Refining agent for synthesizing di-n-butyl sebacate and preparation method thereof

Abstract

The invention relates to a refining agent for synthesizing di-n-butyl sebacate and a preparation method thereof. The method for synthesizing di-n-butyl sebacate comprises the steps of esterification, water washing, dealcoholization, refining and filtration, wherein the refining agent used in the refining step is prepared by mixing potassium carbonate, magnesium hydroxide, activated carbon and magnesium sulfate according to a certain ratio. The invention facilitates the industrial production and improves the production efficiency; as the high-vacuum refining step is omitted in the production process, the investment of high-vacuum pump equipment is avoided, thereby saving the equipment investment, lowering the production cost and improving the market competitiveness of the product; the refining agent is prepared by mixing potassium carbonate, magnesium hydroxide, activated carbon and magnesium sulfate according to a certain ratio, and each component is low in price and easy to purchase; the product quality and long-term storage stability of the product is simultaneously ensured; the preparation method is simple to implement and convenient to operate; and the investment of production equipment is saved, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of organic compound preparation, in particular to a refined preparation for synthesizing di-n-butyl sebacate and a preparation method thereof. Background technique [0002] Di-n-butyl sebacate, colorless clear liquid. Odorless. It can be miscible with ethanol, ether and acetone, etc., but insoluble in water. The freezing point is -11°C. The boiling point is 349°C. Refractive index (n20D) 1.4395. The flash point is 176°C. It can be used as a plasticizer and rubber softener, and is often used in cosmetics, spices and seasonings. [0003] In recent years, in the plastic industry and military production, di-n-butyl sebacate has been used more and more widely as an important organic compound and cold-resistant plasticizer. The usual production method of di-n-butyl sebacate is direct esterification, and the color of the obtained product is yellow, which is difficult to sell as a product, and must be further refined, t...

AI Technical Summary

Problems solved by technology

The usual production method of di-n-butyl sebacate is direct esterification, and the color of the obtained product is yellow, which is difficult to sell as a product, and must be further refined, that is, to carry out a decompression refining treatment step. The problems in this type of preparation method: (1) Due to the need to use expensive high-vacuum pumps in the decompression refining treatment step, this method has the problems of many production equipment and high costs, so it is difficult to reduce the cost; (2) Since the decompression refining treatment step is a production It is an indispensable and time-consuming production step in the di-n-butyl sebacate process. Therefore, the method has the problems of long production time and low production efficiency, which is not conducive to the improvement of economic benefits of enterprises

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