| abstract |
Process for the purification of o-phthalaldehyde in which an alcoholic solution containing the crude, contaminated o-phthalaldehyde is adjusted to a pH between 0 and 3 at a temperature between 0 and 60 ° C., then mixed with an alkali and the corresponding dialkoxyphthalane is removed the organic phase is extracted and purified by distillation and, if necessary, converted into the purified o-phthalaldehyde by hydrolysis. |