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A microreactor device and its application in the preparation of sulfonated products of benzene series

A micro-reactor and product technology, which is applied in chemical/physical/physical-chemical reactors, sulfonic acid preparation, chemical/physical/physical-chemical processes, etc., can solve the problems of many by-products and high reaction temperature, and improve the conversion rate , Enhance mass transfer and heat transfer, reduce the effect of requirements

Active Publication Date: 2020-04-07
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In order to solve the problem of high reaction temperature and many by-products in the sulfonation of benzene and its derivatives in the prior art, the present invention provides a micro-reaction device; the present invention also provides a micro-reaction device in the preparation Application of sulfonated products of benzene series

Method used

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  • A microreactor device and its application in the preparation of sulfonated products of benzene series
  • A microreactor device and its application in the preparation of sulfonated products of benzene series

Examples

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Embodiment 1

[0032] See figure 1 , a micro-reaction device, comprising a liquid feed pump 1, a gas feed device 2, a mixer 3, a microreactor 4, a back pressure valve 5 and a product collection tank 6, a liquid feed pump 1, a gas feed device 2 Link to each other with mixer 3 respectively, outlet of mixer 3, microreactor 4, back pressure valve 5, product collection tank 6 and lye tank 15 are connected in series, microreactor 4 comprises reaction cavity 7 and heat exchange jacket 8, reaction A reaction tube 9 is arranged inside the chamber 7, and a heat exchange jacket 8 is arranged outside the reaction chamber 7. The upper part of the heat exchange jacket 8 is provided with a condensed water inlet 10, and the lower part of the heat exchange jacket 8 is provided with an exchanged condensed water outlet 11. . A sealing layer 12 is provided on the outer wall of the reaction chamber 7 for isolating the reaction chamber 7 and the heat exchange jacket 8 from each other.

[0033] The microreactor ...

Embodiment 2

[0041] Microchannel reaction device is the same as embodiment 1, microchannel reaction tube inner diameter 6mm, the total volume 1000ml of microchannel reaction tube, SO in the mixed gas 3 The concentration dilution is 6%, the feeding amount of benzene is 300ml, SO 3 The molar ratio to benzene is 1:1.7, the reaction residence time is 10min, the reaction temperature is 10°C, and the pressure of the back pressure valve is 1MPa; the conversion rate of benzene is 57.5%, and the selectivity of benzenesulfonic acid is 88.2%.

Embodiment 3

[0043] Microchannel reaction device is the same as embodiment 1, microchannel reaction tube inner diameter 7mm, the total volume 1000ml of microchannel reaction tube, SO in the mixed gas 3 The concentration dilution is 6%, the feeding amount of benzene is 300ml, SO 3 The molar ratio to benzene is 1:1.7, the reaction residence time is 10min, the reaction temperature is 10°C, and the pressure of the back pressure valve is 1MPa; the conversion rate of benzene is 55.6%, and the selectivity of benzenesulfonic acid is 84.2%.

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Abstract

The invention discloses a micro reactor device comprising a liquid feed pump, a gas feed device, a mixer, a micro reactor, a back pressure valve and a product collection tank. The liquid feed pump andthe gas feed device are respectively connected with the mixer, the outlet of the mixer, the microreactor, the back pressure valve and the product collection tank are connected in series, the microreactor includes a reaction chamber and a heat exchange jacket, a reaction tube is arranged in the reaction chamber, the heat exchange jacket is arranged outside the reaction chamber, the upper part of the heat exchange jacket is provided with a heat exchange medium inlet, and the lower end of the heat exchange jacket is provided with a heat exchange medium outlet. The invention also discloses the application of the micro reactor device in preparing sulfonation products of benzene series. The micro reactor device is used for sulfonation of benzene and benzene derivatives, mass transfer and heat transfer are enhanced, reaction can be carried out at a relatively low temperature without amplification effect, the investment in equipment and operating cost can be reduced, the production environment is more safe and efficient, and the micro reactor device has good industrial application prospects.

Description

technical field [0001] The invention relates to chemical reaction equipment, in particular to a micro-reactor device and its application in the preparation of sulfonated products of benzene series. Background technique [0002] The sulfonated products of benzene and its derivatives are an important class of fine organic chemical raw materials, which are widely used in the industry to produce sulfur dyes, detergents, photoinitiators for UV-curable coatings, and pharmaceutical intermediates and pesticide intermediates. production. At present, the sulfonation of benzene and its derivatives is sulfonated with concentrated sulfuric acid or oleum. The reaction temperature is high and a large amount of heat is released. During the reaction, there are many reaction by-products and poor reaction selectivity, which seriously affects the product yield. and quality; and the waste acid after the reaction is difficult to handle, which is easy to pollute the environment. Contents of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/00C07C303/06C07C309/29
CPCB01J19/0093B01J2219/00862B01J2219/00873B01J2219/00961C07C303/06C07C309/29
Inventor 郭凯张东万力张锴欧阳平凯
Owner NANJING TECH UNIV
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