Method for preparing butyl stearate

A technology of butyl stearate and stearic acid, which is applied in the field of preparation of butyl stearate, can solve the problems of elongated production cycle, low production efficiency, and increased cost of production enterprises, so as to avoid equipment investment and save Equipment investment, the effect of reducing production costs

Inactive Publication Date: 2010-12-01
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production method of butyl stearate is to directly carry out the esterification reaction, there is no relevant follow-up refining step, the color of the obtained product is dark, it is difficult to be sold as a product, and further refining must be carried out, that is, a decompression refining treatment step is carried out. The problems in the preparation method are: 1. The price of the high vacuum pump used in the decompression refining treatment step is relatively high, which virtually increases the cost of the production enterprise, resulting in an increase in the finished product; 2. Since the decompression refining treatment step is a production It is essential in the process of butyl stearate. The time required for this step is longer, which will lengthen the entire production cycle and reduce 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

[0025] A preparation method for butyl stearate, the steps are as follows:

[0026] (1) Esterification reaction step

[0027] Put 100 kg of stearic acid, 65 kg of butanol, and 0.1 kg of concentrated sulfuric acid into a 200-liter reactor with heating device, electric stirring, thermometer, water circulation condenser and oil-water separator, and heat to boiling reaction while stirring , 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;

[0028] Wherein: stearic acid: n-butanol: the weight ratio of concentrated sulfuric acid is 1: 0.65: 0.001-0.005.

[0029] (2) Washing step

[0030] Add 50 kilograms of water to the mixed solution obtained after the esterification reaction, stir evenly, let stand to separate layers, and remove the water layer therein;

[0031] Wherein: the weight ratio of water and stearic acid is 0.5: 1.

[0032] (3) distillati...

Embodiment 2

[0039] A preparation method for butyl stearate, the steps are as follows:

[0040] (1) Esterification reaction step

[0041] Put 100 kg of stearic acid, 65 kg of butanol, and 0.1 kg of concentrated sulfuric acid into a 200-liter reactor with heating device, electric stirring, thermometer, water circulation condenser and oil-water separator, and heat to boiling reaction while stirring , 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 kilograms of water to the mixed solution obtained after the esterification reaction, stir evenly, let stand to separate layers, and remove the water layer therein;

[0044] (3) distillation desolventization step

[0045] The mixture washed with water was distilled to remove excess butanol, the distillation temperature was 110-120°C and the vacuum degree was 10±2mmHg), and ...

Embodiment 3

[0049] A preparation method for butyl stearate, the steps are as follows:

[0050] (1) Esterification reaction step

[0051] Put 100 kg of stearic acid, 65 kg of butanol, and 0.1 kg of concentrated sulfuric acid into a 200-liter reactor with heating device, electric stirring, thermometer, water circulation condenser and oil-water separator, and heat to boiling reaction while stirring , 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;

[0052] (2) Washing step

[0053] Add 50 kilograms of water to the mixed solution obtained after the esterification reaction, stir evenly, let stand to separate layers, and remove the water layer therein;

[0054] (3) distillation desolventization step

[0055] The mixture washed with water was distilled to remove excess butanol, the distillation temperature was 110-120°C and the vacuum degree was 10±2mmHg), and ...

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PUM

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Abstract

The invention relates to a method for preparing butyl stearate, which comprises the following steps of: adding stearic acid, butanol and concentrated sulfuric acid into a reaction kettle in turn, heating for boiling reaction with stirring, keeping the boiling reflux state, continuously separating water out of an oil-water separator until water is not generated, stopping heating, terminating esterification; performing water washing; distilling to remove a solvent; and refining to obtain liquid, namely the butyl stearate finished product. The preparation method saves a high vacuum refining step during production, avoids the investment of high vacuum pump equipment, saves equipment investment, reduces production cost, shortens the whole production period, improves production efficiency, and is suitable for implementing the whole scheme in industrial production.

Description

technical field [0001] The invention belongs to the field of lubricants, in particular to a preparation method of butyl stearate. Background technique [0002] In industrial production, especially in the production of plastics industry, butyl stearate is used more and more widely as an important organic compound, and is widely used as an internal lubricant in transparent PVC products. At present, the production method of butyl stearate is to directly carry out esterification reaction, there is no relevant follow-up refining step, the color that obtains product is dark, is difficult to sell as product, must carry out further refining, promptly carry out decompression refining treatment step, this type The problems in the preparation method are: 1. The price of the high vacuum pump used in the decompression refining treatment step is relatively high, which virtually increases the cost of the production enterprise, resulting in an increase in the finished product; 2. Since the ...

Claims

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Application Information

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