Patent ID: 8536396

Claim:
A process for converting a carbon containing feedstock to provide an effluent containing light olefins, the process comprising: forming a catalyst, wherein the catalyst is formed by supplying an MEL crystalline silicate catalyst; steam treating the MEL crystalline silicate catalyst; after steam treating, contacting the MEL crystalline silicate catalyst with a complexing agent for aluminum; after contact with the complexing agent, reducing the sodium content of the MEL crystalline silicate catalyst by subjecting the MEL crystalline silicate catalyst to ion exchange with a salt; calcining the MEL crystalline silicate catalyst after reducing the sodium content of the MEL crystalline silicate catalyst; passing a feedstock containing carbon containing compounds consisting essentially of C 1 to C 6 aliphatic hetero compounds selected from the group consisting of alcohols, ethers, carbonyl compounds and mixtures thereof and containing steam in an amount up to 80 weight % of said feedstock, through a reactor containing the catalyst to produce an effluent including propylene which is recovered from the reactor, wherein the feedstock is passed over the crystalline silicate at a reactor inlet temperature of about 550° C.