116results about "Ether preparation by compound addition" patented technology

Systems and methods for producing MTBE are disclosed. A C4 feed stream containing isobutylene and other C4 hydrocarbons is fed into a reactor unit for producing MTBE. The effluent of the reactor unit comprising MTBE is further processed to produce a MTBE product stream that comprises at least 90 wt. % MTBE. At least a portion of the MTBE product stream is then recycled back to the reactor unit.

A method for producing a (poly)alkylene glycol monoalkyl ether includes reacting an olefin and a (poly)alkylene glycol in a reactor in a presence of a catalyst. The method also includes recovering at least a portion of raw materials used for the production to use the recovered raw materials again as a raw material, where at least one of the recovered raw materials contains an olefin. A mass of a branched olefin relative to a mass sum of the branched olefin and a linear olefin contained in the recovered raw materials is controlled not to exceed 20 mass %.

The invention relates to a method and device for preparing low-carbon olefins, and the method comprises the following steps: S1, contacting raw oil with a catalytic conversion catalyst in a catalytic conversion reactor for catalytic conversion reaction to obtain a catalytic conversion reaction product; s2, separating the catalytic conversion reaction product to obtain ethylene and propylene as well as a first circulating olefin flow containing butene and / or a second circulating olefin flow containing C5 + olefin; s3, enabling the olefin material to enter an etherification unit, and contacting the olefin material with an alcohol raw material under an etherification condition to obtain a circulating ether material and etherified olefin; and S4, enabling at least one part of etherified olefin to enter an isomerization unit, and carrying out isomerization reaction in the presence of an isomerization catalyst to obtain isomerized olefin. According to the method disclosed by the invention, the conversion of ethers into low-carbon olefins can be realized, the yield and selectivity of ethylene and propylene are improved, the yield of methane is reduced, the content of methanol in the product is reduced to the greatest extent, and the conversion of low-cost methanol into low-carbon olefins is realized.

This application relates to the field of organic synthesis technology, specifically disclosing a process for preparing tert-butyl vinyl ether. The raw materials include solid tert-butanol, acetylene, tetrahydrofuran solvent, and potassium hydroxide catalyst, supplemented with auxiliary materials such as type 3A molecular sieves and activated alumina adsorbents. The preparation method involves: after dehydration and purification of the raw materials, the materials are introduced into a reaction vessel; temperature and pressure are controlled, and the reaction endpoint is monitored using an infrared spectrometer; byproducts are quenched and acetylene is recovered; the process involves multi-stage condensation, water washing to remove impurities, distillation separation, and solvent purification and recycling, with simultaneous integration of waste heat recovery and continuous material feeding. The tert-butyl vinyl ether prepared by this process, as an important fine chemical intermediate, can be used in coatings, adhesives, and polymer material modification, possessing advantages such as high purity and good stability. The preparation method achieves efficient utilization of materials and energy through multi-stage synergistic linkage, combining the advantages of green environmental protection, continuous and stable operation, and high resource utilization.

A system for producing ether includes a first etherification reactor system containing first catalyst and producing a first reaction effluent when supplied with alcohol and olefinic hydrocarbon feedstock, a second etherification reactor system containing second catalyst and producing a second reaction effluent when supplied with the first reaction effluent, and a distillation column receiving the second reaction effluent at a feed-point between the bottom and the top of the distillation column. The produced ether is taken out from the bottom of the distillation column. Volume of the first catalyst contributing the production of the first reaction effluent is at most 15% of total volume of the first catalyst and the second catalyst contributing the production of the second reaction effluent. The first etherification reactor system acts as a guard-bed reactor which removes unwanted components from the feed and thus protects the second etherification reactor system.

