Inventor
OHTA TAZUO
JP6 patents
Patents
6 patentsUS5132450AJul 21, 1992
Process for producing high purity isophthalic acid
MITSUBISHI GAS CHEMICAL CO92 citations92
US4268690AMay 19, 1981
Process for producing terephthalic acid of high purity
MITSUBISHI GAS CHEMICAL CO40 citations91
US4297507AOct 27, 1981
Process and apparatus for producing terephthalic acid with high purity
MITSUBISHI GAS CHEMICAL CO8 citations72
US4211882AJul 8, 1980
Process for producing terephthalic acid
MITSUBISHI GAS CHEMICAL CO15 citations71
US5189209AFeb 23, 1993
Process for producing highly pure isophthalic acid
MITSUBISHI GAS CHEMICAL CO11 citations68
US4214100AJul 22, 1980
Process for preventing blackening of phthalic acid
MITSUBISHI GAS CHEMICAL CO3 citations60