<http://webisa.webdatacommons.org/305259167> <http://www.w3.org/ns/prov#value> "C. The reaction time depends on the temperature and is ordinarily from 1/2 hour to 5 hours, preferably from 1 to 3 hours.Suitable organic solvents employed as reaction medium are cycloaliphatic or, preferably, aromatic hydrocarbons, for example cyclohexane, benzene, toluene or xylene; chlorinated hydrocarbons such as ethylene chloride, tetrachloroethylene, orchlorobenzenes, e.g. chlorobenzene, chl" . <http://webisa.webdatacommons.org/prov/83490368> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/305259167> . <http://webisa.webdatacommons.org/305259167> <http://www.w3.org/ns/prov#wasQuotedFrom> <patentgenius.com> . <http://webisa.webdatacommons.org/305259167> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> .