Patents by Inventor Werner Siemanowsky

Werner Siemanowsky 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 the preparation of polyglycerols
    Patent number: 4973763
    Abstract: A process for preparation of polyglycerol is provided, comprising the steps of (a) reacting glycerol or diglycerol with hydrogen chloride at between about 340.degree. K. and about 410.degree. K. to yield a mixture that comprises an .alpha.-monochlorohydrin of glycerol or an .alpha.-monochlorohydrin of diglycerol, (b) mixing the .alpha.-monochlorohydrins and an alkali metal glycerolate or an alkali metal diglycerolate at a temperature of between about 320.degree. K. and 410.degree. K. to yield a mixture of alkali metal chloride and glycerol and/or diglycerol and polyglyerol, (c) separating the alkali metal chloride from the glycerols and (d) separating the polyglycerol from glycerol and/or diglycerol.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: November 27, 1990
    Assignee: Deutsche Solvay-Werke GmbH
    Inventors: Gerald Jakobson, Horst Linke, Werner Siemanowsky