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Preparation method of 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 cost reduction, unfavorable economic benefits, long production time and the like, and achieves the effects of reducing production cost, saving investment, and being convenient 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

[0027] The preparation method of butyl octanoate comprises the following steps:

[0028] 1. Esterification reaction steps

[0029] In a 300-liter reaction kettle with heating device, electric stirring, thermometer water circulation condenser and oil-water separator, drop into 100 kilograms of caprylic acid successively, 160 kilograms of butanols, 0.3 kilograms of concentrated sulfuric acid, under stirring, micro-vacuum, heat simultaneously to Boiling reaction, keep the boiling reflux state, continuously separate the water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

[0030] 2. Washing step

[0031] 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.

[0032] 3. Dealcoholization step

[0033] The mixture washed with water was dealcoholized to obtain the crude product, butyl octano...

Embodiment 2

[0039] The preparation method of butyl octanoate comprises the following steps:

[0040] 1. Esterification reaction steps

[0041] In a 300-liter reaction kettle with heating device, electric stirring, thermometer water circulation condenser and oil-water separator, drop into 100 kilograms of caprylic acid successively, 160 kilograms of butanols, 0.3 kilograms of concentrated sulfuric acid, under stirring, micro-vacuum, heat simultaneously to Boiling reaction, keep the boiling reflux state, continuously separate the water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

[0042] 2. Washing step

[0043] 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.

[0044] 3. Dealcoholization step

[0045] The mixture washed with water was dealcoholized to obtain the crude product, butyl octano...

Embodiment 3

[0051] The preparation method of butyl octanoate comprises the following steps:

[0052] 1. Esterification reaction steps

[0053] Add 100 kg of caprylic acid, 160 kg of butanol, and 0.3 kg of concentrated sulfuric acid to a 300-liter reactor with a heating device, electric stirring, thermometer, water circulation condenser, and oil-water separator. Under stirring, micro-vacuum, and heating Until the boiling reaction, keep the boiling reflux state, continuously separate the water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.

[0054] 2. Washing step

[0055] 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.

[0056] 3. Dealcoholization step

[0057] The mixture washed with water was dealcoholized to obtain the crude product, butyl octanoate.

[0058] 4. Refining steps

[0059] ...

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Abstract

The present invention relates to a kind of preparation method of octanoic acid butyl ester, and this method comprises the following steps: (1) esterification reaction step, put octanoic acid, butanol, concentrated sulfuric acid into reaction kettle, stir, heat to boiling reaction, keep boiling reflux state and separate moisture therein; (2) washing step, adding water to the mixture after the esterification reaction, stirring evenly, standing for stratification, and removing the water layer therein; (3) dealcoholization step; (4) refining step, the crude product after dealcoholization Add the refined preparation, stir and refine for one hour; (5) Filtration step. The preparation method of the butyl octanoate has the advantages of convenient operation, simple operation, convenient realization of industrialized production, and improvement of production efficiency.

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): C07C67/08C07C67/48C07C67/62C07C69/24
CPCC07C67/08C07C67/48C07C67/62C07C69/24
Inventor 张富强
Owner TIANJIN CHEM REAGENT RES INST
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