| US 7,615,671 B2 | ||
| Hydrogenation process for the preparation of 1,2-diols | ||
| Thomas Allen Puckette, Longview, Tex. (US); and Kenneth Wayne Hampton, Jr., Gladewater, Tex. (US) | ||
| Assigned to Eastman Chemical Company, Kingsport, Tenn. (US) | ||
| Filed on Nov. 20, 2008, as Appl. No. 12/274,787. | ||
| Claims priority of provisional application 60/991529, filed on Nov. 30, 2007. | ||
| Prior Publication US 2009/0143612 A1, Jun. 04, 2009 | ||
| Int. Cl. C07C 29/149 (2006.01); C07C 29/141 (2006.01); C07C 29/145 (2006.01) | ||
| U.S. Cl. 568—864 [568/862; 568/863] | 15 Claims |
| 1. A process for preparing a 1,2-diol, which comprises contacting a 1,2-dioxygenated organic compound, with the exception
of oxalic acid or ester thereof, with hydrogen, under hydrogenation conditions, in the presence of a catalyst composition
comprising:
(a) a ruthenium compound;
(b) a trivalent phosphorus compound selected from 1,1,1-tris(diarylphosphinomethyl)alkyl or substituted alkyl; and
(c) a promoter selected from Lewis acids, protic acids having an ionization constant (Ki) of 5×10−3 or greater, onium salts, and mixtures thereof;
wherein said catalyst components (a)-(c) are dissolved in an organic solvent, to produce a 1,2-diol.
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