Patents by Inventor Gerhard Rasner

Gerhard Rasner 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).

  • Method of removing phenol from waste water
    Patent number: 3963610
    Abstract: Phenol is removed from waste waters that occur in the manufacture of phenol by the cumene process wherein cumene is used as an extractant. The cumene which is used for extracting the phenol from the waste water and which is thereafter washed with sodium hydroxide to remove the phenol is treated prior to this washing with an aqueous solution of 1 to 20 wt-% preferably 5 to 10 wt-% sodium carbonate. If desired the aqueous solution can also contain sodium sulphate in amounts of 1 to 15% by weight. The sodium carbonate solution may also contain a non-ionogenic, surface-active substance such as aryl polyglycol ethers in amounts of from 0.001 to 1% by weight.
    Type: Grant
    Filed: October 1, 1973
    Date of Patent: June 15, 1976
    Assignee: Phenolchemie GmbH
    Inventors: Bruno Hauschulz, Heinrich VON Barneveld, Wilfried Jordan, Josef Mertmann, Gerhard Rasner, Harri Brenienek