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Method for preparing active porous carrier supported transition metal salt catalyst

A technology of transition metal salts and transition metals, which is applied in the field of preparation of transition metal salt catalysts, can solve the problems of catalyst difficulty, catalyst activity selectivity decline, separation, etc., and achieve high activity and selectivity effects

Inactive Publication Date: 2008-05-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, catalysts with transition metals as active centers are used in reaction processes such as oxidation reactions (US4970347, US4046813, CN1425642), ring-opening polymerization reactions, graft polymerization reactions (CN1470534, CN1405192, CN1405192, CN1422876, CN1263520, CN1470535, CN1572809) It is very extensive, but in most cases, the use of transition metal catalysts also has its inherent disadvantages. Taking oxidation reactions as an example (US4970347, US4046813), because transition metal catalysts can be well dissolved in the reaction system, they can be used at the end of the reaction. After the catalyst is difficult to separate from the reaction system, which brings difficulties to the post-reaction treatment process and catalyst recovery
At present, the commonly used inorganic carriers such as molecular sieves, diatomaceous earth, titanium dioxide, activated carbon, etc. to immobilize the metal active center solve the problem of catalyst recovery, but in most cases, the activity and selectivity of the catalyst are not enough Therefore, how to solve the problem of catalyst recovery while maintaining catalyst activity is the direction of current catalyst research.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 5 g of zeolite in a 250 ml three-necked flask and disperse in 100 ml of aqueous solution, add an aqueous solution containing 4.5 g (0.1 mol) of ethylamine at 50° C., adjust the pH to 13 and stir for 4 hours. Then, 0.54 g (2 mmol) of ferric chloride hexahydrate aqueous solution (10 ml) was slowly added dropwise within 1 hour, and stirring was continued for 12 hours after the drop was completed. Then the stirring was stopped, the solid was filtered out, washed three times with methanol and deionized water respectively, and dried in vacuum at 100° C. to finally obtain 5.3 g of solid (yield: 87.7%).

Embodiment 2

[0018] In a 250ml three-necked flask, add 5g molecular sieves and disperse in 100ml ethanol solution, add 4.0g (0.05mol) pyridine at 70°C, adjust the pH value to 11 and stir for 4 hours. Then slowly add dropwise an ethanol solution (10 ml) containing 0.55 g (3 mmol) of copper acetate within 1 hour, and continue stirring for 12 hours after the drop is complete. Then the stirring was stopped, the solid was filtered out, washed three times with ethanol and deionized water respectively, and dried under vacuum at 100° C. to finally obtain 6.1 g of solid (yield: 63.9%).

Embodiment 3

[0020] In a 250ml three-necked flask, 5g of activated carbon was added and dispersed in 100ml of toluene, and an aqueous solution containing 4.65g (0.05mol) of aniline was added at 80°C to adjust the pH to 12 and stirred for 4 hours. Then, a methanol solution (10 ml) containing 0.9 g (5 mmol) of manganese nitrate was slowly added dropwise within 1 hour, and stirring was continued for 12 hours after the drop was completed. Then the stirring was stopped, the solid was filtered out, washed three times with methanol and deionized water respectively, and dried in vacuum at 100° C. to finally obtain 8.2 g of solid (yield: 77.7%).

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PUM

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Abstract

The invention relates to a preparation method of a transition metal salt catalyst supported by an active porous inorganic carrier. On the modified active porous inorganic carrier, the reaction generates a transition metal complex catalyst supported by the active porous carrier.

Description

technical field [0001] The invention relates to a preparation method of a transition metal salt catalyst supported by an active porous carrier. The method is to modify the inorganic support with nitrogen-containing compounds in water or other conventional organic solvents, then support the transition metal salt on the modified active porous inorganic support, and react to form a transition metal supported by the active porous support. metal salt catalyst. Background technique [0002] As we all know, catalysts with transition metals as active centers are used in reaction processes such as oxidation reactions (US4970347, US4046813, CN1425642), ring-opening polymerization reactions, graft polymerization reactions (CN1470534, CN1405192, CN1405192, CN1422876, CN1263520, CN1470535, CN1572809) It is very extensive, but in most cases, the use of transition metal catalysts also has its inherent disadvantages. Taking oxidation reactions as an example (US4970347, US4046813), because ...

Claims

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Application Information

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IPC IPC(8): B01J29/064B01J29/076B01J31/04B01J27/10B01J27/053
Inventor 李浩然毛建拥胡兴邦王从敏孙勇
Owner ZHEJIANG UNIV