Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Porous material and method for producing the same

A manufacturing method and technology of porous metals, applied in the direction of fluoride preparation, organic chemical methods, chemical instruments and methods, etc., can solve problems such as unstable use and pore structure damage

Inactive Publication Date: 2006-07-05
权恒道
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since these silicates or metal oxides are corroded by the reaction in the environment of corrosive gases such as hydrogen fluoride, the fine pore structure is destroyed, so they have the disadvantage that they cannot be used stably.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Sodium silicate (Na 2 SiO 3 , 3g) was dissolved in 28% ammonia water (114ml), and was added into chromium trichloride aqueous solution (about 10% chromium content, 240g) while vigorously stirring. The pH after mixing is about 7. The precipitate was filtered and taken out, washed with deionized water, dried, and fired in a nitrogen atmosphere at 450° C. to obtain a chromium salt of a silicon-containing precursor. The specific surface area measured by BET method is 366m 2 / g.

Embodiment 2

[0060] The precursor prepared in Example 1 was treated with nitrogen-diluted hydrogen fluoride (hydrogen fluoride / nitrogen=1 / 3) at room temperature for 4 hours, then the temperature was raised, and finally, only hydrogen fluoride was used at 350°C to obtain a porous Chromium fluoride. The specific surface area measured by BET method is 176m 2 / g.

Embodiment 3

[0062] The porous chromium fluoride prepared in Example 2 was used as a catalyst for gas-phase fluorination of dichloromethane. Gasify dichloromethane (0.3g / min) and anhydrous hydrogen fluoride (300ml / min), react in the presence of a catalyst, wash the product with water, dry it with soda lime, and analyze it with gas chromatography. Difluoromethane (CH 2 f 2 ) and chlorofluoromethane (CH 2 The yield of CIF) is shown in Table 1.

[0063]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The present invention provides a raw material composition suitably used for synthesizing a porous metal fluoride having a large surface area and being stable even in a corrosive gas environment or the like. The porous metal fluoride obtained by reacting this raw material composition with anhydrous hydrogen fluoride has a larger surface area and is stable in a corrosive gas environment, etc., and can be used, for example, as a fluorination catalyst.

Description

technical field [0001] The present invention relates to a raw material composition for synthesizing a porous metal fluoride, a porous metal fluoride obtained by fluorinating the raw material, a fluorine catalyst containing the porous metal fluoride, and a method for producing a fluorine compound using the catalyst. Background technique [0002] Porous substances having micro- and medium-sized pores are widely used in catalysts, selective separations, selective reactions, sensors, and the like (Non-Patent Document 1). However, almost all such porous substances are silicates or metal oxides (Non-Patent Documents 2 and 3). Since these silicates and metal oxides are corroded by reaction in an environment of a corrosive gas such as hydrogen fluoride, the fine pore structure is destroyed, and thus they cannot be stably used. [0003] Metal fluorides have been used as stable porous substances, such as porous aluminum fluoride (non-patent literature 4, 5), porous magnesium fluoride...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01G37/04C01G51/08C01G53/08C01G9/04C01G15/00C01G23/02C01B9/08C07C19/08C07C17/20C07B61/00B01J27/132B01J23/26B01J23/86B01J35/10B01J37/03B01J37/26C01F5/28C01F7/50C01F11/22C07C19/10
CPCC07C19/08B01J23/26B01J23/864B01J27/132B01J35/1014B01J35/1019B01J37/031B01J37/26C01B9/08B01J35/613B01J35/615
Inventor 权恒道杨会娥田村正则关屋章
Owner 权恒道
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com