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

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

Example Embodiment

[0029] Example 1

[0030] With structural formula (1)

[0031]

[0032] As an example, put the pretreated 50kg crude dye reaction solution containing 10kg dye and 20kg 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 reactant 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 while the brine was permeated. After 9 hours, 220kg of brine was permeated. Then, the water was stopped and the processed dye was concentrated to 40kg to obtain the following dye components:

[0039] ...

Example Embodiment

[0054]Example 2

[0055] For the dye of formula (3) (C.I.. Reactive Brilliant Blue 19), the pretreated 10kg crude dye reaction solution containing 1.43kg dye and the second-stage membrane recovery solution 4kg, the composition of the mixed solution is as follows:

[0056]

[0057] Dye 10.3%

[0058] Sodium sulfate 3.2%

[0059] Side reactant 0.4%

[0060] Water 86.1%

[0061] The above-mentioned 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 , The operating pressure is 1.0MPa, and the operating temperature is 25°C. During the operation, deionized water was added while the brine was leaked, and then the water was stopped and concentrated to 6kg. After 4.5 hours, 54kg of brine was leaked, and the following dye components were obtained:

[0062] Dye 23.7%

[0063] Sodium sulfate 0.15%

[0064...

Example Embodiment

[0072] Example 3

[0073] Fluorescent brightener of formula (4)

[0074]

[0075] Its components are as follows:

[0076] Fluorescent brightener 1.2%

[0077] Sodium chloride 2.0%

[0078] Side reactant 0.2%

[0079] Water 96.6%

[0080] Put 4060 g of the pretreated reaction aqueous solution containing 48 g of fluorescent whitening agent 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 , The operating pressure is 1.0MPa, and the operating temperature is 30°C. After 6 hours, 3800g of brine was leaked out to obtain 200g, the composition of which is as follows:

[0081] Fluorescent brightener 24.00%

[0082] Sodium chloride 0.3%

[0083] Side reactants 0.03%

[0084] Water 75.67%

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

[0086] The fluorescent whitening agent suspension treated by the method of the present invention not only r...

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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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