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Technical measures for stabilizing esterification reaction

A technical measure, the technology of esterification reaction, applied in the field of stable reaction, can solve the problems of difficult control, unstable polyester technical indicators, affecting the product quality of fiber production line, etc., to achieve the effect of stable esterification reaction and stable quality

Inactive Publication Date: 2008-03-19
JIANGSU SHENGHONG CHEM FIBRE CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, in the whole process of polyester fiber production, the esterification reaction is the leader of the whole production, and in the current polyester production technology, there will always be obvious fluctuations in the esterification reaction, because the leader is not Stable din, resulting in various technical indicators of polyester are also unstable and difficult to control, affecting the product quality of the entire fiber production line

Method used

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Experimental program
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Effect test

Embodiment Construction

[0007] In actual production, the design capacity of the esterification reactor is 95% and the production is the best. According to the generally small average particle size distribution of the purchased raw material PTA, the reaction temperature is lowered, otherwise, the reaction temperature is increased to fine-tune the esterification temperature and time process parameters. To reach the appropriate, far away from the critical point of the process, under the condition of satisfying the reaction molar ratio n(PTA) / n(EG), EG takes the lowest value as much as possible, the reaction liquid level meets the minimum liquid level under the premise of load requirements, and the reaction temperature Optimizing the ratio with the liquid level and compensating each other. If there is a violent fluctuation, the central control will immediately manually control the injection amount of the slurry to reduce the injection amount of the slurry. After the reaction is stable, gradually increase t...

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Abstract

The invention relates to a technical measure for stablizing the esterification reaction and the quality of polyester fiber. Firstly, esterification temperature is finely regulated according to the PTA average particle size, and if the distribution of the PTA particle size is generally low, then reaction temperature is decreased, otherwise the reaction temperature is increased; secondly, the proportion of n (PTA) / n (EG) is controlled, and the value of EG can be selected as low as possible provided the molar ratio of reaction is met; thirdly, the design capability of the esterification reaction is optimally ninety five percent of production rate; fourthly, the level of reaction liquid is selected as low as possible provided load requirement is met; fifthly, reaction temperature and liquid level are optimally proportioned and mutually compensated; sixthly, if acute fluctuation occurs, the central control manually lowers the injection volume of slurry, which is then slowly increased after the reaction is smooth, process parameters are regulated, the liquid level is lowered, temperature is properly raised, the proportion of n (PTA) / n (EG) is regulated, and the amount of EG is slightly decreased; seventhly, the normal process and temperature operation of an EG / H2O separation column is maintained, and the temperature of circulating water is regularly lowered.

Description

technical field [0001] The invention relates to a method for stabilizing the reaction, especially a technical measure for stabilizing the esterification reaction. Background technique [0002] As we all know, in the whole process of polyester fiber production, the esterification reaction is the leader of the whole production, and in the current polyester production technology, there will always be obvious fluctuations in the esterification reaction, because the leader is not Stable din, resulting in various polyester technical indicators are also unstable and difficult to control, affecting the product quality of the entire fiber production line. Contents of the invention [0003] The task of the present invention is: provide a kind of technical measure of stabilizing the esterification reaction, to stabilize the esterification reaction, stabilize the quality of polyester fiber. [0004] Main technical structure of the present invention: [0005] The present invention is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/78
Inventor 刘方
Owner JIANGSU SHENGHONG CHEM FIBRE CO LTD