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Ruthenium precursor for preparing ruthenium carbon catalyst and preparation method of catalyst

A technology of ruthenium carbon catalyst and ruthenium precursor, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Surface area reduction and other issues, to achieve the effect of simple control, low cost, and small particle size

Active Publication Date: 2016-07-20
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polyvinylpyrrolidone is not widely used in the field of supported noble metal catalysts, mainly because it will be adsorbed on the surface of the carrier to reduce the specific surface area of ​​the carrier, thereby affecting the adsorption of the carrier to the active center of the catalyst.

Method used

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  • Ruthenium precursor for preparing ruthenium carbon catalyst and preparation method of catalyst
  • Ruthenium precursor for preparing ruthenium carbon catalyst and preparation method of catalyst
  • Ruthenium precursor for preparing ruthenium carbon catalyst and preparation method of catalyst

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Embodiment 1

[0025] The ruthenium precursor of this embodiment is prepared according to the following method:

[0026] Step 1, sodium formate is added in the ruthenium trichloride solution that concentration is 0.01g / mL, stirs to obtain mixed solution; The quality of described sodium formate is 5 times of the ruthenium mass in ruthenium trichloride;

[0027] Step 2. Heat the mixed solution described in step 1 to 70°C, then add polyvinylpyrrolidone (PVP-K30) to the heated mixed solution, and stir until the polyvinylpyrrolidone is completely dissolved to obtain a dark green solution that is used for The ruthenium precursor of the ruthenium carbon catalyst is prepared; the quality of the polyvinylpyrrolidone is twice that of the ruthenium in ruthenium trichloride.

[0028] The method for preparing ruthenium carbon catalyst (ruthenium loading is 5%) using the ruthenium precursor of the present embodiment is:

[0029] Step 1. Place activated carbon (the quality of activated carbon is 19 times ...

Embodiment 2

[0033] The ruthenium precursor of this embodiment is prepared according to the following method:

[0034] Step 1, sodium formate is added in the ruthenium nitrate solution that concentration is 0.1g / mL, stirs to obtain mixed solution; The quality of described sodium formate is 2 times of the ruthenium quality in ruthenium nitrate;

[0035] Step 2. Heat the mixed solution described in step 1 to 90°C, then add polyvinylpyrrolidone (PVP-K15) to the heated mixed solution, and stir until the polyvinylpyrrolidone is completely dissolved to obtain a dark green solution that is used for The ruthenium precursor of the ruthenium carbon catalyst is prepared; the quality of the polyvinylpyrrolidone is twice that of the ruthenium in the ruthenium nitrate.

[0036] The method for preparing ruthenium carbon catalyst (ruthenium loading is 5%) using the ruthenium precursor of the present embodiment is:

[0037] Step 1. Place activated carbon (the quality of activated carbon is 19 times the ma...

Embodiment 3

[0041] The ruthenium precursor of this embodiment is prepared according to the following method:

[0042] Step 1, sodium formate is added concentration is in the ruthenium acetate solution of 0.05g / mL, stirs to obtain mixed solution; The quality of described sodium formate is 5 times of ruthenium quality in ruthenium acetate;

[0043] Step 2. Heat the mixed solution described in step 1 to 80°C, then add polyvinylpyrrolidone (PVP-K25) to the heated mixed solution, and stir until the polyvinylpyrrolidone is completely dissolved to obtain a dark green solution that is used for The ruthenium precursor of the ruthenium carbon catalyst is prepared; the quality of the polyvinylpyrrolidone is 5 times that of the ruthenium in the ruthenium acetate.

[0044] The method for preparing ruthenium carbon catalyst (ruthenium loading is 5%) using the ruthenium precursor of the present embodiment is:

[0045] Step 1. Place activated carbon (the quality of activated carbon is 19 times the mass ...

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Abstract

The invention discloses a ruthenium precursor for preparing a ruthenium carbon catalyst. The preparation method comprises the following steps: 1, adding sodium formate into a soluble ruthenium salt solution, and uniformly stirring to obtain a mixed solution; 2, adding the mixed solution to polyvinyl pyrrolidone after heating, stirring and dissolving to obtain the ruthenium precursor. Furthermore, the invention further provides a method for preparing the ruthenium carbon catalyst by using the ruthenium precursor. According to the invention, the reaction of sodium formate and ruthenium salt is used, and the new ruthenium precursor is generated under the action of polyvinyl pyrrolidone, sodium formate can form a complex with Ru(III) to obviously lower the reduction potential of metal ruthenium (Ru), the complexation of Ru (III) and sodium formate lowers the reduction potential of Ru, polyvinyl pyrrolidone is used as a very weak reducing agent, but can reduce Ru (III) to other valence states in the invention, and in the process of heating, the color of the ruthenium precursor is changed from brownish black to dark green.

Description

technical field [0001] The invention belongs to the technical field of supported catalysts, and in particular relates to a ruthenium precursor for preparing a ruthenium carbon catalyst and a preparation method of the catalyst. Background technique [0002] Noble metals play an important role in the field of catalysis, and many of them have been industrialized. Due to its unique electronic structure, Ru atoms have abundant oxidation states, so there are more and more synthesis and researches on Ru catalysts in recent years. Among the platinum group elements, Ru is the noble metal element with the least content in the earth's crust. Improving its specific surface area and dispersion degree on the support carrier can improve the utilization rate of Ru element and reduce the catalyst cost. It is a current research hotspot. [0003] Supported Ru catalysts are widely used in ammonia synthesis, Fischer-Tropsch (F-T) synthesis, catalytic hydrogenation and other fields. Current res...

Claims

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Application Information

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IPC IPC(8): B01J23/46C07C61/08C07C51/36
CPCB01J23/462C07C51/36C07C61/08
Inventor 张磊李小虎朱柏烨曾利辉曾永康张之翔
Owner XIAN CATALYST NEW MATERIALS CO LTD
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