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1. 发明授权

US6107526A Process for producing ethyl tertiary butyl ether 失效
标题翻译：乙基叔丁基醚的制备方法
公开(公告)号：US6107526A
公开(公告)日：2000-08-22
申请号：US99163
申请日：1998-06-18
申请人： Stanley J. Frey , Scott P. Davis , Steven L. Krupa , Paul R. Cottrell
发明人： Stanley J. Frey , Scott P. Davis , Steven L. Krupa , Paul R. Cottrell
IPC分类号： C07C41/06 , C07C41/42
CPC分类号： C07C41/42 , C07C41/06 , Y02P20/127
摘要： A catalytic distillation process for producing high purity ethyl tertiary butyl ether that contains less than 0.6 weight percent ethanol, and preferably less than 0.07 weight percent ethanol, has been developed. The high purity ethyl tertiary butyl ether is withdrawn directly from a catalytic distillation column; no downstream processing is necessary to remove excess ethanol from the ether product. A stream containing largely normal butane is generated by a C.sub.4 distillation column along with a stream containing isobutane. The stream containing isobutane is dehydrogenated to form a stream containing isobutylene. Ethanol, the stream containing isobutylene, and the stream containing largely normal butane are introduced to an etherification zone containing a catalytic distillation column. The catalytic distillation column is operated under conditions which result in the reaction of the ethanol with the isobutylene to form ethyl tertiary butyl ether. Excess ethanol forms an azeotrope with the normal butane and is distilled with other hydrocarbons into an overhead stream. The ethyl tertiary butyl ether and no more than 0.6 weight percent ethanol are distilled into a bottoms stream and withdrawn directly from the catalytic distillation column.
摘要翻译：已经开发了用于生产含有小于0.6重量％乙醇，优选小于0.07重量％乙醇的高纯度乙基叔丁基醚的催化蒸馏方法。高纯度乙基叔丁基醚直接从催化蒸馏塔中取出; 不需要下游处理来从醚产物中除去过量的乙醇。含有大量正丁烷的料流是由C4蒸馏塔和含有异丁烷的料流产生的。含有异丁烷的物流被脱氢以形成含有异丁烯的物流。将含有异丁烯的物流和含有大量正丁烷的物流引入含有催化蒸馏塔的醚化区。催化蒸馏塔在乙醇与异丁烯反应形成乙基叔丁基醚的条件下运行。过量的乙醇与正丁烷形成共沸物，并与其他烃一起蒸馏成塔顶物流。将乙基叔丁基醚和不超过0.6重量％的乙醇蒸馏到塔底物流中，直接从催化蒸馏塔中取出。

2. 发明授权

US5990361A Process for producing ethyl tertiary butyl ether by catalytic distillation 失效
标题翻译：通过催化蒸馏生产乙基叔丁基醚的方法
公开(公告)号：US5990361A
公开(公告)日：1999-11-23
申请号：US99162
申请日：1998-06-18
申请人： Stanley J. Frey , Scott P. Davis , Steven L. Krupa , Paul R. Cottrell
发明人： Stanley J. Frey , Scott P. Davis , Steven L. Krupa , Paul R. Cottrell
IPC分类号： C07C41/06 , C07C41/42
CPC分类号： C07C41/42 , C07C41/06 , Y02P20/127
摘要： A low pressure catalytic distillation process for producing high purity ethyl tertiary butyl ether that contains less than 0.6 weight percent ethanol, and preferably less than 0.07 weight percent ethanol, has been developed. The high purity ethyl tertiary butyl ether is withdrawn directly from a catalytic distillation column. No downstream processing is necessary to remove excess ethanol from the ether product. A stream containing a significant amount of one or more inert azeotropic agents such as normal butane, isopentane, and isobutane is introduced along with the isobutylene and ethanol reactants into an etherification zone containing a catalytic distillation column. The catalytic distillation column is operated under low pressure conditions which result in the reaction of the ethanol with the isobutylene to form ethyl tertiary butyl ether. The inert azeotropic agent must be present at the inlet to the catalytic distillation column in an amount sufficient to azeotrope excess ethanol and cause the excess ethanol to distill into an overhead stream under the conditions of operation. The preferred azeotropic agent is isopentane. Excess ethanol forms an azeotrope with the azeotropic agent and is distilled with other hydrocarbons into an overhead stream. The ethyl tertiary butyl ether and no more than 0.6 weight percent ethanol are distilled into a bottoms stream and withdrawn directly from the catalytic distillation column.
摘要翻译：已经开发了用于生产含有小于0.6重量％乙醇，优选小于0.07重量％乙醇的高纯度乙基叔丁基醚的低压催化蒸馏方法。高纯度乙基叔丁基醚直接从催化蒸馏塔中取出。不需要下游处理来从醚产物中除去过量的乙醇。将含有大量一种或多种惰性共沸剂如正丁烷，异戊烷和异丁烷的物流与异丁烯和乙醇反应物一起引入含有催化蒸馏塔的醚化区。催化蒸馏塔在低压条件下运行，导致乙醇与异丁烯的反应形成乙基叔丁基醚。惰性共沸剂必须以足以共沸过量乙醇的量存在于催化蒸馏塔的入口处，并使得过量的乙醇在操作条件下蒸馏成塔顶物流。优选的共沸剂是异戊烷。过量的乙醇与共沸剂形成共沸物，并与其他烃一起蒸馏成塔顶馏出物。将乙基叔丁基醚和不超过0.6重量％的乙醇蒸馏到塔底物流中，直接从催化蒸馏塔中取出。

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