Process for recovering purified 4-hydroxy-2,4,6-trimethyl-2,5-cy

Details Process for recovering purified 4-hydroxy-2,4,6-trimethyl-2,5-cy Process for recovering purified 4-hydroxy-2,4,6-trimethyl-2,5-cy

1974-04-29

1976-08-17

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

203 91, 260586P, C07C 4524, C07C 2926

Patent

active

039754413

ABSTRACT:
A process for recovering purified 4-hydroxy-2,4,6-trimethyl-2,5-cyclohexadiene-1-one by distilling crude 4-hydroxy-,2,4,6-trimethyl-2,5-cyclohexadien-1-one. Preferably, the distillation is performed at a temperature of 40.degree. to 250.degree.C. using crude 4-hydroxy-2,4,6-trimethyl-2,5-cyclohexadien-1-one having a pH of 4 to 11.5. Thus, 4-hydroxy-2,4,6-trimethyl-2,5-cyclohexadien-1-one of high purity and reduced coloration can be recovered at a high recovery ratio.

REFERENCES:
patent: 3462348 (1969-08-01), Wellman et al.
patent: 3758596 (1973-09-01), Reed et al.
patent: 3840023 (1974-10-01), Demole
Adler et al., "Acta. Chem. Scanda." , vol. 14, pp. 1580-1596 (1960).
Bamberger et al., "Ber.", vol. 33, p. 3636, (1900).

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