Patents by Inventor Thomas C. Eisenschmid

Thomas C. Eisenschmid has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220288574
    Abstract: The present invention generally relates to processes for the recovery of rhodium from a catalyst purge stream from a C6 or higher olefin hydroformylation process.
    Type: Application
    Filed: October 20, 2020
    Publication date: September 15, 2022
    Inventors: Marinus A. Bigi, Michael A. Brammer, Thomas C. Eisenschmid, Glenn A. Miller, George R. Phillips, Amarnath Singh
  • Publication number: 20220143590
    Abstract: Embodiments of the present invention relate to processes to prepare a spent catalyst fluid from a hydroformylation process for precious metal recovery. In one embodiment, a process comprises (a) removing a spent catalyst fluid from an active hydroformylation reaction system, wherein the spent catalyst fluid comprises the hydroformylation reaction catalyst and is substantially free of non-hydrolyzable triorganophosphorous compounds; and (b) adding a non-hydrolyzable triorganophosphorous compound to the spent catalyst fluid from step (a) prior to storing the fluid or prior to shipping for precious metal recovery.
    Type: Application
    Filed: May 20, 2020
    Publication date: May 12, 2022
    Inventors: Michael C. Becker, Thomas C. Eisenschmid, Glenn A. Miller
  • Patent number: 10792652
    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.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: October 6, 2020
    Assignee: Dow Technology Investments LLC
    Inventors: Michael A. Brammer, William N. Felsted, II, Thomas C. Eisenschmid
  • Publication number: 20200047171
    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.
    Type: Application
    Filed: November 6, 2017
    Publication date: February 13, 2020
    Inventors: Michael A. Brammer, William N. Felsted, II, Thomas C. Eisenschmid
  • Patent number: 10478812
    Abstract: The catalyst solution used in a hydroformylation process is prepared for storage by first reducing its acid concentration and/or water content, and then storing the solution under a blanket of syngas and/or an inert gas. Alternatively, or in addition to, the catalyst solution can be stored with an aqueous buffer comprising materials that will neutralize and/or absorb the acid species within the catalyst solution.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: November 19, 2019
    Assignees: Dow Technology Investments LLC, BASF SE
    Inventors: Thomas C. Eisenschmid, Michael C. Becker, Donald L. Campbell, Jr., Michael A. Brammer, Glenn A. Miller, Edward Adrian Lord, Jens Rudolph, Hans-Rüdiger Reeh
  • Patent number: 10131608
    Abstract: A hydroformylation process wherein a water-soluble amine is contacted with the reaction fluid, liquid from the reactor is sent to an extraction zone, and a neutralized phosphorus acidic compound is at least partially removed from the extraction zone.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: November 20, 2018
    Assignee: Dow Technology Investments LLC
    Inventors: Glenn A. Miller, Thomas C. Eisenschmid, Michael A. Brammer, Michael C. Becker, Rick B. Watson
  • Patent number: 10023516
    Abstract: Catalytic metal loss when using a hydroformylation catalyst comprising an organophosphite ligand is ameliorated by adding CO to a strip gas vaporizer.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: July 17, 2018
    Assignee: Dow Technology Investments LLC
    Inventors: Michael A. Brammer, George R. Phillips, Thomas C. Eisenschmid, Irvin B. Cox, Robert Hetterley, Michael John Bainbridge
  • Publication number: 20170355656
    Abstract: Catalytic metal loss when using a hydroformylation catalyst comprising an organophosphite ligand is ameliorated by adding CO to a strip gas vaporizer.
    Type: Application
    Filed: November 18, 2015
    Publication date: December 14, 2017
    Inventors: Michael A. Brammer, George R. Phillips, Thomas C. Eisenschmid, Irvin B. Cox, Robert Hetterley, Michael John Bainbridge
  • Publication number: 20170233322
    Abstract: A hydroformylation process wherein a water-soluble amine is contacted with the reaction fluid, liquid from the reactor is sent to an extraction zone, and a neutralized phosphorus acidic compound is at least partially removed from the extraction zone.
    Type: Application
    Filed: March 10, 2015
    Publication date: August 17, 2017
    Inventors: Glenn A. Miller, Thomas C. Eisenschmid, Michael A. Brammer, Michael C. Becker, Rick B. Watson
  • Patent number: 9688598
    Abstract: A multi-reaction train hydroformylation process wherein a common product-catalyst separation zone is employed.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: June 27, 2017
    Assignee: DOW TECHNOLOGY INVESTMENTS LLC
    Inventors: Thomas C. Eisenschmid, Morteza Mokhtarzadeh, Cloid R. Smith, III, Michael C. Becker, George R. Phillips, Michael A. Brammer, Glenn A. Miller, Rick B. Watson, Irvin B. Cox, Edward A. Lord, Martin Smidt
  • Patent number: 9573870
    Abstract: A heterocyclic nitrogen stabilizing agent is employed to reduce the rate of catalyst deactivation in a hydroformylation process.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: February 21, 2017
    Assignee: Dow Technology Investments LLC
    Inventor: Thomas C. Eisenschmid
  • Publication number: 20160257635
    Abstract: A multi-reaction train hydroformylation process wherein a common product-catalyst separation zone is employed.
