Patents by Inventor Mitchell D. Refvik

Mitchell D. Refvik 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).

  • Process to isomerize 1-butene to 2-butene
    Publication number: 20040106836
    Abstract: A process is provided to produce a 2-alkene product from a 1-alkene-containing feed stream. The process comprises contacting the 1-alkene-containing feed stream in a reactor zone to isomerize the 1-alkene-containing feed stream to produce the 2-alkene product. More specifically, a process is provided to produce a 2-butene product from a 1-butene containing feed stream.
    Type: Application
    Filed: May 28, 2002
    Publication date: June 3, 2004
    Inventors: Dan M. Hasenberg, Mitchell D. Refvik, Michael S. Matson
  • Process to prepare low carbon disulfide containing dimethyl sulfide
    Patent number: 6736879
    Abstract: An adsorption method is disclosed for removal of acid gas from a sulfur compound stream. The method relates to a novel process to remove acid gas from a sulfur compound stream by adsorption on an adsorption media adsorbent followed by regeneration of the adsorption media after the adsorption capacity has been reached. The adsorption media comprises an activated alumina, which has been previously treated with one or more alkali metal compounds, one or more alkaline earth metal compounds, or a mixture thereof; and then regenerating the adsorbent after the adsorption capacity has been reached.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: May 18, 2004
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Dan M. Hasenberg, Stan A. Zisman, Mitchell D. Refvik
  • PROCESS TO PREPARE LOW CARBON DISULFIDE CONTAINING DIMETHYL SULFIDE
    Publication number: 20030205134
    Abstract: An adsorption method is disclosed for removal of acid gas from a sulfur compound stream. The method relates to a novel process to remove acid gas from a sulfur compound stream by adsorption on an adsorption media adsorbent followed by regeneration of the adsorption media after the adsorption capacity has been reached. The adsorption media comprises an activated alumina, which has been previously treated with one or more alkali metal compounds, one or more alkaline earth metal compounds, or a mixture thereof; and then regenerating the adsorbent after the adsorption capacity has been reached.
    Type: Application
    Filed: May 1, 2002
    Publication date: November 6, 2003
    Inventors: Dan M. Hasenberg, Stan A. Zisman, Mitchell D. Refvik
  • Detergent additive composition and processes therefore and therewith
    Patent number: 6620776
    Abstract: A novel composition having the formula: wherein R1 is selected from the group consisting of an alkyl group containing from 1 to 20 carbon atoms and an aryl group, and R2 is selected from the group consisting of an alkyl group containing from 1 to 20 carbon atoms and an aryl group. The composition is made by combining an amine compound, a carbonyl compound, a solvent, and a sulfur-containing compound. The composition is used as a detergent additive in cleaning process.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: September 16, 2003
    Assignee: Phillips Petroleum Company
    Inventors: Mitchell D. Refvik, David W. Dockter
  • Detergent additive composition and processes therefore and therewith
    Patent number: 6506721
    Abstract: A novel composition having the formula: wherein R1 is selected from the group consisting of an alkyl group containing from 1 to 20 carbon atoms and an aryl group, and R2 is selected from the group consisting of an alkyl group containing from 1 to 20 carbon atoms and an aryl group. The composition is made by combining an amine compound, a carbonyl compound, a solvent, and a sulfur-containing compound. The composition is used as a detergent additive in cleaning process.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: January 14, 2003
    Assignee: Phillips Petroleum Company
    Inventors: Mitchell D. Refvik, David W. Dockter
  • Detergent additive composition and processes therefore and therewith
    Publication number: 20020155980
    Abstract: A novel composition having the formula: 1
    Type: Application
    Filed: June 19, 2002
    Publication date: October 24, 2002
    Applicant: Phillips Petroleum Company
    Inventors: Mitchell D. Refvik, David W. Dockter
  • Oxidation of mercaptans to organic disulfides
    Patent number: 6294699
    Abstract: A process useful for producing an organic disulfide is disclosed. The process can include contacting mercaptans with a solid catalyst selected from the group consisting of a Group IIA metal oxide; 2) an alumina material consisting essentially of alumina; 3) an impregnated alumina impregnated with a metal selected from the group consisting of cobalt, molybdenum, tungsten, nickel and combinations of any two or more thereof; 4) an acidic ion-exchange resin; 5) a basic ion-exchange resin; and 6) combinations of any two or more thereof; in the presence of sulfur dioxide and in the substantial absence of a liquid oxidation catalyst to thereby produce organic disulfides.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: September 25, 2001
    Assignee: Richmond, Hitchcock, Fish & Dollar
    Inventors: Mitchell D. Refvik, James Edward Shaw