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1. 发明授权

US5675052A Hydrocarbon alkylation process 失效
标题翻译：烃烷基化方法
公开(公告)号：US5675052A
公开(公告)日：1997-10-07
申请号：US528959
申请日：1995-09-15
申请人： Raghu Menon , Ramakrishnan Ramachandran , Virginia Malik , Martin Bulow
发明人： Raghu Menon , Ramakrishnan Ramachandran , Virginia Malik , Martin Bulow
IPC分类号： C07C2/58 , C07C7/00 , C07C7/04 , C07C7/12 , C07C7/144 , C07C9/14 , C07C9/16 , C07C2/56
CPC分类号： C07C7/005 , C07C9/16
摘要： A hydrocarbon stream is cracked to produce a hot gaseous stream which is compressed and cooled to condense almost all of the hydrocarbons contained in the stream. A noncondensed stream remaining after the condensation step, comprised predominantly of hydrogen and C.sub.1 to C.sub.3 hydrocarbons, is subjected to pressure swing adsorption or temperature swing adsorption at an adsorption temperature of about 0.degree. to about 250.degree. C. in a bed of adsorbent which selectively adsorbs ethene and propene, thereby adsorbing substantially all of the ethene and propene from the gas stream. The ethene and/or propene is recovered upon bed regeneration. Higher alkenes are separated from alkanes by various methods.
摘要翻译：烃流被裂化以产生热气流，其被压缩和冷却以使包含在流中的几乎所有的烃都冷凝。在主要由氢和C1至C3烃组成的缩合步骤之后残留的非冷凝流在吸附床中在约0至约250℃的吸附温度下进行变压吸附或变温吸附，其选择性吸附乙烯和丙烯，从而从气流中吸收基本上所有的乙烯和丙烯。在床再生时回收乙烯和/或丙烯。高级烯烃通过各种方法与烷烃分离。

2. 发明授权

US5322927A Method for producing polymers 失效
标题翻译：生产聚合物的方法
公开(公告)号：US5322927A
公开(公告)日：1994-06-21
申请号：US939276
申请日：1992-09-02
申请人： Ramakrishnan Ramachandran , Virginia Malik
发明人： Ramakrishnan Ramachandran , Virginia Malik
IPC分类号： C08F2/00 , C08F6/00 , C08F10/00
CPC分类号： C08F6/001 , C08F10/00
摘要： Polyolefins are produced by a process which includes the steps of: polymerizing an olefin in a reaction zone; removing unreacted olefin from the polymer in a flash chamber and recycling the unreacted olefin to the reaction zone; stripping unreacted olefin from the polymer by passing a stripping gas through the polymer in a stripping zone; passing the unreacted olefin from the stripping zone at superatmospheric pressure through an adsorbent which selectively adsorbs olefins; depressurizing the adsorbent to produce a substantially pure olefin and recycling the substantially pure olefin to the reaction zone; purging the adsorbent bed with a nonadsorbable gas to remove residual unreacted olefin from the adsorbent; and passing the purge gas-unreacted olefin to the stripping zone to be used as stripping gas.
摘要翻译：聚烯烃通过包括以下步骤的方法制备：在反应区中聚合烯烃; 在闪蒸室中从聚合物中除去未反应的烯烃并将未反应的烯烃再循环到反应区; 通过使汽提气体通过汽提区中的聚合物，从聚合物中汽提未反应的烯烃; 在超大气压下将来自汽提区的未反应的烯烃通过选择性吸附烯烃的吸附剂; 使吸附剂减压以产生基本上纯的烯烃并将基本上纯的烯烃再循环到反应区; 用吸附剂净化吸附剂床以从吸附剂中除去残留的未反应烯烃; 并将吹扫气体 - 未反应的烯烃通入汽提区，以用作汽提气体。

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