Patents by Inventor Petrus Nicolaas Johannes Roets

Petrus Nicolaas Johannes Roets 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: 8466329
    Abstract: A method of preparing an FT derived diesel composition wherein the FT derived diesel composition has a good response to CFPP improving additives, which good response is achieved by addition of one or more of a FT recycle stream, a crude-oil derived diesel fuel, and a HGO (Heavy Gas Oil) to an FT derived diesel thereby to improve the CFPP improving additive response thereof.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: June 18, 2013
    Assignee: Sasol Technology (Pty) Ltd
    Inventors: Petrus Nicolaas Johannes Roets, Delanie Lamprecht
  • Patent number: 8183419
    Abstract: A process for the production of a synthetic low sulphur diesel fuel and a low soot emission aviation fuel is disclosed. The process includes fractionation of a Low Temperature Fischer-Tropsch feedstock into a light kerosene fraction and a heavier diesel fraction in a volumetric ratio of at least 1:2 to form the light kerosene fraction having a smoke point greater than 50 mm, a freezing point of below ?47° C., a BOCLE lubricity wear scar less than 0.85 mm, and an anti-oxidant additiveless thermal stability tube deposit rating at 260° C. of less than 1 useable as a low soot emission aviation fuel and/or an aviation fuel blend stock, and the heavier diesel fraction having CFPP according to IP309 of below ?5° C., a density@20° C. of at least 0.78 kg/l, and a viscosity@40° C. of above 2 cSt useable as a synthetic low sulphur diesel fuel and/or a diesel fuel blend stock.
    Type: Grant
    Filed: June 3, 2008
    Date of Patent: May 22, 2012
    Assignee: Sasol Technology (Pty) Limited
    Inventors: Delanie Lamprecht, Petrus Nicolaas Johannes Roets
  • Publication number: 20100179357
    Abstract: A method of preparing an FT derived diesel composition wherein the FT derived diesel composition has a good response to CFPP improving additives, which good response is achieved by addition of one or more of a FT recycle stream, a crude-oil derived diesel fuel, and a HGO (Heavy Gas Oil) to an FT derived diesel thereby to improve the CFPP improving additive response thereof.
    Type: Application
    Filed: May 31, 2007
    Publication date: July 15, 2010
    Inventors: Petrus Nicolaas Johannes Roets, Dalanie Lamprecht
  • Publication number: 20090013590
    Abstract: A process for the production of a synthetic low sulphur diesel fuel and a low soot emission aviation fuel is disclosed. The process includes fractionation of a Low Temperature Fischer-Tropsch feedstock into a light kerosene fraction and a heavier diesel fraction in a volumetric ratio of at least 1:2 to form the light kerosene fraction having a smoke point greater than 50 mm, a freezing point of below ?47° C., a BOCLE lubricity wear scar less than 0.85 mm, and an anti-oxidant additiveless thermal stability tube deposit rating at 260° C. of less than 1 useable as a low soot emission aviation fuel and/or an aviation fuel blend stock, and the heavier diesel fraction having CFPP according to IP309 of below ?5° C., a density@20° C. of at least 0.78 kg/l, and a viscosity@40° C. of above 2 cSt useable as a synthetic low sulphur diesel fuel and/or a diesel fuel blend stock.
    Type: Application
    Filed: June 3, 2008
    Publication date: January 15, 2009
    Inventors: Delanie Lamprecht, Petrus Nicolaas Johannes Roets
  • Patent number: 7390397
    Abstract: A process for the production of a synthetic low sulphur diesel fuel and a low soot emission aviation fuel is disclosed. The process includes fractionation of a Low Temperature Fischer-Tropsch feedstock into a light kerosene fraction and a heaver diesel fraction in a volumetric ratio of at least 1:2 to form the light kerosene fraction having a smoke point greater than 50 mm, a freezing point of below ?47° C., a BOCLE lubricity wear scar less than 0.85 mm, and an anti-oxidant additiveless thermal stability tube deposit rating at 260° C. of less than 1 useable as a low soot emission aviation fuel and/or an aviation fuel blend stock, and the heavier diesel fraction having CFPP according to IP309 of below ?5° C., a density@20° C. of at least 0.78 kg/l, and a viscosity@40° C. of above 2 cSt useable as a synthetic low sulphur diesel fuel and/or a diesel fuel blend stock.
    Type: Grant
    Filed: October 19, 2005
    Date of Patent: June 24, 2008
    Assignee: Sasol Technology (Pty) Ltd
    Inventors: Delanie Lamprecht, Petrus Nicolaas Johannes Roets