chemical purification

常見(jiàn)例句

Nuclear pure natural flake graphite has been obtained by chemical purification process.
用化學(xué)提純工藝制出了核純天然石墨粉；
Answer: want first choice, remaking sand, through the magnetic separation, flotation or chemical purification, silica be 95 percent.
答：先要精選，再制砂後，經(jīng)磁選、浮選或化學(xué)提純後，二氧化矽能達(dá)到95%。
The investment and purification cost of chemical purification method is considered lower in producing feed grade, industrial grade, food grade phosphate by using WPA;
認(rèn)爲(wèi)，用溼法磷酸制飼料級(jí)、工業(yè)級(jí)和食品級(jí)磷酸鹽産品，採(cǎi)用新化學(xué)淨(jìng)化溼法磷酸投資少，淨(jìng)化成本低；