Rejuvenating SAPO molecular sieve with anhydrous liquid or vapor

The invention is directed to a method of rejuvenating silicoaluminophosphate (SAPO) molecular sieve catalyst, and a method of using the rejuvenated catalyst to make an olefin product from methanol feed. In particular, the invention is directed to rejuvenating the sieve by contacting the molecular si...

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Main Authors Janssen, Marcel J. G, Van Oorschot, Cornelius W. M, Clem, Kenneth R
Format Patent
LanguageEnglish
Published 24.12.2002
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Abstract The invention is directed to a method of rejuvenating silicoaluminophosphate (SAPO) molecular sieve catalyst, and a method of using the rejuvenated catalyst to make an olefin product from methanol feed. In particular, the invention is directed to rejuvenating the sieve by contacting the molecular sieve with anhydrous, polar liquid or vapor until a desired methanol uptake index is achieved. This invention is to a method of rejuvenating a molecular sieve. The method includes contacting a molecular sieve having a methanol uptake index of less than 1, or a catalyst containing molecular sieve having a methanol uptake index of less than 1, with anhydrous liquid or vapor until the methanol uptake index 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 sieve is a silicoaluminophosphate (SAPO) molecular sieve.
AbstractList The invention is directed to a method of rejuvenating silicoaluminophosphate (SAPO) molecular sieve catalyst, and a method of using the rejuvenated catalyst to make an olefin product from methanol feed. In particular, the invention is directed to rejuvenating the sieve by contacting the molecular sieve with anhydrous, polar liquid or vapor until a desired methanol uptake index is achieved. This invention is to a method of rejuvenating a molecular sieve. The method includes contacting a molecular sieve having a methanol uptake index of less than 1, or a catalyst containing molecular sieve having a methanol uptake index of less than 1, with anhydrous liquid or vapor until the methanol uptake index 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 sieve is a silicoaluminophosphate (SAPO) molecular sieve.
Author Clem, Kenneth R
Van Oorschot, Cornelius W. M
Janssen, Marcel J. G
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References Barger (5248647) 19930900
Mulvaney, III et al. (5744680) 19980400
Pellet et al. (4842714) 19890600
Hsiang-ning Sun (5932512) 19990800
Yon et al. (5177298) 19930100
Barger et al. (5912393) 19990600
Janssen et al. (2001/0020119) 20010900
Degnan et al. (5185310) 19930200
Edwards et al. (4681864) 19870700
(WO 93/10065) 19930500
Kiser (4319057) 19820300
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