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Organic and inorganic carbon hybridized silicon zeolite solid acid cellular material and its prepn

A technology of microporous material and inorganic carbon, which is applied in the field of novel all-silicon organic-inorganic hybrid zeolite solid acid and its preparation, can solve unreported problems, and achieve the effects of easy product, low production cost and good industrial application prospect.

Inactive Publication Date: 2005-07-13
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no special properties have been reported in terms of acid properties

Method used

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  • Organic and inorganic carbon hybridized silicon zeolite solid acid cellular material and its prepn
  • Organic and inorganic carbon hybridized silicon zeolite solid acid cellular material and its prepn
  • Organic and inorganic carbon hybridized silicon zeolite solid acid cellular material and its prepn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The base all-silicon MFI-type zeolite reacts with formaldehyde according to the following steps to prepare the all-silicon MFI-type organic-inorganic carbon hybrid zeolite solid acid:

[0021] 1. The solid of polyoxymethylene is heated to depolymerize at 90℃~150℃, and collected with liquid nitrogen.

[0022] 2. Introduce the vapor of the formaldehyde monomer into the container containing the all-silicon MFI zeolite, and react at room temperature for 2 hours to obtain the reaction product. The reaction product is filtered, washed and dried to obtain the all-silicon MFI type organic-inorganic carbon hybrid zeolite solid acid.

Embodiment 2

[0024] The base MFI type zeolite reacts with formaldehyde according to the following steps to prepare an all-silicon MFI type organic-inorganic carbon hybrid zeolite solid acid:

[0025] 1. Place the solid of polyoxymethylene on the bottom layer of the reactor, and place the base material on the upper layer, separated by a screen.

[0026] 2. The reaction kettle was placed in an oven at 200°C and reacted under self-generating pressure for 2 days. The reaction product was filtered, washed and dried to obtain an all-silicon MFI type organic-inorganic carbon hybrid zeolite solid acid.

Embodiment 3

[0028] The base MFI zeolite reacts with acetaldehyde according to the following steps to prepare all-silicon MFI zeolite solid acid:

[0029] 1. Mix the acetaldehyde solution with the all-silicon MFI zeolite and place it in the reactor. Or place the acetaldehyde solution on the bottom layer of the reactor, and place the base material on the top layer, separated by a screen.

[0030] 2. The reaction kettle was placed in an oven at 200°C and reacted under self-generating pressure for 2 days. The reaction product was filtered, washed and dried to obtain an all-silicon MFI type organic-inorganic carbon hybrid zeolite solid acid.

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Abstract

The present invention belongs to the field of microporous material technology, and is especially one novel kind of organic and inorganic carbon hybridized silicon zeolite solid acid and its preparation process. The material is obtained through mixing silicon zeolite molecular sieve with aldehyde solution or solid, and hydrothermal reaction or gas / solid phase reaction to substitute skeleton oxygen with aldehydo radical. By means of altering the C1-C3 alkyl radical carbon chain length in aldehyde and altering the structure of base zeolite, the solid acidity and pore property of the novel catalyst material may be regulated to meet the practical requirement. The synthesis process has mild condition, high repeatability, simple preparation, low cost and environment friendship, and is s industrial production.

Description

technical field [0001] The invention belongs to the technical field of microporous materials, and in particular relates to a novel all-silicon organic-inorganic hybrid zeolite solid acid and a preparation method thereof. The material has broad application prospects in catalysis, adsorption and alkaline separation. Background technique [0002] Traditional solid acids include many kinds, such as naturally occurring clay minerals and zeolites, metal oxides such as silica and alumina, and inorganic substances such as sulfides, sulfates, and nitrates. They all have different acid sites and different selectivities as acid catalysts. The acid center of alumina is the incompletely coordinated aluminum atom formed by dehydration, and there are two acid maxima around 773K and 993K; the acid center of zeolite is mainly the Brnsted acid site and Lewis acid site of the framework. Differences in cations and differences in the ratio of silica to aluminum lead to different acid strength...

Claims

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Application Information

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IPC IPC(8): B01J21/12C01B39/02
Inventor 郭娟韩爱杰余辉龙英才
Owner FUDAN UNIV
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