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Water soluble crude dye refining method based on membrane separation and integration technology

A membrane separation and water-soluble technology, applied in the direction of membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of loss, large pore size of the first-stage separation membrane, etc., and achieve the effect of stable performance

Inactive Publication Date: 2005-07-06
SHANGHAI HUAYI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The disadvantage of this method is that the pore size of the first-stage separation membrane is too large, and many dyes dissolved in water will pass through the membrane together with the brine, causing a certain loss

Method used

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  • Water soluble crude dye refining method based on membrane separation and integration technology
  • Water soluble crude dye refining method based on membrane separation and integration technology
  • Water soluble crude dye refining method based on membrane separation and integration technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] With structural formula (1)

[0031]

[0032] For example, put the mixed solution of 50kg of crude dye reaction solution containing 10kg of dye and 20kg of the second-stage membrane recovery solution into the first-stage tubular membrane device for desalination reaction. The components of the mixed solution The ratio is (in mass percentage);

[0033] Dye 14.9%

[0034] Sodium chloride 0.5%

[0035] Sodium Sulfate 1.82%

[0036] Side reactants 0.4%

[0037] Water 82.38%

[0038] The membrane material of the first-stage membrane separation device is polyethersulfone, the molecular weight cut-off of the membrane is 500-10000, and the membrane area is 0.9m 2 , the operating pressure is 1.0MPa, and the operating temperature is 25°C. During the operation, deionized water was added, and salt water leaked out. After 9 hours, 220kg of salt water leaked out, and then the water was stopped, and the treated dye was concentrated to 40 kg, and the following dye components we...

Embodiment 2

[0055] As the dyestuff (C.I.. Reaction Brilliant Blue 19) of formula (3) will pretreated 10kg crude dyestuff reaction liquid containing 1.43kg dyestuff and 4kg of the second stage membrane recovery liquid, the composition of its mixed solution is as follows:

[0056]

[0057] Dye 10.3%

[0058] Sodium Sulfate 3.2%

[0059] Side reactants 0.4%

[0060] Water 86.1%

[0061] The above dye solution is placed in the first-stage tubular membrane device for desalination and concentration operations. The membrane material is polyamide, the molecular weight cut-off of the membrane is 500-10000, and the membrane area is 0.9m 2 , operating pressure 1.0MPa, operating temperature 25 ℃. While adding deionized water during the operation, brine leaked out, then stopped adding water, concentrated to 6kg, after 4.5 hours, 54kg of brine leaked out, and the following dye components were obtained:

[0062] Dye 23.7%

[0063] Sodium sulfate 0.15%

[0064] Side reactants 0.17%

[0065] Wa...

Embodiment 3

[0073] Such as the fluorescent whitening agent of formula (4)

[0074]

[0075] Its components are as follows:

[0076] Fluorescent whitening agent 1.2%

[0077] Sodium Chloride 2.0%

[0078] Side reactants 0.2%

[0079] Water 96.6%

[0080] 4060 g of the pretreated reaction aqueous solution containing 48 g of fluorescent whitening agent was placed in a tubular membrane device. The membrane material is polyethersulfone, the molecular weight cut-off of the membrane is 500-10000, and the membrane area is 0.02m 2 , operating pressure 1.0MPa, operating temperature 30 ℃. After 6 hours, 3800g of salt water was revealed to obtain 200g, and its composition was as follows:

[0081] Fluorescent whitening agent 24.00%

[0082] Sodium chloride 0.3%

[0083] Side reactants 0.03%

[0084] Water 75.67%

[0085] The content of fluorescent whitening agent in the permeate is 0.01%.

[0086] The fluorescent whitening agent suspension treated by the method of the present invention n...

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Abstract

This invention relates to fine water solvent saw dye process method based on membrane isolation integration technique, which processes desalinization on the saw dye and condensation to isolate the inorganic salts like sodium chloride and sodium sulfate in the raw dye to get the purified dye and also makes the membrane process finishing rate more than 99.9 úÑ and to get the further liquid dye for process.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a production method for refining water-soluble crude dyes based on membrane separation and integration technology technical background [0002] Usually, the final synthetic solution of water-soluble dyes exists in the state of aqueous solution or suspension, which contains many inorganic salts, such as monovalent and divalent salts of sodium chloride and sodium sulfate; commercial dyes made by dye factories, even Contains more sodium sulfate. The existence of these inorganic salts not only reduces the purity of the dye, but also reduces the solubility and improvement of the dye, and cannot meet the high concentration and high purity quality requirements of the electronic color matching system of modern printing and dyeing factories. [0003] With the development of membrane separation technology, using nanofiltration membrane to remove sodium chloride in dye s...

Claims

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Application Information

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IPC IPC(8): B01D61/00
Inventor 伍登熙苏鹤祥李光明何毅何扣宝李伟之黄群英赵建夫
Owner SHANGHAI HUAYI GRP CO
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