Patents by Inventor Ewald Watermeyer DeWet

Ewald Watermeyer DeWet 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).

  • Patent number: 7294253
    Abstract: This invention relates to process for producing middle distillates having good cold flow properties, such as the Cold Filter Plugging Point (CFPP) measured in accordance with the IP method 309, and a high Cetane number, as well as to a process for production of such distillates. More particularly, this invention relates to a process in which middle distillates are produced from a mainly paraffinic synthetic crude which is produced by the reaction of CO and H2, typically by the Fischer-Tropsch (FT) process. The middle distillates produced by the process of the invention are predominantly isoparaffinic, the isoparaffins being methyl, ethyl and/or propyl branched.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: November 13, 2007
    Assignee: Sasol Technology (Pty) Ltd.
    Inventors: Robert DeHaan, Luis Pablo Dancuart, Mark Jan Prins, Ewald Watermeyer DeWet
  • Patent number: 7252754
    Abstract: This invention relates to a process for production of middle distillates having biodegradability properties. More particularly, this invention relates to a process for production of middle distillates produced from a mainly paraffinic synthetic crude which is produced by the reaction of CO and H2, typically by the Fischer-Tropsch (FT) process. The middle distillate produced according to the process of the invention may be a diesel fuel, having an aromatics content of less than 9%, as determined by the ASTM D 5186 or IP 391 test method. The paraffinic chains of the middle distillate may be predominantly isoparaffins.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: August 7, 2007
    Assignee: Sasol Technology (Pty) Ltd.
    Inventors: Robert DeHaan, Luis Pablo Dancuart, Mark Jan Prins, Ewald Watermeyer DeWet
  • Patent number: 7217852
    Abstract: This invention relates to middle distillates having good cold flow properties, such as the Cold Filter Plugging Point (CFPP) measured in accordance with the IP method (309), and a high Cetane number, as well as to a process for production of such distillates. More particularly, this invention relates to middle distillates produced from a mainly paraffinic synthetic crude which is produced by the reaction of CO and H2, typically by the Fischer-Tropsch (FT) process. The middle distillates of the invention are predominantly isoparaffinic, the isoparaffins being methyl, ethyl and/or propyl branched. The invention also provides a diesel fuel composition including the middle distillates in accordance with the invention. A process for preparing the middle distillates is also included in the invention.
    Type: Grant
    Filed: September 17, 1999
    Date of Patent: May 15, 2007
    Assignee: Sasol Technology (PTY) Ltd.
    Inventors: Robert DeHaan, Luis Pablo Dancuart, Mark Jan Prins, Ewald Watermeyer DeWet
  • Publication number: 20040173502
    Abstract: This invention relates to a process for production of middle distillates having biodegradability properties. More particularly, this invention relates to a process for production of middle distillates produced from a mainly paraffinic synthetic crude which is produced by the reaction of CO and H2, typically by the Fischer-Tropsch (FT) process. The middle distillate produced according to the process of the invention may be a diesel fuel, having an aromatics content of less than 9%, as determined by the ASTM D 5186 or IP 391 test method. The paraffinic chains of the middle distillate may be predominantly isoparaffins.
    Type: Application
    Filed: March 24, 2004
    Publication date: September 9, 2004
    Applicant: Sasol Technology (PTY) Ltd.
    Inventors: Robert DeHaan, Luis Pablo Dancuart, Mark Jan Prins, Ewald Watermeyer DeWet
  • Publication number: 20040106690
    Abstract: This invention relates to process for producing middle distillates having good cold flow properties, such as the Cold Filter Plugging Point (CFPP) measured in accordance with the IP method 309, and a high Cetane number, as well as to a process for production of such distillates. More particularly, this invention relates to a process in which middle distillates are produced from a mainly paraffinic synthetic crude which is produced by the reaction of CO and H2, typically by the Fischer-Tropsch (FT) process. The middle distillates produced by the process of the invention are predominantly isoparaffinic, the isoparaffins being methyl, ethyl and/or propyl branched.
    Type: Application
    Filed: November 12, 2003
    Publication date: June 3, 2004
    Applicant: Sasol Technology (PTY) Ltd.
    Inventors: Robert DeHaan, Luis Pablo Dancuart, Mark Jan Prins, Ewald Watermeyer DeWet