The process of treating a product with a solution of caustic soda to remove minor impurities.
用烧碱溶液处理油品以脱除少量杂质的过程。
Sulphate pulp: Alkaline pulp made from wood chips cooked under pressure in a solution of caustic soda and sodium sulphide.
重硫酸盐浆：把木片在苛性钠和硫酸钠溶液内加压蒸煮而成的碱性浆。
The evaporation and crystallization is the key procedure in the preparation of caustic soda, aiming at the removal of NaCl and increasing the concentration of NaOH solution.
隔膜电解法是我国主要烧碱制备方法之一，蒸发结晶系统是以去除电解液中氯化钠等杂质和提高烧碱浓度为主要目的的制烧碱关键工序。
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