	US 11,857,953 B1
	Methods of making boronated zeolites and processes for cracking butene-containing streams
Hashim N. Al Khunaizi, Qatif (SA); Ahmad A. Jazzar, Riyadh (SA); Shatha A. Alabbad, Dammam (SA); Donya A. Sewdan, Dammam (SA); and Qasim Saleem, Khobar (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Oct. 31, 2022, as Appl. No. 18/051,280.
Int. Cl. C01B 39/12 (2006.01); B01J 29/40 (2006.01); B01J 37/08 (2006.01); B01J 37/00 (2006.01); C10G 11/05 (2006.01); C01B 39/06 (2006.01); C01B 39/38 (2006.01); B01J 29/86 (2006.01); C01B 39/02 (2006.01); B01J 37/06 (2006.01)

CPC B01J 29/40 (2013.01) [B01J 29/86 (2013.01); B01J 37/0045 (2013.01); B01J 37/06 (2013.01); B01J 37/08 (2013.01); C01B 39/02 (2013.01); C01B 39/06 (2013.01); C01B 39/12 (2013.01); C01B 39/38 (2013.01); C10G 11/05 (2013.01); B01J 2229/16 (2013.01); B01J 2229/37 (2013.01); B01J 2229/38 (2013.01); B01J 2229/40 (2013.01); C10G 2400/20 (2013.01)]

12 Claims

1. A method of making a boronated zeolite catalyst, the method comprising:

preparing an initial slurry comprising water, a shape selective zeolite, boric acid, and a weak acid selected from the group consisting of oxalic acid, citric acid, and oxalic acid and citric acid, where the initial slurry has an initial pH of from 1 to 5;

hydrothermally treating the initial slurry at a temperature of from 70° C. to 90° C. to produce a hydrothermally treated slurry comprising dealuminated zeolite particles;

adjusting the pH of the hydrothermally treated slurry to an intermediate pH of from 8 to 9 to produce a basic slurry;

after adjusting the pH to the intermediate pH, hydrothermally treating the basic slurry at a temperature of from 70° C. to 90° C. to produce a boronated zeolite slurry;

removing liquids from the boronated zeolite slurry to produce a boronated zeolite filtrate; and

drying and calcining the boronated zeolite filtrate to produce the boronated zeolite catalyst.