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1. 发明授权

US5763691A Ethylene glycol process 失效
标题翻译：乙二醇工艺
公开(公告)号：US5763691A
公开(公告)日：1998-06-09
申请号：US756800
申请日：1996-11-26
申请人： Kazuki Kawabe , Kazuhiko Murata, deceased , Toshiyuki Furuya
发明人： Kazuki Kawabe , Kazuhiko Murata, deceased , Toshiyuki Furuya
IPC分类号： C07C29/12 , C07D317/38 , C07C27/00
CPC分类号： C07C29/12 , C07D317/38
摘要： The present invention relates to a process for producing ethylene glycol from ethylene oxide wherein ethylene oxide in a gas resulting from oxidation of ethylene is absorbed in a specific absorbing solution, is allowed to react with carbon dioxide, converted into ethylene carbonate, and then subjected to hydrolysis to produce ethylene glycol. According to the present invention, a large energy consuming step such as stripping of ethylene oxide and separation of excess amounts of water during the ethylene glycol production becomes unnecessary and the process can be greatly simplified by combining the ethylene oxide absorption step and the carbonation step.
摘要翻译：本发明涉及一种由环氧乙烷生产乙二醇的方法，其中将由乙烯氧化产生的气体中的环氧乙烷吸收在特定的吸收溶液中，与二氧化碳反应，转化为碳酸亚乙酯，然后进行水解生成乙二醇。根据本发明，在乙二醇生产中，消耗环氧乙烷和过量水分离等耗能很大的步骤是不必要的，通过组合环氧乙烷吸收步骤和碳酸化步骤可大大简化该方法。

2. 发明授权

US5559255A Method of recovering ethylene oxide 失效
标题翻译：回收环氧乙烷的方法
公开(公告)号：US5559255A
公开(公告)日：1996-09-24
申请号：US523199
申请日：1995-09-05
申请人： Kazuki Kawabe , Kazuhiko Murata , Toshiyuki Furuya
发明人： Kazuki Kawabe , Kazuhiko Murata , Toshiyuki Furuya
IPC分类号： C07D301/32 , C07D303/04
CPC分类号： C07D301/32 , Y02P20/51
摘要： The present invention relates to a method of recovering ethylene oxide comprising the steps of:bringing a mixed gas containing ethylene oxide into contact with an absorbent so as to cause the absorbent to absorb the ethylene oxide; andstripping and separating said ethylene oxide to recover it from the absorbent, where the absorbent contains propylene carbonate. By employing the present invention, it is possible to reduce the heat recovery loss resulting from cooling the absorbent at the time of transfer from the stripping step to the absorption step, to about one-third that compared with a conventional system using water, without producing the by-product ethylene glycol.
摘要翻译：本发明涉及回收环氧乙烷的方法，包括以下步骤：使含有环氧乙烷的混合气体与吸收剂接触，以使吸收剂吸收环氧乙烷; 并汽提和分离所述环氧乙烷以从吸收剂中回收，其中吸收剂含有碳酸丙烯酯。通过采用本发明，可以减少在从汽提步骤转移到吸收步骤时将吸收剂冷却所产生的热回收损失，与使用水的常规系统相比，减少到约三分之一，而不会产生副产物乙二醇。

3. 发明授权

US06187972B1 Process for producing an alkylene glycol 有权
标题翻译：亚烷基二醇的制备方法
公开(公告)号：US06187972B1
公开(公告)日：2001-02-13
申请号：US09369893
申请日：1999-08-09
申请人： Kazuki Kawabe , Kouichi Nagata
发明人： Kazuki Kawabe , Kouichi Nagata
IPC分类号： C07C2909
CPC分类号： C07C29/12 , C07C29/095 , Y02P20/584 , C07C31/202 , C07C29/16 , C07C31/125
摘要： A process for producing an alkylene glycol, which is a continuous process for producing an alkylene glycol comprising the following steps (1) to (4), wherein the hydrolysis step (2) is divided into a plurality of stages, and the hydrolysis is carried out so that the water concentration in a reaction stage wherein the conversion of the alkylene carbonate is at least 60%, is from 15 to 30 wt %: (1) a carbonating step of reacting an alkylene oxide with carbon dioxide gas in the presence of a carbonating catalyst to form a reaction solution containing an alkylene carbonate, (2) a hydrolysis step of hydrolyzing the reaction solution obtained in step (1) while releasing carbon dioxide gas, to form an aqueous alkylene glycol solution, (3) a distillation step of distilling the aqueous alkylene glycol solution to obtain at least a dehydrated alkylene glycol and a solution containing the carbonating catalyst, and (4) a recycling step of supplying the solution containing the carbonating catalyst to the carbonating step (1).
摘要翻译：一种制备亚烷基二醇的方法，其是用于生产亚烷基二醇的连续方法，其包括以下步骤（1）至（4），其中水解步骤（2）被分成多个阶段，并且进行水解使得碳酸亚烷基酯的转化率为至少60％的反应阶段的水浓度为15〜30重量％：（1）碳酸化步骤，使烯化氧与二氧化碳气体在存在下反应形成含有碳酸亚烷基酯的反应溶液的碳酸化催化剂，（2）在释放二氧化碳气体的同时水解步骤（1）中获得的反应溶液的水解步骤，形成亚烷基二醇水溶液，（3）蒸馏步骤蒸馏亚烷基二醇水溶液以获得至少脱水的亚烷基二醇和含有碳酸化催化剂的溶液，和（4）将含有碳酸化催化剂的溶液供给到t的再循环步骤碳酸化工序（1）。

