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A kind of continuous condensation process of trimethylolpropane and ditrimethylolpropane

A technology of ditrimethylolpropane and trimethylolpropane, which is applied in the field of continuous condensation of trimethylolpropane and ditrimethylolpropane, can solve the problems of high added value, low output and the like, and achieves the utilization of equipment. The effect of high rate, high production load and rapid heat removal

Active Publication Date: 2022-05-03
CHIFENG RUIYANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ditrimethylolpropane is widely used, but the output is small and the added value is high

Method used

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  • A kind of continuous condensation process of trimethylolpropane and ditrimethylolpropane

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Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: A kind of continuous condensation process of trimethylolpropane and ditrimethylolpropane.

[0032] Raw material specifications: n-butyraldehyde content 99.5%, formaldehyde content 37%, sodium hydroxide content 32%, water is distilled water.

[0033] Feeding speed: n-butyraldehyde 725 kg / hour, formaldehyde 2386 kg / hour, sodium hydroxide 1500 kg / hour, distilled water 6300 kg / hour.

[0034] The temperature of the continuous reaction heat exchanger is controlled at 35°C, allowing fluctuations of 1°C; the temperature of the continuous reactor is controlled at 40°C, allowing fluctuations of 1°C; the temperature of the continuous neutralization reactor is controlled at 40°C, allowing fluctuations of 1°C ℃; The average residence time of materials in the continuous reaction heat exchanger is 6 minutes, the average residence time of materials in the continuous reactor is 60 minutes, and the average residence time of materials in the continuous neutralization reactor...

Embodiment 2

[0036] Embodiment 2: A continuous condensation process of trimethylolpropane and ditrimethylolpropane.

[0037] Raw material specifications: n-butyraldehyde content 99.5%, formaldehyde content 37%, sodium hydroxide content 32%, water is distilled water.

[0038] Feeding speed: n-butyraldehyde 725 kg / hour, formaldehyde 2435 kg / hour, sodium hydroxide 1500 kg / hour, distilled water 6300 kg / hour.

[0039] The temperature of the continuous reaction heat exchanger is controlled at 35°C, allowing fluctuations of 1°C; the temperature of the continuous reactor is controlled at 50°C, allowing fluctuations of 1°C; the temperature of the continuous neutralization reactor is controlled at 50°C, allowing fluctuations of 1°C °C; the average residence time of the material in the continuous reaction heat exchanger is 6 minutes, the average residence time of the material in the continuous reactor is 45 minutes, and the average residence time of the material in the continuous neutralization react...

Embodiment 3

[0041] Embodiment 3: A continuous condensation process of trimethylolpropane and ditrimethylolpropane.

[0042] Raw material specifications: n-butyraldehyde content 99.5%, formaldehyde content 37%, sodium hydroxide content 32%, water is distilled water.

[0043] Feeding speed: n-butyraldehyde 725 kg / hour, formaldehyde 2597 kg / hour, sodium hydroxide 1500 kg / hour, distilled water 5940 kg / hour.

[0044] The temperature of the continuous reaction heat exchanger is controlled at 35°C, allowing fluctuations of 1°C; the temperature of the continuous reactor is controlled at 55°C, allowing fluctuations of 1°C; the temperature of the continuous neutralization reactor is controlled at 50°C, allowing fluctuations of 1°C ℃; The average residence time of materials in the continuous reaction heat exchanger is 6 minutes, the average residence time of materials in the continuous reactor is 30 minutes, and the average residence time of materials in the continuous neutralization reactor is 10 m...

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Abstract

The invention discloses a continuous condensation process of trimethylolpropane and ditrimethylolpropane. The specific steps are as follows: before feeding, a continuous reaction heat exchanger is filled with a formaldehyde solution whose mass percentage is 37%, and a circulating pump is started; The n-butyraldehyde and formaldehyde are put into the continuous reaction heat exchanger through the aldehyde mixer, the alkali and the water through the alkali mixer in strict accordance with the uniform ratio; then the material is continuously fed into the continuous reactor; then the material is continuously fed into the continuous neutralization reactor Add formic acid to the continuous neutralization reactor to neutralize the residual alkali in the material; the neutralization is completed, the condensation reaction ends, and the condensed liquid is separated and purified to obtain qualified trimethylolpropane and ditrimethylolpropane. and formate. The invention adopts the continuous condensation process to produce the condensed liquid of trimethylolpropane and ditrimethylolpropane, and has the advantages of less equipment investment, large production capacity, low formaldehyde consumption and high selective yield of ditrimethylolpropane.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a continuous condensation process of trimethylolpropane and ditrimethylolpropane. Background technique [0002] Trimethylolpropane (TMP) is one of the few polyol products containing quaternary carbon atoms. It has the advantages of good thermal stability and not easy to decompose. It contains 3 active hydroxyl groups and can form a polyester structure. It is widely used in polymers Material is an important fine chemical product. Trimethylolpropane is a commonly used chain extender in the resin industry. It has a low melting point and can react with organic acids to form monoesters or polyesters, react with aldehydes and ketones to form acetals and ketals, and react with diisocyanates to form carbamates, etc. The products are mainly used in technical fields such as alkyd resin, polyurethane, unsaturated resin, polyester resin or coating, and can also be use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/38C07C31/22C07C31/26
CPCC07C29/38C07C31/26C07C31/22
Inventor 彭枝忠全宏冬刘泉李权
Owner CHIFENG RUIYANG CHEM
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