GB613939A - Manufacture of cupriferous disazo-dyestuffs - Google Patents
Manufacture of cupriferous disazo-dyestuffsInfo
- Publication number
- GB613939A GB613939A GB5014/46A GB501446A GB613939A GB 613939 A GB613939 A GB 613939A GB 5014/46 A GB5014/46 A GB 5014/46A GB 501446 A GB501446 A GB 501446A GB 613939 A GB613939 A GB 613939A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acids
- acid
- dihydroxynaphthalene
- dyestuffs
- dyestuff
- 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
Abstract
Cupriferous disazo dyestuffs are manufactured by the action of an agent yielding copper on an asymmetrical disazo-dyestuff of the general formula <FORM:0613939/IV (c)/1> wherein R represents the residue of a dihydroxynaphthalene monosulphonic acid bound to the azo group in a position vicinal to a hydroxy group, and R1 represents the residue of a monohydroxynaphthalenesulphonic acid bound to the azo group in a position vicinal to the hydroxy group and free from amino and substituted amino groups. The treatment may be carried out under relatively mild or relatively intense conditions depending on whether it is desired to hydrolyse the methoxy groups. The products dye cellulose (e.g. cotton or regenerated cellulose) in blue tints. Suitable components for the preparation of the starting materials are, on the one hand (corresponding to R), 1 : 3 : 6-, 1 : 6 : 3-, 1 : 6 : 4-, 1 : 8 : 4-, 2 - 6 : 4-, 2 : 7 : 3- and especially 1 : 7 : 4-and 2 : 8 : 6- dihydroxynaphthalenesulphonic acids, and, on the other hand (corresponding to R1), 1 : 3-, 1 : 4-, 1 : 5-, 2 : 4-, 2 : 5-, 2 : 6-, 2 - 7- and 2 : 8- naphtholsulphonic acids and corresponding di- and tri-sulphonic acids. Examples describe the treatment of dyestuffs from certain of these components with ammoniacal copper solution at 85-90 DEG C., and the dyeing of cotton reddish-blue with the copper compound of the dyestuff 2 : 8-dihydroxynaphthalene - 6 - sulphonic acid \sM dianisidine --> 2 - naphthol - 6 - sulphonic acid, from a bath containing sodium carbonate and, in the later stages, sodium sulphate. The Specification as open to inspection under Sect. 91 comprises also the coppering of dyestuffs of the general formula above in which R1 may contain a second hydroxy group (iu which case it may be identical with R) or an amino or substituted amino group. A further example describes the action of ammoniacal copper solution at 85 DEG -95 DEG C. or at 50 DEG C. on the symmetrical dyestuff dianisidine --> 2 : - dihydroxynaphthalene - 6 sulphonic acid (2 mols.), and additional R1 components specified are 2 : 5 : 7 -, 1 : 8 : 4 - and 2 : 8 : 6-aminonaphtholsulphonic acids, N-methyl, N-hydroxyethyl-, N-phenyl, N-(p- and m-sulphophenyl)-, N-(p-methoxyphenyl- and N-(41-hydroxy - 31 - carboxyphenyl) - 2 : 5 : 7 - acid, 1 : 8 - aminonaphthol - 3 : 6 - and 2 : 4 - disulphonic acids and 1 : 8 - dihydroxynaphthalene - 3 : 6 - disulphonic acid. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH613939X | 1945-03-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB613939A true GB613939A (en) | 1948-12-07 |
Family
ID=4523609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5014/46A Expired GB613939A (en) | 1945-03-22 | 1946-02-18 | Manufacture of cupriferous disazo-dyestuffs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB613939A (en) |
-
1946
- 1946-02-18 GB GB5014/46A patent/GB613939A/en not_active Expired
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