Method of purifying quinaldine

Details Method of purifying quinaldine Method of purifying quinaldine

1998-06-25

2000-02-01

Mach, D. Margaret

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21504

Patent

active

06020494&

ABSTRACT:
In a method of purifying quinaldine prepared from coal tar, a phenol, cresol and xylenol-type mononuclear aromatic compound is added to the quinaldine fraction, said aromatic compound is crystallized out forming an adduct with quinaldine and the quinaldine/mononuclear aromatic adduct is then separated, whereby, before the mononuclear aromatic compound is added, 5% to 20% by weight of a mixture of aromatic compounds or toluene, in relation to the mass of the quinaldine fraction, is added to the quinaldine fraction.

REFERENCES:
patent: 4081351 (1978-03-01), Heinemann
patent: 4429170 (1984-01-01), Lovell
patent: 4443636 (1984-04-01), Greco
patent: 4583990 (1986-04-01), McGarry
patent: 4656279 (1987-04-01), Okazaki
Chemical Abstracts, 106:4899e, Separation and Purification of Quinaldine, 1987, based on JP 61 93,165.

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