Double-side cooling concentric tube-in-tube type sulfonating reactor

Abstract

The invention relates to a double-side cooling concentric tube-in-tube type sulfonating reactor. The double-side cooling concentric sleeve type sulfonating reactor comprises a cooling inner tube (1), a reaction sleeve (2), a cooling sleeve (3), a spiral jet pipe, a spiral flow deflector, spoiler columns (6), a cooling sleeve outlet pipe (7), a reaction sleeve outlet pipe (8), a cooling sleeve inlet pipe (9), a reaction sleeve inlet pipe (10), and the like, wherein the cooling inner tube, the reaction sleeve and the cooling sleeve are arranged in a concentric way, so that a reaction cavity and two heat exchange cavities are formed; furthermore, the spiral jet pipe and the spiral flow deflector are respectively arranged in the reaction cavities, so that the reaction material and a coolant can flow in a spiral way, and mass transfer and heat transfer are synchronously enhanced. The double-side cooling concentric tube-in-tube type sulfonating reactor is rapid in heat exchange speed and safe and reliable in reaction, thus being especially suitable for a continuous sulfonation reaction technology taking 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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