Method for enriching valuable metals in waste FCC (fluid catalytic cracking) catalyst

A valuable metal and catalyst technology, applied in the field of valuable metal enrichment of waste FCC catalysts, can solve the problems of environmental pollution, high economic cost, low metal enrichment rate, etc., to promote rapid aggregation and efficient sedimentation, and enhance magnetic properties. , the effect of protecting the environment and sustainable development

Pending Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a useful method for waste FCC waste catalysts to overcome the problems of complex processing technology, low metal enrichment rate, serious environmental pollution and high economic cost in the prior art when recovering valuable metals in waste FCC catalysts. The enrichment method of valence metal V and Ni, which is beneficial to the subsequent recovery and treatment of V and Ni in the spent FCC catalyst, the method has simple process, low production energy consumption and cost, strong regional adaptability, safety and environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] 1) 18kg waste FCC catalyst and 2kgFe 3 o 4 Grinding to Dv(90) by ball mill is 10 μm;

[0065] 2) Add the ground material into 80kg of water and stir evenly to prepare a slurry with a concentration of 20% by weight;

[0066] 3) Under the condition that the magnetic field intensity is 1.5T and the magnetic field gradient on the surface of the magnetic gathering medium is about 100000T / m, the slurry is magnetized. Specifically, the slurry is injected into the magnetic separator for magnetization treatment, and the magnetic separator is controlled The outlet opening, adjust the slurry flow rate to 0.2m 3 / h, so that the slurry is fully magnetized. Stop the slurry injection every 10 minutes. After the slurry no longer flows out, turn off the current, and use 10kg of water to flush some highly magnetic particles adsorbed on the surface of the magnetic medium into the slurry, and cycle like this until the magnetization treatment of all the slurry is completed. ;

[0067] ...

Embodiment 2

[0073] 1) 20kg of spent FCC catalyst was pulverized by impact mill until Dv(90) was 20 μm.

[0074] 2) Add the ground material into 30kg of water to prepare a slurry with a concentration of 40% by weight.

[0075] 3) Carry out the magnetization treatment under the condition that the magnetic field strength is 0.8T, and the magnetic field gradient on the surface of the magnetic gathering medium is about 100T / m. Specifically, inject the slurry into the magnetic separator for magnetization treatment, and control the outlet opening of the magnetic separator. degree, adjust the slurry flow rate to 0.2m 3 / h, so that the slurry is fully magnetized. Stop the slurry injection every 10 minutes. After the slurry no longer flows out, turn off the current, and use 10kg of water to flush some highly magnetic particles adsorbed on the surface of the magnetic medium into the slurry, and cycle like this until the magnetization treatment of all the slurry is completed. ;

[0076] 4) Stir th...

Embodiment 3

[0082] Carry out according to the method for embodiment 1, difference is:

[0083] Step 1) in, the consumption of spent FCC catalyst is 20kg, does not use Fe 3 o 4 ;

[0084] In step 2), water is added to prepare a slurry with a concentration of 30% by weight.

[0085] As a result, the contents of V and Ni in the spent FCC catalyst sample and the sedimentation layer enriched with valuable metals (abbreviated as valuable metal sedimentation layer in the following tables) are shown in Table 3.

[0086] table 3

[0087] Material name V content / weight% Ni content / wt% Spent FCC Catalyst Raw Material 0.75 0.80 Valuable metal sedimentation layer 5.76 9.05

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Abstract

The invention relates to the field of catalyst recovery, and discloses a valuable metal enrichment method of a waste FCC (Fluid Catalytic Cracking) catalyst. The method comprises the following steps: 1) crushing the waste FCC catalyst to obtain a crushed material; 2) mixing the crushed material with water to obtain slurry; 3) carrying out magnetization treatment on the slurry to obtain magnetized slurry; (4) carrying out sedimentation treatment on the magnetized slurry; and 5) separating to obtain a settling layer enriched with valuable metals after settling treatment, and the crushing treatment enables the Dv (90) value of the crushed material to be 25 [mu] m or less. The method is simple in process, low in production energy consumption and cost, high in regional adaptability, safe and environmentally friendly.

Description

technical field [0001] The invention relates to the field of catalyst recovery and utilization, in particular to a valuable metal enrichment method for spent FCC catalysts. Background technique [0002] Catalytic cracking (FCC) catalyst is one of the most used catalysts in petroleum processing. With the continuous recycling of catalysts, metal elements in petroleum crude oil continue to deposit on the catalysts, causing catalyst metal poisoning and catalytic cracking of catalysts. The activity and selectivity are greatly reduced. Therefore, this metal-rich, low-activity and selectivity catalyst must be periodically discharged, thereby forming spent FCC catalyst. [0003] The polluting metals in the spent FCC catalyst mainly include V, Fe, Ni and Cu, etc., among which V and Ni are two kinds of valuable metals with high content and high value. How to recover valuable metals from spent FCC catalysts is of great significance for the utilization of spent catalysts and the devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/00C22B23/00C22B34/22B03C1/01B03C1/02
CPCC22B7/00C22B1/005C22B23/026C22B34/225B03C1/01B03C1/02Y02P10/20
Inventor 赵保槐杨柳于金海任靖周岩陈锐吕岩李柯志胡海强李腾飞
Owner CHINA PETROLEUM & CHEM CORP
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