PURPOSE: To produce an aromatic carboxylic acid chloride on an industrial scale at a low cost using a catalyst easily handleable and separable from the product by reacting an aromatic carboxylic acid with trichloromethylbenzenes in the presence of a solid acid catalyst in liquid phase.
CONSTITUTION: The objective aromatic carboxylic acid chloride is produced on an industrial scale at a low cost by reacting an aromatic carboxylic acid with trichloromethylbenzenes in liquid phase in the presence of a solid acid catalyst such as crystalline aluminosilicate, amorphous silica.alumina, silica.zirconia, alumina, strongly acidic ion exchange resin, activated clay, montmorillonite, zirconium phosphate and metal oxide supporting oxyacid radical. The process has various merits such as remarkable reduction of the load of waste water disposal in addition to the above-mentioned effects.
NAKAJIMA HITOSHI
