Tungsten-containing mesoporous titanium dioxide nano tube catalyst and preparation thereof

Abstract

The invention belongs to the technical field of the chemical industry, in particular to a tungsten containing mesoporous titanium dioxide nanometer tube catalyst and a preparation method thereof. The catalyst takes the mesoporous titanium dioxide material with a tubular structure as a carrier and tungstenic acid as an active component; the mol ratio of the titanium dioxide to the active component is 1.9 to 55.1. The measured ammonium tungstate or yellow tungstenic acid and a latent solvent are dissolved in hot water; then the mesoporous TiO2 nanometer tube carrier is added; the WO3 / TiO2 nanometer tube catalyst is prepared by the steps of vaporizing, drying, baking and activating, etc. The mesoporous TiO2 nanometer tube improves the loading threshold value of the tungstenic acid; the prepared WO3 / TiO2 nanometer tube catalyst shows higher selectivity and yield during the reaction of catalyzing cyclopentene to selectively oxidize to prepare glutaric dialdehyde, the selectivity and yield is higher than the that of a homogeneous tungstenic acid catalyst, the defects of hard separation and recycling of homogeneous tungstenic acid are overcome and the catalyst has important industrial application values.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a catalyst for synthesizing glutaraldehyde by heterogeneous catalytic oxidation of cyclopentene and a preparation method thereof. Background technique [0002] Glutaraldehyde (Glutaraldehyde, OHC (CH 2 ) 3 CHO) is a very important chemical product. Its two aldehyde groups are very active and can undergo various reactions, especially the effect of crosslinking and solidifying proteins. Therefore, it is widely used as a disinfectant and leather tanning agent. , Fixatives for tissue sections under optical and electron microscopes, cross-linking agents for proteins and polyhydroxy compounds, and micromicelle curing agents, etc. With the development of economy and the change of environment, infectious viruses such as AIDS (HIVs), hepatitis B, sexually transmitted diseases, tuberculosis, and SARS have aroused widespread concern of people. The number of hepatiti...

AI Technical Summary

Problems solved by technology

Most of the glutaraldehyde currently used in China is imported, and only a few units such as Wuhan Organic Chemical Factory use acrolein to produce it, with a total production capacity of less than 500 tons per year.

These catalysts are all very sensitive to water, need to operate in anhydrous system, and the yield of glutaraldehyde is all not high (less than 50%)

And because it involves anhydrous hydrogen peroxide, the operation is extremely dangerous, and basically has no industrial value

The homogeneous tungstic acid catalyst reported by Anren et al. has obtained the result that the conversion rate of cyclopentene is 100% and the yield of glutaraldehyde is greater than 70% (ZL89109401.6). Difficulties

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