Method for preparing molecular sieve by taking oxidized stone as raw material

A technology of molecular sieve and oxide stone, which is applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of no synthetic molecular sieve application, limited source of raw materials, high porosity of ore, etc., and achieve unique selective adsorption performance, good effect and high purity Effect

Inactive Publication Date: 2016-01-27
刘柏海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Opal is produced in Henan, Shaanxi, Yunnan, Anhui, Jiangsu, and Heilongjiang in my country. Opal is a natural hardened silica gel containing 5-10% water. Unlike most gemstones, opal is amorphous. Due to the loss of water in the gemstone, it gradually dries and cracks appear; opal belongs to the opal class in mineralogy, and is a gemstone with a color-changing effect. It is a water-containing amorphous silica; its ore has a high porosity. Strong water absorption, good adsorption, can adsorb toxic and harmful substances or elements such as chloride, nitrite, cyanide, Pb an

Method used

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Examples

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Example Embodiment

[0025] Example 1:

[0026] Mix opal light and sodium hydroxide at a weight ratio of 1:1.2, and then roast at a constant temperature of 550°C for 90 minutes after mixing. Continue stirring at a speed of 300 rpm for 4 hours, then filter, add aluminum sulfate solution in the filtrate to adjust the molar ratio of silicon to aluminum atoms in the filtrate to 5.0, and then continue stirring at a speed of 300 rpm at room temperature for 30 minutes. Then crystallize at 130°C for 5 hours, then cool the crystallized product, filter, wash with water until the pH is 10, and dry at 110°C. The purity of the obtained P-type zeolite molecular sieve is 95.2%, and the output rate is 54.8% %.

Example Embodiment

[0027] Example 2

[0028] Mix opal light and sodium hydroxide at a weight ratio of 1:1.3, and then roast at a constant temperature of 600°C for 90 minutes after mixing. Continue stirring at a speed of 300 rpm for 4 hours, then filter, add aluminum sulfate solution in the filtrate to adjust the molar ratio of silicon to aluminum atoms in the filtrate to 6.0, then continue stirring at a speed of 300 rpm at normal temperature for 30 minutes, Then crystallize at 140°C for 5 hours, then cool the crystallized product, filter, wash with water until the pH is 10, and dry at 110°C. The purity of the obtained P-type zeolite molecular sieve is 96.3%, and the output rate is 54.5% %.

Example Embodiment

[0029] Example 3

[0030] Mix opal light and sodium hydroxide in a weight ratio of 1:1, and then roast at a constant temperature of 500°C for 90 minutes after mixing. Continue stirring at a speed of 300 rpm for 4 hours, then filter, add aluminum sulfate solution to the filtrate to adjust the molar ratio of silicon to aluminum atoms in the filtrate to 4.0, and then continue stirring at a speed of 300 rpm at room temperature for 30 minutes, and then at 120 ° C After crystallization for 4 hours, the crystallized product was cooled, filtered, washed with water until the pH was 10, and dried at 110°C. The purity of the obtained P-type zeolite molecular sieve was 94.2%, and the yield was 56.7%.

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Abstract

The invention discloses a method for preparing a molecular sieve by taking oxidized stone as a raw material. The method comprises the particular steps of: (1) mixing light opal and sodium hydroxide according to a certain proportion, roasting and activating, (2) grinding a roasted product obtained by roasting, mixing with water, or directly mixing with the water into a mixed solution, filtering the mixed solution to form filtrate or carrying out no filtration, adjusting a silicon-aluminum atom mole ratio of the mixed solution or the filtrate to 2.5-6.0 by adding or not adding aluminum sulfate, (3) crystallizing the mixed solution or the filtrate with the satisfactory silicon-aluminum atom mole ratio prepared in Step (2), and (4) after pretreatment, treating a zeolite filter column filled with the molecular sieve for water power retention time of 1.5h to be capable of reducing an ammonia nitrogen content in the water from 20.1mg/L to 0.02mg/L, wherein the molecular sieve is a P-type zeolite molecular sieve and has the purity of above 90%. The molecular sieve has particularly strong selective absorbability, very high purity and has a good effect of synchronous removal of nitrogen and phosphorus.

Description

technical field [0001] The invention relates to a method for preparing molecular sieves, in particular to a method for preparing molecular sieves by using rock oxide as a raw material, and belongs to the technical field of molecular sieves. Background technique [0002] Opal is produced in Henan, Shaanxi, Yunnan, Anhui, Jiangsu, and Heilongjiang in my country. Opal is a natural hardened silica gel containing 5-10% water; opal is different from most gemstones and is amorphous. Due to the loss of water in the gemstone, it gradually dries up and cracks appear; opal belongs to the opal class in mineralogy, and is a gemstone with a color-changing effect. It is a water-containing amorphous silica; its ore has a high porosity. Strong water absorption, good adsorption, can adsorb toxic and harmful substances or elements such as chloride, nitrite, cyanide, Pb and Hg, and has good decolorization and bleaching performance, and can also release negative ions, which can be directly applied...

Claims

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Application Information

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IPC IPC(8): C01B39/02
Inventor 刘柏海
Owner 刘柏海
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