Macromolecular supported catalyst, and preparation method and application thereof

A polymer-supported and catalyst technology is applied in the field of preparation of polymer-supported catalysts and achieves the effects of convenient operation, simple preparation steps and low cost

Active Publication Date: 2013-10-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the aspect of SalenMX complexes catalyzing the copolymerization of carbon dioxide and epoxy compounds, new breakthroughs are needed to improve the efficiency and recycling of catalysts.

Method used

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  • Macromolecular supported catalyst, and preparation method and application thereof
  • Macromolecular supported catalyst, and preparation method and application thereof
  • Macromolecular supported catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: The structural formula of the polymer supported catalyst is shown in formula I:

[0029]

[0030] I

[0031] Among them: M is chromium (Cr); X is Cl; For the intrinsic state of polyaniline.

[0032] The preparation method of the polymer-supported catalyst in this embodiment is as follows:

[0033] 1. Preparation of Ligands

[0034] Add (R,R)-1,2-cyclohexanediamine-mono-(+) tartrate and potassium carbonate (molar ratio 1:2) into the reactor, then add ethanol until the two substances are completely dissolved, then drop Add the ethanol solution of 3,5-di-tert-butyl salicylaldehyde, the molar ratio of which is 3,5-di-tert-butyl salicylaldehyde:potassium carbonate=1:1, stir, and stop the reaction after refluxing at 75°C for 2 hours , suction filtration, and washing with ethanol until the filtrate was clarified to obtain ligand II with the following structural formula, with a yield of 75%;

[0035]

[0036] II

[0037] 2. SalenCr Ⅲ Preparation of C...

Embodiment 2

[0044] Embodiment 2: The structural formula of the polymer supported catalyst is shown in formula I:

[0045]

[0046] I

[0047] Among them: M is chromium (Cr); X is Cl; For the intrinsic state of polyaniline.

[0048] The preparation method of the polymer-supported catalyst in this embodiment is as follows:

[0049] 1. Preparation of Ligands

[0050] Add (R,R)-1,2-cyclohexanediamine-mono-(+) tartrate and potassium carbonate (molar ratio 1:3) into the reactor, then add ethanol until the two substances are completely dissolved, then drop Add the ethanol solution of 3,5-di-tert-butyl salicylaldehyde, the molar ratio of which is 3,5-di-tert-butyl salicylaldehyde:potassium carbonate=1:2, stir, and stop the reaction after reflux at 80°C for 2.5 hours , suction filtration, and washing with ethanol until the filtrate was clarified to obtain ligand II with the following structural formula, with a yield of 77%;

[0051]

[0052] II

[0053] 2. SalenCr Ⅲ Preparation of Cl...

Embodiment 3

[0060] Embodiment 3: The structural formula of the polymer supported catalyst is as shown in formula I:

[0061]

[0062] I

[0063] Among them: M is cobalt (Co); X is nitrate; For the intrinsic state of polyaniline.

[0064] The preparation method of the polymer-supported catalyst in this embodiment is as follows:

[0065] 1. Preparation of Ligands

[0066] Add (R,R)-1,2-cyclohexanediamine-mono-(+) tartrate and potassium carbonate (molar ratio 1:3) into the reactor, then add ethanol until the two substances are completely dissolved, then drop Add the ethanol solution of 3,5-di-tert-butyl salicylaldehyde (20ml ethanol), the molar ratio of which is 3,5-di-tert-butyl salicylaldehyde:potassium carbonate=1:1.5, stir, and reflux at 80°C for 2.3 Stop the reaction after 1 hour, filter with suction, wash with absolute ethanol until the filtrate is clarified, then the ligand (II) with the following structural formula can be obtained, and the yield is 75%;

[0067]

[0068]...

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Abstract

The invention discloses a macromolecular supported catalyst, and a preparation method and application thereof. The catalyst is prepared from macromolecular polyaniline and a SalenMx catalyst, wherein the molecular chain of the macromolecular polyaniline contains an imine group. The catalyst prepared by the method can be used for catalyzing copolymerization of carbon dioxide and cyclohexene oxide, has high catalytic efficiency, and still has activity after being reused for three times. The preparation method is simple in step, low in cost and convenient to operate.

Description

technical field [0001] The invention relates to a polymer-supported catalyst, a preparation method and application thereof, and belongs to the fields of preparation of a polymer-supported catalyst and polycarbonate synthesis. Background technique [0002] carbon dioxide (CO 2 ) As one of the main greenhouse gases, it is also a kind of abundant, cheap and non-toxic carbon resources, and it has a good prospect to replace petroleum resources as raw materials. Among them, the copolymerization of carbon dioxide and epoxy compounds to generate high molecular weight polycarbonate is one of the effective ways to realize the utilization of carbon dioxide. In this process the reactant CO 2 The oxidation state of the middle carbon has not changed, no additional hydrogen source is needed, the raw material is cheap and the source is wide; the product polycarbonate has the advantages of biodegradability, transparency and low oxygen transmission rate, and can be widely used in food packa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/34C08G73/02
Inventor 贾庆明母佳利范文俊陕绍云
Owner KUNMING UNIV OF SCI & TECH
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