化学除油是利用热碱溶液对油脂的皂化和乳化作用，将零件表面油污除去的过程。碱性溶液包括两部分：一部分是碱性物质，如氢氧化钠、碳酸钠等；另一部分是硅酸钠、乳化剂等表面活性物质。碱性物质的皂化作用除去可皂化油，表面活性剂的乳化作用除去不可皂化油。化学除油具有工艺简单、操作容易、成本低廉、除油液无毒、不易燃等特点。
化学除油：在碱性溶液中借助皂化作用和乳化作用清除制件表面油污的过程。
The chemical oil: in the alkaline solution with the role of saponification and the emulsification cleared surface process of oil parts.
在分析废水中油粒的表面化学性质及浮选剂除油效率基础上，设计出高效浮选剂分子的结构式。
Then It has design molecule structure of floatation agent by analysing the chemical properties of suspending substances in wastewater and the efficiency of removing oil in wastewater.
介绍餐具光亮镀银的全套实用工艺，包括化学抛光、机械抛光、除蜡、除油、镀镍、镀银、以及镀后处理等。
A complete bright silver plating process for deluxe tableware including chemical polishing, mechanical polishing, degreasing, cleaning, nickle plating, silver plating and post-treatment is suggested.
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