Simultaneously the by product of 3, 4-xylenol with a purity of over 95% is obtained through filtration and crystallization.
英
美
-
試驗表明,通過(guò)一次精餾生產(chǎn)質(zhì)量分數>95%25的產(chǎn)品,在精餾分離3,5-二甲酚的同時(shí),經(jīng)結晶、抽濾還可得到質(zhì)量分數>95%25的3,4-二甲酚產(chǎn)品。
-
国内精品美女A∨在线播放xuan