Invention Grant
- Patent Title: Multi-stage process and apparatus for recovering dichlorohydrins
- Patent Title (中): 用于回收二氯丙醇的多级方法和装置
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Application No.: US12595480Application Date: 2008-04-11
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Publication No.: US08664453B2Publication Date: 2014-03-04
- Inventor: Danil Tirtowidjojo , Andrei S. Merenov , Christian D. Kneupper , Bruce D. Hook , Anil I. Mehta
- Applicant: Danil Tirtowidjojo , Andrei S. Merenov , Christian D. Kneupper , Bruce D. Hook , Anil I. Mehta
- Applicant Address: US MI Midland
- Assignee: Dow Global Technologies Inc.
- Current Assignee: Dow Global Technologies Inc.
- Current Assignee Address: US MI Midland
- International Application: PCT/US2008/059968 WO 20080411
- International Announcement: WO2008/128004 WO 20081023
- Main IPC: C07C29/82
- IPC: C07C29/82

Abstract:
A process and apparatus for recovering dichlorohydrins from a mixture comprising dichlorohydrins, one or more compounds selected from esters of dichlorohydrins, monochlorohydrins and/or esters thereof, and multihydroxylated-aliphatic hydrocarbon compounds and/or esters thereof, and optionally one or more substances comprising water, chlorinating agents, catalysts and/or esters of catalysts is disclosed. The mixture is distilled or fractionated to separate a lower boiling fraction comprising dichlorohydrin(s) from the mixture to form a higher boiling fraction comprising the residue of the distillation or fractionation. The higher boiling fraction is stripped to recover remaining dichlorohydrins. Advantages include more efficient recovery of dichlorohydrins for a given distillation column, less waste due to avoiding the conditions conducive to the formation of heavy byproducts, and reduced capital investment in recovery equipment.
Public/Granted literature
- US20100137652A1 MULTI-STAGE PROCESS AND APPARATUS FOR RECOVERING DICHLOROHYDRINS Public/Granted day:2010-06-03
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