GB251644A - Improved manufacture of acid dyestuffs of the rhodamine series - Google Patents

Improved manufacture of acid dyestuffs of the rhodamine series

Info

Publication number
GB251644A
GB251644A GB11311/26A GB1131126A GB251644A GB 251644 A GB251644 A GB 251644A GB 11311/26 A GB11311/26 A GB 11311/26A GB 1131126 A GB1131126 A GB 1131126A GB 251644 A GB251644 A GB 251644A
Authority
GB
United Kingdom
Prior art keywords
dyes
dyestuff
phthalic anhydride
sulphonation
rhodamine
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
GB11311/26A
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.)
Durand and Huguenin AG
Original Assignee
Durand and Huguenin 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 Durand and Huguenin AG filed Critical Durand and Huguenin AG
Publication of GB251644A publication Critical patent/GB251644A/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
    • C09B11/00—Diaryl- or thriarylmethane dyes
    • C09B11/04—Diaryl- or thriarylmethane dyes derived from triarylmethanes, i.e. central C-atom is substituted by amino, cyano, alkyl
    • C09B11/10—Amino derivatives of triarylmethanes
    • C09B11/24—Phthaleins containing amino groups ; Phthalanes; Fluoranes; Phthalides; Rhodamine dyes; Phthaleins having heterocyclic aryl rings; Lactone or lactame forms of triarylmethane dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

251,644. Soc. Anon. Durand et Huguenin. May 4, 1925, [Convention date]. Phthalein dyes.-Acid dyes of the rhodamine series are obtained by condensing an aryl-maminophenol with phthalic anhydride, or a substitution product thereof, in presence of a sulphonating agent, whereby the formation and sulphonation of the dyestuff takes place in one operation. In examples (1) o-tolyl-m-aminophenol. phthalic anhydride and sulphuric acid mono-hydrate are melted together and maintained at a temperature of 140-170‹ C. until the mass solidifies, when the dyestuff is dissolved in dilute alkali and isolated by salting out or evaporation; it dyes wool in clear bluish-red tints, which are redder than those yielded by the dyestuff obtained by a subsequent sulphonation of the corresponding rhodamine, and (2) xylidylm-aminophenol (from 1 : 3-dimethyl-2-aminobenzene and resorcinol) and phthalic anhydride are melted together, sulphuric acid monohydrate is added gradually to the molten mass, which is then kept at 170‹ C. until it solidifies; the product, isolated in the same manner as in example (1), dyes wool clear red tints, which are more yellowish than those obtained with the body made by subsequent sulphonation. Substituted phthalic anhydrides, such as dichlor- or tetrachlor-phthalic anhydrides, may be used.
GB11311/26A 1925-05-04 1926-04-29 Improved manufacture of acid dyestuffs of the rhodamine series Expired GB251644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE251644X 1925-05-04

Publications (1)

Publication Number Publication Date
GB251644A true GB251644A (en) 1927-07-29

Family

ID=5943951

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11311/26A Expired GB251644A (en) 1925-05-04 1926-04-29 Improved manufacture of acid dyestuffs of the rhodamine series

Country Status (1)

Country Link
GB (1) GB251644A (en)

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