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Recycling comprehensive utilization process of feldspars

A technology of recycling and feldspar, applied in the new technology field of comprehensive utilization of resources, can solve the problems of low added value of end products, discharge of residue and solid waste, etc., and achieve the effect of low cost and simple production process

Inactive Publication Date: 2016-04-20
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of these materials mostly requires high-energy-consuming processes such as high-temperature calcination or high-temperature alkali fusion. At the same time, the added value of end products is generally low, and some processes will discharge solid waste such as residues.

Method used

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  • Recycling comprehensive utilization process of feldspars
  • Recycling comprehensive utilization process of feldspars

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A resource comprehensive utilization process of feldspar, it comprises the following steps:

[0029] (1) Preparation of zeolite: Mix the ground feldspar and 6mol / L sodium hydroxide solution at a ratio of 1kg:20L, stir and react at 180°C for 16h, then filter and wash the obtained solid with deionized water The product is neutral, and then dried at 110°C to remove moisture to obtain silica-alumina zeolite;

[0030] (2) Acid treatment: Mix the silica-alumina zeolite obtained in step (1) with a 5mol / L HCl solution at a ratio of 1kg:20L, stir and react at 80°C for 6h, then filter and wash with deionized water to obtain The solid product was neutralized, and then dried at 110°C to remove moisture to obtain a mesoporous silica material prepared by a template-free method. The aluminum-containing acidic leaching solution obtained after filtration can be used to extract aluminum and prepare metallic aluminum or mesoporous alumina.

[0031] The specific surface area of ​​the mes...

Embodiment 2

[0033] A resource comprehensive utilization process of feldspar, it comprises the following steps:

[0034] (1) Preparation of zeolite: Mix the ground potassium feldspar and 6mol / L sodium hydroxide solution in a ratio of 1kg:20L, stir and react for 16h at 180°C, and then filter to obtain the solid phase and potassium-containing alkaline solution. The obtained solid product was washed with deionized water to neutrality, and then dried at 110° C. to remove moisture to obtain a silica-alumina zeolite. The obtained potassium-containing alkali solution can be used to extract potassium;

[0035] (2) Acid treatment: Mix the silica-alumina zeolite obtained in step (1) with a 5mol / L HCl solution at a ratio of 1kg:20L, stir and react at 80°C for 6h, then filter and wash with deionized water to obtain The solid product was neutralized, and then dried at 110°C to remove moisture to obtain a mesoporous silica material prepared by a template-free method. Its aluminum-containing acidic le...

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Abstract

The invention relates to the fields of resource application of feldspars and preparation of a mesoporous silicon oxide material, and in particular relates to a recycling comprehensive utilization process for preparing the mesoporous silicon oxide material by using feldspars and extracting metal elements in the feldspars. The process comprises the following steps: (1) synthesizing zeolite: synthesizing silica-alumina zeolite by using feldspars directly; and (2) carrying out acid treatment: enabling the zeolite obtained in the step (1) to react with an acid solution, thoroughly destroying a crystal structure of the zeolite by virtue of the acid treatment, leaching out the metal elements in components of the zeolite, then carrying out solid-liquid separation to obtain a solid phase and an acid solution containing aluminum, and washing and drying the solid phase to obtain the mesoporous silicon oxide material of which the specific surface area is 450-650m<2> / g and the most probable pore size is 3.5-4.5nm. The acid solution containing aluminum, which is obtained after filtration, can be used for extracting aluminum so as to prepare a metal aluminum material or mesoporous aluminum oxide.

Description

technical field [0001] The invention relates to the fields of resource utilization of feldspar and preparation of mesoporous silicon oxide materials, in particular to a new technology for resource utilization and comprehensive utilization of feldspar to prepare mesoporous silicon oxide material and to extract metal elements in the feldspar. Background technique [0002] Feldspar is one of the most common minerals in the continental crust, accounting for up to 60% of the crust. Feldspar is a kind of aluminosilicate, its main components are Si and Al, and it also contains Na, K, Ca, Ba and a small amount of Li, Rb, Cs, etc. At present, feldspar is mainly used to prepare construction materials such as ceramics, glass, enamel, abrasives, and fired cement, as well as to process and produce potassium fertilizer, white carbon black, and zeolite. However, the preparation of these materials mostly requires high-energy-consuming processes such as high-temperature calcination or high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12C01F7/02C22B21/00C22B3/10B82Y40/00
CPCC22B3/10C22B21/0007C22B21/0015C01B33/12C01F7/02C01P2004/64C01P2006/17Y02P10/20
Inventor 李天天舒杼周俊
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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