Method for preparing butyl caprylate

A technology of butyl caprylate and caprylic acid, which is applied in the field of organic compound preparation, can solve the problems of difficulty in reducing costs, unfavorable economic benefits, and many production equipment, and achieves the effects of reducing production costs, saving investment, and being easy to operate.

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 butyl octanoate is direct esterification, 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 reduction of In the process of pressing and refining, an expensive high-vacuum pump is required, so this method has many production facilities and high costs, making it difficult to reduce costs
2. Since the decompression refining treatment step is an indispensable and time-consuming production step in the production of butyl octanoate, 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The method for preparing butyl octanoate comprises the following steps:

[0029] 1. Esterification reaction steps

[0030] To a heating device, electric stirring, thermometer, water circulation condenser and oil-water separation

[0031] Put 100 kg of caprylic acid, 160 kg of butanol, and 0.3 kg of concentrated sulfuric acid into the 300-liter reactor of the reactor in turn. Under stirring, under a slight vacuum, heat to boiling reaction at the same time, keep boiling and reflux, and continuously separate water from the oil-water separator Go out, until no moisture is generated, stop heating, and the esterification reaction is terminated.

[0032] 2. Washing step

[0033] 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.

[0034] 3. Dealcoholization step

[0035] The mixture washed with water was dealcoholized to obtain the crude product, butyl...

Embodiment 2

[0041] The method for preparing butyl octanoate comprises the following steps:

[0042] 1. Esterification reaction steps

[0043] To a heating device, electric stirring, thermometer, water circulation condenser and oil-water separation

[0044] Put 100 kg of caprylic acid, 160 kg of butanol, and 0.3 kg of concentrated sulfuric acid into the 300-liter reactor of the reactor in turn. Under stirring, under a slight vacuum, heat to boiling reaction at the same time, keep boiling and reflux, and continuously separate water from the oil-water separator Go out, until no moisture is generated, stop heating, and the esterification reaction is terminated.

[0045] 2. Washing step

[0046] 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.

[0047] 3. Dealcoholization step

[0048] The mixture washed with water was dealcoholized to obtain the crude product, butyl...

Embodiment 3

[0054] The method for preparing butyl octanoate comprises the following steps:

[0055] 1. Esterification reaction steps

[0056] To a heating device, electric stirring, thermometer, water circulation condenser and oil-water separation

[0057] 100 kg of caprylic acid, 160 kg of butanol, and 0.3 kg of concentrated sulfuric acid are successively put into the 300-liter reactor of the reactor. Under stirring, a slight vacuum is heated to boiling reaction at the same time, and the state of boiling reflux is kept, and water is continuously removed from the oil-water separator. After separation, stop heating until no water is generated, and the esterification reaction is terminated.

[0058] 2. Washing step

[0059] 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.

[0060] 3. Dealcoholization step

[0061] The mixture washed with water was dealcoholized to...

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PUM

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Abstract

The present invention relates to a kind of method for preparing octanoic acid butyl ester, and method comprises the following steps: (1) esterification reaction step, put caprylic acid, butanol, concentrated sulfuric acid into reaction kettle, stir, heat to boiling reaction, keep boiling reflux state and separate among them (2) water washing step, adding water to the mixture after the esterification reaction, stirring evenly, standing for stratification, and removing the water layer; (3) dealcoholization step; (4) refining step, adding the crude product after dealcoholization Refined preparation, stirred and refined for one hour; (5) Filtration step. The refining agent used in the preparation method of butyl octanoate is a mixture of calcium hydroxide, magnesium hydroxide, activated carbon and magnesium sulfate, which has the characteristics of low price and easy procurement.

Description

technical field [0001] The invention belongs to the field of organic compound preparation, in particular to a simple and effective preparation method of butyl octanoate. Background technique [0002] In industrial production, plastics industry and military production, butyl octanoate, as an important organic compound and cold-resistant plasticizer, is more and more widely used. The usual production method of butyl octanoate is direct esterification, 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 reduction of In the pressing and refining process step, an expensive high-vacuum pump is required to realize it. Therefore, this method has the problems of a large number of production equipment and high cost, so it is difficult to reduce the cost. 2. Since the decompression refining trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C67/48C07C67/56C07C69/24
CPCC07C67/08C07C67/48C07C67/56C07C69/24
Inventor 张富强
Owner TIANJIN CHEM REAGENT RES INST
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