GB351774A - Process for the manufacture of vat dyestuffs of the anthraquinone series - Google Patents
Process for the manufacture of vat dyestuffs of the anthraquinone seriesInfo
- Publication number
- GB351774A GB351774A GB22139/30A GB2213930A GB351774A GB 351774 A GB351774 A GB 351774A GB 22139/30 A GB22139/30 A GB 22139/30A GB 2213930 A GB2213930 A GB 2213930A GB 351774 A GB351774 A GB 351774A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dimercaptan
- mols
- naphthalene
- acid
- chloranthraquinone
- 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
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Anthraquinone dithioxanthones are prepared by condensing phenylene- or naphthylene-di-(1-thioanthraquinone-2-carboxylic acids) each possessing a free o-position to the sulphur in the benzene or naphthalene nucleus with acid condensing agents. Thus phosphorus pentachloride with or without the addition of aluminium chloride, sulphuric acid or acetic anhydride containing a little concentrated sulphuric acid may be used as condensing agents. The products dye orange to brown shades which are faster and clearer than the monothioxanthones prepared according to Specification 15205/11, [Class 2 (iii), Dyes &c.]. The phenylene- or naphthylene - di - (1-thioanthraquinone-2-carboxylic acids) are prepared by reacting two mols. of 1-chloro- or 1-diazoanthraquinone-2-carboxylic acids with one mol. of a dimercaptan of benzene or naphthalene. In examples (1) 1-chloranthraquinone-2-carboxylic acid (two mols.) is condensed with naphthalene-1,6-dimercaptan (one mol.) and the product ring-closed by means of phosphorus pentachloride: (2) 1 - chloranthraquinone - 2 - carboxylic acid (two mols.) is condensed with naphthalene-2,6-dimercaptan (one mol.) and the product ring-closed by means of phosphorus pentachloride: (3) 1-chloranthraquinone-2-carboxylic acid (two mols.) is condensed with naphthalene-2,7-dimercaptan (one mol.) and the product ring-closed by means of phosphorus pentachloride: (4) 1-chloranthraquinone-2-carboxylic acid (two mols.) is condensed with m-phenylene-dimercaptan and the product ring-closed by means of acetic anhydride and sulphuric acid. The Specification as open to inspection under Sect. 91 (3) (a) describes also the acid condensation of derivatives and substitution products of phenylene- or naphthylene-di-(1-thioanthraquinone-2-carboxylic acids); this subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE351774X | 1929-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB351774A true GB351774A (en) | 1931-07-02 |
Family
ID=6270943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22139/30A Expired GB351774A (en) | 1929-07-30 | 1930-07-22 | Process for the manufacture of vat dyestuffs of the anthraquinone series |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB351774A (en) |
-
1930
- 1930-07-22 GB GB22139/30A patent/GB351774A/en not_active Expired
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