A process for producing ethylene and at least one of butanol and an alkyl tert-butyl ether from field butane includes separating the field butane into an n-butane stream and an isobutane stream; cracking the n-butane stream to obtain a cracked product stream comprising n-butane, 1- butene, 2-butene, butadienes, or a combination comprising at least one of the foregoing; and at least one of the following: (1) separating the cracked product stream to obtain a butane stream and a butene stream, and reacting the butene stream with water to obtain a fuel additive comprising butanol, and (2) dehydrogenating the isobutane stream in a dehydrogenation unit to form an isobutene stream and reacting the isobutene stream with an aliphatic alcohol to produce an alkyl tert-butyl ether.

Systems and methods for processing a C3 and C4 hydrocarbon mixture have been disclosed. The C3 and C4 hydrocarbon mixture is first processed in an isomerization unit to isomerize n-butane to form isobutane. The resulting effluent stream from the isomerization unit comprising primarily isobutane and C3 hydrocarbons, collectively, is flowed into a separation unit configured to separate the effluent stream to form a C3 stream comprising C1 to C3 hydrocarbons and a C4 stream comprising primarily isobutane. The isobutane in the C4 stream is further dehydrogenated to form isobutene, which is further flowed into an MTBE synthesis unit as a feedstock for producing MTBE.

A method for supplying deaerated water to a chemical plant, wherein the chemical plant includes a distillation column for separating a reaction effluent including water and a product. The method includes charging aerated water (water having an oxygen content greater than 50 ppbw, such as greater than 1 ppmw) to the distillation column. The aerated water in the distillation column can then be distilled to produce an oxygen-containing overhead and a bottoms fraction including deaerated water. The deaerated water in the bottoms fraction can be transported to and utilized in upstream or downstream unit operations. The reaction effluent is fed to the distillation column, converting the distillation column from an operation that separates oxygen from water to an operation that separates the product from water.

This invention provides novel fluorine-containing diether compounds. [Solution] Formula (1) below: JPEG2026065628000011.jpg30128 (In formula (1), R1 represents a fluorine atom or a perfluoroalkyl group having 1 to 10 carbon atoms, R2 may be the same or different, consisting of a methyl group, an ethyl group, -CH2CF3, or -CH2(C2F4). n Showing H n represents an integer between 1 and 10 (inclusive). A fluorine-containing diether compound represented by the following:

The invention relates to a process for producing high-purity 1-butene and high-purity isobutene from two C4 hydrocarbon streams, in which the two streams are partially processed together. Furthermore, the present invention also relates to an apparatus for carrying out the process according to the invention.

A system for producing ether includes a processing system that receives alcohol and olefinic hydrocarbon feedstock and includes a first etherification reactor system that produces a first reaction effluent. A distillation column system receives a mixture containing the first reaction effluent to produce ether. A side flow outlet withdraws a side flow from the distillation column system and a second etherification reactor system receives the side flow and produces a second reaction effluent. The second reaction effluent is mixed with the first reaction effluent, and this mixture is supplied to the distillation column system. The side flow makes it possible to produce a given amount of ether with a smaller amount of catalyst material.

A process for making hydrofluoroethers, the process comprising: •A) providing a mixture comprising one more polar aprotic organic solvents having a boiling point measured at 1 atm (1.01 bar) of from 60° C. to 170° C. and one or more chemical compounds carrying at least one —OH group which is part of an alcohol or of a phenol group, and •B): reacting said one or more chemical compounds carrying at least one —OH group with one or more fluorinated olefin in the presence of a basic catalyst thus providing a reacted mixture comprising one or more hydrofluoroethers.

