CROSS METATHESIS PROCESS

摘要

A process for the synthesis of an unsaturated product by cross metathesis between a first unsaturated compound having at least 8 carbon atoms and a second unsaturated compound having less than 8 carbon atoms, including: feeding a reactor with the first unsaturated compound, the second unsaturated compound and a metathesis catalyst; withdrawing an output stream, at the output of the reactor; separating the output stream, making it possible to recover at least: on the one hand, the unsaturated product and, on the other hand, the first unsaturated compound and the second unsaturated compound; recycling the first unsaturated compound and the second unsaturated compound to the reactor; in which the first unsaturated compound is capable of producing an unsaturated coproduct, including at least 14 carbon atoms, by homometathesis; and in which the flow rates for feeding the reactor with first unsaturated compound and with second unsaturated compound are adjusted.

主权项

1. A process for the synthesis of an unsaturated product by cross metathesis between a first unsaturated compound comprising at least 8 carbon atoms and a second unsaturated compound comprising less than 8 carbon atoms, comprising:
feeding a reactor with the first unsaturated compound, the second unsaturated compound and a metathesis catalyst; withdrawing an output stream, at the output of the reactor; separating the output stream, making it possible to recover at least: on the one hand, the unsaturated product and, on the other hand, the first unsaturated compound and the second unsaturated compound; recycling the first unsaturated compound and the second unsaturated compound to the reactor; wherein the first unsaturated compound is capable of producing an unsaturated coproduct comprising at least 14 carbon atoms, by homometathesis; and wherein the flow rates for feeding the reactor with first unsaturated compound and with second unsaturated compound are adjusted such that the molar ratio of the net amount of unsaturated coproduct produced in the reactor to the net amount of first unsaturated compound converted in the reactor is kept below a predetermined threshold, and wherein the degree of conversion of the first unsaturated compound is from 30% to 90%.