Patents Represented by Attorney John K. Roedel, Jr.

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  • Process for the preparation of alkylthioalkanoate salts
    Patent number: 4883911
    Abstract: A process for the preparation of alkylthioalkanoate salts by reaction of an alkali metal alkylmercaptide with a lactone in the presence of an aprotic polar organic solvent. Preferably, the alkali metal mercaptide is prepared by reaction of an alkylmercaptan and an alkali metal phenate.
    Type: Grant
    Filed: October 6, 1988
    Date of Patent: November 28, 1989
    Assignee: Monsanto Company
    Inventor: Dennis A. Ruest
  • Heat recovery from concentrated sulfuric acid
    Patent number: 4670242
    Abstract: A method and apparatus for the recovery of heat from a sulfuric acid process are provided. Sulfur trioxide is absorbed into hot concentrated sulfuric acid, acid having a concentration greater than 98% and less than 101% and a temperature greater than 120.degree. C., in a heat recovery tower and the heat created by the exothermic reaction is recovered in a useful form in a heat exchanger.
    Type: Grant
    Filed: November 9, 1984
    Date of Patent: June 2, 1987
    Assignee: Monsanto Company
    Inventors: Donald R. McAlister, Steven A. Ziebold
  • Heat recovery from concentrated sulfuric acid
    Patent number: 4576813
    Abstract: A method and apparatus for the recovery of heat from a sulfuric acid process are provided. Sulfuric trioxide is absorbed into hot concentrated sulfuric acid, acid having a concentration greater than 98% and less than 101% and a temperature greater than 120.degree. C., in a heat recovery tower and the heat created by the exothermic reaction is recovered in a useful form in a heat exchanger.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: March 18, 1986
    Assignee: Monsanto Company
    Inventors: Donald R. McAlister, Steven A. Ziebold