A PROCESS FOR PRODUCING ETHYLENE FROM ETHANOL COMBINING THE CATALYTIC CONVERSION OF HYDROCARBONS

摘要

Disclosed is a process for producing ethylene from ethanol combining the catalytic conversion of hydrocarbons, wherein an ethanol feedstock is contacted with a Y-zeolite containing catalyst to give a reaction product, a coked catalyst and a target product of ethylene are obtained by passing the reaction product through a separator, a hydrocarbon feedstock is contacted with a Y-zeolite containing catalyst to give a reaction product, a spent catalyst and a reaction oil and gas are obtained by passing the reaction product through a separator, the reaction oil and gas is further separated to give liquid products such as gas, gasoline and the like, a part or all of the coked catalyst or a part or all of the spent catalyst enter a regenerator for coke-burning regeneration, and the regenerated catalyst is divided into two portions, one of which returns to be contacted with the hydrocarbon feedstock, and the other of which, after cooling, returns to be contacted with ethanol feedstock. This process not only reasonably utilizes the excessive thermal energy of the hydrocarbon catalytic conversion, but also solves the problem of heat supply for the conversion of ethanol, thus ensuring the continuous conversion of ethanol to ethylene and generating enormous economic benefits. For the catalytic conversion of the ethanol, the content of ethylene is up to 95vol% or more in the gas product, and the conversion of ethylene is up to 99% or more. For the catalytic conversion of the hydrocarbons, the yield of the light products increases slightly by at least 2mol%.