Oblon, Fisher, Spivak, McClelland & Maier
Method of removing scale caused by raffinate in a phosphoric acid purification process
 A scale deposited from a raffinate in a purification of a wet process phosphoric acid with an organic solvent or a mixture of an organic solvent and a strong acid by an extraction method is contacted with a solution containing a strong base to react with iron and aluminum components in the scale. 
Toyo Soda Manufacturing Co., Ltd.
C
C01B
inventional
Sakumi Masao Osamu
Fujii Uchida Watanabe