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Preparation of supported sliver catalyst fibrous membrane and preparation method thereof

A silver catalyst, fiber membrane technology, applied in fiber treatment, spinning solution preparation, textile and papermaking, etc., can solve the problems of uneven size, irregular shape, difficult to obtain the improvement of activity and selectivity, etc. The effect of good performance, regular morphology and good industrial application prospects

Inactive Publication Date: 2015-04-29
HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The supported catalyst particles prepared by the impregnation method used in industry have irregular shape and non-uniform size, and it is difficult to improve the activity and selectivity.

Method used

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  • Preparation of supported sliver catalyst fibrous membrane and preparation method thereof
  • Preparation of supported sliver catalyst fibrous membrane and preparation method thereof
  • Preparation of supported sliver catalyst fibrous membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Get 5mol of p-hydroxyacetophenone, R-substituted ethyl benzoate (R is selected from H, CH 3 or OCH 3 ) 6mol, be dissolved in the refining tetrahydrofuran of 200ml, add weight and be, the NaH of p-hydroxyacetophenone and ethyl benzoate gross mass 1% is as catalyst, NaH is dissolved in 80ml mixed solvent (petroleum ether: tetrahydrofuran=1:9 ), and control the drop rate into the reaction solution, after 1h dropwise, the temperature is controlled at 50-60°C for 36h. After the reaction is completed, first dissolve the filter residue in water, and adjust the pH=6-7, and use 2×400ml of acetic acid Ethyl extraction, and then at 35 ° C, after rotary evaporation of ethyl acetate, ethanol recrystallization to obtain monohydroxy β-diketone compounds.

[0022] Formula 1: R is selected from H, CH 3 or OCH 3

[0023] (2) Dissolve 1mol of silver nitrate inorganic salt, β-diketone compound obtained in step (1) containing 2mol of diketone groups, and 1mol of o-phenanthroline i...

Embodiment 2

[0027] The preparation method of β-diketone silver complex is as shown in Example 1, steps (1), (2),

[0028] (3) Preparation of electrospinning solution: the N,N-dimethylformamide (DMF) solution of polyacrylonitrile (PAN) with a concentration of 10wt% is prepared, and after it is completely dissolved, the polymer content will be 30wt%. Add the β-diketone silver complex solution into the polymer solution, and obtain the electrospinning solution after it is completely dissolved;

[0029] (4) The electrospinning solution prepared in step (3) is electrospun, the spinning voltage is set to 15kV, the distance from the spinning port to the receiver is 20cm, the advancing speed of the syringe pump is 0.5mL / h, and the spinning Using a 9# needle, the silver-loaded silver catalyst fiber membrane was prepared by electrospinning.

Embodiment 3

[0031] The preparation method of β-diketone silver complex is as shown in Example 1, steps (1), (2),

[0032] (3) Preparation of electrospinning solution: the N,N-dimethylformamide (DMF) solution of polyacrylonitrile (PAN) with a concentration of 10wt% is prepared, and after it is completely dissolved, the polymer content will be 50wt%. Add the β-diketone silver complex solution into the polymer solution, and obtain the electrospinning solution after it is completely dissolved;

[0033] (4) The electrospinning solution prepared in step (3) is electrospun, the spinning voltage is set to 15kV, the distance from the spinning port to the receiver is 20cm, and the advancing speed of the syringe pump is 1mL / h. 9# needle, the silver-loaded silver catalyst fiber membrane was prepared by electrospinning.

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Abstract

The invention belongs to the technical field of supported sliver catalysts and relates to a preparation of a supported sliver catalyst fibrous membrane and a preparation method thereof. Beta-diketone sliver complex is successfully prepared by direct fitting, polymer and the Beta-diketone sliver complex are subjected to blended spinning, and the supported sliver catalyst fibrous membrane is prepared through catalysis of the Beta-diketone sliver complex and compatibility of the Beta -diketone sliver complex with the polymer. The method includes the steps of preparing 5 to 15wt% polymer solution, adding the Beta -diketone sliver complex accounting for 10 to 90wt% of the polymer into the polymer solution, and performing electrostatic spinning. The supported sliver catalyst fibrous membrane allows fiber functionalization; nanofiber has good stability and mechanical properties and has efficient catalysis; a catalyst system is low in price and easy to acquire, reaction conditions are mild, the preparation method is simple and easy, and the industrial application prospect is promising.

Description

technical field [0001] The invention belongs to the technical field of loaded silver catalysts, and in particular relates to the preparation and method of a silver-loaded silver catalyst fiber membrane. technical background [0002] The catalyst itself is mostly nanoparticles. Studies have shown that the catalytic performance of materials is closely related to the size and shape of the particles. In particular, nanoparticles with different morphologies expose different crystal faces, resulting in huge differences in activity and selectivity. Therefore, when synthesizing catalyst nanoparticles, it is very important to control their shape while controlling their size and size distribution (Puntes V.F. et al., Science, 2001, 291:2115-2117.). [0003] Although the research on the controllable preparation and performance of "free" colloidal nanoparticles has been developed relatively maturely, the synthesis of "supported" catalysts with controllable morphology is still a common...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/02D01D5/00
Inventor 马贵平方大为聂俊
Owner HANGZHOU INST OF ADVANCED MATERIAL BEIJING UNIV OF CHEM TECH
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