Preparation of nonaqueous synthesized lead stearate

Abstract

The invention relates to a method for preparing a non-aqueous and synthesized lead stearate salt. The method directly adopts stearic acid and lead oxide as raw materials, with the existence of the low temperature catalyst ethylene bis stearamide and hydrocarbon compounds such as refined high melting-point wax or liquid wax, at temperature of 70 DEG C to 80 DEG C, combination is conducted for 1 hour to 3 hours and the mixture of n-lead stearate and dibasic lead stearate. In the method, products are generated directly through a reaction without water, no acid or alkaline chemical materials needto be added, the products do not need drying and crushing, thus greatly reducing energy consumption and labor strength; no lead containing waste water is generated; and besides, the method has short reaction process, low energy consumption and low investment and reduces work procedures, costs and labor strength.

Description

technical field [0001] The invention relates to plastic and rubber additives. Background technique [0002] Stearate products, such as barium stearate, lead, cadmium, zinc, calcium, etc. are heat stabilizers and light stabilizers for plastics, and can also be used as thickeners for lubricating oils, flatting agents for paints, and drier , plastic release agent, textile polishing agent, etc. [0003] But because the above-mentioned compounds are all difficult to dissolve in water, the double decomposition method is generally adopted during the preparation, that is, at first stearic acid and caustic soda are reacted to generate sodium stearate, and then the sodium stearate produced and the corresponding metal water-soluble salt are utilized Class is carried out metathesis reaction, thereby makes stearate, and its reaction principle is as follows: [0004] [0005] The advantage is that the reaction is easy to carry out and the process is easy to master. But there are fo...

AI Technical Summary

Problems solved by technology

[0006]1. A large amount of alkali and acid are consumed, and the sodium consumed in the reaction is finally converted into sodium salt and released with the waste liquid, which is costly;

[0007]2. The production process will produce a large amount of process saline wastewater, which is about 5 times the weight of the product, which will pollute the environment, especially the production of lead stearate The wastewater discharged during the process not only contains a large amount of inorganic salts, but also causes poison to the human body and organisms;

[0008]3. Energy consumption is very large, and the stearate produced by the reaction contains a large amount of inorganic salts, which needs to be washed with a large amount of water. In the stearate after washing High water content requires centrifugal separation, oven drying, mechanical crushing and other processes;

[0009]4. Lots of equipment, big investment, high labor intensity

Images