GB351774A - Process for the manufacture of vat dyestuffs of the anthraquinone series - Google Patents

Process for the manufacture of vat dyestuffs of the anthraquinone series

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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
Application number
GB22139/30A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Publication of GB351774A publication Critical patent/GB351774A/en
Expired legal-status Critical Current

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  • 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.
GB22139/30A 1929-07-30 1930-07-22 Process for the manufacture of vat dyestuffs of the anthraquinone series Expired GB351774A (en)

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)

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