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Porous chitosan metal porphyrin composite and preparation method and application thereof

A metalloporphyrin and chitosan technology, which is applied in the field of chemical engineering, can solve the problems of low reusability per unit mass of metalloporphyrin, low single-pass conversion rate, low selectivity, etc., and achieves improved one-pass conversion rate and less dosage. , a wide range of effects

Inactive Publication Date: 2013-02-20
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is: in order to overcome the shortcomings of low single-pass conversion rate, low selectivity, large pollution, and low reuse rate of metalloporphyrin per unit mass in the current toluene oxidation process, a kind of porous chitosan four (to Preparation method and application of sodium sulfonate) phenyl metal porphyrin complex

Method used

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  • Porous chitosan metal porphyrin composite and preparation method and application thereof
  • Porous chitosan metal porphyrin composite and preparation method and application thereof
  • Porous chitosan metal porphyrin composite and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0033] Preparation of porous chitosan four (sodium p-sulfonate) phenyl cobalt porphyrin complex:

[0034]Weigh 40 g of chitosan and dissolve it in 200 ml of 2% acetic acid solution, and mechanically stir until it becomes a yellow colloidal liquid. Add 213ml of ammonia water with a concentration of 11% dropwise under stirring to adjust the solution to pH=6.5 to form white flocs. Slowly add 100ml of tetrakis(sodium p-sulfonate)phenylcobalt porphyrin aqueous solution with a concentration of 0.4g / L through the dropping funnel, after stirring for 24 h, suction filter to obtain a paste-like colloid, add 100g NH 4 HCO 3 , stirred until uniform, dried under an infrared lamp, and vacuum-dried to prepare a porous chitosan tetrakis(sodium p-sulfonate) phenyl cobalt porphyrin complex.

Embodiment 2

[0036] Preparation of porous chitosan / tetrakis(sodium p-sulfonate)phenyl manganese porphyrin complex:

[0037] Weigh 40 g of chitosan and dissolve it in 200 ml of 2% acetic acid solution, and mechanically stir until it becomes a yellow colloidal liquid. Under high-speed stirring, 213ml of 11% ammonia water was added dropwise to pH=7. Slowly add 100ml of 0.4g / L aqueous solution of tetrakis(sodium p-sulfonate)phenylmanganese porphyrin through the dropping funnel, stir vigorously for 24 h, filter with suction, dry under infrared light, add 100g of NH 4 HCO 3 , Vacuum drying prepared porous chitosan four (sodium p-sulfonate) phenyl manganese porphyrin complex.

Embodiment 3

[0039] Preparation of porous chitosan four (sodium p-sulfonate) phenyl manganese porphyrin complex:

[0040] First add 8.78 kg of glacial acetic acid and 439 kg of deionized water in the reaction vessel to make an aqueous acetic acid solution, add 17.6 kg of powdered chitosan, start the stirrer, and stir for several hours at a high speed greater than 2500 rpm, until it is completely After dissolving, the material is discharged to obtain a yellow colloidal liquid, and then 103.03 parts of deionized water are added to the reactor; under stirring, ammonia water is added drop by drop until the pH of the solution is 6.5, and white flocs are precipitated from the solution; 100ml 0.4g / L tetrakis (sodium p-sulfonate) phenyl manganese porphyrin aqueous solution, under stirring chitosan and tetrakis (sodium p-sulfonate) phenyl manganese porphyrin carry out acid-base reaction and coordination at room temperature Reaction, reaction time 24 h, the obtained chitosan tetrakis (sodium p-sulfo...

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Abstract

The invention discloses a porous chitosan metal porphyrin composite and a preparation method and application thereof. The porous chitosan metal porphyrin composite mainly comprises, 17.6 parts of, chitosan, 8.78 parts of glacial acetic acid, 0.0878 part of ammonia water, 0.0176 part of metal porphyrin, 43.9 parts of ammonium bicarbonate and 542.06 parts of deionized water. The preparation method includes adding ammonia water into chitosan sol liquid to regulate the pH value to be 6.5-7, adding 4- (bi-sodium sulfonate) phenyl metal porphyrin aqueous solution, stirring for 24 hours, filtering to obtain paste, adding NH4HCO3 to stir uniformly, and finally heating and drying to obtain the porous chitosan metal porphyrin composite. The composite is used for catalyzing methylbenzene, so that the conversion rate of per pass of methylbenzene and yield of main products are increased obviously, the conversion rate of cobalt porphyrin catalyzed methylbenzene is up to 12.44%, the catalyst conversion quantity is 2.53X105, and the yield of aldehyde alcohol is up to 5.93%.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and relates to a porous chitosan metalloporphyrin compound and its preparation method and application, in particular to a porous chitosan tetrakis(sodium p-sulfonate)phenyl metalloporphyrin Composite, the preparation method of porous chitosan double-type linkage (salt bond and coordination bond) tetrakis (sodium p-sulfonate) phenyl metalloporphyrin and its use in selective catalytic oxygen oxidation of toluene to produce benzyl alcohol and benzene application of formaldehyde. Background technique [0002] Benzaldehyde and benzyl alcohol are important fine chemical products. It is of great practical significance to study the catalytic oxidation of toluene to produce benzyl alcohol and benzaldehyde in an environmentally friendly way. In the past ten years, scholars at home and abroad have researched and invented many toluene oxidation processes, including: ① Chlorination hydrolysis me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08B01J31/22C07C27/12C07C33/22C07C29/50C07C47/54C07C45/36
CPCY02P20/50
Inventor 黄冠胡耀东彭艳郭勇安危素娟
Owner GUANGXI UNIV
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