Process of generating a renewable biofuel from a hydrotreated stream of condensed oxygenates

摘要

A renewable fuel may be obtained from a bio-oil containing C3-C5 oxygenates. In a first step, the bio-oil is subjected to a condensation reaction in which the oxygenates undergo a carbon-carbon bond forming reaction to produce a stream containing C6+ oxygenates. In a second step, the stream is hydrotreated to produce C6+ hydrocarbons.

主权项

1. A process for producing a renewable biofuel from liquid bio-oil, the process comprising:
(a) subjecting a liquid bio-oil feedstream containing carbonyl oxygenates to a carbon-carbon bond forming condensation reaction to form C6+ enriched condensates, wherein the oxygenates are selected from the group consisting of C3 oxygenates, C4 oxygenates, C5 oxygenates and mixtures thereof, and further wherein the C3, C4 and C5 oxygenates are selected from the group consisting of carboxylic acids, carboxylic acid esters, ketones and aldehydes; (b) contacting the bio-oil containing condensates of step (a) with hydrogen and hydrotreating the condensates to form a hydrotreated bio-oil comprising C6+ hydrocarbons; and (c) fractionating the hydrotreated bio-oil to obtain a C6+ renewable biofuel,wherein the condensation reaction in step (a) and the hydrotreating in step (b) occurs in the same reactor.