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Hydroxide loading palladium catalyst and method for producing the same

A technology of hydroxide and palladium catalysts, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, catalyst carriers, etc., can solve the problem of insufficient activity of palladium catalysts, and achieve improved catalyst activity, high carrier dispersion, and high ratio The effect of surface area

Inactive Publication Date: 2008-06-11
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of traditional preparation methods, the activity of palladium catalysts for some reactions is not high enough, and the application of palladium catalysts is therefore limited to a certain extent.
Therefore, with the discovery and development of new technologies for the preparation of various catalysts, the research on the preparation of palladium catalysts is far from over.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1M Fe(NO 3 ) 3 Solution 10ml with 0.29M H 2 PdCl 4 Mix 0.05ml of the solution evenly, add dropwise to 36ml of 1M NaCO under vigorous stirring 3 Co-precipitation was formed in the solution, the pH value was adjusted to 9, continued to stir for 2 hours, stood still for 2.5 hours, filtered, washed with distilled water, and left at 20°C for 24 hours to allow the catalyst to dry naturally to obtain the desired catalyst.

Embodiment 2

[0019] 1M Fe(NO 3 ) 3 Solution 10ml 0.29M H 2 PdCl 4 Mix 0.2ml of the solution evenly, add it dropwise to 20ml of 1M NaOH solution under strong stirring to form co-precipitation, adjust the pH value to 8, continue to stir for 2h, let it stand for 2.5h, filter, wash with distilled water, and dry at 50°C for 10 hours. obtain the required catalyst.

Embodiment 3

[0021] 1M Fe(NO 3 ) 3 Solution 10ml with 0.35M (NH 4 ) 2 PdCl 4 Mix 0.2ml of the solution evenly, add dropwise to 30ml of 1M K under vigorous stirring 2 CO 3 Co-precipitation was formed in the solution, adjust the pH value to 8, continue to stir for 2h, let it stand for 2.5h, filter, wash with distilled water, dry at 50°C for 10 hours, 50°C in 10% H 2 After reduction for 2 hours, the desired catalyst was obtained.

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PUM

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Abstract

The invention relates to a hydroxide carried palladium catalyst and a process for preparation. A carrier of the catalyst is hydroxide, an active component is palladium, and the hydroxide is iron hydroxide or cobalt hydroxide or manganese hydroxide or nickel hydroxide or aluminum hydroxide. The invention adopts the method of co-precipitation. The catalyst has a comparatively high specific surface area and a comparatively high dispersing degree of the carrier. Steps of high-temperature drying, roasting and the like are not needed in the process for preparation, the invention saves energy consumption and doesn't discharge pollution gas, and the process for preparation is friendly to environment.

Description

technical field [0001] The invention relates to a hydroxide-supported palladium catalyst and a preparation method thereof. Background technique [0002] Catalyst preparation technology plays a very important role in controlling the physicochemical properties of supported catalysts and the performance of catalysts in chemical reactions. A typical example is supported gold catalysts: Gold has always been considered as a catalytically inert metal. However, in the 1980s, Japanese scholar Haruta found that gold was highly dispersed on a suitable carrier by coprecipitation, precipitation-deposition and other methods. , gold catalysts show unique low-temperature activity for carbon monoxide oxidation, and gold catalysts are found to have good catalytic activity for many reactions, thus triggering a research upsurge on gold catalysts. [0003] At present, most commercial supported catalysts are prepared by impregnation method - impregnating the salt solution of the active component...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/44B01J32/00B01J37/03
Inventor 邓友全乔波涛刘乐全
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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