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Tri-monomer preparation method capable of reducing waste water production

A production method and production capacity technology, applied in sulfonate preparation, organic chemistry, etc., can solve the problems of low operating cost, low product yield, complex wastewater treatment process, etc., and achieve the effect of optimizing the production process

Active Publication Date: 2014-12-24
WEIFANG WORLD CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The problem to be solved by the present invention is to provide a three-monomer production method that reduces the amount of waste water generated in view of the above deficiencies, which overcomes the large amount of waste water, low product yield, complicated waste water treatment process, and waste water treatment equipment in the current three-monomer production. The defects of large investment and high operating cost; adopting the production method of the present invention has the advantages of small amount of waste water, high product yield, simple waste water treatment process, small investment in waste water treatment equipment, and low operating cost

Method used

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  • Tri-monomer preparation method capable of reducing waste water production
  • Tri-monomer preparation method capable of reducing waste water production
  • Tri-monomer preparation method capable of reducing waste water production

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Experimental program
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Effect test

Embodiment 1

[0057] Embodiment 1, a three-monomer production method for reducing the amount of waste water generation, comprising a sulfonation step, an esterification step, a neutralization step, a separation step, a refining step and a drying step, as follows:

[0058] 1. Sulfonation steps:

[0059] Concentration is the oleum of 63% to add sulfonation kettle, then add silicon dioxide, sodium acetate and isophthalic acid successively, the weight ratio of isophthalic acid, oleum, silicon dioxide, sodium acetate is 1: 0.908:0.006:0.009, use heat transfer oil to adjust the reaction temperature to 155°C, after adding isophthalic acid, close all the feeding valves of the sulfonation tank, continue to react for 6 hours, after the reaction is completed, ventilate to obtain sulfonated material, and sulfonated material put into the esterification kettle;

[0060] The chemical reaction formula is as follows:

[0061] .

[0062] 2. Esterification step

[0063] Cool the sulfonated material in t...

Embodiment 2

[0089] Embodiment 2, a three-monomer production method for reducing the amount of waste water generation, including a sulfonation step, an esterification step, a neutralization step, a separation step, a refining step and a drying step, as follows:

[0090] 0. Sulfonation step

[0091] Concentration is the oleum of 65% to add sulfonation kettle, then add silicon dioxide, sodium acetate and isophthalic acid successively, the weight ratio of isophthalic acid, oleum, silicon dioxide, sodium acetate is 1: 0.899:0.008:0.01, adjust the reaction temperature to 160°C with heat transfer oil, after adding isophthalic acid, close all the feeding valves of the sulfonation tank, and continue the reaction for 5.5 hours. After the reaction is completed, the sulfonated material is obtained by venting, and the sulfonated material is put into the esterification kettle;

[0092] The chemical reaction formula is as follows:

[0093]

[0094] 2. Esterification step

[0095] Cool the sulfona...

Embodiment 3

[0122] Embodiment 3, a three-monomer production method for reducing the amount of waste water generation, comprising a sulfonation step, an esterification step, a neutralization step, a separation step, a refining step and a drying step, as follows:

[0123] 1. Sulfonation step

[0124] Concentration is the oleum of 66% to add sulfonation kettle, then add silicon dioxide, sodium acetate and isophthalic acid successively, the weight ratio of isophthalic acid, oleum, silicon dioxide, sodium acetate is 1: 0.899:0.007:0.012, use heat transfer oil to adjust the reaction temperature to 165°C, after adding isophthalic acid, close all the feeding valves of the sulfonation tank, and continue the reaction for 5.5 hours. After the reaction is completed, the sulfonated material is obtained by venting, and the sulfonated material is put into the esterification kettle;

[0125] The chemical reaction formula is as follows:

[0126]

[0127] 2. Esterification step

[0128] Cool the sulf...

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Abstract

The invention relates to a tri-monomer preparation method capable of reducing waste water production. The method comprises the following steps of: sulfonating, esterifying, neutralizing, separating, refining and drying; adding washing liquid which is 5.5-6.8fold of weight of isophthalic acid to a neutralization kettle; adding sodium carbonate to the neutralization kettle after adding the esterified material to the neutralization kettle, controlling the reaction temperature at 20-30 DEG C; adjusting the PH value to 5.8-7, starting a vacuum jet pump after adding the sodium carbonate; and vacuumizing for 3-4 hours, wherein the vacuum degree of the neutralization kettle is 0.066-0.078MPa, determining the optimal PH value of a neutralization procedure by regulating and controlling the feeding speed of Na2CO3, wherein the content and purity of SIPM (sodium sulfonate) achieve the highest value when the PH value achieves 6.5; the reaction temperature is reduced under a vacuumizing condition; reaction is promoted; side reaction is obviously reduced; and the inherent quality of the product is improved.

Description

technical field [0001] The invention relates to a production method of a three-monomer, in particular to a three-monomer production method capable of effectively reducing the amount of waste water generated, and belongs to the technical field of chemical industry. Background technique [0002] Dimethyl isophthalate-5-sodium sulfonate (commonly known as three monomers, English abbreviation SIPM) is an important third material for the production of cationic dyeable polyester of high temperature and pressure type (CDP) and normal pressure easy dyeing type (ECDP). Monomers play a pivotal role in the dyeing modification of polyester fibers and in the development and production of differentiated products in melt direct spinning production. [0003] Polyester (polyester fiber) has the characteristics of high modulus, high strength elasticity, good shape retention, and is not easy to wrinkle. It is an ideal textile material. However, polyester macromolecules lack functional groups ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C303/32C07C309/58
Inventor 郭学阳张志刚杨荣华赵子周楚希玲刘见齐张亮
Owner WEIFANG WORLD CHEM