Patents by Inventor Nigel Wagstaff

Nigel Wagstaff 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).

  • Process for the removing poly(propylene oxide) from propylene oxide by membrane separation
    Patent number: 8304564
    Abstract: The invention relates to a process for removing poly(propylene oxide) from propylene oxide by membrane separation, wherein a membrane having an average pore size of from 0 to 5 nm is used. In said process, a liquid feed comprising propylene oxide and poly(propylene oxide) may be separated by the membrane into a permeate comprising propylene oxide and either no poly(propylene oxide) or poly(propylene oxide) at a concentration which is lower than the poly(propylene oxide) concentration in the feed, and a retentate comprising propylene oxide and poly(propylene oxide) at a concentration which is higher than the poly(propylene oxide) concentration in the feed.
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: November 6, 2012
    Assignee: Shell Oil Company
    Inventors: Johannes Gerhardus Joseph Beckers, Johannes Leendert Willem Cornelis Den Boestert, Nigel Wagstaff
  • PROCESS FOR THE REMOVING POLY(PROPYLENE OXIDE) FROM PROPYLENE OXIDE BY MEMBRANE SEPARATION
    Publication number: 20100105959
    Abstract: The invention relates to a process for removing poly(propylene oxide) from propylene oxide by membrane separation, wherein a membrane having an average pore size of from 0 to 5 nm is used. In said process, a liquid feed comprising propylene oxide and poly(propylene oxide) may be separated by the membrane into a permeate comprising propylene oxide and either no poly(propylene oxide) or poly(propylene oxide) at a concentration which is lower than the poly(propylene oxide) concentration in the feed, and a retentate comprising propylene oxide and poly(propylene oxide) at a concentration which is higher than the poly(propylene oxide) concentration in the feed.
    Type: Application
    Filed: December 18, 2007
    Publication date: April 29, 2010
    Inventors: Johannes Gerhardus Joseph Beckers, Johannes Leendert Willem Cornelis Den Boestert, Nigel Wagstaff
  • Process for the preparation of methane and/or ethane
    Patent number: 4291188
    Abstract: A process for the production of methane and ethane from a C.sub.2 -C.sub.4 paraffins hydrocarbon feed stream of higher average carbon number than the product which comprises contacting said feed with certain crystalline silicates at an elevated temperature and a pressure above 10 bar.
    Type: Grant
    Filed: March 11, 1980
    Date of Patent: September 22, 1981
    Assignee: Shell Oil Company
    Inventor: Nigel Wagstaff
  • Process for the preparation of aromatic hydrocarbons and hydrogen from butane
    Patent number: 4291182
    Abstract: A process is disclosed for the conversion of a hydrocarbon stream which is primarily C.sub.4 paraffins to aromatic hydrocarbons and hydrogen over certain crystalline silicates containing zinc.
    Type: Grant
    Filed: March 11, 1980
    Date of Patent: September 22, 1981
    Assignee: Shell Oil Company
    Inventors: Frits M. Dautzenberg, Nigel Wagstaff
  • Process for the preparation of aromatic hydrocarbons and hydrogen from propane
    Patent number: 4288645
    Abstract: A process is disclosed for the preparation of an aromatic hydrocarbon mixture and hydrogen from a light hydrocarbon stream containing at least 50% w propane using as catalyst certain crystalline silicates promoted with zinc.
    Type: Grant
    Filed: February 28, 1980
    Date of Patent: September 8, 1981
    Assignee: Shell Oil Company
    Inventor: Nigel Wagstaff