4. 发明授权

US06380419B2 Process for simultaneous production of ethylene glycol and carbonate ester 失效
标题翻译：同时生产乙二醇和碳酸酯的方法
公开(公告)号：US06380419B2
公开(公告)日：2002-04-30
申请号：US09760785
申请日：2001-01-17
申请人： Kazuki Kawabe
发明人： Kazuki Kawabe
IPC分类号： C07C6806
CPC分类号： C07C68/065 , C07C29/12 , C07C29/128 , C07C2601/14 , C07C69/96 , C07C31/202 , C07C31/20 , C07C31/205 , C07C31/207 , C07C31/276
摘要： Ethylene glycol and a carbonate ester are simultaneously produced by reacting ethylene oxide and carbon dioxide to form ethylene carbonate, hydrolyzing of the solution containing the ethylene carbonate to obtain ethylene glycol, purifying ethylene glycol, transesterifying ethylene carbonate and a hydroxyl group-containing compound to form the corresponding carbonate ester and ethylene glycol, separating the carbonate ester and separating ethylene carbonate.
摘要翻译：乙二醇和碳酸酯同时通过环氧乙烷和二氧化碳反应生成碳酸亚乙酯，水解含有碳酸亚乙酯的溶液得到乙二醇，纯化乙二醇，酯交换碳酸亚乙酯和含羟基的化合物形成相应的碳酸酯和乙二醇，分离碳酸酯并分离碳酸亚乙酯。

5. 发明授权

US6080897A Method for producing monoethylene glycol 有权
标题翻译：一乙二醇生产方法
公开(公告)号：US6080897A
公开(公告)日：2000-06-27
申请号：US271435
申请日：1999-03-18
申请人： Kazuki Kawabe
发明人： Kazuki Kawabe
IPC分类号： C07C29/09 , C07C29/12 , C07C29/80 , C07C27/00
CPC分类号： C07C29/12 , C07C29/095 , C07C29/80
摘要： Disclosed is a method for producing monoethylene glycol, which is a method for producing ethylene glycol that comprises a carbonation step in which ethylene oxide is allowed to react with carbon dioxide in the presence of a carbonation catalyst thereby effecting formation of a reaction solution containing ethylene carbonate, a hydrolysis step in which the reaction solution is converted into an ethylene glycol aqueous solution by hydrolyzing ethylene carbonate in the reaction solution and a distillation step in which purified ethylene glycol and a catalyst solution containing the carbonation catalyst are obtained from the ethylene glycol aqueous solution by distillation, wherein the improvement resides in that the reaction is carried out in the presence of a carbonation catalyst using a bubble column reactor by supplying ethylene oxide, carbon dioxide and water into the reactor.
摘要翻译：公开了一种生产乙二醇的方法，其是一种生产乙二醇的方法，其包括碳酸化步骤，其中环氧乙烷在碳酸化催化剂存在下与二氧化碳反应，从而形成含有碳酸亚乙酯的反应溶液，其中通过水解反应溶液中的碳酸亚乙酯将反应溶液转化为乙二醇水溶液的水解步骤和其中从乙二醇水溶液获得纯化的乙二醇和含有碳酸化催化剂的催化剂溶液的蒸馏步骤其中改进在于，在碳酸化催化剂存在下，使用鼓泡塔反应器通过向反应器中供应环氧乙烷，二氧化碳和水进行反应。

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