- Patent Title: Processes for recovery of rhodium from a hydroformylation process
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Application No.: US16638420Application Date: 2018-11-02
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Publication No.: US11033890B2Publication Date: 2021-06-15
- Inventor: Marinus A. Bigi , Rick B. Watson
- Applicant: Dow Technology Investments LLC
- Applicant Address: US MI Midland
- Assignee: Dow Technology Investments LLC
- Current Assignee: Dow Technology Investments LLC
- Current Assignee Address: US MI Midland
- International Application: PCT/US2018/058904 WO 20181102
- International Announcement: WO2019/094290 WO 20190516
- Main IPC: C07C45/50
- IPC: C07C45/50 ; B01J31/00 ; B01J38/00 ; B01J31/40 ; B01J31/18 ; B01J38/02 ; B01J38/58

Abstract:
Some embodiments of the present invention relate to processes to recover rhodium from a hydroformylation process. In some embodiments, the process to recover rhodium from the hydroformylation process comprises (a) treating a catalyst-containing stream from the hydroformylation process with 2.5 to 20 weight percent, based on the total weight of the stream, of a water-soluble organic amine of the following structure: wherein R32, R33, and R34 are each independently alkyls and ethoxylates, and wherein no more than one of R32, R33, and R34 is alkyl; (b) heating the resulting solution in the presence of syngas to a temperature of at least 65° C. to generate a rhodium-rich phase and a supernatant; and (c) removing the supernatant to recover the rhodium-rich phase.
Public/Granted literature
- US20200269226A1 PROCESSES FOR RECOVERY OF RHODIUM FROM A HYDROFORMYLATION PROCESS Public/Granted day:2020-08-27
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