Inventor
HIRAGA YOICHI
11 patents
Patents
11 patentsUS4355014AOct 19, 1982
Stable calcium hypochlorite composition and method for manufacture thereof
TOYO SODA MFG CO LTD48 citations91
US4582937AApr 15, 1986
Process for recovering ethyleneamines
TOYO SODA MFG CO LTD10 citations73
US4377562AMar 22, 1983
Solvent extraction method of phosphoric acid
TOYO SODA MFG CO LTD7 citations73
US4154805AMay 15, 1979
Phosphoric acid purification
TOYO SODA MFG CO LTD7 citations72
US4070443AJan 24, 1978
Process for removing sulfate ions from extracted phosphoric acid with a barium compound
TOYO SODA MFG CO LTD14 citations72
US4044108AAug 23, 1977
Process for removing organic material from wet process phosphoric acid
TOYO SODA MFG CO LTD11 citations72
US4041134AAug 9, 1977
Process for removing sulfate ions from extracted phosphoric acid employing barium compounds and activated carbon
TOYO SODA MFG CO LTD8 citations72
US4349519ASep 14, 1982
Purification of wet process phosphoric acid
TOYO SODA MFG CO LTD2 citations62
US4637922AJan 20, 1987
Method for removing organic materials from a wet process phosphoric acid
TOYO SODA MFG CO LTD5 citations61
US4208389AJun 17, 1980
Purification of phosphoric acid
TOYO SODA MFG CO LTD4 citations61
US4169881AOct 2, 1979
Process for removing dissolved silica from extracted phosphoric acid
TOYO SODA MFG CO LTD0 citations50