Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5440/50A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
National Starch and Chemical Investment Holding Corp
Original Assignee
JR Geigy AG
National Starch and Chemical Investment Holding Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JR Geigy AG, National Starch and Chemical Investment Holding CorpfiledCriticalJR Geigy AG
Publication of GB668960ApublicationCriticalpatent/GB668960A/en
1 : 10-Phenanthroline is prepared by a process of treatment of o-phenylene diamine or 8-aminoquinoline with glycerol in presence of sulphuric acid and a dehydrogenating agent, characterized in that the reaction is carried out in the presence of cupric salts and the 1 : 10-phenanthroline is isolated in the form of its copper complex which is then decomposed to give the free base. Preferred conditions are a temperature of 120-140 DEG C., and the use of as a dehydrogenating agent of nitrobenzene sulphonic acid or arsenic acid. Three examples of the process are given.
GB5440/50A1949-03-041950-03-03Process for the production of i.io-phenanthroline
ExpiredGB668960A
(en)