Dow Global Technolgoies LLC

Nitin Kore

Raj Madhukar Deshpande

Vandana Neeraj Pandey

Paul Davis

John Robert Briggs

Raj Deshpande

Vandana Pandey

Olefins are produced by the reductive dehydroxylation of vicinal polyols or esters thereof, or a combination thereof, in a liquid reaction medium, under a hydrogen atmosphere, at a temperature from 50&#xb0; C. to 250&#xb0; C., in the presence of a halogen-based, preferably iodine-based, catalyst. Examples of the catalyst, which may be included independently or generated in situ, are iodine (I), hydroiodic acid (HI), iodic acid (HIO), lithium iodide (LiI), and combinations thereof.

Iodine-based catalyst for reductive dehydroxylation of vicinal polyols to olefins

Olefins may be produced by the reductive dehydroxylation of vicinal polyols and/or their respective esters, in an aqueous reaction medium, under a hydrogen atmosphere, under suitable conditions, and in the presence of a halogen-based, preferably iodine-based, catalyst, wherein a solubility enhancing agent is employed to increase the solubility of the iodine-based catalyst in the aqueous reaction medium.

Reductive dehydroxylation of vicinal polyols to olefins using an iodine-based catalyst having enhanced solubility

Crude alcohol streams are converted to olefins under reductive or non-reductive dehydroxylation conditions, in the presence of a halogen-based catalyst. The process includes autogenous gas pressure or a gas pressure from 1 psig (&#x2dc;6.89 KPa) to 2000 psig (&#x2dc;13.79 MPa), a temperature from 50&#xb0; C. to 250&#xb0; C., a liquid reaction medium, and a molar ratio of alcohol to halogen from 1:10 to 100:1.

Dehydroxylation of crude alcohol streams using a halogen-based catalyst

Olefins may be produced by the non-reductive dehydroxylation of vicinal polyols and/or their respective esters, in a liquid reaction medium, under a substantially non-reductive atmosphere, in the presence of a halogen-based, preferably iodine-based, catalyst. The reaction medium may be aqueous, non-aqueous, or a combination thereof, and may in some embodiments include a solubility enhancing agent.

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Solapur, India

Nitin Kore