Two-sided cooling concentric sleeve type sulfonation reactor

Abstract

The double-side cooling concentric sleeve type sulfonation reactor relates to a double-side cooling concentric sleeve type sulfonation reactor. The double-side cooling concentric sleeve type sulfonation reactor includes a cooling inner tube (1), a reaction sleeve ( 2), cooling jacket (3), spiral jet tube (4), spiral deflector (5), spoiler column (6), cooling jacket outlet pipe (7), reaction jacket outlet pipe (8), Cooling jacket inlet pipe (9) and reaction jacket inlet pipe (10), etc. The cooling inner tube, the reaction sleeve and the cooling sleeve are arranged concentrically to form a reaction chamber and two heat exchange chambers. At the same time, a spiral jet tube and a spiral guide vane are respectively installed in the two chambers to ensure that the reaction materials and The coolant can flow in a spiral, and the mass transfer and heat transfer are simultaneously enhanced. The invention has fast heat exchange speed and safe and reliable reaction, and is especially suitable for a continuous sulfonation reaction process using liquid-phase sulfur trioxide as a sulfonating agent.

Description

technical field [0001] The invention relates to a casing type reactor, in particular to a double-side cooling concentric casing type sulfonation reactor. Background technique [0002] The sulfonation reaction using liquid-phase sulfur trioxide as the sulfonating agent is usually carried out by dripping in a kettle, that is, the sulfonated substance (such as nitrobenzene) is put into the reaction kettle first, and then the sulfur trioxide is inserted into the bottom. The tube is slowly dropped into the reaction kettle, and the materials are mixed evenly by stirring, and the materials react violently at the same time, releasing a large amount of heat of reaction. The heat of reaction is removed by a coolant in the reactor jacket to maintain the proper reaction temperature. This reaction method has many defects that cannot be overcome by itself: firstly, the heat transfer area of ​​the reactor is small, and the reaction heat removal rate is slow, which leads to slow addition o...

AI Technical Summary

Problems solved by technology

This reaction method has many defects that cannot be overcome by itself: firstly, the heat transfer area of ​​the reactor is small, and the reaction heat removal rate is slow, which leads to slow addition of sulfonating agent and long production cycle; secondly, continuous dropwise addition of sulfonating agent to the reactor Inside, sulfur trioxide is in continuous contact with the reaction product, resulting in a deepened reaction of the early reaction product and an increase in by-products; in addition, there is a huge potential safety hazard in this reaction process. If the heat cannot be removed in time, the temperature will be out of control and a safety accident will occur.

However, after a large number of experiments, it was found that this reaction process is often difficult to control, because the two materials involved in the reaction are close to the theoretical feed ratio, and the reaction in the initial reaction section of the reaction device is very violent, and the reactor with a common cooling jacket cannot be removed quickly. Reaction heat, leading to temperature out of control, the reaction can not continue

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