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Catalytic wet oxidation method of cyanogen-containing industrial wastewater

A technology for catalytic wet oxidation and industrial wastewater, applied in chemical instruments and methods, oxidized water/sewage treatment, catalysts for physical/chemical processes, etc. The effect of improving catalyst strength, prolonging service life and good technical effect

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that in the prior art, when treating cyanide-containing industrial wastewater, there are problems such as difficulty in catalyst formation, low strength (catalyst pulverization after reaction), short service life, low removal rate and complicated process , to provide a new catalytic wet oxidation treatment method for cyanide-containing industrial wastewater

Method used

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  • Catalytic wet oxidation method of cyanogen-containing industrial wastewater
  • Catalytic wet oxidation method of cyanogen-containing industrial wastewater
  • Catalytic wet oxidation method of cyanogen-containing industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Take an appropriate amount of nano-component oxide and binder, i.e. 85wt% TiO 2 , 15wt% ZrO 2 And account for 2wt% of the whole oxide weight of methyl cellulose, ball milling and dry mixing for 4h;

[0019] 2) Transfer the aforementioned mixture into a mud mill, add 5wt% HAc aqueous solution dropwise, and stop adding the solution when the whole mixture is about to change from powder to fine particles, lumps or agglomerates, and then knead for 4 hours;

[0020] 3) The refined mud is aged below 10°C for 12 hours before forming;

[0021] 4) Select a suitable orifice plate such as Φ1.6mm to continuously extrude thin strips. When extruding, pay attention to the screw speed and the pressure in the chamber, keep the speed at about 50r / min, and the pressure at about 80MPa;

[0022] 5) The formed thin strip carrier green body is naturally dried for 8 hours, and forced to dry in an oven for 24 hours;

[0023] 6) Roast according to the following procedures:

[0024] RT (6...

Embodiment 2～13

[0042] The preparation method is the same as in Example 1, only the raw material components and their proportions are changed, and the drying and roasting conditions are changed. The obtained catalyst is shown in Table 1; the reaction results of the catalyst under different wastewater and evaluation conditions are shown in Table 2.

Embodiment 14～17

[0044] Using the catalyst prepared in Example 2, the reaction conditions were changed, and the evaluation results are shown in Table 3.

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Abstract

The invention relates to a catalytic wet oxidation method of cyanogen-containing industrial wastewater. With the method, problems of catalysts in existing technologies, such as difficult shaping, low activity, easy crushing, short service life, low COD removing rate, and complicated technology, can be solved. According to the invention, industrial wastewater and gas containing elementary oxygen are adopted as raw materials. Under a reaction temperature of 230-300 DEG C, a reaction pressure of 3-10MPa, and a liquid space velocity of 0.5-2.5h<-1>, the raw materials contact a catalyst, such tat a COD removing rate is higher than 95%. After the treatment, a total cyanogen content is smaller than 5ppm. The adopted catalyst is a composite carrier loaded with at least one metal selected from Pt,Pd, Ru, Ir, or Rh, or an oxide of the metals. With the method provided by the invention, the problem is well solved. The method can be used in industrial treatment of cyanogen-containing industrial wastewater.

Description

technical field [0001] The invention relates to a catalytic wet oxidation method for cyanide-containing industrial wastewater. Background technique [0002] Most cyanides are highly toxic or highly toxic substances, and a very small amount of cyanides (a few milligrams per kilogram of body weight) will poison people and animals to death in a very short period of time; even water with a very low concentration of cyanides (< 0.05mg / L) will also poison and kill fish and other aquatic organisms, and cause crop yield reduction. The key to cyanide poisoning is cyanide [CN - ] Combined with ferrichrome oxidase in the cells, the cells lose their ability to take in and utilize oxygen, leading to inhibition of the respiratory center and death. Therefore, in the industrial production of cyanide-related industries such as acrylonitrile, the use and discharge of cyanide must be strictly controlled, and complete sewage treatment facilities must be provided to reduce the amount of cya...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J23/644B01J23/63B01J23/46C02F101/18
Inventor 吴历斌宋卫林汪国军吴粮华
Owner CHINA PETROLEUM & CHEM CORP
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