Patents by Inventor Cornelius Ouwehand

Cornelius Ouwehand 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).

  • Zeolite Y
    Patent number: 9308521
    Abstract: Process for preparing a modified zeolite Y which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700 to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from 700 to 800° C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from 800 to 850° C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from 850 to 900° C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from 900 to 950° C. and (v) the steam partial pressure is at least 0.07 bar at a temperature of from 950 to 1000° C.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: April 12, 2016
    Assignee: PQ CORPORATION
    Inventors: David Allen Cooper, Cornelius Ouwehand, Laszlo Domokos, Lay Hwa Ong
  • ZEOLITE Y
    Publication number: 20140135560
    Abstract: Process for preparing a modified zeolite Y which process comprises subjecting zeolite Y having a silica to alumina molar ratio of at least 10 to calcination at a temperature of from 700 to 1000° C. wherein (i) the steam partial pressure is at most 0.06 bar at a temperature of from 700 to 800° C., (ii) the steam partial pressure is at most 0.08 bar at a temperature of from 800 to 850° C., (iii) the steam partial pressure is at least 0.03 bar at a temperature of from 850 to 900° C., and (iv) the steam partial pressure is at least 0.05 bar at a temperature of from 900 to 950° C. and (v) the steam partial pressure is at least 0.07 bar at a temperature of from 950 to 1000° C.
    Type: Application
    Filed: January 16, 2014
    Publication date: May 15, 2014
    Applicant: PQ CORPORATION
    Inventors: David Allen Cooper, Cornelius Ouwehand, Laszlo Domokos, Lay Hwa Ong