Patents by Inventor Volker Schliephake

Volker Schliephake 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).

  • CONTINUOUS RECOVERY OF (METH)ACRYLIC ACID
    Publication number: 20010007043
    Abstract: (Meth)acrylic acid is recovered continuously from the reaction gas containing (meth)acrylic acid, low boilers, medium boilers and high boilers and originating from a catalytic gas-phase oxidation by
    Type: Application
    Filed: July 29, 1999
    Publication date: July 5, 2001
    Inventors: OTTO MACHHAMMER, SUSANNE HAUPT, VOLKER SCHLIEPHAKE, JURGEN SCHRODER
  • Separation by rectification of unsaturated carboxylic acids from solvents
    Patent number: 5728272
    Abstract: In a process for the separation by rectification of unsaturated carboxylic acids from solvents in which the acids were absorbed after the synthesis reaction, the rectification is briefly interrupted and the rectification column is flushed with a basic solution. The interruption is carried out at regular time intervals. The basic solution used is an aqueous solution of alkali metal and/or alkaline earth metal hydroxide, preferably NaOH, KOH, Ca(OH).sub.2 or their anhydrous oxides; alkaline polar organic solvents as amines or amides can be used, too.
    Type: Grant
    Filed: August 13, 1996
    Date of Patent: March 17, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Ulrich Hammon, Volker Schliephake, Wolfgang Pies, Ulrich Rauh