Patents Assigned to Blacksmith Chemical Services
  • Scavenging of hydrogen sulphide
    Patent number: 5601700
    Abstract: A method for the removal of hydrogen sulphide from a hydrocarbon-water mixture. The method utilizes a sulphite or a bisulphite, preferably ammonium bisulphite. It may be added as a salt or in solution. It is used in amounts by weight of from 2:1 salt: hydrogen sulphide.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: February 11, 1997
    Assignees: William Blythe Limited, Blacksmith Chemical Services
    Inventors: Norman Bridge, Robert McGowan