GB676576A - Improvements in or relating to the preparation of carbazole - Google Patents
Improvements in or relating to the preparation of carbazoleInfo
- Publication number
- GB676576A GB676576A GB17074/50A GB1707450A GB676576A GB 676576 A GB676576 A GB 676576A GB 17074/50 A GB17074/50 A GB 17074/50A GB 1707450 A GB1707450 A GB 1707450A GB 676576 A GB676576 A GB 676576A
- Authority
- GB
- United Kingdom
- Prior art keywords
- carbazole
- solvent
- relating
- preparation
- water
- 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
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/88—Carbazoles; Hydrogenated carbazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the ring system
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Indole Compounds (AREA)
Abstract
Carbazole is prepared from carbazole sulphate or carbazole sulphate containing material by decomposition with water in the presence of a water-immiscible solvent for the liberated carbazole. The reaction temperature is preferably increased from 20-30 DEG C. initially to the B.P. of the carbazole solution. Carbazole is recovered from the solvent by crystallization or evaporation in steam. The solvent may be, for example, a hydrocarbon, e.g. benzene or toluene, ether, or chlorobenzene. An example of the process is given. Specification 676,575 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL676576X | 1949-07-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB676576A true GB676576A (en) | 1952-07-30 |
Family
ID=19802300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17074/50A Expired GB676576A (en) | 1949-07-08 | 1950-07-07 | Improvements in or relating to the preparation of carbazole |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB676576A (en) |
-
1950
- 1950-07-07 GB GB17074/50A patent/GB676576A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1022959A (en) | Improvements relating to the production of olefines | |
GB823709A (en) | Manufacture of a triazine derivative | |
GB676576A (en) | Improvements in or relating to the preparation of carbazole | |
GB955682A (en) | Production of aromatic sulfonyl chlorides | |
GB754756A (en) | Improvements in or relating to the manufacture of thiocarbohydrazide | |
GB638393A (en) | Improvements in and relating to the production of sterols and their addition products from material containing sterols | |
ES323157A1 (en) | A procedure for the preparation of omega-laurino-lactama, to start ciclododecanona. (Machine-translation by Google Translate, not legally binding) | |
GB1184311A (en) | Process for the Manufacture of Propanesultone | |
GB1142718A (en) | Process for the production of olefinically unsaturated compounds | |
GB892788A (en) | Process for the preparation of organic sulphohalides | |
GB855586A (en) | Process for the manufacture and recovery of chlorendic acid | |
GB902058A (en) | Process for the preparation of di-benzoxazolyl-ethylene compounds | |
GB710880A (en) | Desulphonation of sulphonated compounds | |
GB781559A (en) | Production of dry n, n-diisopropyl-2-benzothiazolesulfenamide | |
GB1102678A (en) | Process for preparing cobalamine-sulphonic acid | |
GB742450A (en) | Improvements in or relating to piperazine derivatives and process of preparing the same | |
GB893732A (en) | Process for preparing vinylaromatic sulfonic acid salts | |
GB1117376A (en) | Process for producing granular 2,6-ditertiarylbutyl-4-methylphenol | |
GB728563A (en) | Method of decomposing sulphite liquors at elevated temperatures and pressures | |
GB987382A (en) | Improved process for the production of monochlorobenzene | |
GR23282B (en) | METHOD FOR THE PREPARATION OF DIVENZO (A, D) CYCLES (1, 4) OF DIENES AND ACID SALTS ADDED THESE. | |
GB667642A (en) | Improved method for the preparation of benzene hexachloride | |
GB852097A (en) | Improvements in and relating to butadiene monoxide | |
GB575604A (en) | Improvements in and relating to the manufacture of organic nitrogen compounds | |
GB749482A (en) | Process for the production of tricyclodecane-dicarboxylic acid |