This production method of a fluorine-containing polyether compound involves producing the compound of formula (3) by reacting the compound of expression (1) and the compound of expression (2) in a ratio such that the compound of formula (2) exceeds 1 mol per 1 mol of the compound of expression (1), esterifying, fluorinating and subsequently reacting with an alcohol to produce a fluorine-containing polyether compound in which both terminals have been functionalized. Here, R1 represents a fluorine atom, etc., R2 and R3 represent a divalent hydrocarbon group of 1-20 carbons.　(1) ... CF2=CR1-O-R2-O-CR1=CF2, (2) ... HO-CH2R3CH2-OH

The invention discloses a reaction kettle for catalytic synthesis reaction and a use method of the reaction kettle. The reaction kettle comprises a kettle body (4); the stirring mechanism comprises a driving device (2) and a stirring paddle (5) arranged in the kettle body (4); and the intrusive pressure-bearing gas guide structure comprises a gas guide tube section (3) extending into the kettle body (4). The tail end of the gas-guide tube section (3) is positioned in a mixing area acted by blades of the stirring paddle (5), and a plurality of gas-guide holes (9) are formed in the tube wall of the gas-guide tube section (3). The structure is used for directly introducing a pressurized gas-phase raw material into a liquid reaction system in the kettle, so that a traditional gas-liquid two-dimensional interface is broken under the stirring action, and three-dimensional dispersion and efficient mass transfer of the gas-phase raw material in a liquid phase are realized. According to the invention, the interface contact and mass transfer efficiency in the gas-liquid-solid heterogeneous catalytic reaction is obviously improved, and the method is especially suitable for a distributed catalytic synthesis process requiring a high catalyst utilization rate.

The application relates to the technical field of petroleum chemical industry, and discloses an etherification resin catalyst for inhibiting 1-butene isomerization and a preparation method and application thereof, the preparation method comprises the following raw materials in weight parts: an oil phase which is composed of the following raw materials in weight parts: 80-100 parts of styrene, 20-40 parts of alpha-methylstyrene, 20-40 parts of divinylbenzene, 40-60 parts of a pore former, and 0.5-2 parts of an initiator; and a water phase which is composed of the following raw materials in weight parts: 400-600 parts of water, 3-5 parts of a dispersant, 0.2-0.4 parts of a co-dispersant, 10-14 parts of an electrolyte, and 4-5 parts of a water-phase polymerization inhibitor. The resin catalyst prepared by the application can inhibit the isomerization of 1-butene while maintaining high reaction activity under the condition of low isobutene content.

The invention belongs to the technical field of organic synthesis, and particularly relates to a continuous flow synthesis method and device of triethylene glycol divinyl ether. The method comprises the following steps: preparing a triethylene glycol potassium alcoholate catalyst under strict dehydration conditions; mixing with triethylene glycol in an inert atmosphere to form a raw material solution; continuously introducing the raw material liquid into the upper part of the bubbling reactor, dispersing acetylene gas into microbubbles from the bottom through a distributor, introducing the microbubbles, and carrying out countercurrent contact reaction for 3-5 minutes at 150-160 DEG C and 0.5-0.7 MPa; and separating the product, and purifying and drying the unreacted acetylene for recycling. The corresponding device comprises a raw material preparation unit, a reaction core unit, a gas circulation unit, a product collection unit and a system guarantee unit. According to the invention, the reaction time is shortened to several minutes from the traditional 6-7 hours, the product efficiency per unit time is improved to more than 3.5 times of that of an intermittent method, and the process safety and the raw material utilization rate are obviously improved.

The embodiment of the invention provides a separation method and a separation device for ethylene glycol and 1, 2-butanediol. The method comprises the following steps: carrying out reactive distillation treatment on a to-be-separated system containing ethylene glycol and 1, 2-butanediol and isobutene to obtain an ethylene glycol mono-tert-butyl ether crude product light component and a 1, 2-butanediol crude product heavy component; carrying out first rectification treatment on the ethylene glycol mono-tert-butyl ether crude product light component to obtain a refined ethylene glycol mono-tert-butyl ether light component and an alcohol-containing mixture heavy component; carrying out second rectification treatment on the 1, 2-butanediol crude product heavy component to obtain an alcohol-containing mixture light component and a refined 1, 2-butanediol heavy component; and returning the alcohol-containing heavy component and the alcohol-containing mixture light component to participate in the reactive distillation treatment. According to the method, efficient separation of ethylene glycol and 1, 2-butanediol is realized, and high-valued resource utilization of by-products of a system to be separated is realized at the same time.

