REJUVENATING SAPO AND/OR ALPO MOLECULAR SIEVE WITH ANHYDROUS LIQUID OR VAPOR

Title:

REJUVENATING SAPO AND/OR ALPO MOLECULAR SIEVE WITH ANHYDROUS LIQUID OR VAPOR

Document Type and Number:

WIPO Patent Application WO2001080995

Kind Code:

A3

Abstract:

Disclosed is a method of rejuvenating a molecular sieve. The method includes contacting a molecular sieve having a methanol uptake of less than 1, or a catalyst containing molecular sieve having a methanol up of less than 1, with anhydrous liquid or vapor until the methanol uptake ratio is increased by at least 10 %. The rejuvenated molecular sieve or catalyst can be used to make an olefin product from an oxygenate-containing feedstock. The preferred molecular sieves silicoaluminophosphate (SAPO) and/or aluminophosphate molecular sieves.

Inventors:

JANSSEN MARCEL J G (BE)
VAN OORSCHOT CORNELIUS W M (BE)
CLEM KENNETH R (US)

Application Number:

PCT/US2001/013306

Publication Date:

February 21, 2002

Filing Date:

April 26, 2001

Export Citation:

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Assignee:

EXXONMOBIL CHEM PATENTS INC (US)
JANSSEN MARCEL J G (BE)
OORSCHOT CORNELIUS W M VAN (BE)
CLEM KENNETH R (US)

International Classes:

B01J29/85; B01J29/90; B01J38/50; B01J38/52; C07C1/20; (IPC1-7): B01J29/04; B01J29/90; B01J38/50; B01J38/52; C07C1/20

Domestic Patent References:

WO1993010065A1

1993-05-27

Foreign References:

US5932512A	1999-08-03
US5912393A	1999-06-15

Other References: