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Method for synthesizing OMS-2 manganese oxide octahedral molecular sieve

An octahedral molecular sieve, OMS-2 technology, applied in molecular sieve compounds, chemical instruments and methods, manganese oxide/manganese hydroxide, etc.

Inactive Publication Date: 2012-05-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main difference between this method and traditional synthetic methods such as hydrothermal method is the use of ionic liquids as the reaction medium.

Method used

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  • Method for synthesizing OMS-2 manganese oxide octahedral molecular sieve
  • Method for synthesizing OMS-2 manganese oxide octahedral molecular sieve
  • Method for synthesizing OMS-2 manganese oxide octahedral molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put 30.00g of 1-methyl-3-butylimidazole bromide in a 250mL two-necked flask, and add 0.79g of KMnO 4 . Continue stirring until the reactants are well mixed.

[0031] The reaction mixture was transferred to an oven at 150° C., and allowed to stand at a constant temperature for crystallization for 10 h.

[0032] The reaction mixture was poured into ethanol, sonicated and filtered. The filter cake was washed with ethanol. The product was dried overnight in an oven at 110°C. The obtained product is OMS-2 manganese oxide octahedral molecular sieve.

Embodiment 2

[0034] Put 65.00g of 1-methyl-3-ethylimidazolium bromide ionic liquid in a 250mL two-necked bottle, and add 0.79g of KMnO 4 . Continue stirring until the reactants are well mixed.

[0035] The two-neck bottle containing the reaction mixture was transferred to a MARS5 microwave reactor, and the reaction temperature was measured using a RPT-300plus temperature sensor. Set the reaction temperature to 120°C and the heating time to 20min. Stand at constant temperature for 30min to crystallize.

[0036] The reaction mixture was poured into ethanol, sonicated and filtered. The filter cake was washed with ethanol. The product was dried overnight in an oven at 110°C. The obtained product is OMS-2 manganese oxide octahedral molecular sieve.

Embodiment 3

[0038] Put 20.00g of 1,2-dimethyl bromide, 3-ethylimidazolium ionic liquid in a 250mL two-necked flask, and add 0.34g of KNO to it under vigorous stirring at 70°C 3 , 2.37g KMnO 4 . Continue stirring until the reactants are well mixed.

[0039] The reaction mixture was transferred to an oven at 150° C., and left at constant temperature for crystallization for 24 h.

[0040] The reaction mixture was poured into ethanol, sonicated and filtered. The filter cake was washed with ethanol. The product was dried overnight in an oven at 110°C. The obtained product is OMS-2 manganese oxide octahedral molecular sieve.

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Abstract

The invention relates to a method for synthesizing an OMS-2 manganese oxide octahedral molecular sieve. By special solvent properties and reductibility of an ionic liquid, the OMS-2 manganese oxide octahedral molecular sieve with specific appearance and physicochemical performance can be synthesized. During the synthesis process, the ionic liquid is used as a reaction medium and a reducing agent to be uniformly mixed with permanganate and sylvite; crystallization is carried out at a certain temperature for a certain time; and washing and drying are then carried out to obtain the OMS-2 manganese oxide octahedral molecular sieve. The manganese oxide octahedral molecular sieve can be used as a catalyst for a plurality of selective oxidation reactions.

Description

technical field [0001] The invention discloses a method for synthesizing an OMS-2 type manganese oxide octahedral molecular sieve, that is, a method for synthesizing an OMS-2 type manganese oxide octahedral molecular sieve by using an ionic liquid as a reaction medium and a reducing agent. Background technique [0002] As an important industrial raw material, manganese oxide is widely used in the preparation of battery cathode materials, magnetic materials and oxidation reaction catalysts. Manganese oxide for industrial use is obtained by mining pyrolusite and deep-sea manganese nodules. However, the purity of manganese oxide ore is not high, the crystal phase is complex, and the crystallinity is poor, so chemists have been working on the synthesis of manganese oxide with specific crystal phase and morphology. Since 1993, researchers such as Suib S.L. have successively reported a series of manganese oxide octahedral molecular sieves with a regular one-dimensional pore struc...

Claims

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Application Information

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IPC IPC(8): C01G45/02C01B39/00C01B37/00
CPCY02P20/54
Inventor 田志坚刘浩王磊王炳春马怀军宋婕李大伟
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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