US 12,005,425 B2
Methods of preparing a catalyst with low HRVOC emissions
Max P. McDaniel, Bartlesville, OK (US); Kathy S. Clear, Bartlesville, OK (US); Eric D. Schwerdtfeger, Bartlesville, OK (US); and Jeremy M. Praetorius, Bartlesville, OK (US)
Assigned to Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed by Chevron Phillips Chemical Company LP, The Woodlands, TX (US)
Filed on Jun. 13, 2022, as Appl. No. 17/839,050.
Application 17/580,258 is a division of application No. 15/953,927, filed on Apr. 16, 2018, granted, now 11,266,976, issued on Mar. 8, 2022.
Application 17/839,050 is a continuation of application No. 17/580,258, filed on Jan. 20, 2022, granted, now 11,383,222.
Prior Publication US 2022/0305463 A1, Sep. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B01J 21/08 (2006.01); B01J 23/26 (2006.01); B01J 37/02 (2006.01); B01J 37/08 (2006.01)
CPC B01J 21/08 (2013.01) [B01J 23/26 (2013.01); B01J 37/0217 (2013.01); B01J 37/0236 (2013.01); B01J 37/024 (2013.01); B01J 37/08 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A hydrolyzed pre-catalyst composition prepared by a process comprising:
contacting (i) a dried silica support wherein the dried silica support has a loss in weight upon drying of less than about 3 wt. %; (ii) a titanium-containing compound comprising a titanium (IV) alkoxide, wherein the titanium (IV) alkoxide is titanium (IV) isopropoxide; and (iii) an aqueous alkaline solution comprising water and from about 3 wt. % to about 20 wt. % of a nitrogen-containing compound based on a total weight of the aqueous alkaline solution; and
removing the aqueous alkaline solution to form the hydrolyzed pre-catalyst composition wherein the hydrolyzed pre-catalyst composition has a carbon content that is reduced by greater than about 50% when compared to the hydrolyzed pre-catalyst composition prepared in an absence of the aqueous alkaline solution.