filtering component can float up and down, the blocking condition is avoided, and the overall filtering performance is guaranteed.

The invention belongs to the technical field of hydrodesulfurization, and particularly relates to a butyl phosphonic acid modified magnesium-based hydrodesulfurization material and a preparation method thereof. The magnesium-based hydrodesulfurization material is prepared from the following raw materials: magnesium, carbon black and butyl phosphonic acid, and the preparation method comprises the following steps: adding the magnesium into the carbon black for ball milling; carrying out hydrotreating on a solid product obtained by ball milling; adding the hydrotreated solid product into butyl phosphonic acid for ball milling; and carrying out heat treatment on a solid product obtained by ball milling in the previous step to prepare the butyl phosphonic acid modified magnesium-based hydrodesulfurization material. Magnesium hydride in the magnesium-based hydrodesulfurization material is used as a high-activity hydrogen source for hydrodesulfurization of dibenzothiophene in an anthracene oil liquid phase, and high temperature and high pressure are not needed in the hydrodesulfurization process; the surface of magnesium hydride is modified by butyl phosphonic acid, so that dibenzothiophene molecules stand and are adsorbed on the surface of magnesium hydride, a direct hydrogenolysis desulfurization reaction is carried out, and a benzene ring is not subjected to hydrogenation saturation, so that the selectivity of the hydrodesulfurization reaction can be improved.

The invention relates to the technical field of selective hydrogenation, and discloses a method for removing acetylene in mixed gas and application thereof. The method comprises the following steps: carrying out first contact on acetylene-containing mixed gas and a catalyst, and reacting under acetylene selective hydrogenation conditions; wherein the content of acetylene in the mixed gas is 0.03 to 1.8 mol%; the catalyst comprises a carrier, an active component and an auxiliary agent, the active component is Pd, and the carrier comprises elemental Ag, Re oxide and Al2O3. The method provided by the invention can realize efficient and stable removal of acetylene, meets the requirements of polymer grade ethylene, can stably operate for a long time, does not need frequent catalyst regeneration, and better meets the requirements of green and sustainable industrial production.

The utility model relates to a device for producing a monomethyl alkylbenzene product, which is characterized by comprising a deoxidation unit, a natural oil feeding pipeline, a gas-liquid separation unit and a gas-liquid separation unit, a C9 to C28 line in communication with the deoxidation unit; the isomerization unit is communicated with the first pipeline; an isomerization line in communication with the isomerization unit, the isomerization line comprising a monomethyl paraffin; the dehydrogenation unit is communicated with the isomerization pipeline; a dehydrogenation line communicating with the dehydrogenation unit; a selective hydrogenation unit in communication with the dehydrogenation line; a monoolefine line in communication with the selective hydrogenation unit; an alkylation unit in communication with the monoolefine line; and an alkylation effluent line in communication with the alkylation unit. The utility model provides a material flow rich in monomethyl paraffin relative to normal paraffin, wherein the material flow can be used for producing monomethyl alkylbenzene.

The present invention provides a non-precious metal-based catalyst modified with a non-precious metal element in a p-region, and a preparation method and application thereof. The preparation method of the catalyst is: using a post-modification doping method to introduce a non-precious metal element X in a p-region into a MOF structural unit with a non-precious metal M as a node to prepare an M-X-MOF precursor, and after a reduction topological transformation, a supported vM-wX / C catalyst is obtained. In the structural topological process, the X atom enters the gap between the metal M octahedrons, constructing a surface-isolated and electron-deficient M δ+ ‑X active sites, achieving synergistic enhancement of alkyne conversion rate and olefin selectivity. At the same time, some X atoms bond with the C support to form unsaturated coordinated nucleation centers, which enhances its interaction with the active components and inhibits the migration and agglomeration of M during the reaction. The catalyst can be used in the selective hydrogenation of alkynes in the fields of petroleum or fine chemicals, showing high catalytic activity and selectivity, and is easy to recover and reuse.

