Metal stearate preparation method

Abstract

The invention discloses a metal stearate preparation method. The method comprises the following steps: stirring stearic acid, sodium hydroxide, calcium carbonate and medium water at a temperature below the melting point of stearic acid under normal pressure for mixing, heating to a temperature 60-70DEG C higher than the melting point of stearic acid in order to carry out a reaction, carrying out dehydration drying on the above obtained product, dispersing, and drying to metal stearate. The preparation method has the following advantages: 1, the reaction is carried out in the water medium with a low temperature under normal pressure, so a simple routine double decomposition process production apparatus can be used, and the color of the finally obtained product is excellent; and 2, no byproducts are generated in the reaction, and no additives are used in the reaction, so the purity of the product is high, a wastewater emission problem does not exist, and the medium water and waste heat can be recovered and reused.

Description

technical field [0001] The present invention relates to a kind of preparation method of metal stearate. Background technique [0002] Metal stearates can be widely used as plastic stabilizers, lubricants, halogen absorbers, grease thickeners, textile waterproofing agents, paint flatting agents, cosmetic powders and tablet release agents, etc. In principle, the basic process method that can be used to prepare metal stearic acid powder comprises: (1) stearic acid (enzyme) saponification-surplus salt metathesis method (abbreviation metathesis method), (2) molten stearic acid (enzyme) metal Oxide (hydroxide or carbonate) neutralization method (often referred to as melting method or direct method), (3) molten stearic acid metal replacement method. The processes based on the previous two methods have been widely used in the industrial production of metal stearates, while the third method has not been industrialized due to the slow reaction speed and the problems of by-product H2 ...

AI Technical Summary

Problems solved by technology

The processes based on the previous two methods have been widely used in the industrial production of metal stearates, while the third method has not been promoted in industry due to the slow reaction speed and the existence of problems such as by-product H2 treatment.