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Acid pickling process for tail gas of H-acid monosodium salt

A single-sodium salt and acid-single technology, which is applied to the separation of dispersed particles, chemical instruments and methods, and separation methods, can solve the problems of high production cost and waste of acid, and achieve the goals of improving quality, reducing usage, and improving tail gas quality Effect

Inactive Publication Date: 2018-06-15
江苏力禾颜料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of H acid monosodium salt tail gas pickling process, which has the advantages of cost saving , improve the quality of exhaust gas after treatment, and the advantages of more environmentally friendly emissions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A H acid monosodium salt tail gas pickling process includes the following process steps:

[0022] S1. Pass the tail gas after the neutralization reaction of H acid monosodium salt into the first washing tower for washing;

[0023] S2. The tail gas discharged from the first washing tower enters the second washing tower for water washing;

[0024] S3. The tail gas discharged from the second water washing tower enters the pickling tower for pickling;

[0025] S4. Finally, the tail gas discharged from the pickling tower is adsorbed by molecular sieve and discharged.

[0026] Specifically, the washing temperature in step S1 and the step S2 is 23°C.

[0027] Specifically, the pickling liquid in step S3 is 68% dilute sulfuric acid.

[0028] Specifically, the molecular sieve adsorption temperature in step S4 is 35°C.

[0029] For the exhaust gas treated by the process of this embodiment 1, when the height of the exhaust cylinder is 15 meters, the ammonia emission is 4.3 kg / h.

Embodiment 2

[0031] A H acid monosodium salt tail gas pickling process includes the following process steps:

[0032] S1. Pass the tail gas after the neutralization reaction of H acid monosodium salt into the first washing tower for washing;

[0033] S2. The tail gas discharged from the first washing tower enters the second washing tower for water washing;

[0034] S3. The tail gas discharged from the second water washing tower enters the pickling tower for pickling;

[0035] S4. Finally, the tail gas discharged from the pickling tower is adsorbed by molecular sieve and discharged.

[0036] Specifically, the washing temperature in step S1 and the step S2 is 25°C.

[0037] Specifically, the pickling liquid in step S3 is 65% dilute sulfuric acid.

[0038] Specifically, the molecular sieve adsorption temperature in step S4 is 20°C.

[0039] The exhaust gas after the process of this embodiment 2 has an ammonia emission of 3.5 kg / h when the height of the exhaust cylinder is 15 meters.

Embodiment 3

[0041] A H acid monosodium salt tail gas pickling process includes the following process steps:

[0042] S1. Pass the tail gas after the neutralization reaction of H acid monosodium salt into the first washing tower for washing;

[0043] S2. The tail gas discharged from the first washing tower enters the second washing tower for water washing;

[0044] S3. The tail gas discharged from the second water washing tower enters the pickling tower for pickling;

[0045] S4. Finally, the tail gas discharged from the pickling tower is adsorbed by molecular sieve and discharged.

[0046] Specifically, the washing temperature in step S1 and the step S2 is 27°C.

[0047] Specifically, the pickling liquid in step S3 is 67% dilute sulfuric acid.

[0048] Specifically, the molecular sieve adsorption temperature in step S4 is 25°C.

[0049] The exhaust gas after the process of this embodiment 3, when the height of the exhaust cylinder is 15 meters, the ammonia emission is 3.9 kg / h.

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Abstract

The invention provides an acid pickling process for tail gas of an H-acid monosodium salt, and particularly relates to the technical field of production of the H-acid monosodium salt. The process comprises the following process steps of: S1, introducing the tail gas obtained after a neutralization reaction of the H-acid monosodium salt is conducted into a first bath tower, and performing water washing; S2, introducing the tail gas discharged from the first bath tower into a second bath tower, and performing water washing; S3, introducing the tail gas discharged from the second bath tower intoan acid pickling tower, and performing acid pickling; and S4, finally performing adsorption on the tail gas discharged from the acid pickling tower by using molecular sieves, and discharging the adsorbed tail gas. The process has the advantages that the cost is saved, the quality of the treated tail gas is improved, and discharging is more environmentally friendly.

Description

Technical field [0001] The invention belongs to the technical field of H acid monosodium salt production, and specifically relates to a H acid monosodium salt tail gas pickling process. Background technique [0002] H acid monosodium salt, the Chinese name is 1-amino-8-naphthol-3,6-disulfonic acid monosodium salt, usually with a crystal water, is an important dye intermediate. H acid monosodium salt is mainly used to produce acid dyes, direct dyes or reactive dyes, such as acid fuchsin 6B, acid scarlet G, acid black 10B, direct black, reactive brilliant red K-2BP, reactive violet K-3R There are more than 90 kinds of dyes such as reactive dark blue KR. These dyes have good effects for dyeing woolen and cotton fabrics. In addition, H acid monosodium salt can also be used to produce medicines. At present, H acid monosodium salt is mainly produced through the following steps: (1) Naphthalene sulfonation to obtain 1,3,6-naphthalenesulfonic acid; (2) 1,3,6-naphthalenetrisulfonic acid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/58
CPCB01D53/18B01D53/261B01D53/58B01D53/78
Inventor 王国强楼建华石成相
Owner 江苏力禾颜料有限公司
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