GB189711997A - Manufacture of Substantive Colouring Matters. - Google Patents
Manufacture of Substantive Colouring Matters.Info
- Publication number
- GB189711997A GB189711997A GB189711997DA GB189711997A GB 189711997 A GB189711997 A GB 189711997A GB 189711997D A GB189711997D A GB 189711997DA GB 189711997 A GB189711997 A GB 189711997A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dye
- salt
- azo
- nitrated
- dyes
- 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
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Abstract
11,997. Imray, J., [Soc. Anonyme des MatiÞres Colorantes et Produits Chimiques de St. Denis]. May 14. Dyes, artificial. - Relates to improvements in the processes described in Specification No. 5736, A.D. 1890. A nitrated azo dye, such as that produced by diazotizing p-nitraniline and combining the diazo compound with naphthol disulphonic acid (R-salt), is reduced to the corresponding amidoazo dye, and this is then condensed with two molecular proportions of the nitrated azo dye by heating the mixture with caustic soda at 75‹-85‹ C. The product is precipitated by common salt, and dyes unmordanted cotton pure blue. The mother liquor contains an amido compound which is diazotized and combined with R-salt to produce a violet-blue dye. If R-salt in the foregoing first example is replaced by a-naphthol-a-sulphonic acid, a violet dye results. Mixed azo dyes are obtained by using different components in the nitrated azo and amidoazo constituents.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB189711997T | 1897-05-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB189711997A true GB189711997A (en) | 1898-04-16 |
Family
ID=32613037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB189711997D Expired GB189711997A (en) | 1897-05-14 | 1897-05-14 | Manufacture of Substantive Colouring Matters. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB189711997A (en) |
-
1897
- 1897-05-14 GB GB189711997D patent/GB189711997A/en not_active Expired
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