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:
Aug. 05, 2025
Filed:
Nov. 16, 2020
Applicant:
Shell Usa, Inc., Houston, TX (US);
Inventors:
Johannes Leendert Willem Cornelis Den Boestert, Amsterdam, NL;
Adrianus Robert Storm, Moerdijk, NL;
Assignee:
SHELL USA, INC., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 301/32 (2006.01);
U.S. Cl.
CPC ...
C07D 301/32 (2013.01);
Abstract
The invention relates to a process for removing 5poly(propylene oxide) from propylene oxide, comprising: a) sending a stream comprising propylene oxide and poly(propylene oxide) to a filtration screen having openings with an average diameter of at most 50 μm; and b) sending the filtrate stream resulting from step a) to a membranehaving an average pore size of from 0 to 30 nm and recovering a permeate stream from the membrane as a purified propylene oxide stream.