    Type: Application
    Filed: December 9, 2014
    Publication date: September 8, 2016
    Inventors: Thomas C. Eisenschmid, Morteza Mokhtarzadeh, Cloid R. Smith, III, Michael C. Becker, George R. Phillips, Michael A. Brammer, Glenn A. Miller, Rick B. Watson, Irvin B. Cox, Edward A. Lord, Martin Lucas Smidt
  • Patent number: 9382180
    Abstract: A hydroformylation process that tolerates a high level of methanol in the feed.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: July 5, 2016
    Assignee: Dow Technology Investments LLC
    Inventors: Glenn A. Miller, Thomas C. Eisenschmid, Rick B. Watson, Michael A. Brammer, Michael C. Becker
  • Patent number: 9328047
    Abstract: A process for stabilizing a phosphite ligand against degradation in a hydroformylation reaction fluid, said process comprising adding an epoxide to the reaction fluid, and further comprising separating one or more phosphorus acidic compounds from the reaction fluid by treating the reaction fluid with an aqueous buffer solution under conditions sufficient to neutralize and remove at least some amount of the phosphorus acidic compounds from the reaction fluid.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: May 3, 2016
    Assignee: Dow Technology Investments LLC
    Inventors: Glenn A. Miller, Thomas C. Eisenschmid, Michael A. Brammer, Rick B. Watson
  • Publication number: 20150376101
    Abstract: A heterocyclic nitrogen stabilizing agent is employed to reduce the rate of catalyst deactivation in a hydroformylation process.
    Type: Application
    Filed: March 7, 2014
    Publication date: December 31, 2015
    Inventor: Thomas C. EISENSCHMID
  • Publication number: 20150307430
    Abstract: A hydroformylation process that tolerates a high level of methanol in the feed.
    Type: Application
    Filed: November 21, 2013
    Publication date: October 29, 2015
    Inventors: Glenn A. Miller, Thomas C. Eisenschmid, Rick B. Watson, Michael A. Brammer, Michael C. Becker
  • Publication number: 20150232403
    Abstract: A process for stabilizing a phosphite ligand against degradation in a hydroformylation reaction fluid, said process comprising adding an epoxide to the reaction fluid, and further comprising separating one or more phosphorus acidic compounds from the reaction fluid by treating the reaction fluid with an aqueous buffer solution under conditions sufficient to neutralize and remove at least some amount of the phosphorus acidic compounds from the reaction fluid.
    Type: Application
    Filed: September 9, 2013
    Publication date: August 20, 2015
    Inventors: Glenn A. Miller, Thomas C. Eisenschmid, Michael A. Brammer, Rick B. Watson
  • Patent number: 8884072
    Abstract: The extraction process for removing metal salts from an organic hydroformylation reaction fluid (“HRF”) prior to returning the HRF to a reaction zone of a hydroformylation process, the extraction process comprising the step of contacting the HRF with an aqueous buffer solution, is improved by contacting the HRF with water in addition to that present in the aqueous buffer solution, i.e., with added water.
    Type: Grant
    Filed: November 3, 2011
    Date of Patent: November 11, 2014
    Assignees: Dow Technology Investments LLC, BASF SE
    Inventors: Glenn A. Miller, Michael A. Brammer, Donald L. Campbell, Jr., Thomas C. Eisenschmid, Adrian Lord, Jens Rudolph, Hans-Rüdiger Reeh, Hans-Günter Thelen, Maximilian Walter
  • Patent number: 8664451
    Abstract: Control of an in-series, multiple, e.g., two, reaction zone, hydroformylation process for producing normal (N) and iso (I) aldehydes at a N:I ratio, the process comprising contacting an olefinically unsaturated compound, e.g., propylene, with carbon monoxide, hydrogen and a catalyst comprising (A) a transition metal, e.g., rhodium, (B) an organobisphosphite, and (C) an organomonophosphite ligand, the contacting conducted in first and subsequent reaction zones and at hydroformylation conditions comprising an olefinically unsaturated compound partial pressure in each zone, the control exercised by decreasing the olefinically unsaturated compound partial pressure in the first reaction zone to decrease the N:I ratio or increasing the olefinically unsaturated compound partial pressure in the first reaction zone to increase the N:I ratio.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: March 4, 2014
    Assignee: Dow Technology Investments LLC
    Inventors: Thomas C. Eisenschmid, Glenn A. Miller, Jeffrey S. Sawrey, Michael A. Brammer
  • Publication number: 20140051568
    Abstract: The catalyst solution used in a hydroformylation process is prepared for storage by first reducing its acid concentration and/or water content, and then storing the solution under a blanket of syngas and/or an inert gas. Alternatively, or in addition to, the catalyst solution can be stored with an aqueous buffer comprising materials that will neutralize and/or absorb the acid species within the catalyst solution.
    Type: Application
    Filed: April 13, 2012
    Publication date: February 20, 2014
    Inventors: Thomas C. Eisenschmid, Michael C. Becker, Donald L. Campbell, JR., Michael A. Brammer, Glenn A. Miller, Edward Adrian Lord, Jens Rudolph, Hans-Rüdiger Reeh