Patents Examined by V. Fee
  • Aqueous aldehyde solutions for trapping hydrogen sulfide in natural gas and crude oil producing plants
    Patent number: 5152916
    Abstract: Aqueous aldehyde solutions for trapping hydrogen sulfide comprising 5 to 50% by weight of an aldehyde and 1 to 5% by weight, relative to the aldehyde solution of a formulation comprising10 to 80% by weight of an ester of oxalkylated alkylalkylenediamines, which may be quaternized and 20 to 90% by weight of water or of a C.sub.1 -C.sub.4 -alcohol.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: October 6, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hermann Hoffmann, Frederic Mabire