| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000313405 |
| ISSN: | 0100-4042 |
| Authors: | Mendonca, Luciano Aragao de1 Adamian, Rupen Afonso, Julio Carlos2 |
| Institutions: | 1Universidade Federal do Rio de Janeiro, Coordenacao dos Programas de Pos Graduacao em Engenharia, Rio de Janeiro. Brasil 2Universidade Federal do Rio de Janeiro, Instituto de Quimica, Rio de Janeiro. Brasil |
| Year: | 2007 |
| Season: | Abr |
| Volumen: | 30 |
| Number: | 2 |
| Pages: | 476-480 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | This work presents a study on the determination of the optimal experimental conditions for processing spent commercial zeolites in order to recover lanthanide elements and eventually other elements. The process is based on the fusion of the sample with potassium hydrogenosulfate (KHSO4). Three experimental parameters were studied: temperature, reaction time and catalyst/flux mass ratio. After fusion the solid was dissolved in water and the amount of insoluble matter was used to determine the efficiency of the process. The optimized experimental parameters depend on the composition of the sample processed. Under such conditions the insoluble residue corresponds to SiO2. Lanthanide elements and aluminum present in solution were isolated by conventional precipitation techniques; the yields were at least 75 wt%. The final generated wastes correspond to neutral colorless solutions containing alkali chlorides/sulfates and solids that can be disposed of in industrial dumps |
| Disciplines: | Química |
| Keyword: | Ingeniería química, Química ambiental, Catalizadores, Zeolitas, Recuperación de metales, Lantánidos, Manejo de residuos |
| Keyword: | Chemistry, Chemical engineering, Environmental chemistry, Catalysts, Zeolites, Metal recovery, Lanthanides, Waste management |
| Full text: | Texto completo (Ver HTML) |
