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Supported polyoxometallate material for preparing aniline through nitrobenzene hydrogenation

A polyoxometalate and supported technology, which is applied in the preparation of amino compounds, organic compounds, organic compound/hydride/coordination complex catalysts, etc., can solve the problem of high energy consumption of catalysts, and achieve simple preparation methods , high conversion rate and mild catalytic reaction conditions

Pending Publication Date: 2021-12-07
JILIN INST OF CHEM TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Although the above catalysts show excellent catalytic activity in the catalytic system, the preparation process of the catalyst and the energy consumption of the catalytic reaction process are relatively high.

Method used

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  • Supported polyoxometallate material for preparing aniline through nitrobenzene hydrogenation
  • Supported polyoxometallate material for preparing aniline through nitrobenzene hydrogenation
  • Supported polyoxometallate material for preparing aniline through nitrobenzene hydrogenation

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Embodiment Construction

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] Preparation of a supported polyoxometalate material for the hydrogenation of nitrobenzene to aniline:

[0032](1) Preparation of nitrogen-rich covalent organic porous material mPMF: Add melamine (5.4mmol), paraformaldehyde (3mmol) and 5mL dry dimethyl sulfoxide into the reactor, heat at 120°C for 1h, take it out, Cooled to room temperature, stirred by magnetic force for 30 minutes, put it into the oven again, and reacted at 160°C for 48 hours. The obtained solid was washed and filtered with d...

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Abstract

The invention discloses a supported polyoxometallate material for preparing aniline through nitrobenzene hydrogenation. A prepared nitrobenzene hydrogenation reaction catalyst is a novel efficient recyclable heterogeneous catalyst which takes a nitrogen-rich covalent organic porous material as a carrier and is loaded with polyoxometallate. According to the catalyst prepared by the invention, hydrazine hydrate is taken as a reducing agent under a mild condition, and nitrobenzene is highly selectively reduced to generate aniline. The supported polyoxometallate material has the advantages of simple preparation method, small loading capacity, short reaction time, high catalyst utilization rate, high selectivity, low loss and the like, and has application value in the industrial production process.

Description

technical field [0001] The invention belongs to the technical field of fine chemical industry and catalysis, and more specifically relates to a preparation method of nitrogen-rich covalent organic porous material loaded polyoxometalate composite material and its application in nitrobenzene hydrogenation reaction. Background technique [0002] As an important chemical intermediate in the chemical industry, aniline can be used to produce more than 300 products such as dyes, pharmaceuticals, pesticides, rubber additives, surfactants and chemical intermediates. Recently, with the wide application of polyurethane materials in the production of electronic products, medical machinery, automobile manufacturing, construction and civil engineering, industrial materials and other fields, the market demand for aniline will also grow rapidly. [0003] The production process of aniline includes nitrobenzene iron powder reduction method, phenol ammoniation method and nitrobenzene catalytic...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J27/19C07C209/32C07C211/46
CPCB01J31/063B01J27/19C07C209/325C07C211/46Y02P20/584
Inventor 娄大伟高文秀吕杰琼张浩王希越连丽丽
Owner JILIN INST OF CHEM TECH
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