Process for the purification of aqueous solutions of low molecul

Details Process for the purification of aqueous solutions of low molecul Process for the purification of aqueous solutions of low molecul

1979-12-17

1981-04-07

Sever, Frank

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

Organic compounds

Oxygen containing

203 38, 203 41, 203 66, 568497, 568872, 210664, 210668, 210687, 210688, C07C 2726, C07C 2974

Patent

active

042608279

ABSTRACT:
The invention is directed to a process for the purification of aqueous solutions of low molecular weight polyhydroxyl compounds containing calcium or lead compounds or mixtures thereof. Methanol and a precipitant for calcium and/or lead ions in a quantity equivalent to the ions to be removed are added to the solutions. The deposits thus formed are removed and the residual solutions are treated with a cation exchanger followed by distillation of the low-boiling fractions. The distillation sump which essentially contains the low molecular weight polyhydroxyl compounds is then treated with an anion exchanger.

REFERENCES:
patent: 3040104 (1962-06-01), Sarappo et al.
patent: 3134814 (1964-05-01), Sargent et al.
patent: 3315002 (1967-04-01), Small
patent: 3778368 (1973-12-01), Nakamura et al.
patent: 4062900 (1977-12-01), Tanabe et al.

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