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Method for recycling sulfonation tail gas

A technology of sulfonation reaction and tail gas circulation, applied in chemical instruments and methods, formation/introduction of sulfonic acid group/dihydroxysulfonyl group, inorganic chemistry, etc., can solve problems such as inapplicable sulfonation production mode, and achieve energy reduction consumption, broad application prospects, and the effect of reducing pollution

Inactive Publication Date: 2016-10-26
新疆金塔投资(集团)有限公司
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Problems solved by technology

[0011] The present invention provides a method for recycling tail gas of sulfonation reaction, which overcomes the deficiencies of the prior art and can effectively solve the problem that the method for treating tail gas of sulfonation reaction in the prior art is not applicable to the current sulfonation production mode

Method used

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  • Method for recycling sulfonation tail gas

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Embodiment 1

[0023] Embodiment 1, as attached figure 1 As shown, the method for recycling the tail gas of the sulfonation reaction is carried out according to the following steps: first remove the acidic oil mist carried in the tail gas produced by the sulfonation reaction and dehydrate it, and then remove the acidic oil mist and dehydrate the tail gas Enter the sulfur combustion system together with supplementary oxygen or air to obtain a gas mainly composed of sulfur dioxide, then further oxidize the gas mainly composed of sulfur dioxide to obtain a gas mainly composed of sulfur trioxide, and finally convert the gas mainly composed of sulfur trioxide The gas is sent into the sulfonation system to participate in the sulfonation reaction, so that the tail gas can be recycled without being discharged.

Embodiment 2

[0024] Example 2, as an optimization of the above example, remove the acidic oil mist carried in the exhaust gas so that the mist removal rate can reach more than 98%.

Embodiment 3

[0025] Embodiment 3, as an optimization of the above embodiment, the water content in the tail gas after dehydration is less than or equal to 0.01g·H 2 O / kg dry gas.

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Abstract

The invention relates to the technical field of sulfonation tail gas treatment, in particular to a method for recycling sulfonation tail gas, comprising the following steps: removing acidic oil mist carried in sulfonation-produced tail gas, dewatering, feeding the dewatered tail gas with supplemented oxygen or air into a sulfur combustion system to produce tail gas mainly composed of sulfur dioxide, further oxidizing the tail gas to obtain tail gas mainly composed of sulfur trioxide, and feeding the tail gas mainly composed of sulfur trioxide into a sulfonation system for sulfonation. The method for recycling sulfonation tail gas provided herein need not use alkaline liquid to absorb and remove sulfur dioxide in the tail gas, no waste liquid is produced, new pollution source due to the absorption by the alkaline is avoided, the tail gas may be recycled without emission, energy consumption is thereby reduced, environmental pollution is greatly reduced, and operation expenditure is also reduced; the method for treating sulfonation tail gas is more applicable to existing sulfonation production modes and has a promising application prospect.

Description

technical field [0001] The invention relates to the technical field of sulfonation reaction tail gas treatment, and relates to a method for recycling the sulfonation reaction tail gas. Background technique [0002] Sulfonates are a class of widely used anionic surfactants, which play an important role in many fields. The tail gas generated during the production of sulfonate by using gas phase sulfur trioxide as sulfonating agent contains sulfur dioxide and sulfur trioxide, and direct discharge will cause serious pollution to the atmospheric environment. [0003] In order to avoid pollution caused by exhaust gas, conventional treatment methods can be roughly divided into four categories: [0004] The first category, the tail gas is discharged after the waste acid is removed through the electrostatic demisting device, so as to reduce the pollution of the tail gas to the environment. Such as patent CN201320358667 and so on. [0005] The second category is to absorb certain h...

Claims

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Application Information

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IPC IPC(8): C01B17/74C07B45/02
CPCC01B17/74C07B45/02
Inventor 高峰方新湘程尚民白云周华朱海霞杨栩王志左新龙
Owner 新疆金塔投资(集团)有限公司
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