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:
Jun. 27, 2017
Filed:
Oct. 14, 2013
Applicant:
Dow Global Technologies Llc, Midland, MI (US);
Inventors:
Matthew Pretz, Lake Jackson, TX (US);
Mark W. Stewart, Pearland, TX (US);
Don F. Shaw, Denville, NJ (US);
Brien A. Stears, League City, TX (US);
Madhusudhan M. Kodam, Midland, MI (US);
Ben Freireich, Midland, MI (US);
Assignee:
Dow Global Technologies LLC, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 45/16 (2006.01); B04C 3/00 (2006.01); B01J 8/00 (2006.01); B01J 8/18 (2006.01); B01J 8/34 (2006.01); B01D 45/08 (2006.01); B01D 45/12 (2006.01);
U.S. Cl.
CPC ...
B01D 45/16 (2013.01); B01D 45/08 (2013.01); B01D 45/12 (2013.01); B01J 8/0055 (2013.01); B01J 8/1809 (2013.01); B01J 8/1827 (2013.01); B01J 8/1872 (2013.01); B01J 8/34 (2013.01); B04C 3/00 (2013.01); B01J 2208/00991 (2013.01);
Abstract
An improved process and an improved apparatus for minimizing attrition of catalyst particles, especially propane dehydrogenation catalyst particles, entrained in a combined flow of such particles and an entraining gas in a catalyst recovery means during separation of such particles from the entraining gas, by use of a pre-treatment step in which the combined flow is at a rate between 7.6 and 15.2 meters per second are provided.