Patents by Inventor Albert M. Stock

Albert M. Stock 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).

  • Refining tetrahydrofuran
    Patent number: 4348262
    Abstract: In the refining of crude acidic tetrahydrofuran prepared from acetylene and formaldehyde, corrosion of refining equipment and formation of color-producing methacrolein can be minimized by bringing the pH value of the crude tetrahydrofuran to within the range 5-11 before the refining step.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: September 7, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Albert M. Stock, Wilson S. Tse
  • Process for the control of pH in the ethynylation of formaldehyde
    Patent number: 4294997
    Abstract: In the ethynylation of formaldehyde in the presence of a copper acetylide catalyst to produce butynediol, pH is controlled by the incremental or continuous addition of an alkali metal hydroxide and an alkali metal carbonate at an equivalent ratio of hydroxide ion to carbonate ion of 1:1-4:1.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Albert M. Stock, James D. Verbsky
  • Method of inhibiting cuprene formation in ethynylation reaction
    Patent number: 4149004
    Abstract: When acetylene flow to the continuous, aqueous ethynylation reaction of formaldehyde and acetylene, using a copper acetylide complex as the catalyst, is interrupted, resulting cuprene formation can be inhibited by maintaining the reaction mass at a pH of 3.5-5 until normal acetylene flow is resumed.
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: April 10, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Albert M. Stock