Patents by Inventor Donald L. Campbell, JR.

Donald L. Campbell, JR. 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).

  • Method for the preparation of a stabilized organophosphorous compound solution
    Patent number: 10487020
    Abstract: A process involving admixing a ligand and an alkanolamine. The process allows the use of ligand despite the presence of contaminating amounts of phosphorus acid, and improves the shelf life of premixed ligand solutions.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: November 26, 2019
    Assignee: Dow Technology Investments LLC
    Inventors: Michael A. Brammer, George R. Phillips, Glenn A. Miller, Donald L. Campbell, Jr.
  • Methods to store transition metal organophosphorous ligand based catalysts
    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
  • METHOD FOR THE PREPARATION OF A STABILIZED ORGANOPHOSPHOROUS COMPOUND SOLUTION
    Publication number: 20180141881
    Abstract: A process involving admixing a ligand and an alkanolamine. The process allows the use of ligand despite the presence of contaminating amounts of phosphorus acid, and improves the shelf life of premixed ligand solutions.
    Type: Application
    Filed: July 5, 2016
    Publication date: May 24, 2018
    Inventors: Michael A. Brammer, George R. Phillips, Glenn A. Miller, Donald L. Campbell, Jr.
  • Mitigation of fouling in hydroformylation processes by water addition
    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
  • Methods to Store Transition Metal Organophosphorous Ligand Based Catalysts
    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
  • Mitigation of Fouling in Hydroformylation Processes by Water Addition
    Publication number: 20130261344
    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: Application
    Filed: November 3, 2011
    Publication date: October 3, 2013
    Inventors: Glenn A. Miller, Michael A. Brammer, Donald L. Campbell, JR., Thomas C. Eisenschmid, Adrian Lord, Jens Rudolph, Hans-Rüdiger Reech, Hans-Günter Thelen, Maximilian Walter