Recuperação de metais de catalisadores de hidrorrefino usados via fusão com KHSO4 Recovery of elements from spent hydrorefining catalysts after fusion with KHSO4
<abstract language="eng">This work describes a process for metal recovery from spent NiMo and CoMo/Al2O3 commercial hydrorefining catalysts. The samples were treated by fusion with potassium hydrogen sulfate (5 h, 600 ºC) with a KHSO4/catalyst mass ratio of 10:1. After fusion the sol...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2006-07-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000400038 |
| _version_ | 1811193482111352832 |
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| author | Julio Carlos Afonso Neocir da Silva Gustavo Nascimento Salvato Roberto Giovanini Busnardo |
| author_facet | Julio Carlos Afonso Neocir da Silva Gustavo Nascimento Salvato Roberto Giovanini Busnardo |
| author_sort | Julio Carlos Afonso |
| collection | DOAJ |
| description | <abstract language="eng">This work describes a process for metal recovery from spent NiMo and CoMo/Al2O3 commercial hydrorefining catalysts. The samples were treated by fusion with potassium hydrogen sulfate (5 h, 600 ºC) with a KHSO4/catalyst mass ratio of 10:1. After fusion the solid was solubilized in water (100 ºC), leaving silicon compounds as residue. Losses of nickel and cobalt may reach 16 wt% of the amount present in the sample, depending on the silicon content. Soluble metals were isolated by selective precipitation techniques (nickel, cobalt, aluminum) or by solvent extraction with methyl-isobutyl ketone (molybdenum) in a hydrochloric acid medium. All metals were recovered in very good yields except for nickel and cobalt in the presence of considerable amounts of silicon. Soluble wastes consist of potassium/sodium sulfates/chlorides. Solid wastes correspond to about 4 wt% of the catalyst and can be discarded in industrial dumps. |
| first_indexed | 2024-04-12T00:10:32Z |
| format | Article |
| id | doaj.art-7239012142844b9d8095889bdf1ac937 |
| institution | Directory Open Access Journal |
| issn | 0100-4042 1678-7064 |
| language | English |
| last_indexed | 2024-04-12T00:10:32Z |
| publishDate | 2006-07-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-7239012142844b9d8095889bdf1ac9372022-12-22T03:55:58ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70642006-07-0129485686110.1590/S0100-40422006000400038Recuperação de metais de catalisadores de hidrorrefino usados via fusão com KHSO4 Recovery of elements from spent hydrorefining catalysts after fusion with KHSO4Julio Carlos AfonsoNeocir da SilvaGustavo Nascimento SalvatoRoberto Giovanini Busnardo<abstract language="eng">This work describes a process for metal recovery from spent NiMo and CoMo/Al2O3 commercial hydrorefining catalysts. The samples were treated by fusion with potassium hydrogen sulfate (5 h, 600 ºC) with a KHSO4/catalyst mass ratio of 10:1. After fusion the solid was solubilized in water (100 ºC), leaving silicon compounds as residue. Losses of nickel and cobalt may reach 16 wt% of the amount present in the sample, depending on the silicon content. Soluble metals were isolated by selective precipitation techniques (nickel, cobalt, aluminum) or by solvent extraction with methyl-isobutyl ketone (molybdenum) in a hydrochloric acid medium. All metals were recovered in very good yields except for nickel and cobalt in the presence of considerable amounts of silicon. Soluble wastes consist of potassium/sodium sulfates/chlorides. Solid wastes correspond to about 4 wt% of the catalyst and can be discarded in industrial dumps.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000400038spent catalystsmetal recoverywaste management |
| spellingShingle | Julio Carlos Afonso Neocir da Silva Gustavo Nascimento Salvato Roberto Giovanini Busnardo Recuperação de metais de catalisadores de hidrorrefino usados via fusão com KHSO4 Recovery of elements from spent hydrorefining catalysts after fusion with KHSO4 Química Nova spent catalysts metal recovery waste management |
| title | Recuperação de metais de catalisadores de hidrorrefino usados via fusão com KHSO4 Recovery of elements from spent hydrorefining catalysts after fusion with KHSO4 |
| title_full | Recuperação de metais de catalisadores de hidrorrefino usados via fusão com KHSO4 Recovery of elements from spent hydrorefining catalysts after fusion with KHSO4 |
| title_fullStr | Recuperação de metais de catalisadores de hidrorrefino usados via fusão com KHSO4 Recovery of elements from spent hydrorefining catalysts after fusion with KHSO4 |
| title_full_unstemmed | Recuperação de metais de catalisadores de hidrorrefino usados via fusão com KHSO4 Recovery of elements from spent hydrorefining catalysts after fusion with KHSO4 |
| title_short | Recuperação de metais de catalisadores de hidrorrefino usados via fusão com KHSO4 Recovery of elements from spent hydrorefining catalysts after fusion with KHSO4 |
| title_sort | recuperacao de metais de catalisadores de hidrorrefino usados via fusao com khso4 recovery of elements from spent hydrorefining catalysts after fusion with khso4 |
| topic | spent catalysts metal recovery waste management |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000400038 |
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