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PROCESS FOR THE COMPREHENSIVE RECOVERY OF METAL COBALT, RUTHENIUM AND ALUMINUM FROM WASTE CATALYST CO-RU/AL2O3 IN FISCHER-TROPSCH SYNTHESIS.
PROCESS FOR THE COMPREHENSIVE RECOVERY OF METAL COBALT, RUTHENIUM AND ALUMINUM FROM WASTE CATALYST CO-RU/AL2O3 IN FISCHER-TROPSCH SYNTHESIS.
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机译:费托合成中废催化剂CO-RU / AL2O3中金属钴,钌和铝的综合回收方法
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摘要
Provided is a process for the comprehensive recovery of metal cobalt, ruthenium and aluminum from a waste catalyst Co-Ru/Al2O3 in a Fischer-Tropsch synthesis. First, a waste catalyst is subjected to hydrocarbon removal, and reduction treatment, to effectively separate a cobalt slag in an alkali fusion step, and then the cobalt slag is subjected to the steps of acid leaching, cobalt precipitation with oxalic acid or ammonium oxalate, reduction of cobalt oxalate, dissolution of metal cobalt with nitric acid, etc., to obtain Co(�O3)2•6Η2O. A ruthenate which is dissolved by steps such as alkali fusion, and leaching with deionized water, is subjected to the steps of reduction with ethanol, dissolution with concentrated hydrochloric acid, distillation under reduced pressure, etc., to obtain a β-RuCl3•XH2O product with a high purity. Aluminum hydroxide is prepared from a meta-aluminate solution by CO2 carbonation, by controlling the parameters such as reaction temperature, flow rate of CO2, pH value at the end point of the reaction, etc., and the aluminum hydroxide is calcined to obtain aluminum oxide with a product quality achieving the quality requirements of first-class aluminum oxide in the Chinese national standard. The resulting product has a high yield, wherein cobalt is ≥ 97%, ruthenium is ≥ 95%, and aluminum is ≥ 92%.
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