GB413788A - Manufacture of chromiferous dyestuffs - Google Patents
Manufacture of chromiferous dyestuffsInfo
- Publication number
- GB413788A GB413788A GB5181/33A GB518133A GB413788A GB 413788 A GB413788 A GB 413788A GB 5181/33 A GB5181/33 A GB 5181/33A GB 518133 A GB518133 A GB 518133A GB 413788 A GB413788 A GB 413788A
- Authority
- GB
- United Kingdom
- Prior art keywords
- caustic soda
- dyestuff
- chromium
- boiled
- naphthol
- 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
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/01—Complex metal compounds of azo dyes characterised by the method of metallisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
Chromium compounds of the azo dyestuffs o-oxyaminonaphthalene sulphonic acid --> a naphthol are made by treating the o-oxyazo dyestuff in the usual manner, in neutral or acid medium, with an agent yielding chromium then rendering the reaction mixture alkaline and completing the chroming in the alkaline reaction mixture. They give fast even blue to black shades on materials of all kinds, including regenerated celluloses, cellulose esters and ethers and lacquers. In examples: (1) the dyestuff 1 - amino - 2 - naphthol - 4 - sulphonic acid --> b -naphthol is boiled with chromium fluoride and sodium formate for 5 hours and for another 2 hours after addition of sugar and caustic potash; (2) basic chromium sulphate is used as in (1); (3) the dyestuff in (1) is boiled with chromium acetate and then with sugar and caustic potash; (4) the same dyestuff is boiled with chromium formate and sodium acetate and then with sugar and caustic soda; or (5) with chromium formate and then with sugar and caustic potash. Examples of the dyeing process are also given. Specifications 364,148 and 408,497 are referred to. The Specification as open to inspection under Sect. 91 comprises also the following examples: (6) the dyestuff of (1) is dissolved with caustic soda and sugar, boiled with Cr2O3, formic acid and oxalic acid and finally with caustic soda; (7) the same dyestuff is dissolved in caustic soda, boiled with a solution of Cr2O3 in chloracetic acid and afterwards with caustic soda and sugar; (8) the same dyestuff is refluxed with caustic soda and chromium formate and finally with caustic soda and sugar; (9) a solution of Cr2O3 in oxalic and formic acids is used as in (8); (10) the dyestuff 1-amino-2-naphthol-4-sulphonic acid --> a -naphthol is dissolved in caustic soda, refluxed with chromium formate and then with caustic soda; (11) the dyestuff in (1) is boiled with chromium formate and then with caustic soda; (12) the dyestuff from nitrated 1-diazo-2-naphthol-4-sulphonic acid and b -naphthol is suspended in water and caustic soda, boiled with sodium formate and chromium formate and then with caustic soda; (13)--(14) the dyestuff of (12) is boiled with aqueous chromium fluoride with or without glass powder and then with caustic soda. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH413788X | 1932-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB413788A true GB413788A (en) | 1934-07-26 |
Family
ID=4514503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5181/33A Expired GB413788A (en) | 1932-02-20 | 1933-02-20 | Manufacture of chromiferous dyestuffs |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB413788A (en) |
-
1933
- 1933-02-20 GB GB5181/33A patent/GB413788A/en not_active Expired
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