Production of butanediol

Details Production of butanediol Production of butanediol

2005-11-29

2005-11-29

Shippen, Michael L. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

Reexamination Certificate

active

06969780

ABSTRACT:
The catalytic hydrogenation of HBA and/or HMPA is improved by either or both of (1) increasing the temperature in the hydrogenation zone from about 50 to 70° C. at the inlet to above 80° C. at the outlet and (2) raising the pH of the hydrogenation feed to 4.5–6.0 before hydrogenation.

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patent: 5874652 (1999-02-01), Pitchai et al.
patent: 5945570 (1999-08-01), Arhancet et al.
patent: 6225509 (2001-05-01), Dubner et al.

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