GB343994A - Improvements in the manufacture and production of vat dyestuffs of the n-dihydro-1.2.2.1-anthraquinoneazine series which are fast to chlorine - Google Patents

Improvements in the manufacture and production of vat dyestuffs of the n-dihydro-1.2.2.1-anthraquinoneazine series which are fast to chlorine

Info

Publication number
GB343994A
GB343994A GB3236829A GB3236829A GB343994A GB 343994 A GB343994 A GB 343994A GB 3236829 A GB3236829 A GB 3236829A GB 3236829 A GB3236829 A GB 3236829A GB 343994 A GB343994 A GB 343994A
Authority
GB
United Kingdom
Prior art keywords
sulphuric acid
indanthrone
pure
paraformaldehyde
treated
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
GB3236829A
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 GB3236829A priority Critical patent/GB343994A/en
Publication of GB343994A publication Critical patent/GB343994A/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
    • 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)

Landscapes

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

Abstract

Indanthrone dyes.-Dyestuffs fast to chlorine are obtained by fractional precipitation of the dyes obtainable by the action of formaldehyde or agents supplying the same, such as paraformaldehyde, methylal and glycollic acid, on impure N-dihydro-1 : 2 : 21 : 11-anthraquinoneazine, from their solution in conc. sulphuric acid, by dilution to not less than 70 per cent strength, or by extracting from the said condensation products, components not fast to chlorine by means of dilute sulphuric acid of at least 70 per cent strength. The purification may be effected by adding water or dilute sulphuric acid in the requisite amount to a solution of the condensation product in sulphuric acid. Products equally fast to chlorine are obtained by condensing formaldehyde, or agents supplying it, with pure N-di-hydro-1 : 2 : 21 : 11-anthraquinoneazine obtained according to Specifications 113,489, 184,193, and 320,397, [all in Class 2 (iii), Dyes, &c.]. The dyes may be subsequently purified, or treated with alkalis, oxidizing or halogenating agents and are greenish blue. According to examples, (i) water is added to a solution of the dye obtained by the action of paraformaldehyde on commercial Indanthrone Blue RS, and the precipitated dye separated; (2) pure indanthrone is treated with paraformaldehyde in concentrated sulphuric acid, and diluted; (3) pure indanthrone is treated in concentrates sulphuric acid with a different proportion of paraformaldehyde diluted and the dye separated; thereafter the product is treated with varying proportions of sulphuryl chloride, or with caustic potash, to give purer products of equally good fastness to chlorine; (4) pure indanthrone in concentrated sulphuric acid is treated with formaldehyde solution and worked up as in example 2; (5) pure indanthrone in concentrated sulphuric acid is treated with paraformaldehyde followed by manganese dioxide, to give the azure on separation, and this product may be reduced to the N-dihydroazine, and further, chlorinated as above; (6) a product similar to that of example 4 is obtained by treating pure indanthrone with paraformaldehyde and concentrated sulphuric acid; (7) a product obtained by treating pure indanthrone with glycollic acid in concentrated sulphuric acid is further chlorinated with chlorine; (8) pure indanthrone is treated with a small quantity of paraformaldehyde in concentrated sulphuric acid, to give a slightly different product. Specification 20527/04, [Class 2, Acids and salts, Organic &c.], also is referred to.
GB3236829A 1929-10-24 1929-10-24 Improvements in the manufacture and production of vat dyestuffs of the n-dihydro-1.2.2.1-anthraquinoneazine series which are fast to chlorine Expired GB343994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3236829A GB343994A (en) 1929-10-24 1929-10-24 Improvements in the manufacture and production of vat dyestuffs of the n-dihydro-1.2.2.1-anthraquinoneazine series which are fast to chlorine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3236829A GB343994A (en) 1929-10-24 1929-10-24 Improvements in the manufacture and production of vat dyestuffs of the n-dihydro-1.2.2.1-anthraquinoneazine series which are fast to chlorine

Publications (1)

Publication Number Publication Date
GB343994A true GB343994A (en) 1931-02-24

Family

ID=10337523

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3236829A Expired GB343994A (en) 1929-10-24 1929-10-24 Improvements in the manufacture and production of vat dyestuffs of the n-dihydro-1.2.2.1-anthraquinoneazine series which are fast to chlorine

Country Status (1)

Country Link
GB (1) GB343994A (en)

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