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Device for producing chlorosulfonic acid by m/p-phthaloyl chloride induced air and process thereof

A technology for phthaloyl chloride induced air and production equipment, which is applied in the field of iso/terephthaloyl chloride induced air to produce chlorosulfonic acid, and can solve the problems of high impurity content in by-products, waste of resources, and large consumption of water and liquid caustic soda and other issues, to achieve the effect of increasing the added value of products, reducing waste gas emissions, and realizing recycling

Inactive Publication Date: 2019-03-19
SHANDONG KAISHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the following problems: (1) high impurity content of by-products, difficult to reuse; (2) high energy consumption, difficult to sell long-term backlog of by-products produced; (3) large consumption of water and liquid caustic soda, resulting in waste of resources
[0003] The existing chlorosulfonic acid production process and equipment are complicated, the raw material pretreatment degree is high in the early stage, the chlorosulfonic acid production equipment is easy to be corroded, damaged, replaced and repaired frequently; the production tail gas is difficult to deal with, the energy consumption is high, the waste of resources is serious, and it is easy to generate environmental pollution question

Method used

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  • Device for producing chlorosulfonic acid by m/p-phthaloyl chloride induced air and process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The device for producing chlorosulfonic acid by introducing air from terephthaloyl dichloride described in present embodiment 1 includes air pretreatment device, chlorosulfonic acid production unit and sulfur dioxide treatment recovery device; Device 5 is divided into two roads by pipeline, is respectively connected with the bottom side of primary reaction tower 6 and secondary reaction tower 7 in the chlorosulfonic acid production plant, and the top of secondary reaction tower 7 in the chlorosulfonic acid production plant passes through The pipeline is connected with the sulfur distribution reactor 17 in the sulfur dioxide treatment and recovery device.

[0050] The induced air pretreatment device includes an absorption tower 3, an induced air condenser 4 and a mist catcher 5, the upper side of the absorption tower 3 is connected to the thionyl chloride feed line 1, and the lower side of the absorption tower 3 is connected to the m / t The formyl chloride induced air fee...

Embodiment 2

[0074] Embodiment 2 is identical with the device and technology thereof that the inter / terephthaloyl dichloride described in embodiment 1 induces air to produce chlorosulfonic acid, and difference is:

[0075] Inter / terephthaloyl dichloride leads to air, in mass percentage, the raw material composition is as follows: HCl 10%, SO 2 22%, acid chloride 3% and air 63%.

[0076] The absorbent is thionyl chloride, and the outlet temperature of induced draft condenser 4 is 32°C.

[0077] Both the primary reaction tower 6 and the secondary reaction tower 7 are provided with cooling jackets for circulating water.

[0078] The gas phase residence time in the sulfur matching reactor 17 is 7s.

[0079] The primary reaction tower 6 controls the temperature at 80-90°C.

[0080] The outlet temperature of the primary circulating condenser 9 is controlled to be 45°C.

[0081] The outlet temperature of the primary product condenser 11 is controlled to be 38°C.

[0082] The temperature of ...

Embodiment 3

[0087] Embodiment 3 is identical with the device and technology thereof that the inter / terephthaloyl dichloride described in embodiment 1 induces air to produce chlorosulfonic acid, and difference is:

[0088] Inter / terephthaloyl dichloride leads to air, in mass percentage, the raw material composition is as follows: HCl 10%, SO 2 22%, acid chloride 3% and air 63%.

[0089] The absorbent is thionyl chloride, and the outlet temperature of induced draft condenser 4 is 30°C.

[0090] Both the primary reaction tower 6 and the secondary reaction tower 7 are provided with cooling jackets for circulating water.

[0091] The gas phase residence time in the sulfur matching reactor 17 is 10s.

[0092] The temperature of primary reaction tower 6 is controlled at 75-85°C.

[0093] The outlet temperature of the primary circulating condenser 9 is controlled to be 40°C.

[0094] The outlet temperature of the primary product condenser 11 is controlled to be 35°C.

[0095] The temperatur...

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Abstract

The invention belongs to the technical field of tail gas treatment, and in particular relates to a device for producing chlorosulfonic acid by m / p-phthaloyl chloride induced air and a process thereof.The device comprises an induced air pretreatment device, a chlorosulfonic acid production device and a sulfur dioxide treatment recovery device. A mist catcher in the induced air pre-treatment deviceis divided into two paths through a pipeline and the two paths are separately connected to one sides of the bottoms of a primary reaction tower and a secondary reaction tower in the chlorosulfonic acid production device, and the top of the secondary reaction tower in the chlorosulfonic acid production device is connected to a sulfur proportioning reaction kettle in the sulfur dioxide treatment recovery device through pipelines. According to the process for producing chlorosulfonic acid by m / p-phthaloyl chloride induced air, emission of exhaust gas is reduced to achieve cyclic utilization of high purity sulfur dioxide, and the product additional value of hydrogen chloride in the induced air is further improved. The device is reasonable in design, high in safety, simple to operate and low in production cost, and turns waste into wealth.

Description

technical field [0001] The invention belongs to the technical field of tail gas treatment, and in particular relates to a device and a process for producing chlorosulfonic acid by introducing air from iso / terephthaloyl dichloride. Background technique [0002] At present, my country's production enterprises mainly use the thionyl chloride method or the phosgene method to produce acid chlorides. The air induced by the reaction in the production of the thionyl chloride method mainly contains hydrogen chloride, sulfur dioxide, acid chlorides and air. At present, domestically, it mainly uses water absorption and alkali absorption The way to absorb the induced air. The method has the following problems: (1) high impurity content of the by-products and difficulty in reuse; (2) high energy consumption and long-term backlog of the produced by-products which are difficult to sell; (3) large consumption of water and liquid caustic soda, resulting in waste of resources. [0003] The ex...

Claims

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Application Information

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IPC IPC(8): C01B17/46C01B17/50
CPCC01B17/466C01B17/50Y02P20/129
Inventor 张良孙丰春毕义霞孙丰炜王廷刘嵩谢圣斌
Owner SHANDONG KAISHENG NEW MATERIALS