Continuous process for the production of d,l{40 menthol

Continuous process for production of d,l, menthol by hydrogenation of thymol or other compound having the carbon skeleton of menthol and which is substituted by oxygen (oxygen or hydroxy) in the 4-position. A cobalt-manganese catalyst is used which contains 10 to 40% by weight of manganese based on...

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Bibliographische Detailangaben
Hauptverfasser:	BIEDERMANN, WOLFGANG
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Continuous process for production of d,l, menthol by hydrogenation of thymol or other compound having the carbon skeleton of menthol and which is substituted by oxygen (oxygen or hydroxy) in the 4-position. A cobalt-manganese catalyst is used which contains 10 to 40% by weight of manganese based on the total quantity of oxidic cobalt and oxidic manganese. High conversion are obtained and the built up of by-products is low. The catalyst is similarly effective for rearrangement of isomers of menthol to product d,l-menthol.