Process for removing oxygenates from an olefinic stream

Chemistry of hydrocarbon compounds – Plural serial diverse syntheses – To produce unsaturate

Reexamination Certificate

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C585S639000, C585S804000

Reexamination Certificate

active

06987208

ABSTRACT:
The present invention provides a process for removing oxygenate impurities, e.g., dimethyl ether, from an olefinic product stream by converting the oxygenate impurity to a compound whose boiling point differs by at least about 5° C. from the oxygenate impurity. Typically, the compound is more readily removable from the product stream than the oxygenate impurity.

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Engelen et al., “The Conversion of Dimethylether Over Pt/H-ZSm3. A Bifunctional Catalzyed Reaction.”Catalysts by Acids and Bases, Elsevier Science Publishers, Amsterdam, pp. 391-398 (1985).
Chen et al., “The Role of Sillover in Hydrogenation of Oxygenates Absorbed on Ni/AI203”, New Aspects of Spillover Effect in Catalysis, Elsevier Science Publishers, pp. 171-175 (1983).

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