Condensed phase preparation of 2,3-pentanedione

Details Condensed phase preparation of 2,3-pentanedione Condensed phase preparation of 2,3-pentanedione

1997-04-24

1998-11-03

Geist, Gary

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

Organic compounds

Oxygen containing

C07C 4500

Patent

active

058311300

ABSTRACT:
A condensed phase process for the preparation of purified 2,3-pentanedione from lactic acid and an alkali metal lactate is described. The process uses elevated temperatures between about 200.degree. to 360.degree. C. for heating a reaction mixture of lactic acid and an alkali metal lactate to produce the 2,3-pentanedione in a reaction vessel. The 2,3-pentanedione produced is vaporized from the reaction vessel and condensed with water.

REFERENCES:
patent: 2859240 (1958-11-01), Holmen et al.
patent: 4729978 (1988-03-01), Sawicki
Wadley, Douglas C. et al, Lactic Acid Conversion to 2,3-Pentanedione and Acrylic Acid over . . . Journal of Catalysis 165, 162-171 (1997).
Gunter, Garry C., et al., FTIR and .sup.31 P-NMR Spectroscopic Analyses of Surface Species . . . Journal of Catalysis 164, 207-219 (1996).
Gunter, et al., Journal of Catalysis 148, 252-260 (Jun.-Jul. 1994).
Gunter, et al., Ind.-Eng. Chem. 34:974-980 (1995).
Biomass conference 1298-1304 (Aug. 30-Sep. 2, 1993).
Proc. 14th North American Meeting of Catalysis Society (Jun. 1993).
AIChE Meeting (Nov. 1994).
Corn Utilization Conference (Jun. 1994).
AIChE (Fall 1992).
Corn Utilization Conference (1992).

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