GB344970A - Process for the manufacture of thymol and its isomers and homologues - Google Patents
Process for the manufacture of thymol and its isomers and homologuesInfo
- Publication number
- GB344970A GB344970A GB39457/29A GB3945729A GB344970A GB 344970 A GB344970 A GB 344970A GB 39457/29 A GB39457/29 A GB 39457/29A GB 3945729 A GB3945729 A GB 3945729A GB 344970 A GB344970 A GB 344970A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cresol
- thymol
- dyes
- acetone
- class
- 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
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
- C07C37/50—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions decreasing the number of carbon atoms
- C07C37/52—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by reactions decreasing the number of carbon atoms by splitting polyaromatic compounds, e.g. polyphenolalkanes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Thymol, its isomers and homologues are prepared by first heating the condensation products of m- or p-cresol with aliphatic ketones, see Specification 273,684, [Class 2 (iii), Dyes &c.], to a temperature of about 300 DEG C. in a stream of hydrogen and then passing the decomposition products still admixed with hydrogen over an hydrogenating catalyst at a temperature of about 200 DEG C. to effect hydrogenation of the alkylene-phenols present. Examples are given of the preparation of thymol from the condensation product of m-cresol and acetone, and of 4-methyl-6-isopropylphenol from the condensation product of p-cresol and acetone, using nickel on pumice as the catalyst. Specification 273,686, [Class 2 (iii), Dyes &c.], also is referred to.ALSO:Thymol, its isomers and homologues are prepared by first heating the condensation products of m- or p-cresol with aliphatic ketones (see Specification 273,684, [Class 2 (iii), Dyes &c.]), to a temperature of about 300 DEG C. in a stream of hydrogen and then passing the decomposition products still admixed with hydrogen over an hydrogenating catalyst at a temperature of about 200 DEG C. to effect hydrogenation of the alkylene-phenols present. Examples are given of the preparation of thymol from the condensation product of m-cresol and acetone, and of 4-methyl-6-isopropylphenol from the condensation product of p-cresol and acetone, using nickel on pumice as the catalyst. Specification 273,686, [Class 2 (iii), Dyes &c.], also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE344970X | 1928-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB344970A true GB344970A (en) | 1931-03-19 |
Family
ID=6254312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB39457/29A Expired GB344970A (en) | 1928-12-31 | 1929-12-24 | Process for the manufacture of thymol and its isomers and homologues |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB344970A (en) |
-
1929
- 1929-12-24 GB GB39457/29A patent/GB344970A/en not_active Expired
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