GB189703452A - The Manufacture or Production of Colouring Matters. - Google Patents

The Manufacture or Production of Colouring Matters.

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Publication number
GB189703452A
GB189703452A GB189703452DA GB189703452A GB 189703452 A GB189703452 A GB 189703452A GB 189703452D A GB189703452D A GB 189703452DA GB 189703452 A GB189703452 A GB 189703452A
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GB
United Kingdom
Prior art keywords
leuco
acids
acid
sulphonic
dye
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
Inventor
Henry Edward Newton
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB189703452A publication Critical patent/GB189703452A/en
Expired legal-status Critical Current

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Abstract

3452. Newton, H. E., [Farbenfabriken vorm. F. Bayer & Co.]. Feb. 9. Dyes, artificial.-Disulphonic acids of the malachite-green series, which dye wool from an acid bath greenish-blue shades fast to alkalies, are obtained as follows :-The leuco products obtained by condensing alkylated diamidobenzhydrols, such as tetramethyldiamidobenzhydrol, with m-amidobenzene sulphonic acids, or derivatives thereof not substituted in the position para to the amido group, such as o-toluidine-p-sulphonic acid, o-anisidine- or o-phenetidine-p-sulphonic acid. chlor-m-sulphanilic acid, &c., are converted into the corresponding sulphinic-sulphonic leuco compounds, for example, by the process described in Specification No. 26,139, A.D. 1896. These products are separated by converting them into their calcium and sodium salts, and then oxidized directly by lead dioxide and sulphuric acid or the like to disulphonic carbinol dye-stuffs, which are neutralized and precipitated by common salt. Alternatively, the leuco sulphinicsulphonic acids are oxidized to leuco disulphonic acids by potassium permanganate or the like in alkaline solution, and these products are then further oxidized to form the dye-stuffs.
GB189703452D 1897-02-09 1897-02-09 The Manufacture or Production of Colouring Matters. Expired GB189703452A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB189703452T 1897-02-09

Publications (1)

Publication Number Publication Date
GB189703452A true GB189703452A (en) 1897-12-04

Family

ID=32612496

Family Applications (1)

Application Number Title Priority Date Filing Date
GB189703452D Expired GB189703452A (en) 1897-02-09 1897-02-09 The Manufacture or Production of Colouring Matters.

Country Status (1)

Country Link
GB (1) GB189703452A (en)

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