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Continuous chlorination method for phenol and circulating flow spray type continuous gas-liquid reactor

A gas-liquid reactor, reactor technology, applied in chemical/physical/physical-chemical stationary reactors, chemical instruments and methods, detailed information on chemical/physical/physical-chemical reactors, etc., can solve the problem of low equipment utilization. , low utilization rate of gas phase, long gas-liquid reaction time, etc., to achieve the effects of increasing solubility, increasing utilization rate of gas phase, and increasing contact time

Active Publication Date: 2017-06-30
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of the above-mentioned gas-liquid reactor is relatively simple, and it is applied in the continuous chlorination process of phenol. The gas-liquid reaction time is long, the gas phase utilization rate is low, the equipment utilization rate is low, and the gas-liquid reaction time is long.

Method used

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  • Continuous chlorination method for phenol and circulating flow spray type continuous gas-liquid reactor
  • Continuous chlorination method for phenol and circulating flow spray type continuous gas-liquid reactor
  • Continuous chlorination method for phenol and circulating flow spray type continuous gas-liquid reactor

Examples

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Embodiment 1

[0058] A method for continuous chlorination of phenol, wherein phenol and chlorine are continuously introduced into the loop continuous gas-liquid reactor 100 in a molar ratio of 1:2, the reaction temperature is controlled to be 50° C., and the reaction pressure is a slight negative pressure; the slight negative pressure is Refers to the reaction pressure slightly lower than the standard atmospheric pressure, such as -50Pa, -20Pa, -10Pa;

[0059] Wherein, the loop continuous gas-liquid reactor 100 is formed by a staggered arrangement of five first single-stage reactors and five second single-stage reactors, that is, the number of the first partitions 2 is five, and the second partitions The number of boards 3 is four. Both phenol and chlorine are introduced from the first-stage first single-stage reactor 4a, and the liquid phase is circulated and transported through the first circulation conveying device, and the gas-liquid mixed phase enters the adjacent middle through the ga...

Embodiment 2

[0061] A method for continuous chlorination of phenol, wherein phenol and chlorine are continuously introduced into the loop continuous gas-liquid reactor 100 at a molar ratio of 1:2.02, the reaction temperature is controlled to be 60° C., and the reaction pressure is 1 standard atmosphere;

[0062] Wherein, the loop continuous gas-liquid reactor 100 is formed by staggered arrangements of three first single-stage reactors and three second single-stage reactors, that is, the number of the first partitions 2 is three, and the second partitions The number of boards 3 is two.

[0063] Phenol is introduced from the first single-stage reactor 4a of the first stage, and the amount of chlorine gas introduced from the first single-stage reactor 4a of the first stage accounts for 60% of the total amount of chlorine gas, and the other 40% is introduced from the remaining stages;

[0064] In the first-stage first single-stage reactor 4a, the liquid phase circulation is realized through th...

Embodiment 3

[0066] A method for continuous chlorination of phenol, wherein phenol and chlorine are continuously introduced into the loop continuous gas-liquid reactor 100 at a molar ratio of 1:2.05, the reaction temperature is controlled to be 70° C., and the reaction pressure is 1.5 standard atmospheres;

[0067]Wherein, the loop continuous gas-liquid reactor 100 is formed by staggered arrangements of 4 first single-stage reactors and 4 second second single-stage reactors, that is, the number of the first partitions 2 is 4, and the second partitions The number of boards 3 is three.

[0068] Phenol is introduced from the first-stage first single-stage reactor 4a, chlorine gas is introduced from the first-stage first single-stage reactor 4a to account for 80% of the total amount of chlorine gas, and another 20% is introduced from the remaining stages;

[0069] In the first-stage first single-stage reactor 4a, the liquid phase circulation is realized through the first circulation conveying ...

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Abstract

The invention discloses a continuous chlorination method for phenol. Phenol and chlorine are taken as raw materials and react in a circulating flow spray type continuous gas-liquid reactor, wherein the circulating flow spray type continuous gas-liquid reactor comprises a casing, multiple first partition boards with gas-liquid mixing channels and multiple second partition boards with gas-phase channels and liquid-phase overflow channels, the multiple first partition boards and the multiple second partition boards are arranged in the casing and distributed alternately, and first single-stage reactors and second single-stage reactors are formed through surrounding of the first partition boards, the second partition boards and the casing, arranged alternately and communicated; gas-phase material flow and liquid-phase material flow in the first single-stage reactors are downstream, while gas-phase material flow and liquid-phase material flow in the second single-stage reactors are upstream. With adoption of the continuous chlorination method for phenol, the gas-phase utilization rate and the target product yield are high. The invention further provides the circulating flow spray type continuous gas-liquid reactor.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for continuous chlorination of phenol and a circulating spray continuous gas-liquid reactor. Background technique [0002] In chemical reactions, gas-liquid reaction refers to a multiphase reaction process in which there are gas and liquid phases in the reactant system. Usually, the gas phase reactants are dissolved in the liquid phase and then react with other reactants in the liquid phase. The gas-liquid reaction is a heterogeneous reaction. The speed of the reaction and the degree of absorption of the gas mainly depend on the degree of solubility of the gas in the liquid. The higher the solubility of the gas in the liquid, the greater the degree of gas-liquid reaction and the reaction is sufficient. [0003] In the related art, the reactors used for gas-liquid reaction are divided according to the form of gas-liquid phase contact, and can be divided into: (1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/62C07C39/30B01J10/00B01J19/24
CPCB01J10/00B01J19/006B01J19/2465B01J19/249B01J2219/00768B01J2219/2453B01J2219/2462B01J2219/2467C07C37/62C07C39/30
Inventor 艾秋红黄荣辉
Owner XIANGTAN UNIV
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