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The Ammonia Leaching Method of Recycling the Spent Copper-Chromium Oxide Catalysts

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Abstract:

The spent copper chromium oxide catalyst of furfural hydrogenation was recycled.by ammonia leaching method. This method not only has the characteristics of simple process, low cost, quick effect, but also avoids the use of various oxidants increasing the security of the experimental operation and the generation of carcinogen hexavalent chromium.The experimental results show that the optimum process conditions of ammonia leaching is: the concentration of ammonia 15mol / L, the leaching temperature is at 180 °C, leaching time for 4h, the optimal dosage of (NH4) 2SO4 0.6g/10g. The copper leaching rate can reach more than 80% of the maximum.

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Periodical:

Advanced Materials Research (Volume 1015)

Pages:

430-433

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1015.430

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Online since:

August 2014

Authors:

Zeng Xin Li*, Tang Bin Kuang, Xu Yi Zhou, Qiang Liang, Sheng Peng Liu

Keywords:

Ammonia Leaching, Copper Chromium Oxide, Leaching Rate, Spent Catalysts

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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