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Method of oxidizing ammonium sulfite using ionizing radiation

A technology of oxidizing ammonium sulfite and ionizing radiation, which is applied in the chemical industry, can solve the problems of the disappearance of the catalytic effect of cobalt ions, and achieve the effects of low energy consumption and simple process flow

Inactive Publication Date: 2005-05-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the oxidation rate can be increased after adding the catalyst, when the concentration of ammonia ions is high, the catalytic effect of cobalt ions disappears due to the complexation of ammonia ions and cobalt ions

Method used

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  • Method of oxidizing ammonium sulfite using ionizing radiation
  • Method of oxidizing ammonium sulfite using ionizing radiation

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Experimental program
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Embodiment 1

[0018] figure 1 Medium ammonium sulfite solution tank 1, gas-liquid mixing device 2, liquid pumps 3, 7, electron accelerator 4, irradiation chamber 5, intermediate solution tank 6.

[0019] The ammonium sulfite solution with a concentration of 30% is pumped up by the pump 3 and then enters the gas-liquid mixing device 2 along the pipeline, along a two-phase nozzle, forms mist droplets with an average particle size of 40 microns, and enters the irradiation chamber. The nozzle injects air while ejecting liquid into the irradiation chamber, and the mass ratio of air and solution is 25 / 100. Solution droplets and air pass through an electron irradiation area at a speed of 5.5m / s in the horizontal direction. The high-energy electron irradiation area is produced by a pulsed electron accelerator, which emits electrons with an energy of 0.6 Mev and a beam intensity of 5 mA. These electrons enter the irradiation chamber after passing through a titanium window, forming a radiation fiel...

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Abstract

The invention discloses a method for oxidizing ammonium sulfite by ionizing radiation, which belongs to the technical field of chemical industry. This method is to pass the ammonium sulfite solution with a concentration of 30% through the nozzle to form tiny droplets of ammonium sulfite solution with a moving speed of 5.5m / s, and pass the tiny droplets of ammonium sulfite solution through ionizing radiation in the presence of oxygen-containing gas. Field, oxidized by oxygen to ammonium sulfate. The method of the invention can oxidize ammonium sulfite into ammonium sulfate with very little energy expenditure, and has the characteristics of low energy consumption and simple process flow.

Description

technical field [0001] The invention belongs to the technical field of chemical industry. The present invention relates to a kind of method that ammonium sulfite is oxidized into ammonium sulfate, more specifically, is under the condition that air exists, utilizes ionizing radiation to irradiate ammonium sulfite, and ammonium sulfite is oxidized into the method for ammonium sulfate. Background technique [0002] Ammonium sulfate is an important raw material for the production of nitrogen, phosphorus and potassium ternary compound fertilizers. Ammonium sulfite can also be applied directly as a chemical fertilizer, but the product has poor stability and is difficult to be accepted by farmers; as a raw material for small paper mills, it will generate waste water and cause secondary pollution. It is an ideal process to directly oxidize high-concentration ammonium sulfite solution to produce ammonium sulfate. [0003] The prior art all adopts the air oxidation method to oxidize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/08C01C1/24
Inventor 徐光张毅张明
Owner TSINGHUA UNIV