Purification of halogenated aromatic compounds

Details Purification of halogenated aromatic compounds Purification of halogenated aromatic compounds

1987-11-18

1989-07-11

Gray, Bruce D.

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

Organic compounds

Oxygen containing

C07C 4101

Patent

active

048474282

ABSTRACT:
A process for recrystallization of a brominated aromatic compound under pressure for purifying it from the contamination by bromine and hydrogen bromide, comprising the steps of: placing the brominated aromatic compound in a solvent or a combination of solvents selected from toluene, 1,dibromoethane, m-xylene, benzene, dichloromethane, chloroform, and 1,2-dichloroethane; adding into the resultant mixture a base or a combination of bases selected from pyridine, ethylene diamine, n-butylamine, tert-butylamaine, triethylamine, sodium ethoxide, sodium hydroxide, potassium hydroxide, sodium carbonate, and sodium bicarbonate; and heating the resultant mixture to a temperature above the atmospheric boiling point and at a pressure above the vapor pressure of the resultant material at that temperature.

REFERENCES:
patent: 4214103 (1980-07-01), Garman et al.

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