Abstract

A large amount of molybdenum-bearing spent HDS catalysts are produced in the process of petroleum refining. After extraction of Mo from the spent HDS catalyst, a molybdenum extraction residue containing aluminum, nickel, and cobalt was obtained. In the work presented herein, extraction of aluminum from the molybdenum extraction residue by sodium hydroxide roasting followed by water leaching was investigated. The effects of sodium hydroxide roasting and water leaching on the extraction of aluminum as well as the kinetics of aluminum leaching were studied in detail. It was found that under the optimal conditions, the roasting of molybdenum extraction residue with 60 wt% sodium hydroxide addition at 800 °C for 2 h followed by water leached at 95 °C for 10 min with a liquid–solid ratio of 4 mL/g resulted in the leaching of aluminum up to 91.9%. Kinetics analysis showed that the aluminum leaching process was controlled by diffusion, and the leaching activation energy was determined to be 6.77 kJ/mol.

Graphical Abstract

中文翻译：

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从废加氢脱硫催化剂的钼萃取残渣中回收铝

摘要

在石油精炼过程中会产生大量的含钼废HDS催化剂。从用过的HDS催化剂中提取Mo后，获得了含有铝，镍和钴的钼提取残留物。在本文提出的工作中，研究了通过氢氧化钠焙烧然后水浸出从钼提取残渣中提取铝。详细研究了氢氧化钠焙烧和水浸出对铝提取的影响以及铝浸出的动力学。结果发现，在最佳条件下，钼萃取残留物在800°C的焙烧下加入60 wt％氢氧化钠焙烧2 h，然后在95°C的条件下以4 mL / L的水浸出水焙烧10 min。 g导致铝的浸出高达91.9％。

图形概要