GB753764A - Improvements relating to sulphur dyestuffs - Google Patents
Improvements relating to sulphur dyestuffsInfo
- Publication number
- GB753764A GB753764A GB13086/54A GB1308654A GB753764A GB 753764 A GB753764 A GB 753764A GB 13086/54 A GB13086/54 A GB 13086/54A GB 1308654 A GB1308654 A GB 1308654A GB 753764 A GB753764 A GB 753764A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dyestuff
- hydroxydiphenylamine
- sulphur
- ring
- 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
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B49/00—Sulfur dyes
- C09B49/10—Sulfur dyes from diphenylamines, indamines, or indophenols, e.g. p-aminophenols or leucoindophenols
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Sulphur dyes are made by fusing 1 part of a 4-hydroxydiphenylamine of the formula:- <FORM:0753764/IV(c)/1> in which ring A can be substituted with halogen and ring B can be substituted with alkyl of 1-4 carbon atoms, whilst at least one position ortho to the -NH- group in ring B is free, with 1.5 to 3 parts of the iron-free alkali polysulphide Me2Sx (where x is 5-7) or a corresponding mixture of alkali sulphide and sulphur, in presence of water-soluble organic solvents which boil over 100 DEG C. and water, isolating the raw dyestuff obtained and oxidizing in an alkaline dispersion in absence of inorgaic sulphur compounds. The products dye cellulose or vegetable fibres red-brown shades. Organic solvents specified are pyridine, picoline, collidine, butanol, cyclohexanal, ethylene glycol and its ethyl or methyl ether, diethylene glycol and its methyl ether. The dyestuff may be isolated by diluting the sulphurization melt with water, removing the solvent by steam distillation, and either precipitating the dyestuff as its leuco compound by salting out or by addition of acids, or by oxidizing with air. After freeing from adherent inorganic sulphur compounds, the dyestuff may be airblown in caustic soda solution. Examples describe the application of the foregoing treatment to (1) 4-hydroxydiphenylamine, (2) 4-hydroxy-41 (or 31 or 21)- methyldiphenylamine, (3) 2-methyl-5-isopropyl-41-hydroxydiphenylamine, (4) 4-hydroxy - 21.51 - dimethyldiphenylamine. Dyeing examples are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH753764X | 1953-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB753764A true GB753764A (en) | 1956-08-01 |
Family
ID=4534104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13086/54A Expired GB753764A (en) | 1953-05-08 | 1954-05-05 | Improvements relating to sulphur dyestuffs |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB753764A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4403995A (en) | 1981-04-07 | 1983-09-13 | Cassella Aktiengesellschaft | Sulphur dyestuffs, a process for their manufacture and their use from hydroxy-diphenylamine compounds |
-
1954
- 1954-05-05 GB GB13086/54A patent/GB753764A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4403995A (en) | 1981-04-07 | 1983-09-13 | Cassella Aktiengesellschaft | Sulphur dyestuffs, a process for their manufacture and their use from hydroxy-diphenylamine compounds |
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