Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1996-08-09
1998-09-22
Chang, Ceila
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
502 60, C07C 33025, C07C 3303, C07C 3120
Patent
active
058116010
ABSTRACT:
This invention relates to a process for the isomerization of a vinyl glycol to an unsaturated diol in the presence of a rhenium-based catalyst; and to a catalyst for said isomerization. More specifically, this invention relates to the isomerization of 3-butene-1,2-diol to 2-butene-1,4-diol; and to a process for the manufacture of 1,4-butanediol involving the step of isomerizing 3-butene-1,2-diol to 2-butene-1,4-diol in the presence of said catalyst. The catalyst is characterized in that it comprises a transition metal on a carrier wherein the carrier is a zeolite Y type substance containing silicon and aluminum in a mole ratio of from about 1.5:1 to about 1000:1, and the transition metal is rhenium or a rhenium compound and mixtures thereof present in an amount of from about 0.1 to about 50 weight percent based on total combined weight of the carrier and of the rhenium or rhenium compound and mixtures thereof.
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Jacobs Pierre A.
Martens Johan
Remans Thomas J.
Steijns Mathias H. G.
van Oeffelen Dominicus A. G.
Chang Ceila
M. Mach D. Margaret
The Dow Chemical Company
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