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Comprehensive utilization method of aluminum-silicon-based waste catalyst

A technology of waste catalyst and aluminum silicon, applied in chemical instruments and methods, nickel compounds, alumina/aluminum hydroxide, etc., can solve the problems of low added value of products, low comprehensive utilization rate of FCC waste catalysts, etc., and achieve outstanding environmental protection benefits , Easy to achieve the effect of industrialization and strong industrial control

Pending Publication Date: 2022-05-17
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods all have the problems of low comprehensive utilization rate of FCC waste catalyst and low added value of products.

Method used

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  • Comprehensive utilization method of aluminum-silicon-based waste catalyst
  • Comprehensive utilization method of aluminum-silicon-based waste catalyst
  • Comprehensive utilization method of aluminum-silicon-based waste catalyst

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Experimental program
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Effect test

Embodiment 1

[0030] The comprehensive utilization method of the aluminum-silicon-based waste catalyst of the present embodiment comprises the following steps:

[0031] Table 1 Chemical composition analysis of catalytic cracking spent catalyst

[0032]

[0033] (A) Roasting the aluminum-silicon-based waste catalyst to obtain a roasted product; leaching the roasted product with a low caustic concentration lye for pre-desilication, separating the liquid from the solid and washing the obtained solid to obtain a pre-desilication solution and a pre-desilication solution respectively. Desiliconization slag; in the step (A) of the present embodiment: the chemical composition of the aluminum-silicon-based spent catalyst is as shown in Table 1 Waste Agent 1, the roasting temperature is 800°C, the roasting time is 3h, and the low caustic concentration lye The concentration of sodium oxide is 100g / L; the leaching pre-desiliconization slurry formed after the roasted product is mixed with low caustic...

Embodiment 2

[0040] The comprehensive utilization method of the aluminum-silicon-based waste catalyst of this embodiment comprises the following steps:

[0041] (A) Roasting the aluminum-silicon-based waste catalyst to obtain a roasted product; leaching the roasted product with a low caustic concentration lye for pre-desilication, separating the liquid from the solid and washing the obtained solid to obtain a pre-desilication solution and a pre-desilication solution respectively. Desiliconization slag; in the step (A) of this embodiment: the chemical composition of the aluminum-silicon-based waste catalyst is shown in Table 1 waste agent 2, the roasting temperature is 1000 ° C, the roasting time is 2h, and the low caustic concentration lye is used for implementation The first reaction mother liquor that example 1 obtains; The leaching pre-desilication slurry that forms after roasting product mixes with low caustic concentration lye is 170g / L before the pre-desilication reaction, and the lea...

Embodiment 3

[0047] The comprehensive utilization method of the aluminum-silicon-based waste catalyst of this embodiment comprises the following steps:

[0048] (A) Roasting the aluminum-silicon-based waste catalyst to obtain a roasted product; leaching the roasted product with a low caustic concentration lye for pre-desilication, separating the liquid from the solid and washing the obtained solid to obtain a pre-desilication solution and a pre-desilication solution respectively. Desiliconization slag; in the step (A) of the present embodiment: the chemical composition of the aluminum-silicon-based waste catalyst is as shown in Table 1 Waste Agent 1, the roasting temperature is 1100°C, the roasting time is 1h, and the The concentration of sodium oxide is 200g / L; the leaching pre-desiliconization slurry formed after the roasted product is mixed with low caustic concentration lye has a solid content of 100g / L before the pre-desilication reaction, and the leaching of the pre-desilication slurr...

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Abstract

The invention discloses a comprehensive utilization method of an aluminum-silicon-based waste catalyst, which comprises the following steps: (A) roasting the aluminum-silicon-based waste catalyst to obtain a roasted product; the roasted product and alkali liquor with low caustic alkali concentration are subjected to leaching and pre-desiliconization, liquid-solid separation is conducted, obtained solids are washed, and pre-desiliconization liquid and pre-desiliconization residues are obtained respectively; (B) carrying out high-alkali leaching reaction on the pre-desiliconized slag and high-alkali-concentration alkali liquor, carrying out liquid-solid separation, and washing the obtained solid to respectively obtain high-alkali dissolution liquid and alkali leaching slag; the concentration of sodium oxide in the low-caustic-alkali-concentration alkali liquor is smaller than that of sodium oxide in the high-caustic-alkali-concentration alkali liquor. According to the method, comprehensive utilization of the aluminum-silicon waste catalyst is achieved, main components, namely aluminum oxide and silicon oxide, in the waste catalyst are fully recycled, and calcium silicate, zeolite, aluminum hydroxide and alkaline leaching residues are obtained. And aluminum oxide and silicon oxide in the aluminum-silicon waste catalyst can be effectively recovered.

Description

technical field [0001] The invention relates to the technical field of resource recycling. Specifically, it is a method for recovering aluminum and silicon from aluminum-silicon-based waste catalysts and enriching nickel / lanthanum / cerium and other valuable metals. Background technique [0002] At present, the total processing capacity of catalytic cracking (FCC) in my country exceeds 180 million tons per year, gasoline produced by FCC accounts for more than 60% of the total, and the annual consumption of catalyst exceeds 200,000 tons. During the use of FCC catalyst, due to the reaction between the catalyst and water vapor at high temperature, the specific surface area, pore volume decrease, structural damage or collapse, etc., or the metal poisoning effect in the raw oil causes the activity and selectivity of the catalyst to decay to catalytic cracking If the catalyst is permanently deactivated at unacceptable levels for the process, a portion of the catalyst needs to be pe...

Claims

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Application Information

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IPC IPC(8): C01F7/02C01F7/14C01F17/10C01G53/00C01B33/24
CPCC01F7/02C01F7/14C01B33/24C01G53/00C01F17/10
Inventor 曹绍涛张毅游韶玮
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI