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Refining agent for synthesizing dioctyl sebacate and preparation method for dioctyl sebacate

A technology of ethylhexyl ester and refined preparation, which is applied in the field of organic compound preparation, can solve the problems of undiscovered patent documents, difficulty in reducing costs, unfavorable economic benefits, etc., and achieve the effects of easy procurement, reduced production costs, and improved production efficiency

Inactive Publication Date: 2011-11-23
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-2-ethylhexyl sebacate is direct esterification reaction, the color of the obtained product is yellow, it is difficult to sell as a product, and it must be further refined, that is, to carry out a decompression refining treatment step, this type of preparation method exists Problems: (1) Since an expensive high-vacuum pump needs to be used in the decompression refining treatment step, this method has the problems of many production equipment and high cost, so it is difficult to reduce the cost; (2) due to the decompression refining treatment Step is an indispensable and very time-consuming production step in the process of producing di-2-ethylhexyl sebacate. 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

[0026] A kind of refined preparation, described refined preparation is mixed by potassium carbonate, magnesium hydroxide, gac, magnesium sulfate,

[0027] Its preparation method is:

[0028] Potassium carbonate, magnesium hydroxide, activated carbon, and magnesium sulfate are uniformly mixed, and the weight ratio is 1:1:2:1.5, and the total weight is 0.5 kg.

[0029] A preparation method of di-2-ethylhexyl sebacate, the steps are:

[0030] (1) Esterification step: to one with heating unit, electric stirring, drop into 100 kilograms of sebacic acid successively in 300 liters of reactors of thermometer water circulation condenser and vacuum oil-water separator, 160 kilograms of 2-ethylhexanols, Concentrated sulfuric acid 0.3 kg, under stirring, micro-vacuum, heating to boiling reaction at the same time, keep boiling reflux state, continuously separate water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

...

Embodiment 2

[0036] A kind of refined preparation, described refined preparation is mixed by potassium carbonate, magnesium hydroxide, gac, magnesium sulfate,

[0037] Its preparation method is:

[0038] Potassium carbonate, magnesium hydroxide, activated carbon, and magnesium sulfate are uniformly mixed, and the weight ratio is 1:1:2:1.5, and the total weight is 0.6 kg.

[0039] A preparation method of di-2-ethylhexyl sebacate, the steps are:

[0040] (1) Esterification step: to one with heating unit, electric stirring, drop into 100 kilograms of sebacic acid successively in 300 liters of reactors of thermometer water circulation condenser and vacuum oil-water separator, 160 kilograms of 2-ethylhexanols, Concentrated sulfuric acid 0.3 kg, under stirring, micro-vacuum, heating to boiling reaction at the same time, keep boiling reflux state, continuously separate water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

...

Embodiment 3

[0046] A kind of refined preparation, described refined preparation is mixed by potassium carbonate, magnesium hydroxide, gac, magnesium sulfate,

[0047] Its preparation method is:

[0048] Potassium carbonate, magnesium hydroxide, activated carbon, and magnesium sulfate are uniformly mixed, and the weight ratio is 1:1:2:1.5, and the total weight is 0.7 kg.

[0049] A preparation method of di-2-ethylhexyl sebacate, the steps are:

[0050] (1) Esterification step: to one with heating unit, electric stirring, drop into 100 kilograms of sebacic acid successively in 300 liters of reactors of thermometer water circulation condenser and vacuum oil-water separator, 160 kilograms of 2-ethylhexanols, Concentrated sulfuric acid 0.3 kg, under stirring, micro-vacuum, heating to boiling reaction at the same time, keep boiling reflux state, continuously separate water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

...

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Abstract

The invention relates to a refining agent for synthesizing dioctyl sebacate and a preparation method for the dioctyl sebacate. The method for synthesizing the dioctyl sebacate comprises esterification, washing, dealcholization, refining and filtration, wherein in the refining step, the refining agent is prepared by mixing potassium carbonate, magnesium hydroxide, active carbon and magnesium sulfate in a certain proportion. By the invention, the industrial production is facilitated and the production efficiency is improved; and a high vacuum refining step is saved during production, and the input of high vacuum pump equipment is absent, so the equipment investment is saved, the production cost is reduced and the market competitiveness of the product is improved; the refining agent is prepared by mixing the potassium carbonate, the magnesium hydroxide, the active carbon and the magnesium sulfate in a proportion, the components have the characteristics of low prices and capacity of being easily purchased; meanwhile, the product quality and long-term storage stability are ensured; and the preparation method is easy and convenient to implement, 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-2-ethylhexyl sebacate and a preparation method thereof. Background technique [0002] Di-2-ethylhexyl sebacate, colorless or light yellow transparent viscous liquid, soluble in ethanol, ether, acetone and chloroform, insoluble in water. Commonly used in biochemical research, toughening agent, plasticizer and jet engine grease (oil). [0003] In the plastic industry and military production, di-2-ethylhexyl sebacate has been widely used as an important organic compound and cold-resistant plasticizer. The usual production method of di-2-ethylhexyl sebacate is direct esterification reaction, the color of the obtained product is yellow, it is difficult to sell as a product, and it must be further refined, that is, to carry out a decompression refining treatment step, this type of preparation method exists Problems: (1) Since an ex...

Claims

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Application Information

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