Chemical process for producing isoprene by pyrolysis of allylic esters
AssigneeHalcon International, Inc.
InventorCharles N. Winnick
Life of this patent
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Abstract
Process for preparing unsaturated esters by reacting an olefin having an allylic hydrogen atom with an ester forming material in the presence of oxygen and a catalyst selected from the group consisting of mercury, selenium or tellurium. The unsaturated ester may be converted to a polyunsaturated compound by pyrolysis.
Claims6
A water tolerant process for the preparation of isoprene which comprises treating in the presence of a catalyst methylbutene with an aliphatic, mono-carboxylic acid having 2 to 8 carbon atoms and an oxidizing agent containing molecular oxygen at pressures of from about 0.5 atmosphere to about 70 atmospheres and at temperatures of from about 30.degree. C. to about 200.degree. C., the catalyst being mercury, selenium, or tellurium, an oxide, or an organic salt of said metals, or mixtures thereof, whereby to produce ester precursors which are allylic esters, and subjecting said allylic ester precursors thereby produced to pyrolysis conditions. thereby producing said isoprene.
Dependencies are inferred from the claim text.