US 2006/0235251 A1 · Production of olefins

Abstract

A process for converting a hydrocarbon feedstock to provide an effluent containing light olefins, the process comprising passing a hydrocarbon feedstock, the feedstock containing at least one C1 to C6 aliphatic hetero compound selected from alcohols, ethers, carbonyl compounds and mixtures thereof and steam in an amount whereby the feedstock contains up to 80 weight % steam, through a reactor containing a crystalline silicate catalyst to produce an effluent including propylene, the crystalline silicate having been subjected to de-alumination by a steaming step and being selected from at least one of an MFI-type crystalline silicate having a silicon/aluminium atomic ratio of from 250 to 500 and an MEL-type crystalline silicate having a silicon/aluminium atomic ratio or from 150 to 800.

Claims22

Dependent claims

A process for converting a hydrocarbon feedstock to provide an effluent containing light olefins, the process comprising passing a hydrocarbon feedstock containing at least one C1 to C6 aliphatic hetero compound 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 a crystalline silicate catalyst to produce an effluent including propylene which is recovered from the reactor, wherein the crystalline silicate catalyst is pretreated by subjecting said catalyst to steaming to de-aluminate said catalyst and is selected from at least one of an MFI-type crystalline silicate having a silicon/aluminum atomic ratio within the range of 250 to 500 and an MEL-type crystalline silicate having a silicon/aluminum atomic ratio within the range of 150 to 800.

Dependencies are inferred from the claim text.

Production of olefins

Life of this patent

Production of olefins

Life of this patent

Abstract

Claims22