Differential pressure thermal coupling rectification method and equipment for sulfoxide chloride

A differential pressure thermal coupling, thionyl chloride technology, applied in the fields of sulfur and halogen compounds, fractionation, chemical industry, etc., can solve the problems of high energy consumption, non-compliance with energy saving and emission reduction, and achieve energy saving and conveying equipment saving. and corresponding pipelines to achieve the effect of continuous production
CN103933751AActive Publication Date: 2014-07-23SHANDONG KAISHENG NEW MATERIALS
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG KAISHENG NEW MATERIALS
Publication Date
2014-07-23

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Abstract

The invention relates to a differential pressure thermal coupling rectification method and equipment for sulfoxide chloride. According to the equipment, a heavy component removing tower of a re-boiler is arranged at the bottom of a tower and a light component removing tower of a condenser is arranged at the top of the tower; a condensation re-boiler, an auxiliary condenser and a conversion reactor are arranged between the heavy component removing tower and the light component removing tower. An extract of a vapor-phase material at the top of the heavy component removing tower is divided into two parts, wherein one part is connected with a heating medium inlet of the condensation re-boiler, a heating medium outlet is connected with the auxiliary condenser and then returns back to the top of the heavy component removing tower, a liquid-phase material outlet at the bottom of the light component removing tower is connected with a heated medium inlet of the condensation re-boiler, and then a heated medium outlet returns back to the bottom of the light component removing tower; the other part is connected with the conversion reactor to carry out a reaction of converting sulfur dichloride to sulfur chloride, and a reacted material vapor phase enters the light component removing tower. The differential pressure thermal coupling is used for coupling heat at the top of the heavy component removing tower and heat at the bottom of the light component removing tower and the energy consumption is saved. The difficulty of blocking a pipeline by sulfur is overcome. A practical example shows that a differential pressure thermal coupling rectification process can save energy by more than 50% compared with a conventional process.
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Description

Technical field

[0001] The invention belongs to the technical field of chemical production, and specifically relates to a method and equipment for a thionyl chloride differential pressure thermal coupling distillation. Background technique

[0002] Thionyl chloride is a colorless or light yellow liquid with pungent odor under normal temperature and pressure. It will decompose in a small amount above the boiling point (78.8โ„ƒ). The decomposition rate is faster at 140โ„ƒ, and it is completely decomposed at 500โ„ƒ. The products are sulfur dioxide, chlorine, sulfur dichloride and sulfur monochloride. Because of its strong chlorination and acylation capabilities, it is an important chemical intermediate and is widely used in traditional industries such as agriculture, medicine, and dyes. . In addition, the scope of application of thionyl chloride is also expanding, and downstream areas are gradually increasing. It has been used in food additive industries such as the preparation of sucral...

Claims

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