Sulfur dioxide vaporization technology for thionyl chloride production

A technology of sulfur dioxide and thionyl chloride, used in inorganic chemistry, thionyl chloride, sulfur compounds, etc., can solve the problems of difficult replacement of heating rods, short service life of heating rods, increase production costs, etc., and achieve low equipment investment and operating costs. , The equipment has a long service life and achieves the effect of recycling.

Active Publication Date: 2018-08-31
CHINA TIANCHEN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this vaporization process is that the life of the heating rod is short, and the service life is no more than one year, and it is not easy to replace the heating rod after it is damaged. It is necessary to replace the vaporizer as a whole, which greatly increases the production cost.

Method used

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  • Sulfur dioxide vaporization technology for thionyl chloride production
  • Sulfur dioxide vaporization technology for thionyl chloride production
  • Sulfur dioxide vaporization technology for thionyl chloride production

Examples

Experimental program
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Effect test

Embodiment 1

[0050] The feed rate of liquid sulfur dioxide from the raw material tank area is 750kg / h, and the temperature of the material at the outlet of vaporizer 01 is controlled at 40°C. The selected coiled coiled tube 011 has a specification of Φ50mm and a coiled diameter of 1000mm. The coiled coiled tube 011 has 20 coils and the heat exchange area is about 10m 2 . The width of the water tank 012 of the carburetor 01 is 1400 mm, and the height is 2600 mm. The length of the water tank 012 can be determined according to the number of coiled coils 011 used. In this embodiment, only one set of coiled coils is used.

[0051] The vaporized sulfur dioxide gas first enters the buffer tank 02 for preliminary gas-liquid phase separation to remove large-diameter droplets in the gas. The diameter of the tank is Φ500mm and the height is 700mm. Then, the sulfur dioxide gas enters the gas-liquid separation tank 03 to remove the tiny liquid droplets and oil mist entrained in the gas.

[0052] Gas-...

Embodiment 2

[0059] For the sulfur dioxide vaporization process involved in the present invention, the operation process of embodiment 2 is the same as that of embodiment 1. The difference between Example 2 and Example 1 is that the feed rate of liquid sulfur dioxide is 1500kg / h, two sets of coiled coiled tubes 011 are used, and the heat exchange area is about 20m 2 . The buffer tank 2 has a diameter of Φ1200mm and a height of 1400mm. The gas-liquid separation tank 3 has a diameter of Φ1600mm and a height of 1800mm. The inner cylinder has a diameter of Φ1000mm and a height of 1500mm. At the same time, there are strip-shaped holes in the inner cylinder on the side wall of the inner cylinder.

[0060] The total heat transfer coefficient of sulfur dioxide vaporization in this embodiment is 114W / m 2 .℃, there is no liquid phase component in the sulfur dioxide gas phase stream entering the thionyl chloride reaction system.

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Abstract

The invention provides a sulfur dioxide vaporization technology for thionyl chloride production. The technology comprises steps as follows: step 1, liquid sulfur dioxide enters a vaporizer for vaporization, and the vaporizer is a coil pipe type vaporizer; step 2, sulfur dioxide gas obtained after vaporization enters a buffer tank for gas-liquid phase separation, and large-diameter liquid drops inthe gas are removed; step 3, the sulfur dioxide gas enters a gas-liquid separation tank, and tiny droplets and oil mist entrained in the gas are removed. The technology is simple to control, equipmentinvestment is low, popularization is facilitated, heat transfer coefficient in a sulfur dioxide vaporization process is effectively increased, the service life of equipment is prolonged, and meanwhile, energy consumption is substantially reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering process, and in particular relates to a sulfur dioxide vaporization process used for the production of thionyl chloride. Background technique [0002] Thionyl chloride is an important fine chemical product and an intermediate in the synthesis process of many chemical products. It has strong chlorination and acid chlorination ability, and can significantly improve the utilization rate of some expensive raw materials. As a chlorination reagent and acyl chloride reagent, thionyl chloride is mainly used in pesticides, medicines, dyes and other industries. Thionyl chloride can also be used as a chlorinating agent for the synthesis or replacement of alcohols, acid anhydrides, and nitro compounds, and has a broad application market and development prospects. [0003] At present, most of the new large-scale thionyl chloride production units in my country adopt the sulfur dioxide gas phase me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/45C01B17/56
CPCC01B17/4584C01B17/56
Inventor 程庆来庄六星李秀燕张进治张猛杨洪轩刘国锴
Owner CHINA TIANCHEN ENG
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