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Treatment process combining H acid mother solution and T acid mother solution

A treatment process and acid mother technology, applied in the field of H acid production wastewater treatment, to achieve the effect of saving energy and production costs

Pending Publication Date: 2015-12-09
JIANGXI MADE FINE CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, at this stage, many enterprises have no choice but to spray dry the mother liquor of T acid, so that the waste water becomes waste residue

Method used

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  • Treatment process combining H acid mother solution and T acid mother solution
  • Treatment process combining H acid mother solution and T acid mother solution
  • Treatment process combining H acid mother solution and T acid mother solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of processing technology of present embodiment has H acid mother liquor and T acid mother liquor concurrently, combines figure 1 , including the following steps:

[0027] (1) Separation of inorganic salts: After adding an acidic complexing agent to the collected 4000ml wastewater for pretreatment, the aqueous phase obtained by extraction is a salt-containing substance; among them, the acidic complexing agent consists of 500ml trioctyl, decanyl tertiary amine, 400ml sulfonated kerosene, 100ml n-octanol mixed.

[0028] (2) Recovery of inorganic salts: the water phase of step (1) is directly put into the MVR equipment, concentrated and crystallized, and centrifuged to obtain inorganic salts.

[0029] (3) Recovery of organic by-products: Add sodium hydroxide to the extract solution other than the aqueous phase in step (1), and adjust the temperature and pH for back extraction. During the back extraction process, slowly add about 1.4 moles of NaOH (mass percentage is...

Embodiment 2

[0034] The setting and working principle of this embodiment are the same as that of Embodiment 1, the difference is that:

[0035] (1) Separation of inorganic salts: After adding an acidic complexing agent to the collected 4000mL wastewater for pretreatment, the aqueous phase obtained by extraction is a salt-containing substance; among them, the acidic complexing agent is composed of 500ml trioctyl, decanyl tertiary amine , 400ml sulfonated kerosene, 100ml n-octanol mixed.

[0036] (2) Recovery of inorganic salts: the water phase of step (1) is directly put into the MVR equipment, concentrated and crystallized, and centrifuged to obtain inorganic salts.

[0037] (3) Recovery of organic by-products: Add sodium hydroxide to the extract solution other than the aqueous phase in step (1), and adjust the temperature and pH for stripping. During the stripping process, slowly add about 1.4 moles of ammonia solution (mass percentage 25%), keep the pH of the organic aqueous phase at 9....

Embodiment 3

[0039] The setting and working principle of this embodiment are the same as that of Embodiment 1, the difference is that:

[0040] (1) Separation of inorganic salts: After adding an acidic complexing agent to the collected 3650mL wastewater for pretreatment, the aqueous phase obtained by extraction is a salt-containing substance; among them, the acidic complexing agent is composed of 600ml trioctyl, decanyl tertiary amine , 700ml sulfonated kerosene, 150ml n-octanol mixed.

[0041] (2) Recovery of inorganic salts: the water phase of step (1) is directly put into the MVR equipment, concentrated and crystallized, and centrifuged to obtain inorganic salts.

[0042] (3) Recovery of organic by-products: Add sodium hydroxide to the extract solution other than the aqueous phase in step (1), and adjust the temperature and pH for stripping. During the stripping process, slowly add about 1.4 moles of ammonia solution (mass percentage 20%), make the pH of the organic aqueous phase 9.0-1...

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Abstract

The invention relates to a treatment process combining an H acid mother solution and a T acid mother solution and belongs to the technical field of treatment of H acid production wastewater. The treatment process comprises the following steps: adding an acidic complexing agent into collected wastewater and pre-treating; extracting an obtained water phase; directly adding the water phase into MVR equipment, and concentrating and crystallizing; centrifuging and separating to obtain inorganic salt; adding sodium hydroxide into an extracting solution except the water phase and adjusting temperature and pH to carry out reverse extraction; separating a reverse extraction product obtained by the reverse extraction from an extraction agent, and drying the reverse extraction product to obtain an organic byproduct. The treatment process is applied to the production of H acid, so that the production of solid wastes is avoided and the operation is simple and convenient; recycled products also can be put into secondary utilization so that the production cost is effectively reduced.

Description

technical field [0001] The invention relates to a treatment process combining H-acid mother liquor and T-acid mother liquor, and belongs to the technical field of H-acid production wastewater treatment. Background technique [0002] H acid is an important intermediate in the chemical industry of naphthalene dyes. The traditional H acid production process produces a large amount of T acid mother liquor and H acid mother liquor. The T acid mother liquor and H acid mother liquor produced for each ton of H acid are about 10 tons. . These two streams of water belong to industrial wastewater with high COD, high salinity and high chroma. Among them, the COD of T acid mother liquor is 80000mg / L, the salt content (only ammonium sulfate) is above 30%, and the COD of H acid mother liquor is 20000mg / L. More than L, the salt content is 20%. Compared with the two mother liquors in terms of processing difficulty, the H acid mother liquor is easier to handle. At present, most production e...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01D5/00C01C1/24C02F103/36
Inventor 袁玉明张爱兵莫小平闵阿陆
Owner JIANGXI MADE FINE CHEM IND
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