Process for the purification of o-phthalaldehyde

Details Process for the purification of o-phthalaldehyde Process for the purification of o-phthalaldehyde

1997-10-29

1999-02-23

Geist, Gary

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

Organic compounds

Oxygen containing

568425, C07C 4527

Patent

active

058746374

ABSTRACT:
Process for the purification of o-phthalaldehyde in which an alcoholic solution containing the crude, unpurified o-phthalaldehyde is adjusted to a pH between 0 and 3 at a temperature between 0.degree. and 60.degree. C., then an alkaline solution is added, and the corresponding dialkoxyphthalan is extracted from the organic phase and purified by distillation and, when required, converted into the purified o-phthalaldehyde by hydrolysis.

REFERENCES:
patent: 4769464 (1988-09-01), Sajtos
patent: 5326438 (1994-07-01), Hermeling
Sturrock et al. Canadian Journal of Chemistry, 49, pp. 3047-3051, 1971.

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