GB314593A - Improvements in the manufacture and production of nitrogenous vat dyestuffs - Google Patents

Improvements in the manufacture and production of nitrogenous vat dyestuffs

Info

Publication number
GB314593A
GB314593A GB355528A GB355528A GB314593A GB 314593 A GB314593 A GB 314593A GB 355528 A GB355528 A GB 355528A GB 355528 A GB355528 A GB 355528A GB 314593 A GB314593 A GB 314593A
Authority
GB
United Kingdom
Prior art keywords
nitrobenzene
nitrodibenzanthrone
treated
potassium carbonate
aminodibenzanthrone
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
GB355528A
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 GB355528A priority Critical patent/GB314593A/en
Publication of GB314593A publication Critical patent/GB314593A/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
    • C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
    • C09B3/22—Dibenzanthrones; Isodibenzanthrones
    • C09B3/30—Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Indole Compounds (AREA)

Abstract

314,593. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Feb. 4, 1928. Dibenzanthrone derivatives.-Nitrogenous vat dyes are produced by heating nitrodibenzanthrones or nitroisodibenzanthrones or their derivatives or homologues, or reduction products thereof, with weak alkaline agents, with or without solvents or diluents and (or) metals or metal compounds. In examples, (1) nitrodibenzanthrone, obtained according to Specification 220,212, is treated with potassium acetate and a little copper oxide in nitrobenzene; potassium carbonate or formate or sodium acetate may also be used. (2) Tetrabromnitrodibenzanthrone (obtained by brominating in nitrobenzene, with iron as catalyst, the nitrodibenzanthrone which is prepared by nitrating dibenzanthrone in nitrobenzene and adding sodium bisulphite after nitration) is similarly treated, using potassium carbonate. (3) Nitroisodibenzanthrone (obtained by nitrating isodibenzanthrone in. nitrobenzene) is treated as in the first example. (4) Aminodibenzanthrone, obtained according to Specification 1818/05, is heated with sodium formate or potassium acetate in nitrobenzene. (5) Aminodibenzanthrone, obtained by reducing the nitrodibenzanthrone described in Specification 220,212, is heated in nitrobenzene with potassium carbonate and cupric oxide. (6) Tetrabromaminodibenzanthrone (obtained bv brominating in nitrobenzene, with iron as catalyst, the aminodibenzanthrone prepared by reducing the nitro compound referred to in example 2) is boiled with potassium carbonate in nitrobenzene. (7) Aminoisodibenzanthrone (obtained by reduction of the above-mentioned nitroisodibenzantbrone with hydrosulphite) is treated as in examples 4 to 6. (8) Nitrodibenzanthrone (obtained by nitrating dibenzanthrone in glacial acetic acid) is heated with sodium acetate and copper carbonate. Specification 220,930 also is referred to.
GB355528A 1928-02-04 1928-02-04 Improvements in the manufacture and production of nitrogenous vat dyestuffs Expired GB314593A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB355528A GB314593A (en) 1928-02-04 1928-02-04 Improvements in the manufacture and production of nitrogenous vat dyestuffs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB355528A GB314593A (en) 1928-02-04 1928-02-04 Improvements in the manufacture and production of nitrogenous vat dyestuffs

Publications (1)

Publication Number Publication Date
GB314593A true GB314593A (en) 1929-07-04

Family

ID=9760546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB355528A Expired GB314593A (en) 1928-02-04 1928-02-04 Improvements in the manufacture and production of nitrogenous vat dyestuffs

Country Status (1)

Country Link
GB (1) GB314593A (en)

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