A PROCESS FOR THE RECOVERY OF ADSORBED PALLADIUM FROM SPENT SILICA

A PROCESS FOR THE RECOVERY OF ADSORBED PALLADIUM FROM SPENT SILICA

The present invention relates to a process for the recovery of precious metals from spent catalysts or adsorbent or inorganic waste. More specifically a process is provided for the recovery of palladium from silica, which is used as an absorbent in column chromatography or as a catalyst support in m...

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Hauptverfasser: HARI, CHAND BAJAJ, RAKSH, VIR JASRA, PRADYUT GHOSH, ARVINDKUMAR, BALVANTRAI BORICHA, PUSHIPITO, KUMAR GHOSH
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Sprache:eng
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CHEMISTRY
COMPOUNDS THEREOF
FERROUS OR NON-FERROUS ALLOYS
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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creator HARI, CHAND BAJAJ
RAKSH, VIR JASRA
PRADYUT GHOSH
ARVINDKUMAR, BALVANTRAI BORICHA
PUSHIPITO, KUMAR GHOSH
description The present invention relates to a process for the recovery of precious metals from spent catalysts or adsorbent or inorganic waste. More specifically a process is provided for the recovery of palladium from silica, which is used as an absorbent in column chromatography or as a catalyst support in many catalysts. The process includes burning the spent silica to oxidize the organic component of the adsorbed Pd-complex, digesting the cooled residue with a mineral acid, filtering the obtained solution to separate out silica residue, adjusting the pH of the filtrate to remove precipitate impurities and raising the pH of the purified filtrate to recover a palladium salt.
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subjects CHEMISTRY
COMPOUNDS THEREOF
FERROUS OR NON-FERROUS ALLOYS
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
title A PROCESS FOR THE RECOVERY OF ADSORBED PALLADIUM FROM SPENT SILICA
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