Patent ID: 8993819
Filing Date: 2015-03-31
Classification: C07C,Y02P

Abstract:
1. A process for preparing cycloheptene, the process comprising: ring-closing metathesis of 1,8-dienes of the formula I, conducted in the presence of a catalyst, where R1 is an alkyl group having 8 carbon atoms, wherein the ring-closing metathesis is performed in a reaction mixture in the presence of in inert solvent, wherein the inert solvent is at least one solvent selected from the group consisting of a high-boiling aromatic hydrocarbon, halongenated hydrocarbon, and halogenated aromatic compound, and the process further comprises removing cycloheptene by distillation from the reaction mixture and isolating cycloheptene, and metering into the reaction mixture the 1,8-diene of the formula I such that the concentration of the 1,8-diene of the formula I in the reaction mixture does not exceed 1 mol/l, wherein the process is a continuous process.