Patent ID: 6989470
Filing Date: 2006-01-24
Classification: B01J,C07C,Y02P

Abstract:
1. A process for making olefins from an oxygenate feedstock comprising the steps of a) providing a microporous metalloaluminophosphate molecular sieve; b) introducing a metal hydride compound within the cages of said microporous metalloaluminophosphate molecular sieve; c) reacting said metal hydride compound with the acid groups located in the cages of the microporous metalloaluminophosphate molecular sieve, wherein the metal hydride compound is selected from the group consisting of hydrides of metals of Groups 1 and 2 of the Periodic Table, compounds of formula M 1 M 2 H 4 and mixtures thereof, M 1 being aluminum, boron, or a mixture of aluminum and boron and M 2 being a metal belonging to Group 1 of the Periodic Table; d) restoring at least a portion of the acid groups located in the cages of the microporous metalloaluminophosphate molecular sieve by submitting the microporous metalloaluminophosphate molecular sieve to a thermal treatment; e) contacting the microporous metalloaluminophosphate molecular sieve obtained at step d) with the oxygenate feedstock; and f) recovering an olefin product.