Method for preparing analcite from loess based on loess plateau

A loess plateau and analcime technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of high energy consumption and high production cost, and achieve the effect of mild reaction conditions, simple and easy process method, and great ecological environment application value

Inactive Publication Date: 2020-04-10
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

In the method and process of analcime synthesis involved in the above-mentioned published patents, its technical characteristics all require high-temperature cal...

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  • Method for preparing analcite from loess based on loess plateau
  • Method for preparing analcite from loess based on loess plateau
  • Method for preparing analcite from loess based on loess plateau

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 10.0g of loess sample, 6.7g of sodium hydroxide, and 0.4g of quartz in 60mL of deionized water, stir for 24h to make it fully mixed; Crystallize at 180°C for 48 hours; then wash the obtained product with acidic water with pH=3 for 3 times, and then wash with deionized water until neutral; finally, wash the product repeatedly with ultrasonic waves, and extract the bottom sediment at 80°C Dry for 18h. The XRD spectrum of the obtained sample is as figure 1 As shown, its SEM photo is shown as figure 2 As shown, the crystallinity of the product is good, and the main crystal form is analcime, and contains a small amount of clay minerals.

Embodiment 2

[0029] Directly take 10g of loess sample and 6.3g of sodium hydroxide in 100mL of deionized water, without adding quartz silicon source, and stir for 12h; Crystallize for 36 hours; then wash the obtained product with acidic water with pH=3 for 3 times, and then wash with deionized water until neutral; the product is not subjected to ultrasonic treatment, and the bottom precipitate is extracted after solid-liquid separation and dried at 80°C 18h. The XRD spectrum of the obtained sample is as image 3 shown.

Embodiment 3

[0031] Take 10g of loess samples, 5.7g of sodium hydroxide, and 0.4g of quartz in 100mL of deionized water, and stir for 6h; then stand and age them for 3h, 6h, 12h, 24h, and 48h respectively, and then put the materials into a closed reactor crystallization at 200°C for 24 hours; then the obtained product was washed three times with acidic water with pH = 3, and then washed with deionized water until neutral; the product was not subjected to ultrasonic treatment, and the bottom layer was extracted after solid-liquid separation The material was dried at 80°C for 18h. The XRD spectrum of the obtained sample is as Figure 4 shown.

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Abstract

The intention discloses a method for preparing analcite by using loess, the crystal type is analcite, and the morphology is a sphere-like polyhedron structure. The method comprises the following steps: uniformly mixing the loess, inorganic alkali, a silicon source and water according to a certain material ratio to obtain silica-alumina gel, aging to obtain an activated precursor, transferring theprecursor to a closed reactor, carrying out hydrothermal crystallization treatment, carrying out solid-liquid separation, washing, and drying to obtain the analcite product. The analcite preparation method provided by the invention is simple and feasible, mild in condition and low in cost, and resource utilization of the loess is realized by taking the loess as a preparation raw material.

Description

technical field [0001] The invention relates to the field of resource utilization of loess on the Loess Plateau and synthesis of porous inorganic materials, in particular to a method for preparing analcime by using loess on the Loess Plateau. [0002] technical background [0003] Loess mainly refers to the yellow silt deposits that were transported by wind during the Quaternary period in the geological era. my country is one of the regions with the widest distribution of loess resources in the world, mainly in the arid and semi-arid areas north of the line connecting Kunlun Mountains, Qinling Mountains, Mount Tai, and Mount Lu, among which the loess of the Loess Plateau is a typical representative. The area of ​​the Loess Plateau is about 640,000 km 2 , except for the rocky mountains, it is almost entirely covered by thick loess. The soil quality of loess is alkaline, and its mineral composition is mainly composed of detrital minerals and clay minerals. The former covers q...

Claims

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Application Information

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IPC IPC(8): C01B39/02
CPCC01B39/02
Inventor 陈洪郑仁基
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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