Patent ID: 7608746
Filing Date: 2009-10-27
Classification: C07C

Abstract:
1. A process for producing propylene, which comprises: mixing ethylene and methanol and/or dimethyl ether in a mole ratio range of at least 1 to at most 20 moles ethylene to the sum of the number of moles of methanol and two times the number of moles of dimethyl ether; and reacting ethylene and methanol and/or dimethyl ether of the mixture in the presence of a catalyst, wherein the amount of ethylene that is discharged from the reaction system is controlled to a reduced level in comparison to the amount of ethylene that is fed into the reaction system, and the yield of propylene is controlled to at least 40 mol %, based on the sum of the number of moles of methanol and two times the number of moles of dimethyl ether, which are fed into the reaction system.