Invention Grant
- Patent Title: Processes for producing organophosphorous compounds
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Application No.: US15752413Application Date: 2016-09-07
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Publication No.: US10239901B2Publication Date: 2019-03-26
- Inventor: Marinus A. Bigi , Michael A. Brammer , Glenn A. Miller
- 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/US2016/050485 WO 20160907
- International Announcement: WO2017/058476 WO 20170406
- Main IPC: C07F9/6574
- IPC: C07F9/6574 ; B01D9/00

Abstract:
The present invention relates to processes for producing organophosporous compositions having low acid content as well as processes for reprocessing partially degraded organophosporous compositions that contain high levels of phosphorous acid. In one embodiment, a process comprises: (a) receiving a solid organophosphite compound that has been recrystallized or triturated, wherein the solid organophosphite compound comprises phosphorous acid; (b) dissolving the solid organophosphite compound in an organic solvent; (c) treating the solution with a weakly basic adsorbent; and (d) collecting the treated organophosphite solution, wherein the acid content of the organophosphite following step (d) is 30 ppm or less.
Public/Granted literature
- US20190002486A1 PROCESSES FOR PRODUCING ORGANOPHOSPHOROUS COMPOUNDS Public/Granted day:2019-01-03
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