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Method for improving oxygen mass transfer of oxygen consumption system

A system and medium technology, applied in separation methods, chemical instruments and methods, liquid degassing, etc., can solve the problems of short service life of production equipment, limited oxygen consumption reaction rate, low oxygen consumption reaction efficiency, etc., to increase the service life. , The effect of reducing production cost and enhancing oxygen mass transfer efficiency

Pending Publication Date: 2022-06-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] (1) In the prior art, the reaction conditions of the oxygen-consuming system involving oxygen in the chemical production process are harsh and the production cost is high
[0007] (2) In the prior art, oxygen mass transfer limits the oxygen consumption reaction rate, making the oxygen consumption reaction efficiency relatively low
[0008] (3) The harsh reaction conditions in the prior art have relatively high requirements on equipment, and the service life of production equipment is relatively short

Method used

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  • Method for improving oxygen mass transfer of oxygen consumption system
  • Method for improving oxygen mass transfer of oxygen consumption system
  • Method for improving oxygen mass transfer of oxygen consumption system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] The temperature of the reaction system was set to 40 °C, and the stirring speed was 300 rpm. The control experiment was carried out with or without the addition of an oxygen-carrying medium. The reaction time was 1 h. The iodometric titration method and the differential method were used to calculate Na 2 SO 3 conversion rate, the results show that: without adding oxygen-carrying medium, Na 2 SO 3 The conversion was 69.2%, while after adding the oxygen-carrying medium, Na 2 SO 3 The conversion rate was 88.1%, and the conversion rate increased by 18.9%.

Embodiment 2

[0069] The temperature of the reaction system was set to 60 °C, and the stirring speed was 300 rpm. The control experiment was carried out with or without the addition of an oxygen-carrying medium. The reaction time was 1 h. The iodometry and differential methods were used to calculate Na 2 SO 3 conversion rate, the results show that: without adding oxygen-carrying medium, Na 2 SO 3 The conversion was 80.2%, while after adding the oxygen-carrying medium, Na 2 SO 3 The conversion rate was 93.8%, and the conversion rate increased by 13.6%.

Embodiment 3

[0071] The temperature of the reaction system was set to 60 °C, and the stirring speed was 500 rpm. The control experiment was carried out with or without the addition of an oxygen-carrying medium. The reaction time was 1 h. The iodometry and differential methods were used to calculate Na 2 SO 3 conversion rate, the results show that: without adding oxygen-carrying medium, Na 2 SO 3 The conversion was 88.3%, while after adding the oxygen-carrying medium, Na 2 SO 3 The conversion rate was 99.5%, and the conversion rate increased by 11.2%.

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Abstract

The invention belongs to the technical field of chemical production, and discloses a method for improving oxygen mass transfer of an oxygen consumption system, which comprises the following steps: preparing 0.5 L of 0.1 mol / L sodium sulfite solution; raising the temperature of the system to a preset temperature, and degassing the solution with nitrogen; adding an organic matter oxygen-carrying medium, introducing O2 at the speed of 1L / min in a stirring state, and reacting for a period of time; the content of residual Na2SO3 in the solution is measured by iodometric titration, and the conversion rate of sodium sulfite is calculated by differential method. According to the method, the oxygen mass transfer efficiency of a reaction system is effectively improved, the operation method is simple, the cost is low, and the method can be applied to most gas-liquid oxygen consumption systems. According to the invention, oxygen mass transfer is carried out by using higher oxygen solubility and chemical potential gradient of the organic matter oxygen-carrying medium, and gas-liquid mass transfer resistance is reduced, so that the chemical reaction rate of an oxygen consumption system is increased.

Description

technical field [0001] The invention belongs to the technical field of chemical production, in particular to a method for improving oxygen mass transfer in an oxygen consumption system. Background technique [0002] At present, for some gas-liquid reactions involving oxygen in chemical production, such as some polymerization reactions, oxygen pressure leaching reactions and other redox reactions using oxygen, due to the low solubility of oxygen in aqueous solutions, at room temperature and standard atmospheric pressure, The solubility of oxygen in water is only 5.8ml / L. For some gas-liquid reactions involving oxygen, due to the low solubility and diffusion coefficient of oxygen in water, the mass transfer of oxygen has become a key factor limiting the rate of oxygen-consuming reactions. Solubility, enhance mass transfer; increase the reaction temperature of the system to improve the chemical driving force of the oxygen-consuming reaction, and can also strengthen the gas dif...

Claims

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Application Information

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IPC IPC(8): B01J19/18B01D19/00
CPCB01J19/18B01D19/0073
Inventor 侯彦青官鹏陈凤阳寇斌赵中铮赵丹袁兴平陈远亮谢刚田林杨妮
Owner KUNMING UNIV OF SCI & TECH