The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2022
Filed:
Sep. 10, 2019
Shell Oil Company, Houston, TX (US);
Dionysius Jacobus Maria De Vlieger, Amsterdam, NL;
Pieter Huizenga, Amsterdam, NL;
Munro Mackay, Amsterdam, NL;
Lucas Petrus Simon Keyzer, Amsterdam, NL;
Duraisamy Muthusamy, Houston, TX (US);
SHELL USA, INC., Houston, TX (US);
Abstract
The invention provides a start-up method for a process for the preparation of glycols from a starting material comprising one or more saccharides in the presence of hydrogen and a catalyst system comprising one or more retro-aldol catalysts comprising tungsten and one or more catalytic species suitable for hydrogenation in a reactor, said method comprising introducing the one or more retro-aldol catalysts to the reactor whilst also in the presence of one or more agents suitable to suppress tungsten precipitation.