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公开(公告)号：US20190185394A1
公开(公告)日：2019-06-20
申请号：US16097734
申请日：2017-05-17
发明人： Michael W. WEBER , Yoshiaki KAWAJIRI , Michael SALCICCIOLI , John R. PORTER , Gaurav AGRAWAL , Dana L. PILLIOD , Siwei GUO , Jason BENTLEY
IPC分类号： C07C7/13 , C07C15/08 , C07C15/073 , B01D53/08
CPC分类号： C07C7/13 , B01D53/08 , B01D2257/7027 , B01J20/165 , C07C15/073 , C07C15/08 , C07C2529/08 , C07C2529/40
摘要： A process to separate paraxylene from a mixture of paraxylene, metaxylene, orthoxylene, and ethylbenzene in a commercial simulated moving bed apparatus in a reduced number of beds is provided, allowing an additional separation to be conducted in the remaining beds. This additional separation may separate another xylene isomer, ethylbenzene, or a non-aromatic C8+ hydrocarbon from the raffinate stream produced by the first separation. A PowerFeed process is used to recover paraxylene in a first adsorption zone containing 8-16 beds of a conventional 24-bed simulated moving bed adsorption apparatus, and then a second separation may be conducted in a second adsorption zone containing the remaining beds.
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公开(公告)号：US20190184311A1
公开(公告)日：2019-06-20
申请号：US16074338
申请日：2017-02-09
发明人： Michael W. WEBER , Siwei GUO , Yoshiaki KAWAJIRI , Jason BENTLEY , Gaurav AGRAWAL , Michael SALCICCIOLI , Dana L. PILLIOD
摘要： The process involves the use of two rotary valves to implement Varicol operation of a simulated moving bed apparatus to separate a product from at least one multicomponent feed. In a particular embodiment, paraxylene is separated from a mixture of C8 aromatic hydrocarbons. The use of the Varicol process further enhances the separation of the desired product and provides flexibility with a simulated moving bed apparatus using dual rotary valves.
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