377results about "Ether preparation by compound addition" patented technology

Disclosed is an apparatus for generating a product passport, the apparatus comprising: one or more computing node(s) and one or more computer-readable media having thereon computer-executable instructions that are structured such that, when executed by the one or more computing node(s), cause the apparatus to perform the following steps:receiving a request to provide a first decentral identifier associated with at least one first physical entity of a product supply chain and / or a recycling product chain;in response to the request, providing the first decentral identifier associated with the at least one first physical entity of the product supply chain and / or the recycling product chain;generating a product passport including the first decentral identifier and data related to the at least one first physical entity of the product supply chain and / or the recycling product chain;providing the product passport for access by a data consuming service under control of a data providing service associated with a data owner.

A process for manufacturing methanol having a deuterium content of less than 90 ppm based on the total hydrogen content, the process comprising the steps of: (a) providing hydrogen having a deuterium content of less than 90 ppm based on the total hydrogen content by water electrolysis using power generated at least in part from non-fossil renewable resources; (b) providing carbon dioxide; (c) reacting hydrogen and carbon dioxide in the presence of a catalyst to form methanol.

The present invention relates to a group of cannabinoid derivatives as pharmaceutically active compounds and methods of preparation thereof. The cannabinoid derivatives of the invention are analogues of cannabidiol (CBD). CBD is a non-psychoactive cannabinoid which has been used to treat various diseases and disorders. While such treatments hold promise, there remains a need in the art for more effective treatments and this has been brought about by way of the cannabinoid derivatives of the invention

The utility model relates to an energy-saving production device for preparing methyl tert-butyl ether by an isobutane dehydrogenation method. A raw material gasifier is arranged between the catalytic distillation tower feeding and discharging heat exchanger and the catalytic distillation tower, a temperature sensor is arranged on a feeding pipeline from the raw material gasifier to the catalytic distillation tower, a gas phase at the top of the catalytic distillation tower is divided into two pipelines, a compressor is additionally arranged on one pipeline, and an automatic flow regulating valve is additionally arranged on the other pipeline; a cold-side material outlet of the distillation tower feeding and discharging heat exchanger is connected with a cold-side material inlet of the raw material gasifier, a cold-side material outlet of the raw material gasifier is connected with a feeding hole in the middle lower part of the catalytic distillation tower, and a tower top discharging pipeline of the catalytic distillation tower is respectively connected with an inlet of the compressor and a hot-side material inlet of the condenser; an outlet pipeline of the compressor is connected with a hot measuring material inlet of the raw material gasifier, and a hot measuring material outlet of the raw material gasifier is connected with a liquid inlet of the return tank. According to the utility model, a heat pump technology is adopted, so that the heating power of the tower kettle reboiler is reduced, and the steam consumption is reduced; and the method is more economical.

The invention discloses a start-up method of an ETBE device and a production method of ETBE. The ETBE device comprises a catalytic rectifying tower newly provided with an ETBE catalyst bed, the start-up method comprises the following steps: introducing methanol into the catalytic rectifying tower to displace moisture in the ETBE catalyst bed, and when the mass content of water in a discharged material of the catalytic rectifying tower is less than 15%, starting up the catalytic rectifying tower; and introducing a C4 material into the catalytic rectifying tower, and removing methanol in the catalytic rectifying tower and the ETBE catalyst bed layer of the catalytic rectifying tower. The method has the advantages that a large amount of hydrous ethanol is not generated in the catalyst dehydration process, residual ethanol does not exist in the catalyst, dehydration raw materials are easy to obtain, the dehydration effect is enhanced, the time for starting a device is short, and the quantity of unqualified products is greatly reduced.

Computer-implemented methods and apparatuses for assigning or attributing at least one environmental attribute associated with input material(s) to target material(s), wherein the target material(s) are produced by a chemical production network using at least one of the input materials).

Disclosed are systems for producing an output material associated with a digital asset, methods for producing an output material associated with a digital asset, apparatuses for generating a digital asset, computer-implemented methods for generating a chemical passport, computer program elements for generating a digital asset, uses of an output material associated with a digital asset, uses of a digital asset, products produced from the output material and associated with a digital asset, a digital asset including one or more decentral identifier(s) and data related to the environmental impact data, apparatuses for producing a product associated with the digital asset and methods for producing a product associated with the digital asset.

