Patents by Inventor Soren Abrahamsson

Soren Abrahamsson 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).

  • Phosgenation method
    Patent number: 5693853
    Abstract: A method of phosgenation while using carbonyl chloride produced from chlorine and contaminated carbon monoxide. The obtained contaminated carbonyl chloride is purified prior to being delivered to the phosgenation process. The carbonyl chloride is purified by absorption in a solvent and the obtained carbonyl chloride solution is used for the phosgenation reaction. The carbonyl chloride is conveniently purified in an absorption column which is also used to recover carbonyl chloride from waste gases deriving from the phosgenation process, wherein the solution of fresh and recovered carbonyl chloride is delivered commonly to the phosgenation process.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: December 2, 1997
    Assignee: Chematur Engineering AB
    Inventor: Soren Abrahamsson