Provided are a method for the total synthesis of compound I, SMTP-7 (also known as JX10, BIIB131 or TMS-007) and derivatives, intermediate compounds involved in the total synthesis method of compound I, as well as uses of the intermediate compounds and the synthesis methods thereof.

This application discloses a method for preparing diisopropyl ether from propylene hydration. A raw material containing propylene and water is contacted with a catalyst and reacted to obtain a product containing diisopropyl ether. The catalyst consists of a support and an active component supported on the surface of the support; the support is an Hβ molecular sieve; the active component is selected from at least one of CuO, Fe2O3, and CoO. The reaction is fast, with high yield, and can be applied to large-scale production. The catalyst preparation method is stable, controllable, and reproducible.

A method for producing alkyl ethers, the method comprising: feeding a hydrocarbon feedstock and a first alcohol feedstock to a fixed bed reactor containing an etherification catalyst. The hydrocarbon feedstock and the first alcohol feedstock are contained in the first fixed bed reactor, and react an isoolefin with an alcohol in the presence of an etherification catalyst to produce a first product stream. The first product stream is fed together with a hydrogen feedstock and a second alcohol feedstock to a catalytic distillation reaction system, the catalytic distillation reaction system containing a trifunction catalyst, thereby simultaneously isomerizing at least a portion of the α-olefins, hydrogenating at least a portion of the diolefins, and etherifying at least a portion of the isoolefins and the alcohol to produce a bottoms product and an overhead product. The bottoms product comprises one or more ethers. The overhead product comprises n-alkanes, isoalkanes, unreacted α-olefins, unreacted internal olefins, unreacted isoolefins, and unreacted alcohol.

This invention provides a method and system for preparing ethylene glycol mono-tert-butyl ether, relating to the field of chemical synthesis technology. The method for preparing ethylene glycol mono-tert-butyl ether includes: in a plug flow reactor, ethylene glycol and isobutylene undergo an etherification reaction in the presence of a liquid acid catalyst to obtain a mixture one; the mixture one is subjected to azeotropic separation to obtain a mixture two containing ethylene glycol mono-tert-butyl ether and ethylene glycol di-tert-butyl ether; the mixture two is purified and separated to obtain ethylene glycol mono-tert-butyl ether and ethylene glycol di-tert-butyl ether respectively; the separated ethylene glycol di-tert-butyl ether is returned to the plug flow reactor so that the subsequent etherification reaction can be carried out in the presence of ethylene glycol di-tert-butyl ether. This invention utilizes a plug flow reactor reaction and reactive distillation technology, and employs a liquid acid catalyst to provide a high concentration of protons, reducing the activation energy of the reaction, thereby efficiently activating the reactant molecules and achieving the goal of efficiently producing ethylene glycol mono-tert-butyl ether.

A process includes the steps of contacting an olefin, an alcohol and a metallosilicate catalyst to form oligomers of an alcohol ethoxylate having structure (I), wherein R1 is an alkyl, R2 is an alkyl, and n has a value of 1 to 3; and sulfating the oligomers of Structure (I) to form oligomers of Structure (II), wherein R1 is an alkyl, R2 is selected from the group consisting of an alkyl group, M is selected from the group consisting of a proton, an ammonium cation, a metal cation, a nitrogen cation, a boron cation, a phosphorus cation, triethylamine, triethanolamine, monoethanolamine and combinations thereof, and n has a value of 1 to 3, and wherein 95 mol % or greater of the oligomers of Structure (II) have an n of 1 and 5 mol % or less of the oligomers of Structure (II) have an n of 2 or greater.

Systems and processes for the production of a high purity isobutylene stream, a high purity isooctene stream or for the co-production of a high purity isobutylene and a high purity isooctene. The systems and processes advantageously process mixed C4 hydrocarbon streams via etherification, back cracking, isomerization, and / or dimerization, along with various separation systems, to produce the desired high purity streams.

