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Method for treating hydrolyzed waste water and recovering resource in disperse blue production process

A production process, resource recovery technology, applied in 2 fields

Inactive Publication Date: 2009-09-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The result of literature search shows: before the present invention is completed, do not see the record of the hydrolysis waste water treatment and resource recycling of discharge in the disperse blue 2BLN production process

Method used

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  • Method for treating hydrolyzed waste water and recovering resource in disperse blue production process
  • Method for treating hydrolyzed waste water and recovering resource in disperse blue production process
  • Method for treating hydrolyzed waste water and recovering resource in disperse blue production process

Examples

Experimental program
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Effect test

example 1

[0029] Example 1: 30 mL (about 22.5 grams) of NDA-150 macroporous adsorption resin was loaded into a jacketed glass adsorption column (Φ20×250 mm). The hydrolysis wastewater (COD) produced in the production process of 600mL disperse blue 2BLN cr 54160mg / L, 2,4-dinitrophenol content is 44395mg / L) with concentrated sulfuric acid to adjust pH=3.0 and then filter, after the filter cake is dried, 26.2 grams of 2,4-dinitrophenol yellow-brown solid can be recovered, The purity reaches 94.2%. Filtrate COD cr The content of 2,4-dinitrophenol is 10202mg / L, and the content of 2,4-dinitrophenol is 2224mg / L. Pass it through the resin bed at a flow rate of 90mL / h at 25±5°C, and the processing capacity is 600mL / batch. After resin treatment, The color of the effluent is light red, the content of 2,4-dinitrophenol is 0.4mg / L, COD cr Dropped to 3361mg / L.

[0030] Use 60mL of 8% (mass ratio) sodium hydroxide, 60mL of 4% sodium hydroxide and 60mL of water successively at a temperature of 80±5...

example 2

[0031] Example 2: 100 mL (about 75 grams) of NDA-150 macroporous adsorption resin was loaded into a jacketed glass adsorption column (F32×360 mm). The hydrolysis wastewater (COD) produced in the production process of 2000mL disperse blue 2BLN cr 54317mg / L, 2,4-dinitrophenol content is 44518mg / L,) adjust pH=2 with concentrated sulfuric acid and filter, after the filter cake is dried, 87.5 grams of 2,4-dinitrophenol yellow-brown solid can be recovered , the purity reaches 93.7%. Filtrate COD cr Reduced to 10992mg / L, 2,4-dinitrophenol content was 2547mg / L, the filtrate passed through the resin bed at a flow rate of 150mL / h at 30±5°C, and the treatment capacity was 2000mL / batch. After resin treatment, The color of the effluent is light red, the content of 2,4-dinitrophenol is 0.43mg / L, COD cr Dropped to 3435mg / L.

[0032]Use 200mL 8% (mass ratio) sodium hydroxide, 200mL 4% sodium hydroxide and 200mL water successively at a temperature of 80±5°C to flow through the resin bed at...

example 3

[0033] Example 3: Choose three 316L stainless steel adsorption towers (F600×3500mm) with the same specifications, and fill each tower with 300 kg (about 400 L) of NDA-150 macroporous adsorption resin. will be 8m 3 Hydrolysis wastewater (COD) produced during the production of disperse blue 2BLN cr 54826mg / L, 2,4-dinitrophenol content is 44520mg / L) adjust pH=2.5 with concentrated sulfuric acid and filter, after the filter cake is dried, reclaim yellow-brown 2,4-dinitrophenol solid 348.2 kilograms, The purity reaches 93.5%. Filtrate COD cr Reduced to 11126mg / L, 2,4-dinitrophenol content was 2270mg / L, the filtrate was at 15±5℃, with 0.4m 3 The flow rate of / h is pumped into the adsorption tower, and the adsorption adopts the method of I and II towers in series and downstream adsorption, and the processing capacity is 8m 3 / batch, after resin treatment, the effluent is nearly colorless, the content of 2,4-dinitrophenol is 0.08mg / L, COD cr Dropped to 1375mg / L.

[0034] will a...

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Abstract

The invention provides a method for treating hydrolyzed waste water and recovering resource in a disperse blue production process, which comprises the following steps that: A) the pH value of the hydrolyzed waste water in the disperse blue production process is adjusted to between 2 and 3, the waste water is filtered, and filter cakes are dried to obtain a crude product 2,4-dinitrophenol of which the purity reaches more than 93.5 percent; B) filter liquor passes through an adsorption tower filled with styrene macroporous absorbent resin under the conditions that the temperature is between 10 and 50 DEG C and the flow rate is between 0.5 and 4.0 BV / h (BV is resin bed volume); C) 4 to 8 mass percent sodium hydroxide and water are taken as desorption agents to desorb and regenerate the macroporous absorbent resin adsorbed with the 2,4-dinitrophenol, the desorption temperature is between 40 and 90 DEG C, and the flow rate of the desorption agent is between 0.5 and 2.0 BV / h; and D) the pH of a desorbed eluent is adjusted to between 2 and 3 by 98 percent sulfuric acid, the eluent is filtered and dried, the crude product 2,4-dinitrophenol is recovered, the purity of the crude product 2,4-dinitrophenol reaches more than 93 percent, and the filter liquor of the eluent in the batch and eluent obtained in step C) in the next batch undergo cyclic operation of step D) together.

Description

1. Technical field [0001] The present invention relates to a method for the treatment and resource recovery of waste water produced in the production process of anthraquinone type disperse dye (2BLN), specifically, the method for the recovery of 2,4-dinitrophenol in the hydrolyzed waste water discharged during the production process of disperse blue 2BLN. Enrichment separation and resource recovery methods. 2. Background technology [0002] Disperse blue 2BLN (1,5-dihydroxy-4,8-diaminoanthraquinone bromide) is an important disperse dye widely used in the dyeing of polyester fiber and its blended fabrics. my country is a big producer of disperse blue 2BLN. The current annual output is about 4500t. The production process is basically the phenoxylation route, using anthraquinone as the raw material to produce disperse blue 2BLN through nitration, phenol substitution, hydrolysis, reduction and bromination. Blue 2BLN. To produce one ton of disperse blue 2BLN products, about 2 to...

Claims

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Application Information

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IPC IPC(8): C02F9/04C07C205/23C07C201/16C02F1/66C02F1/28C02F103/36
Inventor 孙越高姣崔巍张国军李富果韩玲
Owner SOUTHEAST UNIV
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