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Treatment method for waste catalytic cracking catalyst, obtained silicon-aluminum material and application of silicon-aluminum material

A technology of catalytic cracking and silicon-aluminum materials, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve problems such as limited nickel removal rate

Active Publication Date: 2019-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that even if the acid concentration is high, the removal rate of nickel is limited (<60%), and the acid concentration is greatly increased, which will inevitably lead to the generation of a large amount of waste acid

Method used

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  • Treatment method for waste catalytic cracking catalyst, obtained silicon-aluminum material and application of silicon-aluminum material
  • Treatment method for waste catalytic cracking catalyst, obtained silicon-aluminum material and application of silicon-aluminum material
  • Treatment method for waste catalytic cracking catalyst, obtained silicon-aluminum material and application of silicon-aluminum material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Weigh 100g of spent catalytic cracking catalyst C1 and 500g of sodium carbonate solution with a concentration of 200g / L and mix them uniformly, then stir at 120°C and 1.8Mpa at 500r / min for 2h for impregnation treatment, and then filter to obtain impregnated catalyst. This was added to 500 g of deionized water, stirred at 400 r / min for 30 minutes at 85° C., and washed with water. Then filter to obtain 121g filter cake (dry basis weight, the same below), that is, the catalyst after washing treatment, and the washing treatment leachate is sent to recovery equipment. Add the catalyst after water washing treatment to 500g concentration of 25% by weight hydrochloric acid solution, add 5g ethylenediaminetetraacetic acid (EDTA) at the same time, and carry out acid leaching at 95°C and 400r / min under the pressure of 0.1MPa in a water bath for 120 minutes For treatment, the molar ratio of EDTA to nickel metal in the spent catalytic cracking catalyst is 2:1. Then filter to obtai...

Embodiment 2

[0075] The spent catalytic cracking catalyst was replaced with C2, and treated according to the method of Example 1 to obtain the treated silicon-aluminum material, and its basic chemical composition was tested and listed in Table 2.

Embodiment 3

[0077] Weigh 100g of spent catalytic cracking catalyst C1 and 300g of potassium carbonate solution with a concentration of 280g / L and mix them uniformly, stir at 160°C and 2.6Mpa at 500r / min for 1h for impregnation treatment, and then filter to obtain impregnated catalyst. This was added to 500 g of deionized water, stirred at 400 r / min for 30 minutes at 85° C., and washed with water. Then filter to obtain 115g filter cake, that is, the water-washed catalyst, and the water-washed leachate is sent to a recovery device. The catalyzer after the washing process is added to 500g concentration in the nitric acid solution of 20% by weight, and 6g ammonium sulfate is added simultaneously, and is carried out acid leaching treatment with 400r / min stirring 30 minutes under 85 ℃, water bath 0.1MPa pressure, ammonium sulfate and waste The molar ratio of nickel metal in the catalytic cracking catalyst is 5:1. Then filter to obtain 86g filter cake, which is the catalyst after acid leaching,...

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Abstract

The invention relates to a treatment method for a waste catalytic cracking catalyst, an obtained silicon-aluminum material and application of the silicon-aluminum material. The method comprises the following steps that a, the waste catalytic cracking catalyst and an alkaline solution are mixed and then are dipped at the temperature of 70-220 DEG C, or the waste catalytic cracking catalyst and an alkali-containing material are mixed and then are roasted at the temperature of 500-1000 DEG C so as to obtain a roasted catalyst; b, the dipped catalyst or the roasted catalyst are washed with water for 0.1-3 h so as to obtain a washed catalyst; c, the washed catalyst and acid are mixed and are subjected to acid leaching treatment at the temperature of 50-185 DEG C for 0.1-3 h so as to obtain a catalyst subjected to acid leaching treatment; and d, the catalyst subjected to acid leaching treatment is washed to neutral, and a solid product is collected. According to the method, the contents of nickel and vanadium in the waste catalytic cracking catalyst can be effectively decreased, and the silicon-aluminum material obtained after treatment can be reused as a building material and / or a catalyst carrier material.

Description

technical field [0001] The disclosure relates to a treatment method of a spent catalytic cracking catalyst and the obtained silicon-alumina material and its application. Background technique [0002] Catalytic cracking catalyst is the most widely used catalyst in oil refining process. At present, the amount of catalytic cracking catalyst used in my country is nearly 200,000 tons, about half of which are taken away with flue gas or catalytic oil slurry and cannot be recovered, and about 100,000 tons are produced every year 10,000 tons of spent catalytic cracking catalyst. In the past, the waste catalyst of FCC was mainly buried. The new version of the "National Hazardous Waste List" implemented on August 1, 2016 added 117 types of hazardous wastes, and listed waste catalytic cracking catalysts as hazardous waste HW50, which is strictly prohibited from being discharged. [0003] The core problem of the treatment method of spent catalytic cracking catalyst is demetallization. ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B23/00C22B34/22C22B59/00B09B3/00
CPCC22B7/009C22B7/007C22B23/0415C22B34/225C22B59/00B09B3/80Y02P10/20
Inventor 陈妍郭瑶庆林伟宋海涛达志坚田辉平朱玉霞舒春溪
Owner CHINA PETROLEUM & CHEM CORP
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