Preparation method and application for chitosan-grafted quadri(p-carboxylphenyl) metalloporphyrin

A carboxyphenyl, metalloporphyrin technology, applied in the field of catalyst preparation, can solve the problems of long reaction time, large pollution, low metalloporphyrin reuse rate and the like, and achieves simple preparation, low cost, and improved reuse efficiency. Effect
CN103554302AInactive Publication Date: 2014-02-05GUANGXI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GUANGXI UNIV
Publication Date
2014-02-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method and an application for chitosan-grafted quadri(p-carboxylphenyl) metalloporphyrin. The preparation method comprises the following steps: adding metalloporphyrin in a three-neck flask filled with dichloromethane and N,N-dimethylformamide, charging dry nitrogen, adding thionyl chloride, and heating and stirring; adding chitosan powder and dichloromethane, reacting under heating reflux; performing suction filtration, washing by dichloromethane, then washing off the unamidated metalloporphyrin in a filter cake in a Soxhlet extractor; and performing vacuum drying on the filter cake to obtain the chitosan-grafted quadri(p-carboxylphenyl) metalloporphyrin. The catalytic material, namely the chitosan-grafted quadri(p-carboxylphenyl) metalloporphyrin is simple in preparation method and used for catalyzing ethylbenzene oxidation, easy to separate from a catalytic oxidation product, and capable of being recovered and repeatedly used for catalyzing for at least four times, as well as has an average conversion rate of 13.79-18.42% for ethylbenzene and an average productivity of 10.87-15.51% of ketone alcohol (the sum of acetophenone and 1-phenethyl alcohol).
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Description

technical field

[0001] The invention relates to a preparation method and application of a catalyst, in particular to a preparation method and application of chitosan grafted tetrakis(p-carboxyphenyl) metalloporphyrin. Background technique

[0002] Acetophenone and DL-1-phenylethanol are important chemical raw materials, and have broad application prospects in medicine, pesticides, spices, etc. The traditional method of producing acetophenone is to use benzene as a raw material, and use acetyl chloride or acetic anhydride in a homogeneous Lewis acid (AlCl 3 ,BF 3 ,FeCl 3 ,ZnCl 2 ,SnCl 4 ,TiCl 4 ) or strong protic acid (H 2 SO 4 , HF) catalytic system, which is produced by Friedel-Crafts acylation reaction, which also produces a large amount of toxic and corrosive wastewater. In the past ten years, mesoporous molecular sieves containing cobalt or manganese have been used to catalyze air oxidation of ethylbenzene in acetic acid medium to obtain 25-30% yield of acetophen...

Claims

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