GB446574A - Manufacture of a thiazine dyestuff - Google Patents
Manufacture of a thiazine dyestuffInfo
- Publication number
- GB446574A GB446574A GB3064034A GB3064034A GB446574A GB 446574 A GB446574 A GB 446574A GB 3064034 A GB3064034 A GB 3064034A GB 3064034 A GB3064034 A GB 3064034A GB 446574 A GB446574 A GB 446574A
- Authority
- GB
- United Kingdom
- Prior art keywords
- base
- acid
- aminodimethylaniline
- toluidine
- monomethyl
- 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
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
A thiazine dye is prepared by oxidizing p-aminodimethylaniline thiosulphonic acid and monomethyl-o-toluidine to the indamine thiosulphonic acid, oxidizing this in the absence of zinc chloride to the thiazine dye, separating the latter in the absence of zinc chloride in the form of its base, and transforming this base to the hydrochloride. The product is particularly suitable for making hectograph inks. In an example, p-aminodimethylaniline thiosulphonic acid is oxidized with monomethyl-o-toluidine by means of sodium bichromate and sulphuric acid, copper sulphate added and temperature raised to 90 DEG C.; the dye-base is precipitated by adding caustic soda and converted to the hydrochloride. Specification 5268/96, [Class 2], is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3064034A GB446574A (en) | 1934-10-25 | 1934-10-25 | Manufacture of a thiazine dyestuff |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3064034A GB446574A (en) | 1934-10-25 | 1934-10-25 | Manufacture of a thiazine dyestuff |
Publications (1)
Publication Number | Publication Date |
---|---|
GB446574A true GB446574A (en) | 1936-04-27 |
Family
ID=10310786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3064034A Expired GB446574A (en) | 1934-10-25 | 1934-10-25 | Manufacture of a thiazine dyestuff |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB446574A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4748800A (en) * | 1984-11-30 | 1988-06-07 | Fuji Pack System Ltd. | Wrapping machine |
-
1934
- 1934-10-25 GB GB3064034A patent/GB446574A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4748800A (en) * | 1984-11-30 | 1988-06-07 | Fuji Pack System Ltd. | Wrapping machine |
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