About: http://webisa.webdatacommons.org/155434879

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	The desired cut may be hydrofined and then treated with caustic and adsorbents such as silica gel, alumina, activated char or zeolite to secure the desired purity.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr