Method for preparing high-silicon mordenite by using raw mineral material

A technology of mordenite and mineral raw materials, applied in the direction of mercerized crystalline aluminosilicate zeolite, crystalline aluminosilicate zeolite, etc., can solve problems such as equipment corrosion, catalysts cannot be recycled, separation difficulties, etc., and achieve the effect of low cost

Inactive Publication Date: 2010-08-18
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This mordenite solid acid catalyzes the selective synthesis of 5-hydroxymethylfurfural from fructose, which will solve the problems that hinder indus...

Method used

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  • Method for preparing high-silicon mordenite by using raw mineral material
  • Method for preparing high-silicon mordenite by using raw mineral material
  • Method for preparing high-silicon mordenite by using raw mineral material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Utilize mineral raw material to prepare the method for high silicon mordenite, it comprises the steps:

[0029] Dissolve 4.93g of ammonium fluoride in 70mL of water, add 5g of kaolin, 5g of activated silica powder, 23.67g of sodium metasilicate nonahydrate and 10mL of 4mol / L sodium hydroxide solution, stir and dissolve at 70°C; then Add SiO 2 Content 31% silica sol 49.2mL and 17mL tetraethylammonium hydroxide solution (content 25wt%), stir respectively 30min to make it mix homogeneously [in this embodiment: the SiO of silicon source 2 : Al of aluminum source 2 o 3 : inorganic base: fluoride: templating agent: the mol ratio of water=25: 1: 2.2: 7.4: 1.6: 402], obtain initial gel mixture; Initial gel mixture is adjusted pH value to 12.5 with sodium hydroxide and hydrochloric acid, It was transferred to a pressure-resistant reactor for static crystallization at 180°C for 60h. After the crystallization was completed, the reactor was naturally cooled to room temperature....

Embodiment 2

[0031] Dissolve 6.13g of ammonium fluoride in 60mL of water, add 5g of kaolin, 23.6g of sodium metasilicate nonahydrate and 8mL of 4mol / L sodium hydroxide solution, stir and dissolve at 70°C; then add SiO 2Content 31% silica sol 74mL and 17mL tetraethylammonium hydroxide solution, stir respectively 30min to make it mix homogeneously [in this embodiment: the SiO of silicon source 2 : Al of aluminum source 2 o 3 : inorganic base: fluoride: template agent: the molar ratio of water=27: 1: 2: 9.2: 1.6: 435] to obtain the initial gel mixture. The pH value was adjusted to 12 with sodium hydroxide and hydrochloric acid, and transferred to a pressure-resistant reactor for static crystallization at 180° C. for 60 h. After the crystallization was completed, the reactor was naturally cooled to room temperature. The product is filtered, washed until the pH value is 8, and dried to obtain the original powder of mordenite. Put the raw mordenite powder into a muffle furnace and roast at a...

Embodiment 3

[0033] Dissolve 5g of ammonium fluoride in 30mL of water, add 5g of coal gangue, 47.3g of sodium metasilicate nonahydrate and 10mL of 3mol / L sodium hydroxide solution, stir and dissolve at 70°C; then add SiO 2 Content 31% silica sol 50mL and 17mL tetraethylammonium hydroxide solution, stir respectively 30min to make it mix homogeneously [in this embodiment: the SiO of silicon source 2 : Al of aluminum source 2 o 3 : inorganic base: fluoride: template agent: the molar ratio of water=33:1:2.1:9.6:2.1:415], get initial gel mixture; Initial gel mixture is adjusted pH value to with sodium hydroxide and hydrochloric acid 12.5, transfer it to a pressure-resistant reactor for static crystallization at 180°C for 60h. After the crystallization was completed, the reactor was naturally cooled to room temperature. The product is filtered, washed until the pH value is 8, and dried to obtain the original powder of mordenite. Put the raw mordenite powder into a muffle furnace and roast at...

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Abstract

The invention relates to a method for preparing high-silicon mordenite by using a low-cost raw mineral material. The method for preparing the high-silicon mordenite by using the raw mineral material is characterized by comprising the following steps of: 1) selecting SiO2 of a silicon source, Al2O2 of an aluminum source, an inorganic base, a fluoride, a template agent and water in a mole ratio of the SiO2 of the silicon source to the Al2O2 of the aluminum source to the inorganic base to the fluoride to the template agent to the water of (20-50):1:(2-5):(5-10):(1.5-6):(300-600); 2) mixing and pulping the aluminum source, the silicon source, the inorganic base, the fluoride and the template agent with the water, stirring and mixing the mixture at the temperature form the room temperature to 80 DEG C to form a glue so as to obtain an initial gel mixture; adjusting the pH value of the initial gel mixture to between 11 and 13; performing a hydrothermal crystallization synthetic reaction in a reaction kettle under a condition that the temperature is between 160 and 180 DEG C and the crystallization is performed for 48 to 70 hours to obtain a crystallization product; and filtering, washing and drying the crystallization product, then baking the crystallization product for 5 to 10 hours at 500 DEG C, and demoulding the baked crystallization product to obtain the high-silicon mordenite. The method has the characteristic of low cost.

Description

technical field [0001] The invention relates to a method for preparing high-silicon mordenite by using cheap mineral raw materials. Background technique [0002] In the direction of environmental protection and green chemistry, making full use of the renewable and degradable characteristics of biomass resources and making them into important industrial raw materials through chemical synthesis is an effective means to solve resource crisis and environmental pollution. From the perspective of national strategy and economic security, the development of new, environmentally friendly non-petroleum energy and renewable energy is becoming a research hotspot. 5-Hydroxymethylfurfural is an important organic chemical raw material. It is aromatic alcohol and aromatic aldehyde in structure and has a furan ring (two double bonds) system. It has pharmaceutical activity, high reactivity and polymerization ability. It can be oxidized, Reactions such as hydrogenation, chlorination, digestio...

Claims

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Application Information

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IPC IPC(8): C01B39/26
Inventor 沈翔王焰新陈国全周俊李锐
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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