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A refined preparation for synthesizing di-2-ethylhexyl adipate and its preparation method

A technology of di- and ethylhexyl adipate, which is applied in the field of organic compound preparation, can solve the problems of no patent literature, water resistance, migration resistance, poor electrical insulation, long production time, etc., to ensure long-term storage stability Sexuality, improvement of market competitiveness, and the effect of saving equipment investment

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-2-ethylhexyl adipate is direct esterification reaction, and the color of the product obtained 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. This type of preparation method Existing problems: (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 costs; (2) due to the decompression refining The processing step is an indispensable and time-consuming production step in the process of producing di-2-ethylhexyl adipate. 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
However, it is highly volatile, and has poor water resistance, migration resistance and electrical insulation
[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 refining agent, described refining agent is mixed by calcium hydroxide, magnesium hydroxide, gac, magnesium sulfate,

[0027] Its preparation method is:

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

[0029] A kind of preparation method of adipate di-2-ethylhexyl, its steps are:

[0030] (1) Esterification step: in a 300 liters of reaction stills that have heating unit, electric stirring, thermometer water circulation condenser and vacuum oil-water separator drop into successively 100 kilograms of adipic acid, 220 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.

[0031] ...

Embodiment 2

[0036] A kind of refining agent, described refining agent is mixed by calcium hydroxide, magnesium hydroxide, gac, magnesium sulfate,

[0037] Its preparation method is:

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

[0039] A kind of preparation method of adipate di-2-ethylhexyl, its steps are:

[0040] (1) Esterification step: in a 300 liters of reaction stills that have heating unit, electric stirring, thermometer water circulation condenser and vacuum oil-water separator drop into successively 100 kilograms of adipic acid, 220 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.

[0041] ...

Embodiment 3

[0046] A kind of refining agent, described refining agent is mixed by calcium hydroxide, magnesium hydroxide, gac, magnesium sulfate,

[0047] Its preparation method is:

[0048] Calcium hydroxide, 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 kind of preparation method of adipate di-2-ethylhexyl, its steps are:

[0050] (1) Esterification step: in a 300 liters of reaction stills that have heating unit, electric stirring, thermometer water circulation condenser and vacuum oil-water separator drop into successively 100 kilograms of adipic acid, 220 kilograms of 2-ethylhexanols, 0.3 kg of concentrated sulfuric acid, under stirring, under slight vacuum, heated to boiling reaction at the same time, kept boiling reflux state, continuously separated water from the oil-water separator, until no water was generated, stopped heating, and the esterification reaction was ter...

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Abstract

The present invention relates to a kind of fine preparation and preparation method thereof for synthesizing di-2-ethylhexyl adipate, the method for synthesizing di-2-ethylhexyl adipate comprises esterification, water washing, dealcoholization, Refining and filtering, wherein the refining agent used in the refining step is formed by mixing calcium hydroxide, magnesium hydroxide, activated carbon and magnesium sulfate in a certain proportion. The present invention facilitates the realization of industrialized production and improves production efficiency. Since the high vacuum refining step is omitted during production, and there is no investment in high vacuum pump equipment, equipment investment is saved, production costs are reduced, and the market competitiveness of products is improved. The refined preparation is Calcium hydroxide, magnesium hydroxide, activated carbon, and magnesium sulfate are mixed in proportion. Each component has the characteristics of low price and easy procurement. At the same time, product quality and long-term storage stability are guaranteed. The preparation method is simple and easy to operate. The investment in 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 adipate and a preparation method thereof. Background technique [0002] In the plastic industry and military production, di-2-ethylhexyl adipate is used more and more widely as an important organic compound and cold-resistant plasticizer. The usual production method of di-2-ethylhexyl adipate is direct esterification reaction, and the color of the product obtained 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. This type of preparation method Existing problems: (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 costs; (2) due to the decompression refining The processing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/44C07C67/56C07C67/08
Inventor 张富强
Owner TIANJIN CHEM REAGENT RES INST
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