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Process for synthesis of nano mordenite molecular sieve

A synthesis method, the technology of denzeolite, which is applied in the field of synthesis of nano-mordenite molecular sieves, can solve the problems of high cost, slow progress, and environmental pollution, and achieve the effect of reducing synthesis cost, less pollution, and good catalytic performance

Inactive Publication Date: 2006-09-27
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This synthesis method requires the use of organic ammonium ion compounds as templates, which is costly and pollutes the environment.
In the field of nano-mordenite molecular sieves, the progress of synthetic research is relatively slow

Method used

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  • Process for synthesis of nano mordenite molecular sieve
  • Process for synthesis of nano mordenite molecular sieve
  • Process for synthesis of nano mordenite molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First take 5 ml of silica sol solution (SiO 2 : 30wt%, Qingdao Marine Chemical Co., Ltd. provides), 2 milliliters of deionized water, 0.7 milliliters of concentration is (8.036mol / l) sodium hydroxide solution mixes evenly and stirs 1.5 hours; Then get the same sodium hydroxide solution of 0.81 milliliters of concentrations, 1 ml of deionized water and 0.325 g of sodium metaaluminate (Al 2 o 3 : 41wt%, Na 2 (2: 30wt%) and mix evenly, add the sodium metaaluminate solution to the evenly dispersed silica sol solution, then add 5.3 milliliters of deionized water, stir vigorously continuously for 1 hour, add 3.48 grams of sodium chloride, and continue stirring until after 1 hour , add 0.163g mordenite molecular sieve powder as crystal seed, continue to stir for 45 minutes and measure the pH value at about 13, the molar composition of the crystallization reaction system is:

[0027] Na 2 O:NaCl:Al2 o 3 : SiO 2 :H 2 O=3:30:1:15:390 Stirring and aging at room temperature ...

Embodiment 2

[0029] First take 5 ml of silica sol solution (SiO 2 : 30wt%, provided by Qingdao Ocean Chemical Co., Ltd.), 2 milliliters of deionized water, 1 milliliter of concentration is (8.036mol / l) sodium hydroxide solution mixes evenly and stirs 1.5 hours; Then get the same sodium hydroxide solution of 1.12 milliliters of concentrations, 1 ml of deionized water and 0.325 g of sodium metaaluminate (Al 2 o 3 : 41wt%, Na 2 (2: 30wt%) and mix evenly, add the sodium metaaluminate solution to the uniformly dispersed silica sol solution, then add 2.2 ml of deionized water, stir vigorously for 1 hour, add 3.48 grams of sodium chloride, and continue stirring until after 1 hour , add 0.131g mordenite molecular sieve powder as the seed crystal, continue stirring for 60 minutes and then measure the pH value at about 13.5, the molar composition of the crystallization reaction system is:

[0030] Na 2 O:NaCl:Al 2 o 3 : SiO 2 :H 2 O = 4.2: 30: 1: 15: 270 Stirring and aging at room temperatur...

Embodiment 3

[0032] First take 5 ml of silica sol solution (SiO 2 : 30wt%, Qingdao Marine Chemical Co., Ltd. provides), 2 milliliters of deionized water, 0.7 milliliters of concentration is (8.036mol / l) sodium hydroxide solution mixes evenly and stirs 1.5 hours; Then get the same sodium hydroxide solution of 0.81 milliliters of concentrations, 1 ml of deionized water and 0.244 g of sodium metaaluminate (Al 2 o 3 : 41wt%, Na 2 (2: 30wt%) and mix evenly, add the sodium metaaluminate solution to the uniformly dispersed silica sol solution, then add 3.2 ml of deionized water, stir vigorously for 1 hour, add 4.64 grams of sodium chloride, and continue stirring until after 1 hour , add 0.141g mordenite molecular sieve powder as the seed crystal, continue to stir for 45 minutes and measure the pH value at about 12.5, the molar composition of the crystallization reaction system is:

[0033] Na 2 O:NaCl:Al 2 o 3 : SiO 2 :H 2 O=3:40:1:20:330 Stir and age at room temperature for 4 hours, tran...

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Abstract

The inventon discloses a method of Nanomercerization zeolite molecular sieve. Containing steps as follows: magnetic stirring and dispersing the silicasol in strong caustic lye for a period of time, mixing the even dispersed silicon fountain and aluminium fountain to glue in room temperature, taking common mercerization zeolite molecular sieve powder as seed crystal, natrii chloridum or sulfuric acid disodium metal salt as additive, strong magnetic stirring aging for 2-6h in room temperature, low temperature ageing for 3-24h in 100Deg C, and then crystallization in 130-150Deg C, the crystallization time is 22-80h, the pH value of reaction system>12, finally collecting naonodimension mercerization zeolite molecular sieve from reaction product.

Description

technical field [0001] The invention relates to the synthesis of zeolite molecular sieves, in particular to a synthesis method of nanometer mordenite molecular sieves. Specifically, it is a method for synthesizing nanometer mordenite molecular sieves by adding metal salts as nucleation accelerators and adjusting synthesis conditions without using organic ammonium as a template. Background technique [0002] Nanotechnology is a high-tech technology born in the 1980s. Nanoparticles refer to particles with a particle diameter ranging from 0.1 to 100nm. The ratio of the number of atoms on the surface of nanomaterials to the total number of atoms in the bulk increases sharply with the decrease of particle size, showing obvious volume effect, surface effect and quantum size effect. It is a new material with unique physical and chemical properties. . [0003] As a new type of nanomaterial, nano zeolite has attracted much attention. This is mainly due to the fact that nano molecu...

Claims

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Application Information

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IPC IPC(8): C01B39/26B82B3/00
Inventor 邢淑建项寿鹤
Owner NANKAI UNIV
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