Patents by Inventor Ringnerus P. van der Werf

Ringnerus P. van der Werf 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).

  • Apparatus for separating hydrocarbon products from catalyst particles
    Patent number: 4664889
    Abstract: In a fluidized catalytic cracking apparatus a mixture of hydrocarbon products and hydrocarbon catalyst particles is removed from a reactor riser (1) and introduced into a cyclone separator (2), wherein in order to strip the catalyst particles, primary steam is injected into the cyclone separator (2), and wherein, for additional stripping the catalyst particles are introduced into a stripper assembly (3) comprising at least two interconnected stripper vessels (4, 5) into which secondary steam is introduced.
    Type: Grant
    Filed: November 8, 1985
    Date of Patent: May 12, 1987
    Assignee: Shell Oil Company
    Inventors: Wiecher D. E. Steenge, Ringnerus P. van der Werf, Jan Haringa
  • Process for the preparation of a hydrocarbon mixture
    Patent number: 4249031
    Abstract: Method for the production of hydrocarbon comprises contacting as feed low molecular weight oxygenated organic compounds with a zinc halide in the presence of certain high-boiling, low vapor pressure compounds having good solvency for the zinc halide.
    Type: Grant
    Filed: March 25, 1980
    Date of Patent: February 3, 1981
    Assignee: Shell Oil Company
    Inventors: Eit Drent, Ringnerus P. van der Werf