Provided is a production device, the state of which can be monitored immediately. The production device (10) is for obtaining, through chemical reaction or purification, a target product from at least one raw material of liquid or gas, and comprises: a variable acquisition unit (46) for acquiring a first variable inputted to the production device and a second variable including at least one state variable related to the target product and intermediates produced in the process of obtaining the target product from the raw material; and an estimation unit (47) for estimating the state of the production device on the basis of the first variable and the second variable acquired by the variable acquisition unit.

Provided here are methods and systems for producing 2-methylbuta-1,3-diene from a C4 stream. On such method includes contacting a feed stream that contain 2-methylprop-1-ene and but-1-ene or but-2-ene with methanol over an acid resin catalyst to produce a 2-methoxy-2-methylpropane stream. The method further cracks the 2-methoxy-2-methylpropane stream into a cracked stream containing 2- methylprop-1-ene and methanol. Then, the method metathesizes the 2-methylprop-1-ene from the cracked stream into a first metathesized stream containing ethene and 2,3-dimethyl-2- butene. Next, the method metathesizes at least a portion of 2,3-dimethylbut-2-ene from the first metathesized stream to produce a second metathesized stream containing 2-methyl-2-pentene. Finally, the method dehydrogenates the second metathesized stream to produce a product stream containing 2-methylbuta-1,3-diene.

The invention discloses a method and a device for producing low-carbon olefin by catalytic cracking of heavy hydrocarbon, which can produce high-yield low-carbon olefin and carbon raw materials at the same time, improve the yield and selectivity of ethylene, propylene and butylene, reduce the yield of methane, reduce the alcohol content in the product to the greatest extent, and realize conversion of low-cost alcohol into low-carbon olefin. The method can realize high-selectivity conversion of olefin and alcohol into low-carbon olefin, solves the problem of overhigh yield of methanol cracking methane, maximally obtains ethylene and propylene, improves the selectivity of methane and coke, and realizes high-efficiency utilization of alcohol and fossil resources.

A process for making liquid fuels, especially diesel fuel, from primary alcohols. The process involves subjecting a feedstock comprising primary alcohols to Guerbet coupling to yield a first intermediate mix; subjecting the first intermediate mix to hydrogenolysis to yield a second intermediate mix; and subjecting the second intermediate mix to etherification to yield a liquid fuel suitable for use in internal combustion engines.

The invention discloses a method and device for preparing low-carbon olefins, and the method comprises the following steps: 1) feeding methyl tert-butyl ether into a catalytic conversion reactor through an atomizing nozzle, and carrying out contact reaction on the methyl tert-butyl ether and a catalytic conversion catalyst under effective conditions to obtain a reaction product containing ethylene, propylene, butylene and C5 + olefins; and 2) feeding the olefin material into an etherification device to obtain methyl tert-butyl ether, and returning the methyl tert-butyl ether and / or etherified olefin to the catalytic conversion reactor. The method can improve the selectivity and yield of low-carbon olefins, obviously reduces the yield of methane in dry gas, and has good economic and social benefits.

A molecule having a formula (7) for use as a fuel in a combustion engine: and wherein said molecule is a di(2-ethylhexyl) ether.

The invention discloses a continuous synthesis method of p-tert-butoxychlorobenzene, and belongs to the technical field of organic synthesis. The method comprises the following steps: continuously pumping a parachlorophenol solution and an isobutene solution into a tower reactor for reaction, and continuously feeding a reaction solution into an extraction tower for separation and purification. According to the invention, the tower reactor is combined with continuous extraction, so that the whole process from reaction to post-treatment is continuous, and the production efficiency is greatly improved; according to the method, efficient reaction can be realized under mild conditions, the process control is stable, side reaction is effectively inhibited, and the product yield is high; meanwhile, equipment is safe and reliable, the comprehensive production cost is remarkably reduced, and the method is suitable for industrial large-scale application.