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:
Jan. 23, 2018
Filed:
Aug. 13, 2015
Applicant:
Shell Oil Company, Houston, TX (US);
Inventors:
Robert Lawrence Blackbourn, Houston, TX (US);
Paul Richard Weider, Houston, TX (US);
Dennis Shane Boriski, Houston, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C13K 1/02 (2006.01); C12P 7/10 (2006.01); C07C 309/08 (2006.01); C13K 13/00 (2006.01); D21C 1/04 (2006.01); D21C 3/04 (2006.01);
U.S. Cl.
CPC ...
C07C 309/08 (2013.01); C13K 1/02 (2013.01); C13K 13/00 (2013.01); C13K 13/002 (2013.01); D21C 1/04 (2013.01); D21C 3/04 (2013.01); C12P 2201/00 (2013.01); Y02E 50/16 (2013.01); Y02E 50/343 (2013.01);
Abstract
Since biomass is always accompanied by caustic inorganic materials, we have found that the formation of the anion salt of α-hydroxysulfonic acid represent the largest 'loss' of the α-hydroxysulfonic acid in the potential reversible acid pretreatment process. By titrating the α-hydroxysulfonic acid salt with strong mineral acid and then reverting the alfa-hydroxysulfonic acid as its primary components, the acid components can be recovered substantially quantitatively.