US 11,865,505 B2
Aqueous methods for titanating a chromium/silica catalyst
Max P. McDaniel, Bartlesville, OK (US); Kathy S. Clear, 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 Jan. 31, 2022, as Appl. No. 17/588,398.
Application 17/588,398 is a division of application No. 16/293,726, filed on Mar. 6, 2019, granted, now 11,298,683.
Application 16/293,726 is a division of application No. 15/815,761, filed on Nov. 17, 2017, granted, now 10,300,460, issued on May 28, 2019.
Prior Publication US 2022/0152586 A1, May 19, 2022
Int. Cl. B01J 23/26 (2006.01); B01J 35/10 (2006.01); C08F 10/02 (2006.01); B01J 37/02 (2006.01); B01J 35/02 (2006.01); B01J 37/03 (2006.01); B01J 37/14 (2006.01); B01J 21/06 (2006.01); B01J 21/08 (2006.01); C08F 4/18 (2006.01); C08F 4/24 (2006.01); C08F 10/00 (2006.01); B01J 3/02 (2006.01); B01J 31/34 (2006.01); B01J 31/38 (2006.01); B01J 37/04 (2006.01); B01J 31/02 (2006.01)
CPC B01J 23/26 (2013.01) [B01J 21/063 (2013.01); B01J 21/08 (2013.01); B01J 35/023 (2013.01); B01J 35/1019 (2013.01); B01J 35/1023 (2013.01); B01J 35/1042 (2013.01); B01J 35/1047 (2013.01); B01J 37/0203 (2013.01); B01J 37/0207 (2013.01); B01J 37/0209 (2013.01); B01J 37/035 (2013.01); B01J 37/04 (2013.01); C08F 4/18 (2013.01); C08F 4/24 (2013.01); C08F 10/00 (2013.01); C08F 10/02 (2013.01); B01J 31/0212 (2013.01); B01J 31/0274 (2013.01); B01J 31/0275 (2013.01); B01J 31/34 (2013.01); B01J 31/38 (2013.01); B01J 2231/12 (2013.01)] 21 Claims
 
1. A process for preparing a titanium-silicon complex, the process comprising:
(1) contacting a silicon compound with water and an acid or a base in a solvent to form a first solution containing a partially-hydrolyzed silicon material, wherein a molar ratio of water to silicon is in a range from about 0.2:1 to about 0.8:1, a weight ratio of the acid or the base to the solvent is from about 1:2000 to about 1:20, and the silicon compound comprises a silicon alkoxide; and
(2) contacting a titanium compound with the first solution containing the partially-hydrolyzed silicon material at a molar ratio of titanium to silicon from about 0.3:1 to about 0.9:1 to form a second solution containing the titanium-silicon complex.