The invention discloses a pure silica zeolite DD3R hydrogenation catalyst as well as a preparation method and application thereof. The pure silica zeolite DD3R hydrogenation catalyst takes a DD3R molecular sieve as a carrier, and a Cu element and a Pd element are loaded on the carrier; in the pure silica zeolite DD3R hydrogenation catalyst, the mass ratio of the Pd element is 0.2 wt%-0.6 wt%, and the mass ratio of the Cu element is 0.2 wt%-0.7 wt%. The preparation method comprises the following steps: adding the structure-directing agent, the silicon source and the mineralizing agent into deionized water, and uniformly mixing; adding a palladium source and a copper source, then adding a seed crystal, and crystallizing for a certain time; and carrying out suction filtration, washing, drying, roasting and the like on the obtained sample to prepare the pure silica zeolite DD3R hydrogenation catalyst. The catalyst prepared by the invention is used for a reaction for removing trace acetylene in ethylene through thermocatalytic hydrogenation, has high specific surface area, high catalytic activity, high selectivity and high thermal stability, and can still keep relatively high catalytic activity at a high space velocity.

Compositions and methods for inhibiting and retarding polymerization of monomeric compositions are described that use a naphthoquinone and an oxygenated aminophenol. When present in a monomer-containing composition, the combination of naphthoquinone and oxygen-containing aminophenol provides an unexpectedly beneficial anti-polymerization agent effect, thereby inhibiting the formation of unwanted fouling polymers. The anti-polymerization agent combination can be added to a hydrocarbon composition, such as petroleum, that can include a polymerizable component, such as styrene, wherein the hydrocarbon composition is purified or processed, such as under distillation.

A process for inhibiting polymerization, colloid formation and fouling in an atypical high temperature ethylene fractionation system, the process comprising treating the atypical high temperature ethylene fractionation system with a composition comprising an effective amount of one or more quinone methide of formula (I), wherein R1, R2 and R3 are independently selected from the group consisting of H,-OH,-SH,-NH2, alkyl, cycloalkyl, heterocycle and aryl; or one or more phenylenediamine, optionally in combination with one or more hindered phenols. # imgabs0 #

A product and method for reducing fouling of a vinyl aromatic monomer including a first composition comprising an effective amount of one or more dispersants and a second composition comprising an effective amount of one or more polymerization inhibitors, an effective amount of one or more polymerization retarders, or combinations thereof.

The invention relates to the technical field of selective hydrogenation, and discloses a selective hydrogenation method for acetylene in C2 fraction in a sequential separation process, a catalyst and application of the catalyst. The method comprises the following steps: carrying out first contact on reaction gas and a catalyst, and reacting under a selective hydrogenation condition; wherein the reaction gas is obtained by doping H2 and CO into a C2 fraction, and the content of CO is 0.002-0.02 mol% in terms of the total amount of the reaction gas according to the using amount of CO; the C2 fraction comes from C2 fraction material flow at the top of an ethane column in a sequential separation process. The method can obtain extremely high ethylene selectivity under the condition of high space velocity by cooperating with the optimized selective hydrogenation catalyst, has long-term operation capability, and is very suitable for industrial popularization and application.

The present application relates to a dehydrogenation catalyst, a preparation method and application thereof, and a method for preparing butadiene by butene oxidative dehydrogenation, and provides a dehydrogenation catalyst, which comprises: a spinel phase, an alpha-iron oxide phase, and an antioxidant alloy component; the antioxidant alloy component is selected from at least three of IVB group, VIB group and VIII group; the present application introduces hydrogenation active centers by adding an antioxidant metal alloy component in the spinel structure, and hydrogenation reaction is generated by using a small amount of hydrogen generated in the reaction to inhibit the generation of aldehydes, so that the content of aldehydes in the organic by-products of the dehydrogenation product is greatly reduced, and the selectivity of the catalyst is improved.