IP Library › Granted Patent US 12,304,824
Granted Patent B2
US 12,304,824 · App. 17/570,092 · Granted May 20, 2025

Methods of synthesis of mesoporous nano-sized beta zeolites by desilication and uses thereof

Inventors: Lianhui Ding (Dhahran Camp, SA); Sameer Al-Ghamdi (Dhahran, SA)
Assignee: Saudi Arabian Oil Company
C01B39/46C10G47/02B82Y30/00B82Y40/00C01P2004/64C01P2006/16
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Quick Facts
Patent No.
US 12,304,824
App. No.
17/570,092
Granted
May 20, 2025
Kind
B2
Abstract

A nano-sized mesoporous zeolite beta composition and processes for the synthesis and use of the nano-sized mesoporous zeolite beta. The nano-sized mesoporous zeolite beta is synthesized using desilication without the addition of a structure directing agent (SDA). A process for hydrocracking a hydrocarbon feedstock using the nano-sized mesoporous zeolite beta is also provided.

Claims (18)

1. A method for synthesizing a nano-sized mesoporous zeolite beta composition, comprising:

mixing silica, a source of aluminum, tetraethylammonium hydroxide, and water to form an aluminosilicate fluid gel;

heating the aluminosilicate fluid gel at a first temperature for a first time period to form a zeolite beta product;

mixing the zeolite beta product with aqueous ammonia to form an ammonia-zeolite mixture without a structure directing agent (SDA), wherein the mass ratio of ammonia to silica is 10;1 to 20:1;

heating the ammonia-zeolite mixture at a second temperature for a second time period to form a treated zeolite beta product, wherein the second temperature is in the range of 50° C. to 200° C. and the second time period is 5 to 10 hours;

filtering the treated zeolite beta product;

washing the treated zeolite beta product after the filtering;

drying the treated zeolite beta at a third temperature for a third time period after the washing; and

calcinating the treated zeolite beta product at a fourth temperature for a fourth time period after the drying to produce the nano-sized mesoporous zeolite beta composition, wherein the nano-sized mesoporous zeolite beta composition has a relative crystallinity of 90% to 120% and a pore volume of 1.2 milliliters per gram (ml/g) to 1.5 ml/g.

2. The method of claim 1 , wherein the nano-sized mesoporous zeolite beta composition has a pore size of 15 nanometers (nm) to 50 nm.

3. The method of claim 1 , wherein the nano-sized mesoporous zeolite beta composition has a particle size of 10 nanometers (nm) to 100 nm.

4. The method of claim 1 , wherein the silica comprises fumed silica.

5. The method of claim 1 , wherein the source of aluminum is aluminum oxide.

6. The method of claim 1 , wherein the first temperature is in the range of 100° C. to 150° C. and the first time period is in the range of 2 days to 7 days.

7. The method of claim 1 , wherein the second temperature is in the range of 50° C. to 200° C. and the second time period is in the range of 5 hours to 48 hours.

8. The method of claim 1 , wherein the third temperature is in the range of 80° C. to 150° C., and the third time period is in the range of 3 hours to 8 hours.

9. The method of claim 1 , wherein the fourth temperature is in the range of 500° C. to 600° C., and the fourth time period is in the range of 3 hours to 8 hours.

10. The method of claim 1 , comprising stirring the ammonia-zeolite mixture for a time period of 0.5 hours to 4 hours.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2022
From: DING, LIANHUI; AL-GHAMDI, SAMEER
To: SAUDI ARABIAN OIL COMPANY
Reel/Frame 058592/0314 →
Continuity (1)
Related Publication 20230212019A1 · Jul 6, 2023
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