GB324119A - Process for the manufacture of water soluble compounds of indigoid dyestuffs - Google Patents

Process for the manufacture of water soluble compounds of indigoid dyestuffs

Info

Publication number
GB324119A
GB324119A GB3034128A GB3034128A GB324119A GB 324119 A GB324119 A GB 324119A GB 3034128 A GB3034128 A GB 3034128A GB 3034128 A GB3034128 A GB 3034128A GB 324119 A GB324119 A GB 324119A
Authority
GB
United Kingdom
Prior art keywords
dyestuffs
benzoic acid
sulphochloride
indigoid
pyridine
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
GB3034128A
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
Priority to GB3034128A priority Critical patent/GB324119A/en
Publication of GB324119A publication Critical patent/GB324119A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B7/00—Indigoid dyes

Landscapes

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

Abstract

324,119. Carpmael, A., (I. G. Farbenindustrie Akt.-Ges.). Oct. 19, 1928. Indigoid dyes. - Water-soluble derivatives of indigoid dyestuffs are made by condensing indigoid dyestuffs containing a replaceable hydrogen atom attached to at least one nitrogen atom with a monosulphohalide of benzoic acid. The condensation is advantageously effected in the presence of an organic base. The products appear to be carboxylic amides containing free sulphonic groups, and may be used for dyeing or printing since they are readily converted into the parent dyestuffs on the fibre by the action of saponifying agents particularly alkalies. In examples (1) indigo is heated with benzoic acid m-sulphochloride in dry pyridine, the pyridine is distilled off, and the condensation product salted out with ammonium sulphate; the product is reconverted to indigo by dilute caustic soda at ordinary temperatures, while weaker alkalies, such as sodium carbonate, produce an intermediate compound, probably the monoacyl derivative, and (2) the condensation product from dibromisatin chloride and alpha-naphthol (Specification 7819/09, example A), subsequently brominated, is similarly treated with benzoic acid m-sulphochloride in pyridine. Other indigold dyestuffs, such as 5-bromindigo and 7 : 7<1>-dimethylindigo may be similarly treated, and other monosulphohalides of benzoic acid, such as the p-sulphochloride, may be used.
GB3034128A 1928-10-19 1928-10-19 Process for the manufacture of water soluble compounds of indigoid dyestuffs Expired GB324119A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3034128A GB324119A (en) 1928-10-19 1928-10-19 Process for the manufacture of water soluble compounds of indigoid dyestuffs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3034128A GB324119A (en) 1928-10-19 1928-10-19 Process for the manufacture of water soluble compounds of indigoid dyestuffs

Publications (1)

Publication Number Publication Date
GB324119A true GB324119A (en) 1930-01-20

Family

ID=10306089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3034128A Expired GB324119A (en) 1928-10-19 1928-10-19 Process for the manufacture of water soluble compounds of indigoid dyestuffs

Country Status (1)

Country Link
GB (1) GB324119A (en)

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