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A kind of preparation method of di-n-butyl sebacate

A technology of di-n-butyl sebacate and sebacic acid, which is applied in the field of organic compound preparation, can solve the problems of undiscovered patent documents, unfavorable economic benefits, and difficulty in reducing costs, and achieves easy procurement, reduced production costs, and simple implementation Effect

Inactive Publication Date: 2011-12-07
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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
[0004] After searching, no patent documents related to this patent were found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of preparation method of di-n-butyl sebacate, its steps are:

[0025] (1) Esterification step: drop into successively 100 kilograms of sebacic acid, 115 kilograms of n-butanols, vitriol oil in 300 liters of reactors with heating device, electric stirring, thermometer water circulation condenser and vacuum oil-water separator 0.3 kg, under stirring, under slight vacuum, heat to boiling reaction at the same time, keep boiling and reflux, continuously separate water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

[0026] (2) Water washing step: add 50 kilograms of water to the mixed solution obtained after the esterification reaction, stir evenly, leave to stand for stratification, and remove the water layer therein.

[0027] (3) Dealcoholization step: dealcoholize the washed mixture to obtain crude di-n-butyl sebacate.

[0028] (4) Refining step: add refining agent (sodium carbonate, calcium ...

Embodiment 2

[0031] A kind of preparation method of di-n-butyl sebacate, its steps are:

[0032] (1) Esterification step: drop into successively 100 kilograms of sebacic acid, 115 kilograms of n-butanols, vitriol oil in 300 liters of reactors with heating device, electric stirring, thermometer water circulation condenser and vacuum oil-water separator 0.3 kg, under stirring, under slight vacuum, heat to boiling reaction at the same time, keep boiling and reflux, continuously separate water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

[0033] (2) Water washing step: add 50 kilograms of water to the mixed solution obtained after the esterification reaction, stir evenly, leave to stand for stratification, and remove the water layer therein.

[0034] (3) Dealcoholization step: dealcoholize the washed mixture to obtain crude di-n-butyl sebacate.

[0035] (4) Refining step: add refining agent (sodium carbonate, calcium ...

Embodiment 3

[0038] A kind of preparation method of di-n-butyl sebacate, its steps are:

[0039] (1) Esterification step: drop into successively 100 kilograms of sebacic acid, 115 kilograms of n-butanols, vitriol oil in 300 liters of reactors with heating device, electric stirring, thermometer water circulation condenser and vacuum oil-water separator 0.3 kg, under stirring, under slight vacuum, heat to boiling reaction at the same time, keep boiling and reflux, continuously separate water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

[0040] (2) Water washing step: add 50 kilograms of water to the mixed solution obtained after the esterification reaction, stir evenly, leave to stand for stratification, and remove the water layer therein.

[0041] (3) Dealcoholization step: dealcoholize the washed mixture to obtain crude di-n-butyl sebacate.

[0042] (4) Refining step: add refining preparation (sodium carbonate, ca...

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Abstract

The invention relates to a preparation method of di-n-butyl sebacate. The method comprises esterification, water washing, dealcoholization, refining and filtration to obtain di-n-butyl sebacate product. In the present invention, a refined preparation is added in the process of preparing di-n-butyl sebacate, so that the obtained product has a lighter color, can be sold as a product without high vacuum refining treatment, and fully meets the requirements of technical indicators, and the present invention is convenient for realizing industrialized production , Improve production efficiency, because the high vacuum refining step is omitted during production, and there is no investment in high vacuum pump equipment, thereby saving equipment investment, reducing production costs, and improving product market competitiveness.

Description

technical field [0001] The invention belongs to the field of organic compound preparation, in particular to a preparation method of di-n-butyl sebacate. 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, that is, a decompression refining treatment step....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/50C07C67/08C07C67/56
Inventor 张富强
Owner TIANJIN CHEM REAGENT RES INST
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