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Method for preparing polyaluminum chloride and water glass by using FCC spent catalyst

A technology of polyaluminum chloride and waste catalyst, which is applied in chemical instruments and methods, preparation/treatment of aluminum chloride and rare earth metal compounds, etc. Emissions, the effect of improving resource utilization

Inactive Publication Date: 2020-10-23
3R ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all have the problem of low utilization rate of elements in FCC waste catalyst and ineffective utilization of silicon element

Method used

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  • Method for preparing polyaluminum chloride and water glass by using FCC spent catalyst
  • Method for preparing polyaluminum chloride and water glass by using FCC spent catalyst
  • Method for preparing polyaluminum chloride and water glass by using FCC spent catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of method utilizing FCC spent catalyst to prepare polyaluminium chloride and water glass is characterized in that, comprises the following steps:

[0039] S1. Get 350g FCC waste catalyst, add 600g8% sulfuric acid, filter and separate after stirring at room temperature for 1h to obtain 630g of the first filtrate and 320g of the first filter residue;

[0040] S2. add 10g sodium sulfate solid in the first filtrate of 630g, filter and separate after stirring reaction 2h and obtain 18g rare earth sulfate double salt product;

[0041] S3. Add 2000g16% hydrochloric acid solution to 320g of the first filter residue, react for 3 hours at 140°C and 0.3MPa, filter and separate to obtain 2190g of the second filtrate and 130g of the second filter residue;

[0042]S4. Add 15g sodium sulfide solid in the second filtrate of 2190g, stir and react at 60°C for 2h, obtain the third filter residue of 35g and the third filtrate of 2190g after filtration;

[0043] S5. obtain 11g nicke...

Embodiment 2

[0047] A kind of method utilizing FCC spent catalyst to prepare polyaluminium chloride and water glass is characterized in that, comprises the following steps:

[0048] S1. Take some spent FCC catalysts, add 8% sulfuric acid solution according to the solid-to-liquid ratio of 7:12, stir at room temperature for 1 hour and then filter and separate into the first filtrate and the first filter residue;

[0049] S2. in the first filtrate, add sulfate solid according to solid-to-liquid ratio 1:63, after stirring reaction 2h, filtration separation obtains the rare earth sulfate double salt solid that content is more than 90%;

[0050] S3. Add 16% hydrochloric acid solution to the first filter residue according to the solid-to-liquid ratio of 4:25, react at a pressure of 0.3 MPa and a temperature of 140°C for 3 hours, and obtain the second filtrate and the second filter residue after filtration and separation;

[0051] S4. Add sulfide solids to the second filtrate according to the soli...

Embodiment 3

[0060] A kind of method utilizing FCC spent catalyst to prepare polyaluminium chloride and water glass is characterized in that, comprises the following steps:

[0061] S1. Take some spent FCC catalysts, add 10% sulfuric acid solution according to the solid-to-liquid ratio of 1:1.5, stir at room temperature for a period of time, filter and separate into the first filtrate and the first filter residue;

[0062] S2. in the first filtrate, add sulfate solid according to solid-to-liquid ratio 1:10, after reacting for a period of time, filter and separate to obtain the rare earth sulfate double salt solid that content is more than 90%;

[0063] S3. Add 30% hydrochloric acid solution to the first filter residue according to the solid-to-liquid ratio of 1:3, react for 3 hours at a pressure of 0.3 MPa and a temperature of 110-170°C, and obtain the second filtrate and second filter residue after filtration and separation;

[0064] S4. Add sulfide solids to the second filtrate according...

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Abstract

The invention provides a method for preparing polyaluminum chloride and water glass by using an FCC spent catalyst, which comprises the following steps: adding a sulfuric acid solution into a certainamount of the FCC spent catalyst, and filtering and separating to obtain a first filtrate and first filter residues; adding a sulfate solid into the first filtrate, and filtering and separating to obtain a sulfate rare earth double salt solid; adding a hydrochloric acid solution into the first filter residues, and filtering and separating to obtain a second filtrate and second filter residues; adding sulfide solid into the second filtrate, and filtering and separating to obtain third filtrate and third filter residues; adding a calcium-containing compound into the third filtrate, and filteringto remove solid residues to obtain a polyaluminum chloride product; and adding a sodium hydroxide solution into the second filter residues, and filtering to remove residual solid impurities to obtaina water glass product. The method provided by the invention can effectively improve the utilization rate of high-content elements aluminum and silicon in the FCC spent catalyst, recover and enrich rare earth and precious metal elements lanthanum, cerium, vanadium and nickel in the FCC waste catalyst, and reduce the generation of secondary solid wastes.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of solid waste, and in particular relates to a method for preparing polyaluminum chloride and water glass by utilizing FCC waste catalyst. Background technique [0002] FCC catalyst is an important part of the refining process, and most refineries use catalytic cracking technology to refine crude oil. The carrier of the catalyst is mainly molecular sieve (the main components are silicon dioxide and aluminum oxide), and the catalytic active materials are rare earth elements such as lanthanum and cerium. After the catalyst has been used for a period of time, its activity decreases due to wear and metal pollution (mainly nickel, iron, vanadium) in the oil, and it needs to be discharged from the system. This part is the FCC spent catalyst. At present, most of the spent FCC catalysts are mainly disposed of by landfill after removal of toxic and harmful metals. [0003] The current published...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56C01B33/32C01F17/30C01G53/11C01F17/10C22B7/00C22B59/00C22B34/22C22B23/00
CPCC01F7/56C01B33/32C01F17/30C01G53/11C01F17/10C22B7/009C22B59/00C22B34/225C22B23/0461C01P2002/72C01P2006/10Y02P10/20
Inventor 何文博吴少聪黄真樊文星
Owner 3R ENVIRONMENTAL TECH CO LTD