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Preparation method of porous hydroxyapatite supported platinum catalyst

A technology of hydroxyapatite and platinum catalysts is applied in the preparation of organic compounds, chemical instruments and methods, catalysts for physical/chemical processes, etc. , the effect of uniform aperture

Active Publication Date: 2020-06-19
苏州彼定新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal mesh catalysts (such as platinum mesh, silver mesh) have limited application range and dosage

Method used

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  • Preparation method of porous hydroxyapatite supported platinum catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of porous hydroxyapatite supported platinum catalyst comprises the following steps:

[0027] S1. Weigh and prepare the alcohol solutions of calcium nitrate and phosphorus pentoxide respectively, and then put P 2 o 5 Alcoholic solution was added dropwise to Ca(NO 3 ) 2 4H 2 In the solution of O, heat and stir to obtain a colorless transparent solution;

[0028] S2. Dehydrate lanthanum nitrate, and then La(NO 3 ) 3 Doping with the colorless transparent solution in step S1 in proportion, and fully reacting, wherein, the molar ratio of (Ca+La) / P is 1.67, and the molar ratio of Ca and La is 9.5:0.5;

[0029] S3. After the reaction is complete, add sodium hexametaphosphate, and adjust the pH to obtain a sol;

[0030] S4. Ultrasonic treatment is performed on the sol. The ultrasonic treatment method is the first 12h, ultrasonic treatment for 3min every 0.5h, and then every 24h, ultrasonic treatment for 2min;

[0031] S5. After ultrasonic treatment...

Embodiment 2

[0034] The preparation method of porous hydroxyapatite supported platinum catalyst comprises the following steps:

[0035] S1. Weigh and prepare the alcohol solutions of calcium nitrate and phosphorus pentoxide respectively, and then put P 2 o 5 Alcoholic solution was added dropwise to Ca(NO 3 ) 2 4H 2 In the solution of O, heat and stir to obtain a colorless transparent solution;

[0036] S2. dehydrate the lanthanum nitrate, then Ce(NO 3 ) 3 Doping with the colorless transparent solution in step S1 in proportion, and fully reacting, wherein, the molar ratio of (Ca+Ce) / P is 1.67, and the molar ratio of Ca and Ce is 9:1;

[0037] S3. After the reaction is complete, add sodium polyacrylate, and adjust the pH to obtain a sol;

[0038] S4. Ultrasonic treatment is performed on the sol. The ultrasonic treatment method is the first 12 hours, ultrasonic treatment for 5 minutes every 1 hour, and then every 24 hours, ultrasonic treatment for 4 minutes;

[0039] S5. After ultraso...

Embodiment 3

[0042] The preparation method of porous hydroxyapatite supported platinum catalyst comprises the following steps:

[0043] S1. Weigh and prepare the alcohol solutions of calcium nitrate and phosphorus pentoxide respectively, and then put P 2o 5 Alcoholic solution was added dropwise to Ca(NO 3 ) 2 4H 2 In the solution of O, heat and stir to obtain a colorless transparent solution;

[0044] S2. Dehydrate lanthanum nitrate, and then Nd(NO 3 ) 3 Doping with the colorless transparent solution in step S1 in proportion, and fully reacting, wherein, the molar ratio of (Ca+Nd) / P is 1.67, and the molar ratio of Ca and Nd is 9.3:0.7;

[0045] S3. After the reaction is complete, add sodium hexametaphosphate or sodium polyacrylate, and adjust the pH to obtain a sol;

[0046] S4. Ultrasonic treatment is carried out on the sol, the ultrasonic treatment method is the first 12h, every 0.5h ultrasonic treatment for 5min, and then every 24h, ultrasonic treatment for 3min;

[0047] S5. Af...

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Abstract

The invention provides a preparation method of a porous hydroxyapatite supported platinum catalyst. The preparation method comprises the following steps: S1. respectively weighing and preparing alcoholic solutions of calcium nitrate and phosphorus pentoxide, dropwisely adding the alcoholic solution of P2O5 into the solution of Ca (NO3) 2.4 H2O, heating and stirring to obtain a colorless transparent solution; S2, dehydrating lanthanum nitrate, then performing doping in Ln (NO3) 3 and the colorless transparent solution in the step S1 in proportion, and performing a sufficient reaction; S3, afterthe reaction is completed, adding a dispersing agent, and adjusting the pH value to obtain sol; S4, carrying out ultrasonic treatment on the sol; S5, after ultrasonic treatment, performing freeze drying, roasting, and obtaining lanthanum-doped modified hydroxyapatite; and S6, taking the lanthanum-doped modified hydroxyapatite as a carrier, adding an H2PtCl6 aqueous solution, reducing with sodiumborohydride, and roasting to finally obtain the porous hydroxyapatite supported platinum catalyst.

Description

technical field [0001] The invention relates to the field of noble metal catalysts, in particular to a method for preparing a porous hydroxyapatite-supported platinum catalyst. Background technique [0002] Precious metal catalysts are an indispensable raw material in the chemical synthesis process, and are widely used in the synthetic pharmaceutical industry, new materials and fine chemical industries; especially in the face of increasingly stringent environmental protection and process safety requirements; precious metals Catalysts have the characteristics of high selectivity and relatively low reaction conditions, and their high value requires that precious metal catalysts must be recycled; therefore, on the one hand, they become necessary in more and more customized synthesis Catalysts. On the other hand, noble metal catalysts are constantly replacing some highly polluting non-ferrous metal catalysts (such as iron, nickel, mercury catalysts) and are being used more and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J35/10C07C221/00C07C225/22
CPCB01J27/1856C07C221/00B01J35/633B01J35/647C07C225/22
Inventor 杨定宁
Owner 苏州彼定新材料科技有限公司
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