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:
Feb. 25, 2020
Filed:
May. 17, 2019
Applicant:
Nextleaf Solutions Ltd., Coquitlam, CA;
Inventors:
Krupal Devendra Pal, Burnaby, CA;
Ryan Delmoral Ko, Coquitlam, CA;
Brock Aston Hughes, Port Coquitlam, CA;
Ivan Jason Casselman, Vancouver, CA;
Assignee:
Nextleaf Solutions Ltd., Vancouver, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/14 (2006.01); C07D 311/82 (2006.01); B01D 5/00 (2006.01); B01D 3/10 (2006.01); B01D 1/22 (2006.01); B01D 11/04 (2006.01);
U.S. Cl.
CPC ...
B01D 3/148 (2013.01); B01D 1/222 (2013.01); B01D 3/10 (2013.01); B01D 5/0063 (2013.01); B01D 11/0492 (2013.01); C07D 311/82 (2013.01);
Abstract
A process for producing THC-O-acetate using a succession of distillation, salting-out assisted liquid-liquid extractions (SALLEs), and solvent recovery techniques. Tetrahydrocannabinol (THC) in cannabis oil reacts with acetic anhydride under reflux to produce THC-O-acetate and acetic acid. The resulting crude product is distilled and subjected to a SALLE with hexane followed by a SALLE with petroleum ether, before being distilled again in order to obtain a refined, THC-O-acetate product.