GB231827A - Production of inactive menthol - Google Patents
Production of inactive mentholInfo
- Publication number
- GB231827A GB231827A GB28811/24A GB2881124A GB231827A GB 231827 A GB231827 A GB 231827A GB 28811/24 A GB28811/24 A GB 28811/24A GB 2881124 A GB2881124 A GB 2881124A GB 231827 A GB231827 A GB 231827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thymol
- isomenthol
- menthol
- liquid
- production
- Prior art date
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C35/00—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a ring other than a six-membered aromatic ring
- C07C35/02—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a ring other than a six-membered aromatic ring monocyclic
- C07C35/08—Compounds having at least one hydroxy or O-metal group bound to a carbon atom of a ring other than a six-membered aromatic ring monocyclic containing a six-membered rings
- C07C35/12—Menthol
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The mixture of liquid and solid menthols obtained by the catalytic hydrogenation of thymol is separated by fractional distillation. The fractionation may be effected in vacuo or at atmospheric pressure, the liquid component passing over first. The liquid menthol is then subjected in admixtures with fresh thymol to further hydrogenation, or is first dehydrogenated and the product then hydrogenated in the presence or not of fresh thymol.ALSO:The mixture of menthol and isomenthol obtained by the catalytic hydrogenation of thymol is separated by fractional distillation. The fractionation may be effected in vacuo or at atmospheric pressure, the isomenthol passing over first. The isomenthol is then subjected either alone or with more thymol to further hydrogenation, or is first dehydrogenated to isomenthone and the latter than hydrogenated. p
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE231827X | 1924-04-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB231827A true GB231827A (en) | 1925-09-24 |
Family
ID=5877747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28811/24A Expired GB231827A (en) | 1924-04-04 | 1924-12-01 | Production of inactive menthol |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB231827A (en) |
-
1924
- 1924-12-01 GB GB28811/24A patent/GB231827A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB231827A (en) | Production of inactive menthol | |
GB479255A (en) | Improvements in and relating to processes for working-up aqueous formaldehyde solutions | |
GB244036A (en) | Separation of liquid mixtures by distillation | |
GB421486A (en) | Improvements in the manufacture and production of methylamines | |
GB285394A (en) | Process for the production of inactive menthol (the racemate of natural menthol) | |
GB362457A (en) | Process for the hydrogenation of mesityl oxide | |
GB460248A (en) | Manufacture of 2-aminoquinizarin and the substitution products thereof | |
GB285833A (en) | Process for the manufacture of thymol | |
GB557339A (en) | Improvements in and relating to the production or separation of dicyclopentadiene | |
CA303256A (en) | Process and apparatus for the simultaneous distillation, purifying and dehydration of alcohol obtained from fermented mash | |
ES203544A1 (en) | Procedure to improve the smell and flavor of gross hexaclorociclohexano (Machine-translation by Google Translate, not legally binding) | |
GB358328A (en) | ||
GB510343A (en) | A process of hydrogenating monovinylacetylene | |
GB270612A (en) | Process for dehydrating ethyl alcohol | |
GB475911A (en) | Process for the production of saturated hydrocarbons, in particular of the gasoline range | |
GB376356A (en) | Improvements in the isolation or purification of menthols | |
CA230196A (en) | Carbon distillation and gasification | |
FR817091A (en) | Improvements to devices for the distillation, diffusion, or other similar treatment of pasty, semi-fluid and the like materials | |
GB652417A (en) | A process for refining ethanol | |
CA216715A (en) | Process of converting liquid hydro-carbons | |
ES232719A1 (en) | Procedure for the preparation of carotenoids (Machine-translation by Google Translate, not legally binding) | |
ES200346A1 (en) | A procedure for quick aging and enrichment of substances (Machine-translation by Google Translate, not legally binding) | |
CA307222A (en) | Process of simultaneously distilling, purifying and dehydrating alcohol obtained from fermented mash | |
GB301087A (en) | Process for the manufacture of thymol and menthol | |
GB280924A (en) | Process for the manufacture of thymol, its isomers or homologues and their hydrogenation products |