The importance of pre-treatment of spent hydrotreating catalysts on metals recovery

Bibliographic Details
Main Author: Pereira,Alexandre Luiz de Souza
Publication Date: 2011
Other Authors: Silva,Cristiano Nunes da, Afonso,Júlio Carlos, Mantovano,José Luiz
Format: Article
Language: eng
Source: Química Nova (Online)
Download full: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000100027
Summary: 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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spelling 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
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