Patent ID: 9487455
Filing Date: 2016-11-08
CPC Classification: C07C

Claim Text:
1. A process for preparing an olefin comprising performing hydrogenolysis of sugar or saponification of at least one fatty oil with caustic to obtain a crude alcohol stream, subjecting the crude alcohol stream to dehydroxylation in presence of a liquid reaction medium and a halogen-based catalyst selected from the group consisting of iodine (I wherein the crude alcohol stream is selected from the group consisting of glycerol, propylene glycol, ethylene glycol, and combinations thereof, wherein the crude alcohol stream further comprises a total amount of 5 weight percent to 25 weight percent, based on weight of the crude alcohol stream as a whole, of at least one contaminant selected from the group consisting of alkali metal chlorides, alkali metal phosphates, water, oils, and combinations thereof, the dehydroxylation conditions comprising