About: http://webisa.webdatacommons.org/186320900

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	A process as claimed in claim 1, wherein the reducing agent is an ammonium sulfhydrate solution or a mixture thereof with a slight excess of ammonia or hydrogen sulphide.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com