Method for preparing environment friendly catalyst with gold carried

An environmentally friendly, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as consumption of large distilled water, waste of water resources, and difficulty in post-processing , to achieve the effect of reducing energy consumption, reducing preparation cost and reducing preparation time

Inactive Publication Date: 2006-07-05
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

Such a preparation process consumes a large amount of distilled water, wastes precious water resources, and produces waste water at the same time, resulting in diffi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1:

[0015] The mixed solution of 10ml of 1M ferric nitrate solution and 0.2ml of 0.3M chloroauric acid solution was uniformly placed in a water bath at 20°C, and 30ml (wt) of 10% sodium carbonate solution was added dropwise with vigorous stirring to form a co-precipitation. Adjust the pH to 8, continue to stir for 2h, stand still for 3h, filter, and place at room temperature for 24 hours to allow the catalyst to dry naturally to obtain catalyst cat1. The chlorine-gold atomic ratio is greater than or equal to 2 detected by XPS.

Example Embodiment

[0016] Example 2:

[0017] 10ml of 0.5M ferric nitrate solution and 0.2ml of 0.2M chloroauric acid solution were mixed uniformly, placed in a 70°C water bath, and 20ml (wt) of 10% sodium carbonate solution was added dropwise under vigorous stirring to form a co-precipitation. Adjust the pH to 10, continue to stir for 2h, stand still for 3h, filter, and dry at 80°C for 5 hours to obtain catalyst cat2. The chlorine-gold atomic ratio is greater than or equal to 2 detected by XPS.

Example Embodiment

[0018] Example 3:

[0019] Mix 20 ml of a 0.1M ferric nitrate solution with 0.1 ml of a 0.01M chloroauric acid solution and place them in a water bath at 50°C. Under vigorous stirring, add 10ml (wt) of 5% sodium carbonate solution dropwise to form a co-precipitation. Adjust the pH to 9, continue to stir for 2h, stand still for 3h, filter, and dry at 50°C for 5 hours to obtain catalyst cat3. The chlorine-gold atomic ratio is greater than or equal to 2 detected by XPS.

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PUM

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Abstract

The invention discloses a preparation method of environmentally friendly gold-bearing catalyst. Said method includes the following steps: uniformly mixing carrier iron salt solution and gold salt solution, stirring them at 20-80deg.C, using sodium carbonate as precipitant to make precipitation, regulating final pH value to 7-10, continuously stirring for 1.5-4hr, standing still for 2.5-6hr, filtering and drying for 4-24hr at 20-80deg.C so as to obtain the invented catalyst. Said method has no need of washing or roasting. Said catalyst has the strong potency for resisting poisoning of CI-.

Description

technical field [0001] The invention relates to an environment-friendly preparation method of loaded gold catalyst. Background technique [0002] Since Haruta reported in 1989 that highly dispersed supported gold catalysts prepared by co-precipitation method had unique low-temperature oxidation activity for CO, gold catalysts have received widespread attention. Compared with highly dispersed supported platinum catalysts, the oxidation activity of gold catalysts for CO is an order of magnitude higher, and the production of precious metals such as platinum and palladium is low, the price is relatively high and is greatly affected by the relationship between supply and demand, while gold reserves are abundant. , the output is nearly ten times that of platinum and palladium, and the price is relatively cheap and very stable, so people began to shift more attention to gold catalysts. Supported gold catalysts also exhibit high catalytic activity in other catalytic reactions (such...

Claims

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Application Information

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IPC IPC(8): B01J23/52B01J37/03
Inventor 邓友全乔波涛李雪礼
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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