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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 difficulties in post-processing; while high-temperature roasting not only consumes energy, but also emits HCl and NO during the roasting process. x other polluting gases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

Embodiment 2

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

Embodiment 3

[0019] Mix 20ml of 0.1M ferric nitrate solution with 0.1ml of 0.01M chloroauric acid solution, place in a water bath at 50°C, and add 10ml (wt) 5% sodium carbonate solution dropwise under vigorous stirring to form a co-precipitation. Adjust the pH to 9, continue to stir for 2 hours, let stand for 3 hours, filter, and dry at 50°C for 5 hours to obtain the catalyst cat3. Its 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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