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.

The invention relates to the technical field of MTBE production, in particular to a high-yield MTBE catalytic distillation device. The problem that the temperature of a reaction section in an existing device can only be roughly monitored is solved. Comprising a fixing shell, the fixing shell is rotationally connected with a partition part, the partition part is provided with storage modules which are vertically distributed at intervals, the storage modules are used for storing catalysts, flow guide folded plates which are evenly distributed in the circumferential direction are fixedly connected into the fixing shell, and the flow guide folded plates are located between every two adjacent storage modules. A temperature sensor is arranged at the bent position of the flow guide folded plate, a temperature control module is arranged on the lower portion of the flow guide folded plate, a motor is installed on the fixing shell, and an output shaft of the motor is in transmission with the partition piece through a gear set. The flow direction of materials is guided through the flow guide folded plate, so that most of the materials pass through the temperature sensor in the downward flowing process, and the monitoring precision of the device on the temperature of the materials at different positions is improved.

The utility model provides a methyl tert-butyl ether production device with switchable reactors, which is characterized in that a plurality of reactors are arranged, and a communicating pipeline and a switching valve are arranged between a feeding system and each reactor, so that raw materials C4 and methanol can selectively enter one of the reactors through valve switching operation; and the priority of the three reactors can be adjusted at will according to the activity condition of the catalyst in the production process, and any reactor can be independently switched and used without influencing the normal operation of the device.

The invention relates to a process for obtaining isobutene from an isobutene containing C4-hydrocarbon mixture (1) in a plant comprising an etherification unit (3), a first distillation unit (5), an ether cleavage unit (10) and a second distillation unit (12), the process comprising: (a) contacting the C4-hydrocarbon mixture (1) with a primary alcohol (2) and reacting the mixture with the primary alcohol in the presence of an acidic catalyst to form the corresponding alkyl tert-butyl ether in the etherification unit (3); (b) distilling the reaction mixture (4) from the etherification unit (3) in the first distillation unit (5), a C4-hydrocarbon raffinate being withdrawn as the overhead product (6), and the alkyl tert-butyl ether being withdrawn as the bottom product (7); (c) vaporizing the bottom product from the first distillation unit (5) in an evaporator (8) obtaining a vapor stream (9); (d) reacting the vapor stream (9) of step (c) in the presence of an acidic catalyst obtaining isobutene and the primary alcohol as reaction products in the ether cleavage unit (10); (e) distilling the reaction mixture (11) from the ether cleavage unit (10) in the second distillation unit (12), isobutene being withdrawn as the overhead product (13), the primary alcohol and diisobutene being withdrawn as the bottom product (14) and being recycled to the etherification unit (3); wherein a purge stream (15) containing high boiling components with a normal boiling point higher than that of the alkyl tert-butyl ether is withdrawn from the evaporator (8) in step (c).

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.

Provided is a method for effectively reducing the concentration of a hydrofluoroether-olefin (HFEO) contained in a mixture comprising a hydrofluoroether (HFE) and the HFEO. This method for reducing the concentration of an HFEO is one in which the HFE is a compound (A) represented by formula (1) and the HFEO is a compound (B) represented by formula (2), the method comprising reacting the compound (B) contained in the mixture with a compound (C) which is any of an alcohol, chlorine, and hydrogen.　(1): R2-O-R1-O-R3 (2): R2-O-R1-O-R4 In formulae (1) and (2), R1 is a C1-C4 alkylene group, R2 and R3 are each independently a C2-C4 fluoroalkyl group, and R4 is a C2-C4 fluoroalkenyl group.

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.

The embodiment of the present invention discloses a propylene glycol monovinyl ether and a synthesis method and application thereof. The propylene glycol monovinyl ether provided by the present invention contains a three-carbon structure in the molecule, which enhances the adsorption of the ethylene end and increases the anchoring force with the adsorbate. The polycarboxylic acid water reducer synthesized by using the propylene glycol monovinyl ether as an initiator to prepare a macromonomer has stronger adsorption to cement particles, and can improve the water reduction and plasticity of the water reducer. The synthesis method and application of the improved propylene glycol monovinyl ether of the present invention expand the channels and varieties of preferred polyether monomer initiators, and have broad application prospects.

