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Treatment method for multiple heavy metal pollution waste catalyst-vanadium catalysts

A technology of waste catalyst and disposal method, applied in the direction of solid waste removal, etc., can solve the problems of environmental threats, difficult resource utilization, etc., and achieve the effect of reducing pollution and harm, simple process flow, and strong operability

Inactive Publication Date: 2018-03-27
云南大地绿坤环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Waste catalyst-vanadium catalyst is widely used, mainly in the production of sulfuric acid, phthalic anhydride, maleic anhydride, etc. According to statistics, about 5% of V 2 o 5 Used in catalyst production, the waste catalyst-vanadium catalyst produced every year reaches tens of millions of tons. The leaching concentration of some heavy metals in these waste catalysts exceeds the hazardous waste landfill pollution control standard (GB18598-2001), which is difficult for resource utilization. Long-term stockpiling, posing a serious threat to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The waste catalyst of a Zinc Industry Co., Ltd.-vanadium catalyst was tested for toxicity leaching by using the solid waste leaching toxic leaching method-horizontal oscillation method (HJ557-2010). The leaching concentration is 4.28mg / L.

[0019] At room temperature, weigh 200g of a variety of heavy metal-contaminated waste catalysts-vanadium catalysts, add 200mL of water to dissolve for 30min, add 20g of ferrous sulfate, and stir for 5min to react; add 6g of polyferrous sulfate, stir evenly, and let stand for 3min to react Add quicklime to adjust the pH value of the system to 11, stir evenly for 10 minutes, and finally add 10 g of curing agent cement, stir evenly, and cure at room temperature for 7 days.

[0020] Performance test: According to the toxic leaching method of solid waste-horizontal oscillation method (HJ 557-2010), the leaching concentration of vanadium is <0.001 g / L, the stabilization / solidification rate reaches 99.9%, and the leaching concentration of a...

Embodiment 2

[0022] A chemical company's waste catalyst-vanadium catalyst, used the horizontal oscillation method (HJ557-2010) of solid waste leaching toxicity leaching method for toxicity leaching detection. The leaching concentrations of nickel are 8.12mg / L, 94.8mg / L and 798mg / L respectively.

[0023] At room temperature, weigh 200g of a variety of heavy metal-contaminated waste catalysts-vanadium catalysts, add 200mL of water to dissolve for 40min, add 50g of ferrous sulfate, and stir for 10min to react; add 8g of polyferrous sulfate, stir evenly, and let it stand for 5min Add quicklime to adjust the pH value of the system to 12, stir evenly for 10 minutes, and finally add 25g of curing agent cement, stir evenly, and maintain at room temperature for 15 days.

[0024] Performance test: According to the toxic leaching method of solid waste-horizontal oscillation method (HJ 557-2010), the leaching concentration of vanadium is <0.001 g / L, the stabilization / curing rate reaches 99.9%, and the...

Embodiment 3

[0026] The waste catalyst of a Zinc Industry Co., Ltd.-vanadium catalyst was leached by horizontal oscillation method (HJ557-2010), the toxic leaching method of solid waste leaching. The test showed that pH<1, the leaching concentration of vanadium was 1.21g / L, and the concentration of arsenic and mercury was 1.21g / L. The leaching concentrations were 158mg / L and 0.699mg / L respectively.

[0027] At room temperature, weigh 200g of various heavy metal-contaminated waste catalysts-vanadium catalysts, add 200mL of water to dissolve for 50min, add 80g of ferrous sulfate, and stir for 15min to react; add 12g of polyferrous sulfate, stir evenly, and let stand for 8min Add quicklime to adjust the pH value of the system to 12, stir evenly for 10 minutes, and finally add 60g of curing agent cement, stir evenly, and cure at room temperature for 21 days.

[0028] Performance test: According to the toxic leaching method of solid waste-horizontal oscillation method (HJ 557-2010), the leachin...

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PUM

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Abstract

The invention discloses a method for disposing waste catalysts-vanadium catalysts polluted by various heavy metals, which belongs to the technical field of hazardous waste treatment and comprises the following steps: adding water to waste catalysts-vanadium catalysts for dissolution experiment, and adding iron salt after a period of time for stirring Reaction, adjust the pH to be alkaline with lime, and finally add cement to solidify and maintain. Using this method to dispose of a variety of heavy metal-contaminated spent catalysts-vanadium catalysts, the treatment agent is cheap and easy to obtain, the disposal volume is large, the process flow is simple, and the operability is strong. The leaching concentration of these materials meets the pollution control standard of hazardous waste landfill (GB 18598‑2001). It solves the disposal problem of waste catalyst-vanadium catalyst for resource utilization, and effectively reduces the environmental pollution and harm of waste catalyst-vanadium catalyst.

Description

technical field [0001] The invention belongs to the technical field of hazardous waste treatment, in particular to a method for disposing of various heavy metal-polluted waste catalysts-vanadium catalysts. Background technique [0002] Vanadium catalyst, also known as catalyst or contact agent, is a catalyst that produces catalytic action through surface contact. The vanadium catalyst uses diatomite (most of which is silicon dioxide) as the carrier, and the main component of the catalytic activity is vanadium pentoxide (V 2 o 5 ), the mass percentage is 5%-10%. V 2 o 5 It is an odorless, toxic orange-yellow or reddish-brown powder with a solubility of 0.07g / L in water. In addition to vanadium pentoxide, the catalyst also contains potassium oxide (K 2 O) or sodium oxide (Na 2 O) as a cocatalyst to increase the activity of the vanadium catalyst. Some vanadium catalysts also contain substances such as tin oxide, antimony oxide, iron oxide, and aluminum oxide. [0003] ...

Claims

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Application Information

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IPC IPC(8): B09B3/00B09B5/00
CPCB09B3/00B09B5/00
Inventor 陈小凤字银翠姜泽标罗劲松史庆龙
Owner 云南大地绿坤环保科技有限公司