GB887373A - Process for the manufacture of quinacridones from 6:13-dihydroquinacridones - Google Patents

Process for the manufacture of quinacridones from 6:13-dihydroquinacridones

Info

Publication number
GB887373A
GB887373A GB19908/59A GB1990859A GB887373A GB 887373 A GB887373 A GB 887373A GB 19908/59 A GB19908/59 A GB 19908/59A GB 1990859 A GB1990859 A GB 1990859A GB 887373 A GB887373 A GB 887373A
Authority
GB
United Kingdom
Prior art keywords
dihydroquinacridones
quinacridones
oxidising
sulphonic acids
anthraquinone sulphonic
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
GB19908/59A
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.)
BASF Schweiz AG
Original Assignee
Ciba 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 Ciba AG filed Critical Ciba AG
Publication of GB887373A publication Critical patent/GB887373A/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
    • C09B48/00—Quinacridones

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pyridine Compounds (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)

Abstract

The leuco compounds of anthraquinone sulphonic acids are formed when 6 : 13-dihydroquinacridones are oxidised to quinacridones using the anthraquinone sulphonic acids as oxidising agents. The leuco compounds may be reconverted to the anthraquinone sulphonic acids by atmospheric oxygen. Specification 828,053 is referred to.ALSO:Substituted or unsubstituted quinacridones are made by oxidising substituted or unsubstituted 6 : 13-dihydroquinacridones in alkaline solution using an anthraquinone sulphonic acid as oxidising agent. A water-soluble organic solvent may be present. Examples are given. Specification 828,053 is referred to.
GB19908/59A 1958-06-11 1959-06-10 Process for the manufacture of quinacridones from 6:13-dihydroquinacridones Expired GB887373A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH887373X 1958-06-11

Publications (1)

Publication Number Publication Date
GB887373A true GB887373A (en) 1962-01-17

Family

ID=4545380

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19908/59A Expired GB887373A (en) 1958-06-11 1959-06-10 Process for the manufacture of quinacridones from 6:13-dihydroquinacridones

Country Status (1)

Country Link
GB (1) GB887373A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326918A (en) * 1965-10-21 1967-06-20 Du Pont Process for the preparation of beta phase quinacridone
US5093497A (en) * 1988-10-12 1992-03-03 Bayer Aktiengesellschaft Process for the preparation of a substituted or unsubstituted quinacridone
EP0697413A3 (en) * 1994-08-08 1996-03-06 Ciba Geigy Ag

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326918A (en) * 1965-10-21 1967-06-20 Du Pont Process for the preparation of beta phase quinacridone
US5093497A (en) * 1988-10-12 1992-03-03 Bayer Aktiengesellschaft Process for the preparation of a substituted or unsubstituted quinacridone
EP0697413A3 (en) * 1994-08-08 1996-03-06 Ciba Geigy Ag
US5502192A (en) * 1994-08-08 1996-03-26 Ciba-Geigy Corporation Process for the preparation of quinacridones from dihydroquinacridones in an aqueous medium

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