Production of long chain olefinic hydrocarbons by polymerization

Claim 1

A PROCESS FOR THE PRODUCTION OF OLEFINIC HYDROCARBONS CONTAINING FROM ABOUT 12 TO ABOUT 15 CARBON ATOMS PER MOLECULE WHICH COMPRISES SUBJECTING A MONOMERIC OLEFINIC HYDROCARBON FRACTION CONTAINING PREDOMINANTLY C6 OLEFINIC MONOMERS TO A PRIMARY POLYMERIZATION REACTION IN THE PRESENCE OF A SOLID POLYMERIZATION CATALYST, ADMIXING THE OLEFINIC REACTION PRODUCTS OF THE PRIMARY REACTION, SOME OF WHICH ARE LIQUID AT THE OPERATING CONDITIONS, WITH A PREDOMINANTLY C3 HYDROCARBON FRACTION CONTAINING PROPYLENE, SUBJECTING SAID OLEFINIC HYDROCARBON MIXTURE TO A SECONDARY POLYMERIZATION REACTION IN THE PRESENCE OF A SOLID POLYMERIZATION CATALYST, SEPARATING FROM THE REACTION PRODUCTS OF THE SECONDARY REACTION SAID OLEFINIC HYDROCARBONS CONTAINING FROM ABOUT 12 TO ABOUT 15 CARBON ATOMS PER MOLECULE, A FRACTION COMPRISING C6 HYDROCARBONS AND A FRACTION COPRISING C9 HYDROCARBONS, DIRECTING SAID FRACTION COMPRISING C6 HYDROCARBONS TO SAID PRIMARY POLYMERIZATION REACTION AND RECYCLING SAID FRACTION COMPRISING C9 HYDROCARBONS TO SAID SECONDARY POLYMERIZATION REACTION.