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公开(公告)号：US11130725B2
公开(公告)日：2021-09-28
申请号：US17040287
申请日：2019-05-03
Applicant: Dow Technology Investments LLC
Inventor： Michael A. Brammer , Michael C. Becker , William N. Felsted, II
Abstract: The present invention relates to methods for slowing deactivation of a catalyst and/or slowing tetraphosphine ligand usage in a hydroformylation process. In one aspect, a method comprises (a) contacting an olefin with carbon monoxide, hydrogen and a catalyst, the catalyst comprising (A) a transition metal, (B) a tetraphosphine having the structure described herein, and, optionally, (C) a monophosphine having the structure described herein, the contacting conducted in one or more reaction zones and at hydroformylation conditions; and (b) adding additional monophosphine having the structure described herein to a reaction zone.
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公开(公告)号：US20210114961A1
公开(公告)日：2021-04-22
申请号：US17040287
申请日：2019-05-03
Applicant: Dow Technology Investments LLC
Inventor： Michael A. Brammer , Michael C. Becker , William N. Felsted, II
Abstract: The present invention relates to methods for slowing deactivation of a catalyst and/or slowing tetraphosphine ligand usage in a hydroformylation process. In one aspect, a method comprises (a) contacting an olefin with carbon monoxide, hydrogen and a catalyst, the catalyst comprising (A) a transition metal, (B) a tetraphosphine having the structure described herein, and, optionally, (C) a monophosphine having the structure described herein, the contacting conducted in one or more reaction zones and at hydroformylation conditions; and (b) adding additional monophosphine having the structure described herein to a reaction zone.
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公开(公告)号：US10792652B2
公开(公告)日：2020-10-06
申请号：US16340769
申请日：2017-11-06
Applicant: Dow Technology Investments LLC
Inventor： Michael A. Brammer , William N. Felsted, II , Thomas C. Eisenschmid
Abstract: Disclosed herein are methods to rejuvenate a deactivated hydroformylation catalyst solution wherein the solution comprises rhodium, polydentate phosphine ligands, and polydentate phosphine ligand degradation products. In one embodiment, such methods comprise adding a peroxide to the deactivated hydroformylation catalyst solution.
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公开(公告)号：US20200047171A1
公开(公告)日：2020-02-13
申请号：US16340769
申请日：2017-11-06
Applicant: Dow Technology Investments LLC
Inventor： Michael A. Brammer , William N. Felsted, II , Thomas C. Eisenschmid
Abstract: Disclosed herein are methods to rejuvenate a deactivated hydroformylation catalyst solution wherein the solution comprises rhodium, polydentate phosphine ligands, and polydentate phosphine ligand degradation products. In one embodiment, such methods comprise adding a peroxide to the deactivated hydroformylation catalyst solution.
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