Preparation method of DNL-1 molecular sieve

A technology of aluminum phosphate molecular sieve and deionized water, which is applied in the field of molecular sieves, can solve the problems of high price of ionic liquids, difficult to achieve purity, and reduced thermal stability, and achieve the effect of commercially available raw materials, simple methods, and easy operation
CN109574036AActive Publication Date: 2019-04-05DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2019-04-05

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Abstract

The invention discloses a preparation method of a DNL-1 molecular sieve. The method comprises the following steps: 1) mixing an aluminum source, a phosphorus source, R1, R2, hydrofluoric acid and deionized water to obtain a primary mixture; 2) crystallizing the obtained primary mixture for 0.5-96 h at the temperature of 150-220 DEG C to obtain an aluminum phosphate molecular sieve, wherein the molar ratio of Al2O3, P2O5, R1, R2, HF and H2O in the primary mixture is 1: 0.5: 1.5: 5-20: 0.1-1.5: 0.1-2: 8-40; R1 is diethylethanol or triethanolamine; and R2 is selected from one or more of butyl trimethyl ammonium chloride, tetramethyl ammonium chloride, diethylamine and choline chloride. The preparation method of the aluminum phosphate molecular sieve DNL-1 is simple, and is simple and convenient to operate and low in cost, raw materials are commercial and easily obtained, and thus, the aluminum phosphate molecular sieve DNL-1 is suitable for being produced industrially.
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Description

Technical field

[0001] The invention belongs to the field of molecular sieves, and specifically relates to the preparation of aluminum phosphate molecular sieve DNL-1. Background technique

[0002] Molecular sieves are widely used in the fields of catalysis, adsorption and ion exchange due to their regular pore structure and unique surface properties. The pore size of molecular sieve is an important characteristic parameter of molecular sieve materials. The pore size of most molecular sieve materials is smaller than It greatly limits their ability to catalyze, adsorb and separate organic macromolecules. Artificial preparation of super-large pore molecular sieves is a way to solve this problem. At present, the super-large pore molecular sieves that have been successfully prepared include VPI-5, AlPO 4 -8. Gallium phosphate molecular sieve Cloverite and several silicon-based molecular sieves, etc.

[0003] -CLO structure is an ultra-large microporous structure with a 20-membered ri...

Claims

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