REJUVENATING SAPO MOLECULAR SIEVE WITH ANHYDROUS LIQUID OR VAPOR

摘要

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 10THE REJUVENATED MOLECULAR SIEVE OR CATALYST CAN BE USED TO MAKE AN OLEFIN PRODUCT FROM AN OXEGENATE- CONTAINING FEEDSTOCK. THE PREFERRED MOLECULAR SIEVES SILICOALUMINOPHOSPHATE (SAPO) AND / OR ALUMINOPHOSPHATE MOLECULAR SIEVES.