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Catalyst for oxidizing-synthesizing glutaric dialdehyde with cyclopentene and preparation method thereof

A technology for synthesizing glutaraldehyde and a catalyst, applied in the chemical industry, can solve the problems of expensive copolymer template agent, high catalyst cost, air pollution and the like, and achieves the effects of good industrial application prospect, low catalyst cost and sufficient sources

Inactive Publication Date: 2009-10-28
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the above-mentioned molecular sieve catalysts, MCM-4 and HMS type mesoporous molecular sieves need to be synthesized by templates containing nitrogen, bromine or chlorine. When the molecular sieve precursor is roasted at high temperature, the templates decompose and release NO. 2 , HBr or HCl and other toxic gases, easy to cause air pollution
Although the copolymer template used in the synthesis of SBA-15 mesoporous molecular sieve does not contain nitrogen, bromine or chlorine atoms, and does not produce polluting gases during the roasting process, the copolymer template is expensive and has few sources, resulting in higher catalyst costs.

Method used

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  • Catalyst for oxidizing-synthesizing glutaric dialdehyde with cyclopentene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] According to the molar ratio of tetraethyl silicate: tetrabutyl titanate: octadecyl polyoxyethylene ether: ethanol: isopropanol: water = 1: 0.01: 0.025: 9: 150, the first template octadecane Base polyoxyethylene ether is dissolved in water-ethanol mixed solution, tetrabutyl titanate is dissolved in isopropanol, and then tetraethyl silicate and tetrabutyl titanate in isopropanol are mixed and slowly added dropwise to Template agent-water-ethanol mixture (in a state of strong stirring), heated to 50°C and stirred for 24 hours, filtered, washed with water and ethanol three times successively, dried the obtained filter cake in an oven at 110°C for 5 hours, and then Calcined at 550° C. for 4 hours in a muffle furnace, then ground and sieved to obtain a Ti-MSU mesoporous molecular sieve with a particle size of 80-100 mesh. The BET specific surface area measured by low temperature nitrogen adsorption-desorption method is 980m 2 / g, the average pore diameter is 3.8nm, and the ...

Embodiment 2

[0026] According to Example 1, the templating agent was changed to hexadecyl polyoxyethylene ether, and the molar ratio of raw materials was changed to tetraethyl silicate: tetrabutyl titanate: hexadecyl polyoxyethylene ether: ethanol: isopropyl Alcohol: water = 1: 0.015: 0.025: 9: 150, and the remaining steps are the same as in Example 1. The obtained Ti-MSU mesoporous molecular sieve molecular sieve specific surface area is 1030m 2 / g, the average pore diameter is 4.2nm, and the silicon / titanium molar ratio is 1:0.015, which is recorded as carrier 2#.

Embodiment 3

[0028] According to Example 2, the molar ratio of raw materials was changed to tetraethyl silicate: tetrabutyl titanate: hexadecyl polyoxyethylene ether: ethanol: isopropanol: water = 1: 0.025: 0.025: 9: 150 , the rest of the steps are the same as in Example 2. The obtained Ti-MSU mesoporous molecular sieve molecular sieve has a specific surface area of ​​940m 2 / g, the average pore diameter is 4.0nm, and the silicon / titanium molar ratio is 1:0.024, which is recorded as carrier 3#.

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Abstract

The invention discloses a catalyst for oxidizing-synthesizing glutaric dialdehyde with cyclopentene and a preparation method thereof. The catalyst adopts a Ti-MSU type mesoporous molecular sieve as a carrier and is a supported catalyst supporting tungstic oxide on surface; the carrier Ti-MSU type mesoporous molecular sieve has a three-dimensional vertical-crossing arrangement vermiform pore canal structure, bigger aperture and higher specific surface; and the mol ratio of silicon to titanium is 1:0.01 to 1:0.04; and the content of tungstic oxide adopted as the active component accounts for 1 to 15 percent of the mass of the catalyst. The catalyst has the characteristics of high activation, better selectivity, mild reaction condition for catalyst preparation and glutaric dialdehyde synthesis with the catalyst, low cost, long service life, better industrial application prospect and environment-friendly property in the whole process from catalyst preparation to glutaric dialdehyde synthesis.

Description

technical field [0001] The patent of the present invention belongs to the technical field of chemical industry, and specifically relates to a catalyst for oxidizing cyclopentene to synthesize glutaraldehyde and a preparation method thereof. Background technique [0002] Glutaraldehyde is the most important saturated aliphatic dialdehyde next to glyoxal, and it is an excellent tanning agent, tissue curing agent, protein crosslinking agent and high-efficiency bactericidal disinfectant. Widely used in biomedical engineering, cellular immunology, biochemistry, leather chemistry, histochemistry, food, microbiology industry, environmental protection and other fields, it is a fine chemical with important uses. At present, the annual demand for glutaraldehyde in the domestic market is about 20,000 tons. Only a few enterprises in Wuhan and Shandong have small-scale production, and the total production capacity is less than 1,000 tons. Domestic glutaraldehyde is mainly imported. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J37/08C07C47/12C07C45/28
Inventor 郭建维刘卅邓志城崔亦华彭进平
Owner GUANGDONG UNIV OF TECH
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