Method for generating a purified catalyst

Patent metadata

Field	Value
Publication number	US-9687831-B2
Application number	US-201414767421-A
Country	US
Kind code	B2
Filing date	Mar 10, 2014
Priority date	Mar 13, 2013
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

Methods for generating a purified catalyst are provided. The method includes performing a reaction in a reaction vessel to generate a liquid catalyst and reaction products, purging the reaction products using an inert gas to form a purged catalyst, freezing the purged catalyst in the reaction vessel, and applying a vacuum to the reaction vessel while the purged catalyst thaws, wherein the vacuum removes residual reaction products to form a purified catalyst. Systems for generating a purified catalyst and a purified catalyst are also provided.

First claim

What is claimed is:

1. A method for generating a purified catalyst, comprising:
performing a reaction in a reaction vessel to generate a liquid catalyst and reaction products;
purging the reaction products using an inert gas to form a purged catalyst;
freezing the purged catalyst in the reaction vessel; and
applying a vacuum to the reaction vessel while the purged catalyst thaws, wherein the vacuum removes residual reaction products to form a purified catalyst.

2. The method of claim 1 , wherein freezing the purged catalyst comprises supplying a coolant to rods within the reaction vessel.

3. The method of claim 2 , wherein the coolant is dry ice, ice-water, water, liquid nitrogen, or a combination comprising at least one of the foregoing.

4. The method of claim 1 , wherein the vacuum is applied proximate to the top of the reaction vessel.

5. The method of claim 1 , wherein the vacuum is applied until the purged catalyst is liquefied.

6. The method of claim 1 , wherein the reaction products comprise hydrogen chloride.

7. The method of claim 1 , wherein the reaction comprises ZrCl 4 +4C 3 H 7 COOH→Zr(OOCC 3 H 7 ) 4 +4HCl.

8. The method of claim 1 , wherein the reaction comprises TiCl 4 +4C 4 H 9 OH→Ti(OC4H 9 ) 4 +4HCl.

9. The method of claim 1 , wherein the inert gas comprises nitrogen.

10. The method of claim 1 , further comprising bubbling a second inert gas through the purified catalyst.

11. The method of claim 10 , wherein the inert gas and the second inert gas are the same or wherein the inert gas and the second inert gas are different.

12. The method of claim 11 , wherein the second inert gas comprises nitrogen.

13. The method of claim 1 , further comprising applying sonication to reaction vessel.

14. The method of claim 1 , wherein the purified catalyst comprises less than about 2000 ppm of the reaction products.

Assignees

• Saudi Basic Ind Corp

Inventors

• Azam Shahid
• Schmidt Roland
• Al-Hazmi Mohammed

Classifications

• B01J2219/00076

  with heat exchange elements inside the reactor · CPC title

• B01J2219/00081

  Tubes · CPC title

• B01J31/0212 Primary

  Alkoxylates · CPC title

• B01J2219/00083

  Coils · CPC title

• B01J19/24

  Stationary reactors without moving elements inside (B01J19/08, B01J19/26 take precedence; with stationary particles B01J8/02) · CPC title