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Method for preparing ceramsite by catalytic cracking of waste catalysts

A waste catalyst, catalytic cracking technology, applied in applications, household utensils, clay products, etc., can solve problems such as hazardous wastes endangering the environment

Inactive Publication Date: 2019-02-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing ceramsite by using catalytic cracking waste catalyst, which can solidify and harmlessly treat the heavy metals in the FCC waste catalyst, and fundamentally solve the basic problem of hazardous wastes endangering the environment, and The prepared ceramsite has high economic value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Experimental conditions: particle size 500 mesh, adding 5gNaOH, 5gNa 2 CO 3 , appropriate amount of water; stirring speed: rotation 285 / min, revolution 125 / min; forming mold: 40*40*160mm; drying at 100°C for 4 hours, roasting at 1000°C for 10 minutes. The leaching toxicity of the obtained ceramsite is reduced from 2.3ppm to 0.15ppm; the apparent density is 2.4kg / m 3 ; The compressive strength is 16MPa.

Embodiment 2

[0030] Experimental conditions: particle size 500 mesh, adding 5gNaOH, 5gNa 2 CO 3 , appropriate amount of water; stirring speed: rotation 285 / min, revolution 125 / min; forming mold: 40*40*160mm; drying at 120°C for 4 hours, roasting at 1000°C for 10 minutes. The leaching toxicity of the obtained ceramsite is reduced from 2.3ppm to 0.14ppm; the apparent density is 2.3kg / m 3 ; The compressive strength is 16MPa.

Embodiment 3

[0032] Experimental conditions: particle size 500 mesh, adding 5gNaOH, 5gNa 2 CO 3 , appropriate amount of water; stirring speed: rotation 285 / min, revolution 125 / min; forming mold: 40*40*160mm; drying at 120°C for 4 hours, and roasting at 1200°C for 10 minutes. The leaching toxicity of the obtained ceramsite is reduced from 2.3ppm to 0.09ppm; the apparent density is 2.4kg / m 3 ; The compressive strength is 18MPa.

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PUM

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Abstract

The invention discloses a method for preparing ceramsite by catalytic cracking of waste catalysts and relates to the technical field of environment-friendly waste utilization. The method solves the technical problem in the prior art that the waste catalysts cannot be reasonably utilized. The method provided by the invention comprises the steps that the waste catalysts, a co-solvent, a foaming agent and water are evenly mixed; the obtained mixed materials are fully stirred; the stirred materials are pelleted; the pelleted materials are dried; the preheated materials are roasted; and the ceramsite obtained by roasting is cooled, sorted and packaged, and thus finished products are obtained. According to the method provided by the invention, heavy metal in the FCC waste catalysts can be subjected to curing harmless treatment, the basic problem that hazardous wastes endanger the environment is fundamentally solved, and the prepared ceramsite has relatively high economic value.

Description

technical field [0001] The invention relates to the technical field of environmental protection waste utilization, in particular to a method for preparing ceramsite by using catalytic cracking waste catalyst. Background technique [0002] In the catalytic cracking unit, due to the pollution of the catalyst by heavy metals, the activity of the catalyst decreases rapidly, which leads to the deterioration of the reaction selectivity of the catalyst. The activity and selectivity of the balancer cannot be maintained only by natural running loss and replenishment of new agents. Therefore, it is necessary to periodically A part of the balancer is discharged to ensure the activity and selectivity level of the catalyst in the device. This unloaded balancer is called catalytic cracking spent catalyst (hereinafter referred to as spent catalyst). Spent catalysts have low activity and contain a certain amount of heavy metals. They are highly polluting and difficult to treat innocuously....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B38/02
CPCC04B33/132C04B33/1328C04B38/009C04B2235/77C04B2235/96C04B38/02C04B38/0067Y02P40/60
Inventor 张志远刘光明丁禄彬
Owner CHINA PETROLEUM & CHEM CORP