GB189922886A - Improvements in the Manufacture of Colouring Matters. - Google Patents
Improvements in the Manufacture of Colouring Matters.Info
- Publication number
- GB189922886A GB189922886A GB189922886DA GB189922886A GB 189922886 A GB189922886 A GB 189922886A GB 189922886D A GB189922886D A GB 189922886DA GB 189922886 A GB189922886 A GB 189922886A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acids
- homologues
- disulphonic
- alphylsulphamidonaphthol
- acid
- 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
- Coloring (AREA)
Abstract
22,886. Lake, H. H., [Chemical Works formerly Sandoz]. Nov. 16. Dyes, artificial; alphylsulphamidonaphthol sulphonic acids.-Relates to new azo dyes which dye wool and silk in an acid bath bright bluish-red to violet . shades, and consist in combining 1 : 8 - alphylsulphamidonaphthol disulphonic acids with the diazo derivatives of an aromatic compound, such as aniline, o- or p-toluidine, m- or p-xylidine, mono- or di-chloraniline or their homologues, pamidoacetanilide, m - or p - nitraniline, or their homologues, o-anisidine, p-phenetidine, m-amido-pcresol ether, aniline sulphonic acids or their homologues, amidobenzoic acids, amidoazobenzene, amidoazotoluene or their sulphonic acids, alpha- or ,3- naphthylamine or mono- or di-sulphonic acids thereof. The bluest products are those derived from p-phenylenediamine and its homologues and obtained from diazotized p-amidoacetanilide or p-nitraniline. The diazo compounds combine only in alkaline solution, except in the case of diazotized nitro- or dichloro-benzenes which combine in acid or alkaline solution. The alphylsulphamidonaphthol disulphonic acids employed are produced by heating 1 : 8-amidonaphthol-3 : 6-, -2 : 4-, or -4: 6-disulphonic acid with an alphylsulphochloride, such as benzene-, o- or p-toluene-, or xylene - sulphochloride, in presence of powdered chalk at about 80‹ C. until a sample ceases to yield a diazo compound. The dialkylsulphamidonaphthol disulphonic acid thus produced is boiled with caustic soda in order to split off the alphylsulpho radicle combined with the hydroxylic oxygen. The alkaline mixture is then neutralized, the lime is precipitated by soda, and the solution is filtered off and used for the production of the azo dyes as above described. The amido group is neutralized by the presence of the alphyl-sulpho radicle, and the products have consequently the properties of naphtholsulphonic acids.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB189922886T | 1899-11-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB189922886A true GB189922886A (en) | 1900-09-08 |
Family
ID=32618148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB189922886D Expired GB189922886A (en) | 1899-11-16 | 1899-11-16 | Improvements in the Manufacture of Colouring Matters. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB189922886A (en) |
-
1899
- 1899-11-16 GB GB189922886D patent/GB189922886A/en not_active Expired
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