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GB251140A - Manufacture of trisazo-dyestuffs - Google Patents

Manufacture of trisazo-dyestuffs

Info

Publication number
GB251140A
GB251140A GB1630525A GB1630525A GB251140A GB 251140 A GB251140 A GB 251140A GB 1630525 A GB1630525 A GB 1630525A GB 1630525 A GB1630525 A GB 1630525A GB 251140 A GB251140 A GB 251140A
Authority
GB
United Kingdom
Prior art keywords
acid
coupling
chlor
toluidine
resorcinol
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
GB1630525A
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.)
Hoechst AG
Original Assignee
Hoechst 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
Priority to US756550A priority Critical patent/US1565344A/en
Application filed by Hoechst AG filed Critical Hoechst AG
Priority to GB1630525A priority patent/GB251140A/en
Publication of GB251140A publication Critical patent/GB251140A/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
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/18—Trisazo or higher polyazo dyes
    • C09B33/22—Trisazo dyes of the type A->B->K<-C

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Color Printing (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Coloring (AREA)

Abstract

251,140. Imray, O. Y., (Farbwerke vorm- Meister, Lucius, & Briining). June 24, 1925. Trisazo dyes are obtained by coupling an aromatic hydroxy compound capable of coupling twice on the one hand with a diazotized amine and on the other with a diazotized aminonaphthol sulphonic acid, and then coupling the disazo dye with a diazotized amine.-As amines are specified sulphanilic acid or its substitution products, picramic acid, nitro- or halogen-arylamines which may be sulphonated or not; as double-coupling hydroxy compounds are mentioned resorcinol. alphanaphthol, 2 : 7-dioxynaphthalene and its isomerides; H-acid, K-acid, 2 : 8 : 6-acid, J-acid, and 1 : 8: 4-acid are specified as aminonaphtholsulphonic acids. The products are acid dyestuffs yielding fast brown shades on leather tanned either with chrome or with natural agents. The following dyestuffs are prepared according to examples :-(1) sulphanilic acid or 6-chlor-2- or 3- toluidine - 4 - sulphoacid # resorcinol # 1 : 8: 4-acid # m- or p-nitraniline or m-nitrop-toluidine or 4-chlor-2-anisidine; (2) picramic acid # with resorcinol # H-acid # pnitraniline. 6-Chlor-2-toluidine-4-sulphonic acid is obtained by chlorinating o-nitrotoluene, sulphonating, and reducing.
GB1630525A 1924-12-17 1925-06-24 Manufacture of trisazo-dyestuffs Expired GB251140A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US756550A US1565344A (en) 1924-12-17 1924-12-17 Brown trisazo dyestuffs and process of making same
GB1630525A GB251140A (en) 1925-06-24 1925-06-24 Manufacture of trisazo-dyestuffs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1630525A GB251140A (en) 1925-06-24 1925-06-24 Manufacture of trisazo-dyestuffs

Publications (1)

Publication Number Publication Date
GB251140A true GB251140A (en) 1926-04-29

Family

ID=10074892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1630525A Expired GB251140A (en) 1924-12-17 1925-06-24 Manufacture of trisazo-dyestuffs

Country Status (1)

Country Link
GB (1) GB251140A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4988804A (en) * 1987-11-10 1991-01-29 Ciba-Geigy Corporation Polyazo dyes obtained by successive coupling of H-acid and two further anilinic diazo components on resorcinol or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4988804A (en) * 1987-11-10 1991-01-29 Ciba-Geigy Corporation Polyazo dyes obtained by successive coupling of H-acid and two further anilinic diazo components on resorcinol or the like

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