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Polyaniline derivative loaded salen catalyst and its preparation method and application

A derivative, polyaniline technology, applied in the field of preparation of new polymer-supported catalysts, can solve the problems of difficult separation of products and reactants, unsatisfactory cycle times, low reaction catalysis efficiency, etc., and achieves low cost and good catalysis. Effects, effects with simple synthesis methods

Inactive Publication Date: 2016-01-20
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on homogeneous chiral salen is relatively mature, but it is difficult to separate from the product and the reactant, and it is easy to generate the dimer μ-oxo-Mn(Ⅵ) bridged by oxygen, which leads to the deactivation of the catalyst and the distance from There is still a long way to go to achieve further industrialization, so it is a research hotspot in recent years to try to load chiral salen compounds on various supports to achieve heterogeneity
At present, the research on the loading of salen catalysts mainly focuses on three aspects: organic carrier loading, inorganic carrier loading, and organic-inorganic composite carrier loading. Among them, inorganic carriers and organic-inorganic composite carriers are mainly studied. The structure can well control the flexibility of the catalyst and then regulate the reaction selectivity, but the catalytic efficiency of the reaction is low, and the number of cycles is not ideal, so new breakthroughs are needed

Method used

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  • Polyaniline derivative loaded salen catalyst and its preparation method and application
  • Polyaniline derivative loaded salen catalyst and its preparation method and application
  • Polyaniline derivative loaded salen catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: The structural formula of the polyaniline derivative supported salen catalyst is shown in formula I:

[0031] I

[0032] In the catalyst, M is chromium (Cr), A is a salen catalyst, B is 3-aminopropyltriethoxysilane, and C is a hydroxyl-containing polyaniline derivative.

[0033] The preparation method of the polyaniline derivative loaded salen catalyst in this embodiment is as follows:

[0034] (1) Synthesis of hydroxyl-containing polyaniline derivatives

[0035] Use water as a solvent and configure 100ml of liquid A and liquid B in a beaker, wherein liquid A contains 6mol / L hydrochloric acid and 3.36mol / L ammonium persulfate; liquid B contains 2.4mol / L aniline, 0.168mol / L L of o-aminophenol, 6mol / L hydrochloric acid; under the action of magnetic stirring, respectively make A liquid and B liquid stir evenly, slowly add A liquid into B liquid and stir for 6 hours at a temperature of 26 ℃, and filter with 0.02 mol / L HCl solution and distilled water were w...

Embodiment 2

[0046] Example 2: The structural formula of the polyaniline derivative supported salen catalyst is shown in formula I:

[0047]

[0048] I

[0049] In the catalyst, M is one of chromium (Cr), A is a salen catalyst, B is gamma-aminopropyltrimethoxysilane, and C is a hydroxyl-containing polyaniline derivative.

[0050] The preparation method of the polyaniline derivative loaded salen catalyst in this embodiment is as follows:

[0051] (1) Synthesis of hydroxyl-containing polyaniline derivatives

[0052] Use water as a solvent and configure 100ml of liquid A and liquid B in a beaker, wherein liquid A contains 8mol / L sulfuric acid and 3.36mol / L ammonium persulfate; liquid B contains 1.2mol / L aniline, 0.336mol / L L of o-aminophenol and 8mol / L of sulfuric acid. Stir liquid A and liquid B separately under the action of magnetic stirring, slowly add liquid A to liquid B and stir for 6 hours at a temperature of 26°C, then alternately wash with 0.03mol / L HCl and distilled water u...

Embodiment 3

[0064] Example 3: The structural formula of the polyaniline derivative supported salen catalyst is shown in formula I:

[0065] Formula Ⅰ

[0066] In the catalyst, M is cobalt (Co), A is a salen catalyst, B is N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane, and C is a hydroxyl-containing polyaniline derivative.

[0067] The preparation method of the polyaniline derivative loaded salen catalyst in this embodiment is as follows:

[0068] (1) Synthesis of hydroxyl-containing polyaniline derivatives

[0069] Use water as a solvent and configure 100ml of liquid A and liquid B in a beaker, wherein liquid A contains 6mol / L nitric acid and 2.525mol / L ammonium persulfate, liquid B contains 0.8mol / L aniline, 0.503mol / L L of o-aminophenol and 6mol / L nitric acid, under the action of magnetic stirring, respectively make liquid A and liquid B stir evenly, slowly add liquid A to liquid B and stir for 7 hours at a temperature of 26°C, filter with 0.01 mol / L HCl and distilled water w...

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Abstract

The invention discloses a polyaniline derivative-supported salen catalyst and its preparation method and application. The catalyst is obtained by axially coordinating and supporting the polyaniline derivative with a salenMX catalyst system after being modified by a coupling agent. The catalyst is applied For the carbon dioxide copolymerization reaction, the reaction method is simple, the cost is low, the catalytic efficiency is high, the product selectivity is good, the glass transition temperature of the product is high and the temperature resistance is good, and the catalyst can be recycled for 3 times.

Description

technical field [0001] The invention relates to a preparation method and application of a novel polymer-loaded catalyst, belonging to the field of polymer and material synthesis. Background technique [0002] CO 2 It is an exhaust gas that pollutes the environment, but it is also a valuable carbon source. It is cheap and easy to get, and its reserves on the earth are more than the sum of coal, oil and natural gas. Development of an efficient catalyst to convert CO 2 Transformation into an economical and environmentally friendly material has always been the goal of relevant scientific and technological workers. Using CO 2 Reacting with epoxy compounds to synthesize aliphatic polycarbonate has always been considered as a CO 2 A low-pollution, environmentally friendly route to prepare polymeric compounds. This has attracted more and more attention, and it is expected to replace polystyrene as an important chemical raw material in the near future. [0003] In the past 50 y...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G64/34B01J31/22B01J32/00
CPCY02P20/50Y02P20/584
Inventor 贾庆明王进陕绍云王亚明蒋丽红苏红莹
Owner KUNMING UNIV OF SCI & TECH