Patents by Inventor Inge Konig

Inge Konig 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).

  • Process for obtaining pure 2-(perfluoroalkyl)-ethanols from their mixtures with 2-(perfluoroalkyl)-ethylenes and possibly 2-(perfluoroalkyl)-ethyl esters
    Patent number: 4219680
    Abstract: 2-(perfluoroalkyl)-ethanols of the formula R.sub.f CH.sub.2 CH.sub.2 OH are obtained from 2-(perfluoroalkyl)-ethyl iodides of the formula R.sub.f CH.sub.2 CH.sub.2 I as a mixture with 2-(perfluoroalkyl)-ethylenes of the formula R.sub.f CH.dbd.CH.sub.2 and possibly also with 2-(perfluoroalkyl)-ethylcarboxylic acid esters of the formula R.sub.f CH.sub.2 CH.sub.2 OCOR. From these mixtures, the 2-(perfluoroalkyl)-ethanols are obtained with a high purity degree when adding during the distillation separation as entrainer an alkanol having from 1 to 8 carbon atoms or a monoalkyl ether of ethyleneglycol the alkyl radical of which contains 1 to 4 carbon atoms, or a mixture of such alkanols and/or alkylglycols, and in the presence of 2-(perfluoroalkyl)-ethylcarboxylic acid esters, furthermore an acidic ester interchange catalyst.
    Type: Grant
    Filed: July 25, 1979
    Date of Patent: August 26, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Inge Konig, Horst Streitberger, Engelbert Krempl, Ulrich Schwenk
  • Process for the manufacture of 2-(perfluoroalkyl)-ethanols
    Patent number: 4219681
    Abstract: 2-(perfluoroalkyl)-ethanols of the formulaR.sub.f CH.sub.2 CH.sub.2 OHin which R.sub.f is a perfluoroalkyl radical having from 1 to 21 carbon atoms, are prepared in an advantageous manner from the corresponding 2-(perfluoroalkyl)-ethyl iodides by reaction with water and N-methyl-2-pyrrolidone, thus reducing formation of by-products.
    Type: Grant
    Filed: August 6, 1979
    Date of Patent: August 26, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ulrich Schwenk, Inge Konig, Horst Streitberger