Patents by Inventor Gerd Saas

Gerd Saas 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 process for the preparation of alkyleneimines
    Patent number: 7683216
    Abstract: A process for the preparation of alkyleneimines by subjecting sulfuric acid monoesters of aminoalkanols to an at least two-stage reaction with aqueous bases at a temperature of at least 110° C. under pressure, relieving the pressure of the reaction mixture and distilling off the alkyleneimines from the reaction mixture after each reaction stage, wherein the conversion in the first stage is from 40 to 90% and that in the second stage is from more than 90% to 99.99%.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: March 23, 2010
    Assignee: BASF SE
    Inventors: Thomas Knebel, Gerd Saas, Wolfgang Schreieck, Horst Schroeder, Manfred Winter
  • CONTINUOUS PROCESS FOR THE PREPARATION OF ALKYLENEIMINES
    Publication number: 20080262265
    Abstract: A process for the preparation of alkyleneimines by subjecting sulfuric acid monoesters of aminoalkanols to an at least two-stage reaction with aqueous bases at a temperature of at least 110° C. under pressure, relieving the pressure of the reaction mixture and distilling off the alkyleneimines from the reaction mixture after each reaction stage, wherein the conversion in the first stage is from 40 to 90% and that in the second stage is from more than 90% to 99.99%.
    Type: Application
    Filed: April 18, 2008
    Publication date: October 23, 2008
    Applicant: BASF SE
    Inventors: Thomas Knebel, Gerd Saas, Wolfgang Schreieck, Horst Schroeder, Manfred Winter