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.

The present application relates to the technical field of fluorine-containing intermediate synthesis, and specifically discloses a synthetic method of 2-bromo-2,3,3,3-tetrafluoroethyl propionate. A synthetic method of 2-bromo-2,3,3,3-tetrafluoroethyl propionate, comprising the following steps: addition reaction: using hexafluoropropylene and ethanol to carry out addition reaction under the action of a base catalyst to obtain 1,1,2,3,3,3-pentafluoropropyl ether; hydrolysis reaction: 1,1,2,3,3,3-pentafluoropropyl ether is hydrolyzed under the action of an acid catalyst to obtain 2,3,3,3-tetrafluoroethyl propionate; bromination reaction: 2,3,3,3-tetrafluoroethyl propionate and a bromination agent are subjected to bromination reaction to obtain 2-bromo-2,3,3,3-tetrafluoroethyl propionate. The synthetic method in this application, not only has high yield, and the raw material source is simple and corrosion-free, the reaction is simple and easy to operate, the process is simple and suitable for industrial production, low cost, and high economic benefit.

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 present invention relates to the preparation and application of difluoroalkene oxime ether derivatives. The general structural formula of the difluoroalkene oxime ether derivatives is shown in formula (I):. It has been found through research that the difluoroalkene oxime ether derivatives disclosed in the present invention have good biological activities against common and severely harmful agricultural pests / mites such as Plutella xylostella, Ostrinia furnacalis, Spodoptera frugiperda, and Tetranychus cinnabarinus. Therefore, they can be used as insecticidal / acaricidal candidate substances for the development of new, highly efficient, low-toxic, and environmentally friendly insecticides.

An apparatus for generating a chemical product passport is disclosed, the apparatus comprising one or more computing nodes and one or more computer readable media having computer executable instructions configured, when executed by the one or more computing nodes, to cause the apparatus to perform the following steps: receiving a request to provide emission data and a non-central identifier associated with a data owner, in response to the request, generating a chemical product passport including the non-central identifier and data related to the emission data, and providing the chemical product passport for access by a data consumption service under control by a data providing service associated with the data owner.

The present disclosure relates to processes for producing isobutylene and isobutylene- based polymers. In some embodiments, a process includes dehydrating a bio-based isobutanol in an isobutanol dehydration unit to form a butenes composition. The process includes providing the butenes composition to one or more of an acid extraction unit or a butyl ether formation unit.

The present invention relates to a method of preparing methyl tert-butyl ether including a reaction step of reacting methanol with iso-butene in the presence of an acid catalyst to generate methyl tert-butyl ether; and a purification step of purify the reaction product obtained by the reaction step by introducing the reaction product into a reaction distillation column including a packing stage containing an acid catalyst, wherein a flow ratio of a recycle to a fresh feed is different per the volume of each reactor. Accordingly, the amount of unreacted iso-butene and the amount of impurities included in the reactor may be reduced, resulting in reduction of the amount of thermal energy used in a reaction distillation column. [Representative Figure] FIG. 1

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.

The present invention relates to the field of fine chemical technology, particularly to the field of IPC C07C303. More specifically, it relates to a cycloaliphatic ethoxylated sodium bisphenol sulfonate and a preparation method thereof. The general structural formula is shown in Formula 1: wherein X comprises one of O, CH2, and (CH3)2C, and R comprises an unsaturated ring. The preparation method comprises the following steps: S1, an etherification reaction: adding a cycloolefin, an ethoxylated bisphenol compound, and an acidic catalyst to a reaction solvent, heating the reaction, and removing the solvent, catalyst, and excess cycloolefin to obtain an alicyclic ethoxylated bisphenol intermediate; S2, a sulfonation neutralization reaction: cooling the intermediate, adding a sulfonating reagent dropwise for reaction, and post-treating the intermediate to obtain the product. The preparation method is simple and mild, and the product has good water solubility and surface activity.

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.