Process for the preparation of 1-octene

Details Process for the preparation of 1-octene Process for the preparation of 1-octene

2008-05-06

2008-05-06

Dang, Thuan Dinh (Department: 1797)

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce unsaturate

C585S324000, C585S273000

Reexamination Certificate

active

07368622

ABSTRACT:
Process in two steps for the preparation of 1-octene starting from butadiene which comprises: a first step (a) in which the bis-hydrodimerization of butadiene to 1,7-octadiene is effected in the presence of a catalyst based on a palladium complex containing one or more tri-substituted monodentate phosphines, in an aprotic polar solvent optionally containing an organic base; a second step (b) in which the partial catalytic hydrogenation of 1,7-octadiene to 1-octene is effected, the above process being characterized in that: (i) in the first step the aprotic polar solvent is selected from disubstituted cyclic ureas; (ii) in the second step the catalyst is selected from non supported ruthenium complexes having general formula (II): RuXmLn(II).

REFERENCES:
patent: 4229605 (1980-10-01), Nozaki
patent: 4243829 (1981-01-01), Pittman et al.
patent: 0 008 139 (1980-02-01), None
patent: 0 704 417 (1996-04-01), None
patent: 03/031378 (2003-04-01), None
Roffia, P. et al., “Catalysis by palladium salts IV. selective hydrogenation with formic acid in the palladium catalysed dimerisation of 1,3-butadiene; syntheses of 1,7-octadiene”, Journal of Organometallic Chemistry, vol. 55, pp. 405-407, 1973.
U.S. Appl. No. 10/576,463, filed Apr. 20, 2006, Delledonne.

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