DEHYDROXYLATION OF CRUDE ALCOHOL STREAMS USING A HALOGEN-BASED CATALYST

摘要

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 (˜6.89 KPa) to 2000 psig (˜13.79 MPa), a temperature from 50° C. to 250° C., a liquid reaction medium, and a molar ratio of alcohol to halogen from 1:10 to 100:1.

主权项

1. A process for preparing an olefin comprising subjecting a crude alcohol stream including an alcohol selected from glycerol, propylene glycol, ethylene glycol, and combinations thereof, further containing an amount of at least one contaminant, to dehydroxylation conditions in the presence of a halogen-based catalyst containing at least one halogen atom per molecule thereof, which conditions include a reductive or a non-reductive gas, at an applied pressure of from 1 pound per square inch gauge (˜6.89 kilopascals) to 2000 pound per square inch gauge (˜13.79 megapascals), or at autogenous pressure; a temperature within a range of from 50° C. to 250° C.; a liquid reaction medium; and a ratio of moles of the alcohol to moles of the halogen atoms ranging from 1:10 to 100:1; such that at least one olefin is formed and the amount of the at least one contaminant is reduced.