Method for preparing P-type molecular sieve and ZSM-5 (Zeolite Socony Mobil-5) molecular sieve from coal ash acid-method extracted aluminum residue and use method of coal ash

A technology for extracting aluminum residue and ZSM-5, which is applied in the direction of borocarbane silicone crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., to achieve considerable environmental benefits, sufficient and efficient consumption, and omission of extraction and separation operations Effect

Active Publication Date: 2017-05-31
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
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Problems solved by technology

[0013] The purpose of the present invention is to solve the problem of how to improve the absorption efficiency of fly ash acidification aluminum extraction residue by preparing molecular sieves, co-produce high-silicon and low-silicon molecular sieves, and how to use fly ash to provide a powdered coal The method of preparing P-type molecular sieve and ZSM-5 type molecular sieve from the residue of aluminum extraction by gray acid method and the utilization method of fly ash

Method used

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  • Method for preparing P-type molecular sieve and ZSM-5 (Zeolite Socony Mobil-5) molecular sieve from coal ash acid-method extracted aluminum residue and use method of coal ash
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  • Method for preparing P-type molecular sieve and ZSM-5 (Zeolite Socony Mobil-5) molecular sieve from coal ash acid-method extracted aluminum residue and use method of coal ash

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preparation example

[0078] This preparation example illustrates the preparation of fly ash to obtain the aluminum extraction residue of fly ash acid method.

[0079] Take 100g of fly ash, add 5mol / L hydrochloric acid solution, stir and react at 150°C for 30min, filter and wash to obtain aluminum-rich solution and fly ash acid extraction aluminum residue.

[0080] The chemical composition of the fly ash acid extraction aluminum residue is shown in Table 2.

Embodiment 1

[0082] (1) Add 50g of fly ash acid extraction aluminum residue to Na 2 CO 3 60g of solid powder, mixed and ground, roasted at 860°C for 90 minutes, cooled rapidly in air after the roasting, and crushed to below about 200 mesh to obtain roasted slag;

[0083] (2) After the roasted slag material is subjected to dry magnetic separation to remove iron, take 70g and add 140ml of deionized water (the amount of water is 200ml relative to 100g of roasted slag material), and carry out water immersion at 100°C and normal pressure for 20min , leaching and dissolving Na in the roasted slag 2 SiO 3 and NaAlSiO 4 , to obtain a solid-liquid mixed water immersion product; where the solid is dissolved Na 2 SiO 3 and NaAlSiO 4 The remaining product after; the liquid is containing Na 2 SiO 3 and NaAlSiO 4 The solution;

[0084] (3) Under high-speed stirring state, get whole water immersion product 100g (convert to containing 70g of calcined slag material), add sodium carbonate solution...

Embodiment 2

[0093] (1) Add 50g of fly ash acid extraction aluminum residue to Na 2 CO 3 65g of solid powder, mixed and ground, roasted at 890°C for 60 minutes, cooled rapidly in air after roasting, and crushed to below about 180 mesh to obtain roasted slag;

[0094] (2) After the roasted slag material is subjected to dry magnetic separation to remove iron, take 70g and add 105ml of deionized water (relative to 100g of roasted slag material, the amount of water is 150ml), and carry out water immersion at 95°C and normal pressure for 18min , leaching and dissolving Na in the roasted slag 2 SiO 3 and NaAlSiO 4 , to obtain a solid-liquid mixed water immersion product; wherein, the solid is dissolved Na 2 SiO 3 and NaAlSiO 4 The remaining product after; the liquid is containing Na 2 SiO 3 and NaAlSiO 4 The solution.

[0095] (3) Under high-speed stirring state, get whole water immersion product 93g (convert to containing calcined slag material 70g), add sodium carbonate solution (rec...

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Abstract

The invention relates to the field of utilization of coal ash acid-method extracted aluminum residues and coal ash, and discloses a method for preparing a P-type molecular sieve and a ZSM-5 (Zeolite Socony Mobil-5) molecular sieve from coal ash acid-method extracted aluminum residues and a use method of coal ash. The method comprises the following steps: (1) performing alkali roasting on the coal ash acid-method extracted aluminum residues so as to obtain a roasted residue material, performing high-temperature water leaching and heat-preservation filtration on the roasted residue material in sequence so as to obtain first filtrate; (2) performing P-type molecular sieve hydrothermal crystallization on the first filtrate so as to obtain a P-type molecular sieve and molecular sieve filtrate; and (3) performing ZSM-5 type molecular sieve hydrothermal crystallization on the molecular sieve filtrate, thereby obtaining the ZSM-5 molecular sieve and second filtrate. By adopting the method, elimination of the coal ash acid-method extracted aluminum residues can be achieved, the utilization rate of the coal ash acid-method extracted aluminum residues can be increased, and the utilization of the coal ash can be improved.

Description

technical field [0001] The present invention relates to the utilization field of fly ash acid method aluminum extraction residue and fly ash, in particular, relates to a method for preparing P-type molecular sieve and ZSM-5 type molecular sieve from fly ash acid method aluminum extraction residue and the utilization of fly ash Use method. Background technique [0002] High-alumina fly ash is a new type of aluminum resource unique to my country, and its prospective resource is about 10 billion tons of alumina. However, the proven bauxite resource reserves in my country are only 3.2 billion tons. According to the current mining scale estimation, the resource guarantee period is only about 20 years, and the current foreign dependence of aluminum resources is as high as 55%. Therefore, the development and utilization of high-alumina fly ash has practical significance for alleviating the shortage of bauxite resources in my country, ensuring the safety of my country's aluminum in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/36C01B39/38C01B39/40
CPCC01B39/36C01B39/38C01B39/40C01P2002/72
Inventor 刘汇东孙琦王宝冬徐文强张中华肖永丰王晓欢
Owner CHNA ENERGY INVESTMENT CORP LTD
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