Method for preparing rare earth dilaurate

Abstract

The invention relates to a preparation method of dilaurate rare earth, belonging to the technical field of chemical synthesis. Under normal pressure, dilaurate, lanthanum hydroxide and medium water are stirred and mixed below the melting point of dilaurate; then the mixture is heated above the melting point of dilaurate for reaction; the product is dehydrated, dispersed and dried, and dilaurate rare earth is obtained; and the medium water can be recycled to avoid waste water discharge. The preparation method has the advantages of high productivity and obvious reduction of energy consumption and water consumption.

Description

technical field [0001] The invention relates to a preparation method of rare earth dilaurate, which belongs to the technical field of chemical synthesis. Background technique [0002] Rare earth dilaurate can be used as plastic stabilizer, lubricant, halogen absorber, cosmetic additive, etc. However, the current method for preparing rare earth dilauric acid is saponification of dilauric acid-lanthanum chloride double decomposition method. However, the double decomposition method has the following disadvantages: [0003] (1) Since the saponification metathesis reaction must be carried out at a slow rate under a relatively dilute reaction slurry condition, this leads to the disadvantages of large container equipment, low production efficiency, and high energy and water consumption in the metathesis process. [0004] (2) Due to the liquid-solid ratio of the reaction material with high reaction requirements, a large amount of water needs to be consumed for washing. Therefore, ...

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Problems solved by technology

[0003] (1) Since the saponification metathesis reaction must be carried out at a slow speed under the condition of a relatively dilute reaction slurry, this leads to the disadvantages of large container equipment, low production efficiency, high energy consumption and water consumption in the metathesis process

[0004] (2) Due to the liquid-solid ratio of the reaction material with high reaction requirements, a large amount of water needs to be consumed for washing. Therefore, the metathesis process discharges a large amount of salty and organic waste water, which will pollute the environment and cause adverse effects. people's attention

[0005] (3) Saponification-lanthanum chloride double decomposition reaction has high water content in the filter cake and high energy consumption for drying