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Method for preparing palladium-carrying catalyst with nano Pd by suspension polymerization

A technology of suspension polymerization and palladium catalyst, applied in the field of ion exchange resin preparation technology, can solve the problems of large palladium loss, many organic solvents, and long process flow, and achieve the effect of low environmental protection pressure, less organic solvent, and simple process

Inactive Publication Date: 2009-08-05
KAIRUI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above inventions all need to carry out loading processes such as ion exchange or impregnation, which have the disadvantages of long process flow, many organic solvents, and large palladium loss, and there is only physical adsorption between the reduced palladium element and the carrier, and palladium is easy to lose. In the present invention, the nano-palladium is evenly distributed on the skeleton of the resin microsphere through intermolecular force during the polymerization, and the palladium is not easy to be lost. This technology is innovative, and no relevant public reports have been seen.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1. Surface polymerization of nanomaterials

[0051] Disperse 2.5 grams of nano-palladium into 500 grams of water, add 2 grams of butyl acrylate, 0.2 grams of benzoyl peroxide, and 0.5 grams of PVA in proportion, raise the temperature, and react at a reaction temperature of 70 ° C for 8 hours to obtain surface-polymerized nano-palladium. Inorganic materials, centrifuged for later use.

[0052] 2. Suspension polymerization

[0053] 2.1. Preparation of water phase

[0054] Add pure water, polyvinyl alcohol, and magnesium carbonate into a 2000ml three-neck flask according to the following proportions, and stir evenly;

[0055] Component Parts by weight

[0056] Pure water 1000

[0057] Polyvinyl alcohol 2

[0058] Magnesium Carbonate 5

[0059] 2.2. Preparation of oil phase

[0060] Mix styrene and divinylbenzene in a beaker according to the amount calculated according to the degree of crosslinking, and then add peroxide

[0061] Benzoyl, white oil and surface-polym...

Embodiment 2

[0077] 1. Surface polymerization of nanomaterials

[0078] Disperse 7.5 grams of nano-palladium into 500 grams of water, add 2 grams of butyl acrylate, 0.2 grams of benzoyl peroxide, and 0.5 grams of PVA in proportion, raise the temperature, and react at a reaction temperature of 70 ° C for 8 hours to obtain surface-polymerized nano-palladium. Inorganic materials, centrifuged for later use

[0079] Other processes are exactly the same as in Example 1:

[0080] A palladium-loaded resin catalyst containing 0.42% of palladium was obtained, product number A2.

Embodiment 3

[0082] 1. Surface polymerization of nanomaterials

[0083] Disperse 5 grams of nano-palladium into 500 grams of water, add 2 grams of butyl acrylate, 0.2 grams of benzoyl peroxide, and 0.5 grams of PVA in proportion, raise the temperature, and react at a reaction temperature of 70 ° C for 8 hours to obtain surface-polymerized nano-palladium. Inorganic materials, centrifuged for later use

[0084] Other processes are exactly the same as in Example 1:

[0085] A palladium-loaded resin catalyst containing 0.36% of palladium was obtained, product number A3.

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PUM

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Abstract

The invention discloses a method for preparing a supported palladium catalyst by suspension polymerization with participation of nanometer palladium. The method comprises the following steps: adding a nanometer palladium suspending liquid into polymerization by a standard suspension polymerization process of macroporous styrene type cation exchange resin; obtaining a polymer microsphere (polystyrene-DVE) of which nanometer palladium is evenly distributed inside a frame after polymerization; making the surface of the nanometer palladium and a polymeric monomer chemically or physically adsorbed so as to be firmly combined together; and sulfonating the polystyrene-DVE to produce the supported palladium resin catalyst after hanging, washing and drying. The method has the advantages of simple process, easy operation, low cost, high reaction activity, small pollution, high product yield, high purity and recyclable resin; and the prepared resin catalyst can be applied to gasoline ether hydrogenation and methylisobutylketone synthesis processes.

Description

technical field [0001] The invention relates to a preparation process of an ion exchange resin, in particular to a preparation process of a palladium-loaded resin catalyst. technical background [0002] There are some publications on the technology of developing ion-exchange resin-loaded palladium catalysts at home and abroad, such as GB1010260, the disclosed palladium / strongly acidic ion-exchange resin catalyst of US3953517 uses palladium nitrate to impregnate strongly acidic ion-exchange resin, and this resin catalyst is a synthetic methyl isobutyl ketone The main catalyzer, but catalytic activity is lower, selectivity is lower; CN1457927 has announced a kind of palladium / strongly acidic ion exchange resin catalyst, adopts the acidic solution containing palladium and strongly acidic ion exchange resin catalyst to carry out ion exchange; CN1883793 has announced a A nano-palladium catalyst and a preparation method thereof are polymer-supported nano-palladium catalysts obtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J31/10C07C49/04C10G45/10
Inventor 王金明刘文飞张勇
Owner KAIRUI ENVIRONMENTAL PROTECTION TECH