Method for recycling waste FCC catalyst

A catalyst and resource utilization technology, applied in cement production, etc., can solve the problems of underutilization, polluting the environment, waste FCC, poor compressive strength, etc., and achieves easy storage and long-distance transportation, low production cost, and strong high temperature resistance Effect

Inactive Publication Date: 2019-10-22
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, the existing technology has complicated process, high energy consumption, polluted environment and waste FCC is not fully utilized, and the resulting product has high cost, poor compressive strength, poor high temperature resistance and single use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for recycling waste FCC catalysts. The method described in this embodiment is:

[0034] (1) Mix 20-30wt% spent FCC catalyst, 40-50wt% active material and 30-40wt% solid base activator, stir for 5-10 minutes to obtain geopolymer powder.

[0035] (2) According to the mass ratio of the geopolymer powder:water of 1:0.3~0.4, add the water into the geopolymer powder, stir at 70~80°C for 5~10 minutes, a geopolymer gel was obtained.

[0036] (3) Add the geo-like polymer gel into the mold, then vibrate the geo-like polymer gel in the mold with a vibrating rod for 1-3 minutes or place the mold on a vibrating table and vibrate for 3-5 minutes , and then curing in a curing box for 4 to 10 hours, demoulding, and continuing curing at room temperature for 3 to 5 days to obtain a geopolymer material.

[0037] The active raw material is metakaolin.

Embodiment 2

[0039] A method for recycling waste FCC catalysts. The method described in this embodiment is:

[0040] (1) Mix 25-35wt% spent FCC catalyst, 35-45wt% active material and 25-35wt% solid base activator, stir for 5-10 minutes to obtain geopolymer powder.

[0041] (2) According to the mass ratio of the geopolymer powder:water of 1:0.35~0.45, add the water into the geopolymer powder, stir at 75~85°C for 5~10 minutes, a geopolymer gel was obtained.

[0042](3) Add the geo-like polymer gel into the mold, then vibrate the geo-like polymer gel in the mold with a vibrating rod for 1-3 minutes or place the mold on a vibrating table and vibrate for 3-5 minutes , and then cured in a curing box for 10-18 hours, demolded, and continued curing for 4-6 days at room temperature to obtain a geopolymer material.

[0043] The active raw material is fly ash.

Embodiment 3

[0045] A method for recycling waste FCC catalysts. The method described in this embodiment is:

[0046] (1) Mix 30-40wt% spent FCC catalyst, 30-40wt% active material and 20-30wt% solid base activator, stir for 5-10 minutes to obtain geopolymer powder.

[0047] (2) According to the mass ratio of the geopolymer powder:water of 1:0.4~0.5, add the water into the geopolymer powder, stir at 80~90°C for 5~10 minutes, a geopolymer gel was obtained.

[0048] (3) Add the geo-like polymer gel into the mold, then vibrate the geo-like polymer gel in the mold with a vibrating rod for 1-3 minutes or place the mold on a vibrating table and vibrate for 3-5 minutes , and then curing in the curing box for 18-24 hours, demoulding, and continuing curing at room temperature for 5-7 days to obtain a geopolymer material.

[0049] The active raw material is a mixture of metakaolin and fly ash.

[0050] Compared with the prior art, this specific embodiment has the following positive effects:

[00...

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Abstract

The invention relates to a method for recycling a waste FCC catalyst. According to a technical scheme in the invention, the method comprises the following steps: mixing 20-40% by weight of the waste FCC catalyst, 30-50% by weight of an active raw material and 20-40% by weight of a solid alkali activator and carrying out stirring to obtain geopolymer-like powder, adding water into the geopolymer-like powder according to a mass ratio of the geopolymer-like powder to the water of 1: (0.3-0.5), and carrying out stirring to obtain a geopolymer-like gel; and adding the geopolymer-like gel into a mold, carrying out vibration, then performing maintenance in a maintenance box, carrying out demolding, and continuing maintenance at room temperature for 3-7 days to obtain a geopolymer-like material. The method of the invention has the advantages of simple process, low production cost, low energy consumption, environmental friendliness and sufficient resource utilization. The geopolymer-like material obtained by using the method has large compressive strength, high temperature resistance and high added value, and can be widely used as a novel building decorative material, refractory material and early-strength cementitious material.

Description

technical field [0001] The invention belongs to the technical field of waste FCC catalyst utilization. In particular, it relates to a method for recycling waste FCC catalysts. Background technique [0002] The fluid catalytic cracking (Fluid Catalytic Cracking, FCC) process occupies an important position in the petroleum refining (referred to as oil refining) industry, and the FCC catalyst plays an important role in this process. Since the extracted crude oil usually contains a large amount of heavy metals, during the refining process, the heavy metals in the crude oil will gradually deposit on the FCC catalyst, resulting in reduced catalyst activity, poor product selectivity, molecular sieve structure or even collapse, and complete catalyst deactivation. Due to the deposition of heavy metal elements on the waste FCC catalyst, the waste FCC catalyst was included in the newly released "National Hazardous Waste List" in 2016. The treatment of waste FCC catalyst has brought gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/24
CPCC04B7/243C04B12/005Y02P40/10
Inventor 张一敏张若冰蔡震雷
Owner WUHAN UNIV OF SCI & TECH
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