Invention Grant
- Patent Title: Cyclohexanone production process with multiple post-distillation
- Patent Title (中): 环己酮生产过程多次后蒸馏
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Application No.: US12808808Application Date: 2008-12-16
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Publication No.: US08507729B2Publication Date: 2013-08-13
- Inventor: Godefridus Maria J. Van Dortmont , Marleen Horsels , Rudy Francois Maria Jozef Parton , Johan Thomas Tinge
- Applicant: Godefridus Maria J. Van Dortmont , Marleen Horsels , Rudy Francois Maria Jozef Parton , Johan Thomas Tinge
- Applicant Address: NL Heerlen
- Assignee: DSM IP Assets B.V.
- Current Assignee: DSM IP Assets B.V.
- Current Assignee Address: NL Heerlen
- Agency: Nixon & Vanderhye P.C.
- Priority: EP07024765 20071220
- International Application: PCT/EP2008/067632 WO 20081216
- International Announcement: WO2009/080620 WO 20090702
- Main IPC: C07C45/82
- IPC: C07C45/82 ; B01J8/00

Abstract:
The present invention relates to a method for continuously preparing cyclohexanone from phenol making use of a catalyst comprising at least one catalytically active metal selected from platinum and palladium comprising hydrogenating phenol to form a product stream comprising cyclohexanone and unreacted phenol; separating at least part of the product stream, or at least part of the product stream from which one or more components having a lower boiling point than cyclohexanone have been removed, into a first fraction comprising cyclohexanone and a second fraction comprising phenol and cyclohexanol, using distillation; separating the second fraction into a third fraction, rich in cyclohexanol, and a fourth fraction, rich in phenol, using distillation; —subjecting at least part of the fourth fraction to a further distillation step, thereby forming a fifth fraction and a sixth fraction, wherein the fifth fraction is enriched in phenol compared to the sixth fraction, and wherein the sixth fraction comprises side-products having a higher boiling point than phenol, and phenol; and which method is characterized in the additional step of continuously or intermittently separating at least part of the sixth fraction to yet a further distillation step, thereby forming a seventh fraction and an eight fraction, wherein the seventh fraction is enriched in phenol compared to the eight fraction, and wherein the eight fraction comprises side-products having a higher boiling point than phenol.
Public/Granted literature
- US20110028675A1 CYCLOHEXANONE PRODUCTION PROCESS WITH MULTIPLE POST-DISTILLATION Public/Granted day:2011-02-03
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