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Method for synthesizing beta zeolite by templet agent concentrate nonuniform method

A technology of uniform distribution, beta zeolite, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of high production cost and general application, and achieve the effect of being beneficial to industrial application, reducing dosage and reducing cost

Inactive Publication Date: 2007-10-24
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Beta zeolite is a new type of zeolite material with excellent performance. At present, the high production cost is still the main reason restricting its general application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Synthesis of zeolite beta by uniform distribution of template concentration:

[0019] Weigh up to 4.600 grams of tetraethylammonium hydroxide (TEA + Industrial product, concentration is 1.14N), add sodium metaaluminate solid (NaOH, chemical pure reagent, wherein Al 2 o 3 43%), 0.635 gram and 0.267 gram of sodium hydroxide solid (NaOH, chemically pure reagent, purity>95%), dissolve solid reagent under the condition of 70~80 ℃ and be transparent solution, add 5 grams of coarse-pore silica gel (industrial product, 100~200 mesh, dry basis containing SiO 2 96.3%), in the stirring process, add 2.64 grams of triethanolamine auxiliary templating agent (FZMB) again, until stirring evenly, make main and auxiliary templating agent be uniformly distributed state in the system, the composition (by mole) of each feeding material of this synthetic system Ratio) is: SiO 2 / Al 2 o 3 =30,TEA + / SiO 2 =0.064,H 2 O / SiO 2 =2.66, FZMB / SiO 2 = 0.22. Then the homogeneously stirred...

Embodiment 2

[0022] Synthesis of zeolite beta by uneven distribution of template concentration:

example 2

[0023] The synthetic raw material and specification that example 2 adopts are all identical with embodiment example 1, but synthetic method is different, and its concrete steps are as follows:

[0024] Weigh 4.575 grams of tetraethylammonium hydroxide (concentration 1.14N), add 0.254 grams of sodium metaaluminate solid temperature and 0.337 grams of sodium hydroxide solid, dissolve the solid reagent at 70~80 ° C to a transparent solution, add 4 grams Coarse-porous silicon, after stirring evenly, let it stand still as the main part with a higher concentration of the template agent; in addition, in the auxiliary system of a small part of silica gel, the main template agent of tetraethylammonium hydroxide is not added, and the auxiliary template agent of triethanolamine is used instead. The preparation method of its auxiliary part: take 0.127 grams of sodium metaaluminate and 0.0535 grams of sodium hydroxide, add 2.64 grams of liquid triethanolamine (chemical reagent, content not ...

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Abstract

a process for synthesizing beta-zeolite by means of non-uniform concentration template agent features that the synthetic system is divided into two parts, the main part and the subsidiary part. The composition of main part is of SiO2 / Al2O3=20-100, TEA+ / SiO2=0.06-0.15, Na2O / SiO2=0.04-0.11, H2O / SiO2=2.0-8.0; the composition of subsidiary part is SiO2 / Al2O3=20-60, FZMB / SiO2=0-0.25, Na2O / SiO2=0.04-0.11, H2O / SiO2=2.0-6.0. Mixing the two parts and crystallizing at a temperature of 140-170 deg.C for 24-48 hours, washing, filtering, drying, high crystallinity beta-zeolite is obtained.

Description

technical field [0001] The present invention relates to a method for synthesizing zeolite beta by the method of non-uniform distribution of template concentration. The present invention mainly relates to the crystallization of zeolite beta in a synthetic system in which the template agent for synthesizing zeolite beta is unevenly distributed, and the relative crystallinity can be obtained. For the high-beta zeolite product, the amount of template agent can be greatly reduced, and the beta zeolite with high performance and price ratio can be prepared. Background technique [0002] Beta zeolite was first synthesized by the American Mobil Company in 1967 by the classic hydrothermal crystallization method (USP3308069). Beta zeolite has complex structure, crystal particle size ≤0.5μm, high silicon-aluminum ratio and better thermal and acid stability. It is a very effective catalyst in petroleum refining and petrochemical processes such as hydrogenation, cracking, dewaxing, alkyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04
Inventor 潘惠芳李丽李文兵谢传欣沈志虹申宝剑李淑云
Owner PETROCHINA CO LTD
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