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Expired
Application number
GB7612/60A
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Bayer AG
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Bayer AG
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Publication date
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Publication of GB873669ApublicationCriticalpatent/GB873669A/en
C07D229/00—Heterocyclic compounds containing rings of less than five members having two nitrogen atoms as the only ring hetero atoms
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Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems
(AREA)
Cephalosporin Compounds
(AREA)
Abstract
Anhydrous acetone isohydrazone is recovered from its aqueous solution by adding an alkali metal hydroxide to the solution, separating from one another the two layers formed and rectifying the lighter of the two layers to yield anhydrous acetone isohydrazone. The alkali metal hydroxide is preferably added in the form of a concentrated aqueous solution.
GB7612/60A1959-03-031960-03-03A process for the production of anhydrous acetone isohydrazone
ExpiredGB873669A
(en)
A method of eliminating impurities and recovering potassic hydroxide in the production of potassic permanganate (Machine-translation by Google Translate, not legally binding)