US 12,453,961 B2
Chromium catalyst, its preparation and use
Weiqing Joe Zou, Twinsburgh, OH (US); David James Brockway, Mentor, OH (US); Peter Pfab, Neustadt (DE); and Matthias Georg Schwab, Mannheim (DE)
Assigned to BASF Corporation, Florham Park, NJ (US)
Filed by BASF Corporation, Florham Park, NJ (US)
Filed on Jun. 14, 2022, as Appl. No. 17/839,906.
Application 17/839,906 is a division of application No. 16/302,577, granted, now 11,389,786, previously published as PCT/US2017/033803, filed on May 22, 2017.
Claims priority of provisional application 62/340,134, filed on May 23, 2016.
Prior Publication US 2022/0314203 A1, Oct. 6, 2022
Int. Cl. B01J 23/26 (2006.01); B01J 35/31 (2024.01); B01J 35/32 (2024.01); B01J 35/61 (2024.01); B01J 35/63 (2024.01); B01J 35/80 (2024.01); B01J 37/02 (2006.01); B01J 37/03 (2006.01); B01J 37/16 (2006.01)
CPC B01J 23/26 (2013.01) [B01J 35/31 (2024.01); B01J 35/32 (2024.01); B01J 35/615 (2024.01); B01J 35/633 (2024.01); B01J 35/635 (2024.01); B01J 35/638 (2024.01); B01J 35/80 (2024.01); B01J 37/0236 (2013.01); B01J 37/031 (2013.01); B01J 37/035 (2013.01); B01J 37/16 (2013.01); B01J 2235/15 (2024.01)] 19 Claims
OG exemplary drawing
 
1. A process for preparing a chromium oxide catalyst composition, the process comprising:
forming a mixture comprising chromium(VI) oxide in an aqueous solvent and in an organic reducing solvent;
refluxing the mixture to form a slurry; and
drying the slurry to form a powder having chromium(VI) oxide at an amount of about 10,000 ppm or less based on total chromium oxides content in the powder.