The importance of pre-treatment of spent hydrotreating catalysts on metals recovery
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Química Nova (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000100027 |
Resumo: | This work describes a three-step pre-treatment route for processing spent commercial NiMo/Al2O3 catalysts. Extraction of soluble coke with n-hexane and/or leaching of foulant elements with oxalic acid were performed before burning insoluble coke under air. Oxidized catalysts were leached with 9 mol L-1 sulfuric acid. Iron was the only foulant element partially leached by oxalic acid. The amount of insoluble matter in sulfuric acid was drastically reduced when iron and/or soluble coke were previously removed. Losses of active phase metals (Ni, Mo) during leaching with oxalic acid were compensated by the increase of their recovery in the sulfuric acid leachate. |
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The importance of pre-treatment of spent hydrotreating catalysts on metals recoveryspent catalystmetals recoveryfoulant elementsThis work describes a three-step pre-treatment route for processing spent commercial NiMo/Al2O3 catalysts. Extraction of soluble coke with n-hexane and/or leaching of foulant elements with oxalic acid were performed before burning insoluble coke under air. Oxidized catalysts were leached with 9 mol L-1 sulfuric acid. Iron was the only foulant element partially leached by oxalic acid. The amount of insoluble matter in sulfuric acid was drastically reduced when iron and/or soluble coke were previously removed. Losses of active phase metals (Ni, Mo) during leaching with oxalic acid were compensated by the increase of their recovery in the sulfuric acid leachate.Sociedade Brasileira de Química2011-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000100027Química Nova v.34 n.1 2011reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422011000100027info:eu-repo/semantics/openAccessPereira,Alexandre Luiz de SouzaSilva,Cristiano Nunes daAfonso,Júlio CarlosMantovano,José Luizeng2011-02-10T00:00:00Zoai:scielo:S0100-40422011000100027Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2011-02-10T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
The importance of pre-treatment of spent hydrotreating catalysts on metals recovery |
title |
The importance of pre-treatment of spent hydrotreating catalysts on metals recovery |
spellingShingle |
The importance of pre-treatment of spent hydrotreating catalysts on metals recovery Pereira,Alexandre Luiz de Souza spent catalyst metals recovery foulant elements |
title_short |
The importance of pre-treatment of spent hydrotreating catalysts on metals recovery |
title_full |
The importance of pre-treatment of spent hydrotreating catalysts on metals recovery |
title_fullStr |
The importance of pre-treatment of spent hydrotreating catalysts on metals recovery |
title_full_unstemmed |
The importance of pre-treatment of spent hydrotreating catalysts on metals recovery |
title_sort |
The importance of pre-treatment of spent hydrotreating catalysts on metals recovery |
author |
Pereira,Alexandre Luiz de Souza |
author_facet |
Pereira,Alexandre Luiz de Souza Silva,Cristiano Nunes da Afonso,Júlio Carlos Mantovano,José Luiz |
author_role |
author |
author2 |
Silva,Cristiano Nunes da Afonso,Júlio Carlos Mantovano,José Luiz |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Pereira,Alexandre Luiz de Souza Silva,Cristiano Nunes da Afonso,Júlio Carlos Mantovano,José Luiz |
dc.subject.por.fl_str_mv |
spent catalyst metals recovery foulant elements |
topic |
spent catalyst metals recovery foulant elements |
description |
This work describes a three-step pre-treatment route for processing spent commercial NiMo/Al2O3 catalysts. Extraction of soluble coke with n-hexane and/or leaching of foulant elements with oxalic acid were performed before burning insoluble coke under air. Oxidized catalysts were leached with 9 mol L-1 sulfuric acid. Iron was the only foulant element partially leached by oxalic acid. The amount of insoluble matter in sulfuric acid was drastically reduced when iron and/or soluble coke were previously removed. Losses of active phase metals (Ni, Mo) during leaching with oxalic acid were compensated by the increase of their recovery in the sulfuric acid leachate. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000100027 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000100027 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0100-40422011000100027 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Química Nova v.34 n.1 2011 reponame:Química Nova (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Química Nova (Online) |
collection |
Química Nova (Online) |
repository.name.fl_str_mv |
Química Nova (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
quimicanova@sbq.org.br |
_version_ |
1750318111554273280 |