Exxonmobil Chemical Patents Inc.

Christopher David William Jenkins

James Richardson Lattner

Michael J Veraa

Keith Holroyd Kuechler

Guang Cao

James Harding Beech, Jr

Richard B Hall

Thomas Herman Colle

This invention is directed to a process for producing olefin product from an oxygenate feed that includes dimethyl ether (DME). The process uses an olefin forming catalyst that contains a porous crystalline material, preferably a porous crystalline aluminosilicate molecular sieve material. The process produces high quantities of light olefin (i.e., ethylene, propylene, and mixtures thereof).

Production of light olefins

Degradation of catalyst activity for silicoaluminophosphate catalysts is minimized for oxygenate-to-olefin reaction systems that are exposed to airborne salt concentrations above a threshold value. When airborne salt concentrations above the threshold value are detected, an air intake flow can be diverted into a cleaning flow path and/or an alternative source of regeneration media can be provided.

Method for protecting catalyst against contaminant ingress

A method of producing synthesis gas for methanol synthesis that comprises the steps of: (a) obtaining a hydrogen stream that has greater than 5 mol % methane from an external process; (b) feeding into a reforming reactor: (i) a feed gas that comprises methane, (ii) water in a specified amount, (iii) oxygen in a specified amount, and (iv) the hydrogen stream in a specified amount; (c) reacting the feed gas, water, oxygen and the hydrogen stream in the reactor; and (d) withdrawing from the reactor the synthesis gas that is at a specific temperature, has less than 3 mol % methane, and has a stoichiometric number of from 1.9 to 2.3.

Synthesis gas production and use

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South Caulfield, Australia

Christopher David William Jenkins