Method for preparing lead stearate

Abstract

The invention relates to a method for preparing lead stearate. The lead stearate is prepared from, by weight, 70 parts of lead acetate, 100 parts of stearic acid and 14.8 parts of caustic soda. The preparation method comprises the following steps: mixing, reacting, primary dehydration, water washing, secondary dehydration, drying, grinding and examination. The method has the advantages of high production efficiency, low energy consumption, simple process and high purity.

Description

technical field [0001] The invention belongs to the technical field of stearate preparation, in particular to a preparation method of lead stearate. Background technique [0002] At present, the domestic production of stearate generally uses stearic acid and corresponding water-soluble metal salts as raw materials to prepare stearate through neutralization reaction and metathesis reaction, that is, the traditional metathesis production process. Including two-step reaction, the first step is neutralization reaction, and the second step is metathesis reaction. This method reacts in water medium. Due to the large gelatinization energy of sodium soap, the solubility is small, the solution is thick, and it is easy to combine with stearic acid to form acidity. Soap is also easily salted out. To obtain pure stearate, the reaction must be carried out at a slow speed under quite diluted conditions. The reaction vessel is large, the production efficiency is low, and the energy consump...

AI Technical Summary

Problems solved by technology

[0002] At present, the domestic production of stearate generally uses stearic acid and corresponding water-soluble metal salts as raw materials to prepare stearate through neutralization reaction and metathesis reaction, that is, the traditional metathesis production process. Including two-step reaction, the first step is neutralization reaction, and the second step is metathesis reaction. This method reacts in water medium. Due to the large gelatinization energy of sodium soap, the solubility is small, the solution is thick, and it is easy to combine with stearic acid to form acidity. Soap is also easily salted out. To obtain pure stearate, the reaction must be carried out at a slow speed under quite diluted conditions. The reaction vessel is large, the production efficiency is low, and the energy consumption and water consumption are high. For this problem, the The synthesis process of stearate has been systematically studied. According to the research experience of domestic scholars, in actual production, the feeding method has been changed through experiments, and the traditional metathesis method has been improved on the basis of previous research. One-step reaction process using different raw materials (metal salts, metal oxides, metal hydroxides) and applied in actual production, resulting in good production benefits