Preparation of a catalyst useful in the dimerization of...

Details Preparation of a catalyst useful in the dimerization of... Preparation of a catalyst useful in the dimerization of...

B - Operations, Transporting

01

J

252/83, 260/693.

B01J 27/24 (2006.01) B01J 31/18 (2006.01) B01J 31/20 (2006.01) C07C 2/02 (2006.01) C07C 2/52 (2006.01) C07C 13/20 (2006.01)

Patent

CA 2016187

Abstract Catalysts suitable for the dimerization of a diolefin, e.g. butadiene to 4-vinylcyclohexene, are prepared by reacting (1) iron chloride and sodium nitrite or alternatively (2) iron nitrosyl chloride with (3) carbon monoxide in an organic solvent in the presence of a readily oxidizable metal, e.g. tin. The catalyst solution is filtered prior to use to remove particulate matter such as unreacted tin. While the reaction employing iron chloride and sodium nitrite is preferred, the catalyst produced by either method contains a minimum of reducing agent and by-products. It can be isolated and stored in the absence of the butadiene monomer while retaining its stability and activity. 37,439-F

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