Patents by Inventor Hans-J. Fritzsche

Hans-J. Fritzsche 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).

  • Patent number: 5085675
    Abstract: A scrubbing solution boiling above 100.degree. C. under atmospheric pressure is used for removing H.sub.2 S and CO.sub.2 from a gas stream at a temperature from 5.degree. to 70.degree. C. The solution is thus laden with at least CO.sub.2 and H.sub.2 S. For regeneration, the laden scrubbing solution under a pressure of at least 2 bars and at a temperature of at least 60.degree. C. is supplied to an expansion zone and is expanded therein. A flashed-off gas which is rich in H.sub.2 S is withdrawn from the expansion zone. The scrubbing solution from the expansion zone is subjected to a hot regeneration, by which the scrubbing solution at a temperature below its boiling temperature is stripped with an inert gas so that its residual loading is substantially removed. Mixed gases which contain inert gas are withdrawn from the hot regeneration and are contacted with scrubbing solution.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: February 4, 1992
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Manfred Kriebel, Gerhard Grunewald, Hans-J. Fritzsche