申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:US11046634B2
公开(公告)日:2021-06-29
A method for producing a high-purity carboxylic acid ester, the method including bringing a crude carboxylic acid ester that contains anionic impurities and Ag, Al, Au, Ca, Cr, Cu, Fe, K, Mg, Na, Sn, and Zn metal impurities into contact with a cation-exchange resin, followed by bringing the crude carboxylic acid ester into contact with an anion-exchange resin to obtain to provide a high-purity carboxylic acid ester in which the Ag, Al, Au, Ca, Cr, Cu, Fe, K, Mg, Na, Sn, and Zn metal impurity content are each less than 1 ppb and the anionic impurity content is less than 1 ppm.
一种生产高纯度
羧酸酯的方法,该方法包括将含有阴离子杂质和 Ag、Al、Au、Ca、Cr、Cu、Fe、K、Mg、Na、Sn 和 Zn
金属杂质的粗
羧酸酯与阳离子交换
树脂接触、然后将粗
羧酸酯与阴离子交换
树脂接触,以获得高纯度
羧酸酯,其中 Ag、Al、Au、Ca、Cr、Cu、Fe、K、Mg、Na、Sn 和 Zn
金属杂质含量均小于 1 ppb,阴离子杂质含量小于 1 ppm。