GB275220A - Manufacture of azo-dyestuffs - Google Patents

Manufacture of azo-dyestuffs

Info

Publication number
GB275220A
GB275220A GB19493/27A GB1949327A GB275220A GB 275220 A GB275220 A GB 275220A GB 19493/27 A GB19493/27 A GB 19493/27A GB 1949327 A GB1949327 A GB 1949327A GB 275220 A GB275220 A GB 275220A
Authority
GB
United Kingdom
Prior art keywords
acid
chlor
amino
sulphobenzoic
light
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
GB19493/27A
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.)
Novartis AG
Original Assignee
JR Geigy 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 JR Geigy AG filed Critical JR Geigy AG
Publication of GB275220A publication Critical patent/GB275220A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B29/00Monoazo dyes prepared by diazotising and coupling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Abstract

275,220. Geigy Akt.-Ges., J. R. July 29, 1926, [Convention date]. Monoazo dyes; lakes. - Monoazo dyes are obtained by diazotizing an aminosulphobenzoic acid having the sulpho group in the o-position to the amino group and coupling with a usual coupling component. The use as components of 1 : 8- naphthylenediamine-3 : 6-disulphonic acid or of compounds containing a cyanuric nucleus is excepted. In examples, (1) 2-chlor-5-amino-4- sulphobenzoic acid is diazotized and coupled with #-naphthol; the product is a fiery red powder giving a calcium or barium lake of more fiery tint and faster to light than Lake red C, and (2) diazotized 2-chlor-5-amino-4-sulphobenzoic acid is coupled in acid solution with 2 : 8 : 6-aminonaphthol sulphonic acid; the product dyes wool in a sulphuric acid bath vivid bluish-red tints fast to light, the fastness can be increased by after-chroming. By using pyrazolones as coupling components, dyestuffs giving greenish or yellow tints, very fast to light, are obtained. 2-Chlor-4-amino-5-sulphobenzoic acid is also specified as a diazo component. 2-Chlor-5-amino-4-sulphobenzoic acid is made by oxidizing o-chlor-p-toluenesulphonic acid, nitrating the carboxylic acid thus produced, and reducing the product. 2-Chlor-4-amino-5-sulphobenzoic acid is made by sulphonating o-chlor-p-nitrotoluene, oxidizing to produce the carboxylic acid, and then reducing the nitro group.
GB19493/27A 1926-07-29 1927-07-22 Manufacture of azo-dyestuffs Expired GB275220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE275220X 1926-07-29

Publications (1)

Publication Number Publication Date
GB275220A true GB275220A (en) 1928-03-29

Family

ID=6024384

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19493/27A Expired GB275220A (en) 1926-07-29 1927-07-22 Manufacture of azo-dyestuffs

Country Status (1)

Country Link
GB (1) GB275220A (en)

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