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Method for preparing molecular sieve by using Hangjin 2# soil as raw material and prepared molecular sieve

A molecular sieve and raw material technology, applied in the field of preparation methods and molecular sieves prepared by the method, can solve problems such as insufficient technology, and achieve the effects of saving industrial-grade raw materials, good effect and high cost performance.

Active Publication Date: 2012-08-01
内蒙古天德科技发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current technology for preparing zeolite molecular sieves from Hangjin 2# soil is not perfect, especially the related technology of using Hangjin 2# soil to prepare high-purity P-type zeolite molecular sieves

Method used

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  • Method for preparing molecular sieve by using Hangjin 2# soil as raw material and prepared molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1. Mix Hangjin 2# soil 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, and mix the obtained roasted product with water at a liquid-solid mass ratio of 5:1. The resulting mixed solution was continuously stirred at 70° C. at a speed of 300 rpm for 4 hours, then filtered, and aluminum sulfate solution was added to the filtrate to adjust the molar ratio of silicon-aluminum atoms in the filtrate to 5.0, and then at room temperature at 300 rpm. Stir continuously at high speed 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 was 54.8%.

Embodiment 2

[0036] Example 2. Mix Hangjin 2# soil 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, and mix the obtained roasted product with water at a liquid-solid mass ratio of 5:1. The resulting mixture was continuously stirred at 80°C at a speed of 300 rpm for 4 hours, then filtered, and aluminum sulfate solution was added to the filtrate to adjust the molar ratio of silicon to aluminum atoms in the filtrate to 6.0, and then at room temperature at 300 rpm Stir continuously at high speed 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 was 54.5%.

Embodiment 3

[0037]Example 3. Mix Hangjin 2# soil and sodium hydroxide at a weight ratio of 1:1, and then roast at a constant temperature of 500°C for 90 minutes after mixing, and mix the obtained roasted product with water at a liquid-solid mass ratio of 5:1. The resulting mixture was continuously stirred at 60° C. at a speed of 300 rpm for 4 hours, then filtered, and aluminum sulfate solution was added to the filtrate to adjust the molar ratio of the silicon-aluminum atoms in the filtrate to 4.0, and then at room temperature at 300 rpm. Stir continuously at high speed for 30 minutes, then crystallize at 120°C for 4 hours, then cool the crystallized product, filter, wash with water until the pH is 10, and dry at 110°C, the purity of the P-type zeolite molecular sieve obtained is 94.2% , and the output rate was 56.7%.

[0038] Only list the SiO in the selected Hangjin 2# soil in the embodiment 4~7 2 content, and the content of other ingredients is omitted.

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Abstract

The invention relates to a method for preparing a molecular sieve by using Hangjin 2# soil as a raw material and a prepared molecular sieve. The method is used for preparing the molecular sieve by taking the Hangjin 2# soil as the raw material and taking sodium hydroxide as an activating agent through an alkali melting method. The method comprises the following specific steps of: (1), after mixing the Hangjin 2# soil with sodium hydroxide according to a certain proportion, roasting and activating; (2), after grinding a roasted product, mixing the roasted product with water or directly mixing the roasted product with water to prepare a mixed solution, and adjusting the mol ratio of silicon atoms to aluminium atoms of the mixed solution to 2.5-6.0 by adding or not adding aluminium sulphate; and (3), crystallizing the mixed solution prepared in the step (2), wherein the mol ratio of silicon atoms to aluminium atoms of the mixed solution meets with requirements. According to the invention, the method is simple and feasible; the material for preparing the molecular sieve comes from a variety of sources; the preparation cost of the molecular sieve is low; the purity of the molecular sieve (P type zeolite molecular sieve) disclosed by the invention is above 90%; and the method can be widely applied in the fields, such as environment protection, metallurgy, chemical industry, electronics, petrochemical engineering, natural gas and the like, in particular water treatment of denitrification and dephosphorization.

Description

technical field [0001] The present invention relates to a method for preparing molecular sieves and molecular sieves prepared by the method, especially a method for preparing molecular sieves with Hangjin 2# soil as raw material and P-type zeolite molecular sieves prepared by this method, which can realize Hangjin Comprehensive utilization of 2# soil. Background technique [0002] Hangjin 2# soil is a new type of rare earth element containing attapulgite, illite, chlorite, feldspar, and calcite, which were discovered in Hangjin Banner, Ordos City, Inner Mongolia Autonomous Region in the late 1990s. Composite clay. The preliminary exploration reserves are 8.25 million tons, the census reserves are 340 million tons, concentrated in 20 to 30 square kilometers, and the prospective reserves are 1 billion tons. Hangjin 2# soil is brownish red, and the soaked slurry is "jelly-like", difficult to dehydrate, with small natural particle size, large specific surface area, good adsorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02
Inventor 席北斗赵颖夏训峰张列宇牛永超管伟雄董志刚
Owner 内蒙古天德科技发展股份有限公司
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