About: http://webisa.webdatacommons.org/95893405

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	As regards the refining operation, suitable refining agents include As2O3, Sb2O3, SnO2, CeO2, and sulfate or fluoro compounds, including mixtures thereof.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com