Method for synthesizing bio-based pyridine and picolines

摘要

The present invention relates to a method for synthesizing bio-based pyridine and picolines, said method including at least the following steps: a first step involving subjecting a glycerol filler, created from the methanolysis of vegetable oils or animal fats, to a dehydration reaction leading to acrolein; a second step involving partial condensation of the effluent from the first step so as to separate a water-rich flow as well as an acrolein-rich flow; and a third step involving reacting the acrolein from the preceding step with acetaldehyde in the presence of ammonia so as to obtain, by means of a condensation reaction, the bio-based pyridine and picolines.

主权项

1. A process for synthesizing biosourced pyridine and picolines, comprising:
a) subjecting a glycerol charge derived from methanolysis of plant oils or animal fats to a dehydration reaction leading to acrolein according to the reaction CH2OH—CHOH—CH2OH→CH2═CH—CHO+2H2O and then b) partially condensing of the effluent derived from a), to separate a stream rich in water and a stream rich in acrolein, and c) reacting the acrolein obtained from b) with acetaldehyde, in the presence of ammonia, and in gaseous phase at a pressure between 0.5 and 10 bar to obtain, via a condensation reaction, biosourced pyridine and picolines.