Use of solid raw materials in the process of grease

In the manufacturing process of grease, stearic acid, lithium hydroxide and other solid raw materials are used. Solid raw materials such as stearic acid used for saponification of contactor shall be flake or powder solid raw materials to speed up the melting speed of solid materials and prevent damage to stirring paddle. Stearic acid can also be melted and liquid material can be added to the contactor to shorten the melting and heating time of the solid material.

When saponification with contactors, there is no need to dissolve alkaline substances such as LiOH and NaOH in water to make alkaline solution, and there is no need to make lime milk. Powdered or small granular alkaline material and a certain amount of water can be directly into the contactor. When adding too much water, the reaction will produce a lot of water vapor, resulting in high pressure, so in order to control the working pressure inside the contactor, it is necessary to continuously release pressure. This not only wastes a lot of heat energy, but also makes saponification time longer, which is not economical or safe.

The amount of water added varies according to the type of fat being produced. For example, to produce lithium fats, only 0.5% of the amount of water is added. Or, without adding water, the saponification reaction is completed by using the crystal water contained in LiOH.H2O to cause action. In the production of calcium fat, usually only twice the amount of Ca (OH) is added as water. For saponification of neutral fatty acids and CaO, five times the amount of water and CaO should be added in order to effectively complete the saponification reaction.