| 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, the first unsaturated compound being capable of producing an unsaturated coproduct comprising more than 14 carbon atoms, by homometathesis, said process comprising at least one production phase which comprises:
feeding a reactor with the first unsaturated compound; feeding the reactor with the second unsaturated compound; feeding the reactor with at least a first metathesis catalyst, then feeding the reactor with at least a second metathesis catalyst; withdrawing a product stream arising from the reactor; the turnover number of the first catalyst being higher than the turnover number of the second catalyst so as to achieve the same target degree of conversion of the first unsaturated compound, the turnover numbers of the catalysts being determined under temperature, pressure, stoichiometry and reagent concentration conditions identical to those of the production phase. |
