Invention Grant
- Patent Title: Process and apparatus for recovery of dichlorohydrins via codistillation
- Patent Title (中): 通过共蒸馏回收二氯代醇的方法和装置
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Application No.: US13835184Application Date: 2013-03-15
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Publication No.: US08926916B2Publication Date: 2015-01-06
- Inventor: Danil Tirtowidjojo , Andrei S. Merenov , Christian D. Kneupper , Bruce D. Hook , Anil Mehta
- Applicant: Dow Global Technologies LLC
- Applicant Address: US MI Midland
- Assignee: Dow Global Technologies LLC
- Current Assignee: Dow Global Technologies LLC
- Current Assignee Address: US MI Midland
- Main IPC: B01D3/36
- IPC: B01D3/36 ; C07C29/82 ; B01D3/00 ; B01D3/14 ; B01D3/38

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 stripped to recover dichlorohydrin(s) while distilling or fractionating the mixture to separate a lower boiling fraction comprising dichlorohydrin(s) from the mixture in one step. 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
- US20130202497A1 PROCESS AND APPARATUS FOR RECOVERY OF DICHLOROHYDRINS VIA CODISTILLATION Public/Granted day:2013-08-08
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