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公开(公告)号：US4033617A
公开(公告)日：1977-07-05
申请号：US703342
申请日：1976-07-08
IPC分类号： C07D301/32 , B01D3/14 , C07D303/04
CPC分类号： C07D301/32
摘要： Crude ethylene oxide present in the dilute aqueous solution resulting from the extraction with an aqueous solvent of ethylene oxide from the gaseous stream obtained by catalytic oxidation of ethylene is purified by desorption, liquefaction, distillation in a fractionating column and final desorption treatment to remove absorbed non-condensable gases. The fractionating column is heated by condensation of the water vapor evolved during desorption and a liquid stream of ethylene oxide rich in acetaldehyde is discharged from the bottom, treated to convert a fraction of said acetaldehyde into high-boiling products, distilled to remove the latter as bottoms and returned to the fractionating column.
摘要翻译： 通过由乙烯的催化氧化获得的气流中的环氧乙烷的水性溶剂萃取而得到的稀水溶液中存在的稀水溶液中的粗环氧乙烷通过解吸，液化，分馏塔中的蒸馏和最终解吸附处理来净化， 可冷凝气体。 分馏柱通过在解吸过程中放出的水蒸气的冷凝而被加热，并且从底部排出富含乙醛的环氧乙烷的液体流，经处理以将所述乙醛的一部分转化为高沸点产物，蒸馏除去后者作为 底部并返回分馏塔。
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2.发明授权Process for the simultaneous separation of ethylene oxide and carbon dioxide from the gaseous mixtures obtained in the direct oxidation of ethylene with oxygen 失效在用氧气直接氧化乙烯时获得的气态混合物中同时分离环氧乙烷和二氧化碳的方法
公开(公告)号：US3948621A
公开(公告)日：1976-04-06
申请号：US428570
申请日：1973-12-26
IPC分类号： C07D301/32 , B01D53/14 , B01D19/00
CPC分类号： C07D301/32
摘要： Process for the simultaneous separation of ethylene oxide and carbon dioxide from the gaseous mixtures obtained in the direct oxidation of ethylene with oxygen, comprisingA. cooling the gaseous mixture containing ethylene oxide, unreacted ethylene, water vapour, carbon dioxide and inert gases after addition of methanol to a temperature such that the water vapour present separates in the form of an aqueous methanol solution;B. washing the obtained gaseous mixture in an absorption zone with methanol, the methanol being fed into the intermediate part of the absorption zone as a main methanol stream and into the upper part as a secondary methanol stream, maintaining the temperature of the secondary methanol stream at least about 30.degree.C lower than that of the main methanol stream and removing from the upper part a gaseous mixture being practically free of ethylene oxide and containing carbon dioxide and ethylene and from the lower part of the absorption zone a solution of ethylene oxide in methanol; andC. recovering the ethylene oxide from the methanol solution.
摘要翻译： 将乙烯与氧直接氧化得到的气体混合物同时分离出环氧乙烷和二氧化碳的方法，包括A.将含有乙烯氧化物的气态混合物，不需要的乙烯，水蒸气，二氧化碳和惰性气体加入 甲醇到温度，如水蒸气存在于甲醇溶液形式中分离; B.用甲醇洗涤吸收区中得到的气体混合物，将甲醇装入作为主要甲醇流的吸收区的中间部分，并作为二级甲醇流进入第二部分甲醇流，保持二级甲醇流的温度 至少比主甲醇流低30℃，从上部除去实际上不含环氧乙烷并含有二氧化碳和乙烯的气体混合物，并且从吸收区的下部将环氧乙烷溶液 甲醇; 和C.从甲醇溶液中回收乙烯氧化物。
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公开(公告)号：US4169856A
公开(公告)日：1979-10-02
申请号：US943498
申请日：1978-09-18
IPC分类号： C07C213/04 , C07C215/08 , C07C215/12 , C07C89/02 , C07C89/04
CPC分类号： C07C215/08 , C07C213/04 , C07C215/12
摘要： A process for the preparation of ethanolamines includes passing ammonia in counter-flow with water and a recycled ammoniacal solution through an absorption column provided with internally cooled bubbling-trays to obtain an ammoniacal solution containing from 20 to 50% by weight of ammonia, reacting the ammoniacal solution with ethylene oxide firstly in an isothermal reactor and then in an adiabatic reactor to obtain substantially complete conversion of the ethylene oxide to ethanolamines, removing by means of a desorption column and recycling unreacted ammonia and part of the water from the reaction product, evaporating a greater part of the remaining water in an evaporator and dehydrating the ethanolamines at low pressure.
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公开(公告)号：US3935279A
公开(公告)日：1976-01-27
申请号：US428575
申请日：1973-12-26
IPC分类号： C07C43/04 , C07C20060101 , C07C41/00 , C07C41/02 , C07C41/03 , C07C43/10 , C07C43/11 , C07C67/00 , C08G65/00 , C08G65/28 , C09K3/00 , C11D7/50
CPC分类号： C07C41/03
摘要： A process for the production of ethylene glycol ethers by reacting ethylene oxide with monofunctional aliphatic alcohols, which comprisesReacting a monofunctional aliphatic alcohol and ethylene oxide in a first reaction stage in a molar ratio of from about 3:1 to 20:1;Separating excess alcohol from the ethylene glycol ethers obtained as the reaction products in the first stage;Reacting the ethylene glycol ethers with ethylene oxide in a molar ratio of from about 1:1 to 10:1 and with monoethylene glycol ether in a second reaction stage;Separating the monoethylene glycol ether and the diethylene glycol ether from the reaction products of the second stage, maintaining a weight ratio of the discharged fraction to the recycled fraction of from about 0.5:1 to 5:1.The reaction is carried out under abiabatic conditions in the first stage and under isothermal conditions in the second stage.
摘要翻译： 一种通过使环氧乙烷与单官能脂肪醇反应制备乙二醇醚的方法，其包括在第3阶段至第20阶段的摩尔比中的第一反应阶段中反应单官能醇和乙烯氧化物：
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