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. 20, 2024
Filed:
Jul. 03, 2019
Applicant:
Dow Global Technologies Llc, Midland, MI (US);
Inventors:
Paul A. Gillis, Lake Jackson, TX (US);
Quan Yuan, Sugarland, TX (US);
Assignee:
Dow Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01F 25/314 (2022.01); B01F 25/433 (2022.01); B01J 19/24 (2006.01); B01J 19/26 (2006.01); C07C 263/10 (2006.01);
U.S. Cl.
CPC ...
B01F 25/3141 (2022.01); B01F 25/31423 (2022.01); B01F 25/4336 (2022.01); B01J 19/2405 (2013.01); B01J 19/26 (2013.01); C07C 263/10 (2013.01);
Abstract
Phosgene is mixed with an organic polyamine to produce polyisocyanate compounds. A phosgene flow is established in a conduit (), and the organic polyamine is injected into the phosgene flow. A constricted region () of the conduit () resides downstream of the point of the polyamine injection. The presence of the constricted region () reduces by-product formation.