METHOD FOR PRE-TREATING CATALYST USED IN PREPARING LOW CARBON ALKENES WITH METHANOL OR DIMETHYL ETHER

摘要

A method for pre-treating catalyst used in preparing low carbon alkenes with methanol or dimethyl ether is provided. It comprises: (1) putting the catalyst to be treated in a pre-treating reactor; (2) leading pre-treating gas into the pre-treating reactor for the catalyst pre-treatment to enable the pre-treated catalyst to contain more than 2% and less than 15% of coke based on the weight of the catalyst; the pre-treating gas is one or more of hydrocarbon and hydrocarbon-oxygen compounds containing 2-6 carbon atoms.