GB487071A - Improvements in the manufacture and production of vat dye-stuffs - Google Patents
Improvements in the manufacture and production of vat dye-stuffsInfo
- Publication number
- GB487071A GB487071A GB147737A GB147737A GB487071A GB 487071 A GB487071 A GB 487071A GB 147737 A GB147737 A GB 147737A GB 147737 A GB147737 A GB 147737A GB 487071 A GB487071 A GB 487071A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- pyrazino
- hydroxy
- carboxylic
- carboxylic acids
- 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
- C09B57/00—Other synthetic dyes of known constitution
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
Vat dyes are obtained by treating Pz-hydroxy-Pz-arylamino - pyrazino - diarylketone - o - carboxylic acids or their arylamides with agents splitting off water. Agents specified are sulphuric acid, methylsulphuric acid, phosphoric acid, boron fluoride and complex compounds of boron fluoride. In examples: (1) Pz - hydroxy - Pz - p - toluidino - 2.3 - pyrazino - diphenylketone - o - carboxylic acid p-toluidide; (2) Pz - hydroxy - Pz - p - chloranilino - 2.3 - pyrazino - diphenyl ketone o-carboxylic acid p-chloranilide; and (3) Pz-hydroxy - Pz - m - toluidino - 2.3 - pyrazino - diphenyl - ketone - o - carboxylic acid m-toluidide are heated with sulphuric acid to give products which dye cotton yellow-red or red shades; (4) Pz - hydroxy - Pz - p - toluidino - 2.3 - pyrazino - diphenyl - ketone - o - carboxylic acid or its 31.61-dichlor derivative is heated with methylsulphuric acid (red-yellow dyeings on cotton). Pz - hydroxy - Pz - arylaminopyrazino - diarylketone - o - carboxylic acids and their arylamides are obtained by heating o-diaminodiarylketone-o-carboxylic acids with oxalic acid to give the Pz-dihydroxy-pyrazino-diarylketone-o-carboxylic acids, and heating with aromatic amines and condensing agents such as zinc chloride to give the arylamides above referred to, which may be converted to the free acids by heating with sulphuric acid.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB147737A GB487071A (en) | 1937-01-18 | 1937-01-18 | Improvements in the manufacture and production of vat dye-stuffs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB147737A GB487071A (en) | 1937-01-18 | 1937-01-18 | Improvements in the manufacture and production of vat dye-stuffs |
Publications (1)
Publication Number | Publication Date |
---|---|
GB487071A true GB487071A (en) | 1938-06-15 |
Family
ID=9722671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB147737A Expired GB487071A (en) | 1937-01-18 | 1937-01-18 | Improvements in the manufacture and production of vat dye-stuffs |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB487071A (en) |
-
1937
- 1937-01-18 GB GB147737A patent/GB487071A/en not_active Expired
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