Preparation and purification method of butyl stearate

Abstract

The invention relates to preparation and a purification method of butyl stearate. The preparation comprises the following steps of: putting stearic acid, butanol and concentrated sulfuric acid into a reaction kettle in turn; stirring and simultaneously heating to boiling reaction; keeping a boiling reflux state and continuously separating water out of an oil-water separator till water is not generated; stopping heating to terminate esterification reaction; washing; distilling for removing a solvent; and refining to obtain liquid, namely the finished product of the butyl stearate. By saving a high-vacuum refining step in the production process, the preparation method has the advantages of avoiding using a high-vacuum pump, saving equipment investment, reducing production cost, shortening the whole production cycle, improving production efficiency, and contributing to the realization of industrial production of the whole scheme.

Description

technical field [0001] The invention belongs to the field of lubricants, in particular to a method for preparing and refining butyl stearate. Background technique [0002] In industrial production, especially in the production of plastics industry, butyl stearate is used more and more widely as an important organic compound, and is widely used as an internal lubricant in transparent PVC products. At present, the production method of butyl stearate is to directly carry out esterification reaction, there is no relevant follow-up refining step, the color that obtains product is dark, is difficult to sell as product, must carry out further refining, promptly carry out decompression refining treatment step, this type The problems in the preparation method are: 1. The price of the high vacuum pump used in the decompression refining treatment step is relatively high, which virtually increases the cost of the production enterprise, resulting in an increase in the finished product; 2...

AI Technical Summary

Problems solved by technology

At present, the production method of butyl stearate is to directly carry out the esterification reaction, there is no relevant follow-up refining step, the color of the obtained product is dark, it is difficult to be sold as a product, and further refining must be carried out, that is, a decompression refining treatment step is carried out. The problems in the preparation method are: 1. The price of the high vacuum pump used in the decompression refining treatment step is relatively high, which virtually increases the cost of the production enterprise, resulting in an increase in the finished product; 2. Since the decompression refining treatment step is a production It is essential in the process of butyl stearate. The time required for this step is longer, which will lengthen the entire production cycle and reduce production efficiency, which is not conducive to the improvement of economic benefits of enterprises.