Patents by Inventor A. Ullmann

A. Ullmann 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).

  • Solvents for the selective removal of H.sub.2 S from gases containing both H.sub.2 S and CO.sub.2
    Patent number: 5277884
    Abstract: A novel class of solvents is described that have improved selectivity for H.sub.2 S as compared to CO.sub.2. The solvents are based on adding suitable second partially miscible solvent to known solvents. In specific, it is shown that adding 20% of dodecane to NMP (normal methyl pyrolidinone) increases the selectivity of the solvent for H.sub.2 S as compared to CO.sub.2 by 50%. This leads to important process improvements and reduction in the cost of the removal process.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: January 11, 1994
    Inventors: Reuel Shinnar, A. Ullmann, Zvi Ludmer