GB191409975A - Process of Manufacturing Pure Indanthrene-dyestuffs. - Google Patents

Process of Manufacturing Pure Indanthrene-dyestuffs.

Info

Publication number
GB191409975A
GB191409975A GB191409975DA GB191409975A GB 191409975 A GB191409975 A GB 191409975A GB 191409975D A GB191409975D A GB 191409975DA GB 191409975 A GB191409975 A GB 191409975A
Authority
GB
United Kingdom
Prior art keywords
indanthrene
acid
sulphate
separated
water
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 - Lifetime
Application number
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
Farbwerke 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 of GB191409975A publication Critical patent/GB191409975A/en
Application filed by Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C09B5/00—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
    • C09B5/24—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings the heterocyclic rings being only condensed with an anthraquinone nucleus in 1-2 or 2-3 position
    • C09B5/44—Azines of the anthracene series
    • C09B5/46—Para-diazines
    • C09B5/48—Bis-anthraquinonediazines (indanthrone)

Abstract

9975. Farbwerke vorm. Meister, Lucius, & Br³ning. April 22, 1913, [Convention date]. Void. [Published under Section 91 of the Act.] Anthraquinonehydroazines.-Indanthrene dyes are purified by treatment with sulphuric acid of such concentration as to dissolve impurities such as flavanthrene; the indanthrenes either are converted into sulphates or remain as free bases; when sulphates are formed, they are, after separation, dissociated by addition of water. The process may be effected by using sulphuric acid of concentration insufficient to form indanthrene sulphate, such as acid of 60‹ BÚ., the indanthrene being then separated from the solution; or highly concentrated sulphuric acid (80-100 per cent) may be used, the indanthrene sulphate formed being separated and then dissociated by addition of water; or a small quantity of water is added to the reaction mixture so as to give an acid still capable of dissolving the impurities, say an acid of 60‹ BÚ., and the freed indanthrene is separated from the solution. The product may be obtained, according to the conditions, in an amorphous or colloid-like, or finely or coarselycrystalline form. Small quantities of aromatic sulphonic acids or other compounds facilitating the separation of the sulphate in finely subdivided condition, for instance sodium benzylsulphanilate, or ligninosulphonate, may be added. Specifications 18,761/10, 20,324/10, and 18,589/11 are referred to.
GB191409975D 1913-04-22 1914-04-22 Process of Manufacturing Pure Indanthrene-dyestuffs. Expired - Lifetime GB191409975A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE191409975X 1913-04-22

Publications (1)

Publication Number Publication Date
GB191409975A true GB191409975A (en)

Family

ID=32523515

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191409975D Expired - Lifetime GB191409975A (en) 1913-04-22 1914-04-22 Process of Manufacturing Pure Indanthrene-dyestuffs.

Country Status (1)

Country Link
GB (1) GB191409975A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454433A (en) * 1944-03-13 1948-11-23 American Cyanamid Co Acid treatment of pyrene-quinone vat dyestuffs
US2459366A (en) * 1944-03-13 1949-01-18 American Cyanamid Co Acid treatment of pyranthrone vat dyestuffs
US2475821A (en) * 1944-03-13 1949-07-12 American Cyanamid Co Acid treatment of thionaphthene vat dyestuffs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454433A (en) * 1944-03-13 1948-11-23 American Cyanamid Co Acid treatment of pyrene-quinone vat dyestuffs
US2459366A (en) * 1944-03-13 1949-01-18 American Cyanamid Co Acid treatment of pyranthrone vat dyestuffs
US2475821A (en) * 1944-03-13 1949-07-12 American Cyanamid Co Acid treatment of thionaphthene vat dyestuffs

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