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Preparation method of chlorine-free ruthenium-based catalyst impregnation liquid

A technology of impregnating liquid and catalyst, which is applied in the field of preparation of impregnating liquid for supported catalysts, can solve the problems such as easy reaction between potassium ruthenate and reducing carrier, and achieve the effects of reduced preparation process, large economic benefits and high activity

Inactive Publication Date: 2015-06-10
福州科盛催化材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a method that is simple, convenient and reliable to operate, and can solve the shortcoming that the existing use of potassium ruthenate is easy to react with the reducing carrier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Use a pipette to draw up 6% K 2 RuO 4 Solution 10mL, add 2mL ethylene glycol solution with a purity of 99.9%, stir evenly, neutralize with nitric acid with a concentration of 65% until the pH value of the mixture is 2, and place it until the liquid does not contain solid particles. A good ruthenium-alcohol nitrate complex solution containing ruthenium and potassium nitrate is added with 2 mL of magnesium nitrate solution with a concentration of 10%. After stirring evenly, the mixed solution can be used as a ruthenium-based catalyst impregnation solution.

Embodiment 2

[0021] Repeat the process of embodiment 1, just change alcohol into the propylene glycol that purity is 99.9%, and K 2 RuO 4 After the solution is evenly stirred, it is titrated and neutralized with 65% nitric acid until the pH value of the mixture is 2, and it is placed until the liquid does not contain solid particles and has good light transmittance. Salt complex solution, which can be used as impregnation solution for ruthenium-based catalysts.

Embodiment 3

[0023] Repeat the process of embodiment 1, just change alcohol into the glycerol that purity is 99.9%, and K 2 RuO 4 After the solution is evenly stirred, titrate and neutralize the mixture with 65% nitric acid until the pH value of the mixture is 2, and place it until the liquid does not contain solid particles, and the ruthenium and alcohol nitrates containing ruthenium and potassium nitrates with good light transmittance After adding 4mL of barium nitrate solution with a concentration of 4% to the complex solution and stirring evenly, the mixed solution can be used as a ruthenium-based catalyst impregnating solution.

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Abstract

The invention discloses a preparation method of a chlorine-free ruthenium-based catalyst impregnation liquid, and belongs to the technical field of supported catalyst impregnation liquid preparation. The component of the chlorine-free ruthenium-based catalyst impregnation liquid is characterized in that potassium ruthenate is adopted as a ruthenium precursor, polyol and nitric acid are adopted as ligands, and the solution system of a ruthenium and alcohol nitrate complex solution also contains potassium, sodium, cesium, rubidium and alkali metal nitrate and / or magnesium, calcium, barium and alkaline earth metal nitrate, and / or rare earth metal nitrate. The preparation method of the ruthenium and alcohol nitrate complex solution of the chlorine-free ruthenium-based catalyst impregnation liquid comprises the following steps: mixing the polyol with the potassium ruthenate, and then adding nitric acid; and adding a proper amount of the nitric acid to the polyol, and then adding the potassium ruthenate. The impregnation liquid is simple to prepare, and catalysts prepared through using the impregnation liquid have high activities and good performances. An active component and parts of a cocatalyst are simultaneously impregnated, so the preparation operation of the catalysts is reduced, thereby a large economic benefit can be obtained.

Description

technical field [0001] The invention relates to the technical field of preparation of supported catalyst impregnation solution, in particular to a preparation method of ruthenium-based catalyst impregnation solution. Background technique [0002] In the preparation of traditional impregnated ruthenium-based catalysts, salt solutions such as ruthenium trichloride, ruthenium carbonyl, ruthenium acetate, ruthenium nitrosonitrate, potassium ruthenate, and potassium perruthenate are usually used as ruthenium precursor impregnation solutions. For the occasion where you do not want the system to have chloride ions, when using ruthenium trichloride as the finished product of the ruthenium precursor, chlorine removal is a laborious and time-consuming thing, so it is a good idea to use chlorine-free ruthenium salt as the ruthenium precursor. s Choice. Common chlorine-free ruthenium salts include ruthenium carbonyl, ruthenium acetate, ruthenium oxalate, ruthenium nitrosonitrate, potas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26
Inventor 王榕瞿胜罗本应
Owner 福州科盛催化材料有限公司
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