DEHYDROXYLATION OF POLYETHER POLYOLS AND THEIR DERIVATIVES USING A HALOGEN-BASED CATALYST

摘要

Polyether polyols, derivatives and combinations thereof are converted to olefins under reductive or non-reductive dehydroxylation conditions, in the presence of a halogen-based catalyst. Derivatives include polyether polyols incorporated in polyurethanes. The process includes 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 the starting material to halogen atoms from 1:10 to 100:1.

主权项

1. A process for preparing an olefin comprising subjecting a starting material containing at least one polyether polyol, at least one derivative of a polyether polyol, or a combination thereof, 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 pounds 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 starting material to moles of the halogen atoms ranging from 1:10 to 100:1; such that at least one olefin is formed.