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Continuous condensation technology of trimethylolpropane and di(trimethylolpropane)

A ditrimethylolpropane and trimethylolpropane technology, which is applied in the continuous condensation process of trimethylolpropane and ditrimethylolpropane, can solve the problems of low output and high added value, and achieve a large production load , high utilization rate of equipment and short average residence time of materials

Active Publication Date: 2020-03-13
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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  • Continuous condensation technology of trimethylolpropane and di(trimethylolpropane)

Examples

Experimental program
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 technology of trimethylolpropane and di(trimethylolpropane). The technology comprises the following specific steps: fully filling a continuous reaction heat exchanger with a formaldehyde solution with the mass percent of 37% before feeding, and starting a circulating pump; uniformly feeding n-butyraldehyde and formaldehyde into the continuous reaction heat exchanger strictly according to a strict ratio through an aldehyde mixer, and feeding an alkali and water into the continuous reaction heat exchanger through an alkali mixer according to a strict ratio; continuously feeding the obtained material into a continuous reactor; continuously feeding the obtained material into a continuous neutralization reactor; adding formic acid into the continuous neutralization reactor to neutralize the residual alkali in the material; and separating and refining a condensation solution after the neutralization is finished and a condensation reaction isfinished in order to obtain qualified trimethylolpropane, di(trimethylolpropane)and formate. The continuous condensation technology of a trimethylolpropane and di(trimethylolpropane) condensation liquid has the advantages of low decice investment, high production capacity, low formaldehyde consumption, high di(trimethylolpropane) selection yield and the like.

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 Applications(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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