Method for producing cycloolefin and cycloalkane under controlle

Details Method for producing cycloolefin and cycloalkane under controlle Method for producing cycloolefin and cycloalkane under controlle

1998-04-02

1999-10-19

Griffin, Walter D.

Chemistry of hydrocarbon compounds

Adding hydrogen to unsaturated bond of hydrocarbon, i.e.,...

Hydrocarbon is aromatic

585266, 585271, 585273, C07C 510, C07C 505

Patent

active

059692022

ABSTRACT:
A method for producing a cycloolefin and a cycloalkane, which method comprises: a step of hydrogenating a monocyclic aromatic hydrocarbon under an acidic condition in the presence of a catalyst composition, (i) wherein said catalyst composition is a slurry which comprises a ruthenium catalyst, water and zinc sulfate, and which is preserved, prior to being used in said hydrogenation reaction, under a high temperature and high pressure hydrogen atmosphere of from 100 to 200.degree. C. and from 1 to 100 atm for 1 hour or more, and (ii) wherein said hydrogenation reaction is conducted under a controlled pressure, while maintaining a phase separated state of: (a) an oil phase comprising, as main components, the starting materials and the products; and (b) a water phase comprising water as a main component, to thereby control a formation molar ratio of the cycloolefin and the cycloalkane to be formed.

REFERENCES:
patent: 4734536 (1988-03-01), Nagahara et al.
patent: 5656761 (1997-08-01), Nagahara et al.
C.U. Ingemar Odenbrand and Sten T. Lundin, "Hydrogenation of Benzene to Cyclohexene on a Ruthenium Catalyst: Influence of Some Reaction Parameters", J. Chem. Tech. Biotechnol.(1980) pp. 677-687.
J. Struijk, M. d'Angremond, W.J.M Lucas-de Regt and J.J.F. Scholten, "Partial liquid phase hydrogenation of benzene to cyclohexene over ruthenium catalysts in the presence of an aqueous salt solution", Applied Catalysis A: General, 83 (1992) pp. 263-295.

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