bleaching earth

Spent bleaching earth is a kind of by-product in an oil-fat plant and it contains 20% to 40% of oil.

废白土是油脂加工厂的一种副产品，其中含有20%～40%的油脂。

Dimer acids was synthesized from soybean oil fatty acid by granular activated bleaching earth. The influence factors on the yield of the reaction, such as the amount of catalyst, reaction temperature and reaction time were investigated.

以粒状活性白土为催化剂，对大豆油脂肪酸为原料催化合成二聚酸进行了研究，考察了催化剂、反应温度、时间等因素对反应的影响。

If using 6# Solvent to extract the oil from the Used Bleaching Earth, we can reduce the balance oil content from 28% to 1.8%.

采用6溶剂油浸提废白土中的油脂，可使废白土中的残油从28%降至18%。

Function of Bleaching Earth Adsorption and Deodorization in Refining Processing

白土吸附和脱臭工艺在精炼过程中的作用

In the refining process of oils, 2%~ 5% activated bleaching earth usually is used. If the spent bleaching earth can not be treated in time, it will pollute the environment.

油脂精炼过程中，通常使用油重2%～5%的活性白土进行吸附脱色，脱色后的废白土若处理不及时，会造成环境污染。

Synthesis of Dimer Acids by Granular Activated Bleaching Earth

粒状活性白土催化合成二聚酸的研究

The author introduces the methods of oil recovering from spent bleaching earth, regeneration of spent bleaching earth and household cleanser producing by using spent bleaching earth.

作者介绍了从废白土中回收油脂，废白土的再生及用度白土制取去污粉的方法。