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Preparation method of 2-ethylhexyl caprylate

A technology of ethylhexyl ester and ethylhexanol, which is applied in the field of organic compound preparation, can solve the problems of unfavorable economic benefits, difficulty in reducing costs, and low production efficiency, and achieve the effects of reducing production costs, avoiding investment, and convenient operation

Inactive Publication Date: 2018-03-20
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 octanoic acid-2-ethylhexyl 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. 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 cost, so it is difficult to reduce the cost
2: Since the decompression refining treatment step is an indispensable and time-consuming production step in the process of producing octanoic acid-2-ethylhexyl ester, the method has the problems of long production time and low production efficiency, which is not conducive to the economics of the enterprise Benefit improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of this caprylic acid-2-ethylhexyl ester comprises the following steps:

[0029] ⑴Esterification reaction steps

[0030] In a 300 liter reactor with heating device, electric stirring, thermometer water circulation condenser and oil-water separator, drop into 100 kilograms of sebacic acid successively, 160 kilograms of 2-ethylhexanol, 0.3 kilogram of vitriol oil, under stirring, Micro-vacuum, heating to boiling reaction at the same time, keep boiling reflux, and continuously separate water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

[0031] ⑵Washing steps

[0032] Add 50 kg of water to the mixed solution obtained after the esterification reaction, stir evenly, leave to stand and separate the layers, and remove the water layer therein.

[0033] ⑶ dealcoholization step

[0034] The mixture washed with water was dealcoholized to obtain the crude product, octanoic acid-2-et...

Embodiment 2

[0040] The preparation method of this caprylic acid-2-ethylhexyl ester comprises the following steps:

[0041] ⑴Esterification reaction steps

[0042] In a 300 liter reactor with heating device, electric stirring, thermometer water circulation condenser and oil-water separator, drop into 100 kilograms of sebacic acid successively, 160 kilograms of 2-ethylhexanol, 0.3 kilogram of vitriol oil, under stirring, Micro-vacuum, heating to boiling reaction at the same time, keep boiling reflux, and continuously separate water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

[0043] ⑵Washing steps

[0044] Add 50 kg of water to the mixed solution obtained after the esterification reaction, stir evenly, leave to stand and separate the layers, and remove the water layer therein.

[0045] ⑶ dealcoholization step

[0046] The mixture washed with water was dealcoholized to obtain the crude product, octanoic acid-2-et...

Embodiment 3

[0052] The preparation method of this caprylic acid-2-ethylhexyl ester comprises the following steps:

[0053] ⑴Esterification reaction steps

[0054] Add 100 kilograms of sebacic acid, 160 kilograms of 2-ethylhexanol, and 0.3 kilograms of concentrated sulfuric acid to a 300-liter reactor with a heating device, electric stirring, thermometer water circulation condenser and oil-water separator, and stir , micro-vacuum, heating to boiling reaction at the same time, maintaining the state of boiling reflux, continuously separating water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

[0055] ⑵Washing steps

[0056] Add 50 kg of water to the mixed solution obtained after the esterification reaction, stir evenly, leave to stand and separate the layers, and remove the water layer therein.

[0057] ⑶ dealcoholization step

[0058] The mixture washed with water was dealcoholized to obtain the crude product, oct...

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Abstract

The invention relates to a preparation method of 2-ethylhexyl caprylate. The method comprises the following steps: (1) carrying out an esterification reaction step, namely inputting sebacic acid, 2-ethylhexanol and concentrated sulfuric acid into a reaction kettle, stirring the mixture, heating the mixture for a boiling reaction, and keeping the boiling reflux state and separating water therein; (2) carrying out a washing step, namely adding water into the mixture after esterification reaction, uniformly stirring the mixture, standing and layering, and removing a water layer therein; (3) carrying out a dealcoholizing step; and (4) carrying out a filtering step. The refining agent used in the preparation method of 2-ethylhexyl caprylate is a mixture of calcium hydroxide, magnesium hydroxide, activated carbon and magnesium sulfate, and has the characteristics of low price and easiness in purchasing.

Description

technical field [0001] The invention belongs to the field of organic compound preparation, in particular to a simple and effective preparation method of octanoic acid-2-ethylhexyl ester. Background technique [0002] In industrial production, plastics industry and military production, 2-ethylhexyl octanoate, as an important organic compound and cold-resistant plasticizer, has been widely used. The usual production method of octanoic acid-2-ethylhexyl 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. The problems in this type of preparation method : 1: Since an expensive high-vacuum pump needs to be used in the decompression refining treatment step, this method has the problems of a large number of production equipment and high costs, so it is difficult to reduce the cost. 2: Since the decompression refining tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/24C07C67/48C07C67/62C07C69/50
CPCC07C67/08C07C67/48C07C67/62C07C69/24C07C69/50
Inventor 张富强
Owner TIANJIN CHEM REAGENT RES INST
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