GB278112A - Improvements in and relating to the manufacture of dyestuffs and intermediates - Google Patents

Improvements in and relating to the manufacture of dyestuffs and intermediates

Info

Publication number
GB278112A
GB278112A GB1757026A GB1757026A GB278112A GB 278112 A GB278112 A GB 278112A GB 1757026 A GB1757026 A GB 1757026A GB 1757026 A GB1757026 A GB 1757026A GB 278112 A GB278112 A GB 278112A
Authority
GB
United Kingdom
Prior art keywords
oxybenzanthrone
dibenzanthronyl
benzanthrone
dibenzanthrone
sulphuric acid
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
GB1757026A
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.)
ROBERT FRASER THOMSON
Scottish Dyes Ltd
Original Assignee
ROBERT FRASER THOMSON
Scottish Dyes Ltd
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 ROBERT FRASER THOMSON, Scottish Dyes Ltd filed Critical ROBERT FRASER THOMSON
Priority to GB1757026A priority Critical patent/GB278112A/en
Publication of GB278112A publication Critical patent/GB278112A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/64—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by introduction of functional groups containing oxygen only in singly bound form
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

278,112. Thomson, R. F., Thomas, J., and Scottish Dyes, Ltd. July 13, 1926. Oxy- and alkoxybenzanthrone; dibenzanthronyl; dibenzanthrone dyes. - The process of Specification 251,313, according to which a mixture of an oxybenzanthrone and a dibenzanthronyl is obtained by oxidizing benzanthrone in sulphuric acid solution, is modified by effecting the said oxidation at low temperatures such as 0‹ C. The dibenzanthronyl may be converted by alkali fusion into a pure form of dibenzanthrone; the oxybenzanthrone may be alkylated and subsequently subjected to alkali fusion to obtain dialkoxydibenzanthrones. According to an example benzanthrone is treated with ,a solution of manganese dioxide in concentrated sulphuric acid at 0‹ C. or lower temperature; the product is boiled with bisulphite and freed from oxybenzanthrone by caustic alkali and from any residual benzanthrone by means of acetone or benzene.
GB1757026A 1926-07-13 1926-07-13 Improvements in and relating to the manufacture of dyestuffs and intermediates Expired GB278112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1757026A GB278112A (en) 1926-07-13 1926-07-13 Improvements in and relating to the manufacture of dyestuffs and intermediates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1757026A GB278112A (en) 1926-07-13 1926-07-13 Improvements in and relating to the manufacture of dyestuffs and intermediates

Publications (1)

Publication Number Publication Date
GB278112A true GB278112A (en) 1927-10-06

Family

ID=10097491

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1757026A Expired GB278112A (en) 1926-07-13 1926-07-13 Improvements in and relating to the manufacture of dyestuffs and intermediates

Country Status (1)

Country Link
GB (1) GB278112A (en)

Similar Documents

Publication Publication Date Title
GB278112A (en) Improvements in and relating to the manufacture of dyestuffs and intermediates
GB277670A (en) Manufacture of benzanthrone-carboxylic acids
GB181304A (en) The production of a colouring matter of the anthracene series
GB238523A (en) Manufacture of vat dyestuffs of the anthracene series
GB262141A (en) Manufacture of thiazole derivatives of 1:4-naphthoquinone
GB278496A (en) Improvements in and relating to the manufacture of dyestuffs and intermediates
GB494742A (en) Manufacture of hydroxy-trimellitic acid
GB251313A (en) Improvements in and relating to the manufacture of dyestuffs and intermediates
GB416245A (en) Manufacture of 1:4-diaminoanthraquinones
GB439509A (en) Process for the manufacture of 1.4-dihalogen-anthraquinone-2-carboxylic acids
ES190840A3 (en) PROCEDURE FOR THE MANUFACTURE OF CUBA AZULES COLORANTS OF THE SULFINICA SERIES, FROM THE PRODUCTS OBTAINED BY CONDENSATION OF NITROSOPHENOLS AND CARBAZOLE, IN THE PRESENCE OF CONCENTRATED SULFURIC ACID, OR ITS LEATHER-COMPOSED
GB284035A (en) Improvements in and relating to the production of benzanthrones and their derivatives
GB296758A (en) Manufacture of vat-dyestuffs of the anthracene series
GB233734A (en) Improvements in and relating to processes for obtaining high percentage anthracene and carbazole from crude anthracene
GB335232A (en) Improvements in and relating to the manufacture of dyestuff intermediates
GB220216A (en) Improvements in the manufacture and production of vat dyestuffs of the anthraquinoneseries
GB462664A (en) Manufacture of 2:6-dimethylnaphthalene-8-sulphonic acid
GB405706A (en) Improvements in or relating to the manufacture of dibenzanthrone derivatives
GB215782A (en)
GB425841A (en) Improvements in or relating to the manufacture of thioindigo dyestuffs
GB276767A (en) New black and grey vat dyestuffs
GB462337A (en) Manufacture of 2:6-dimethylnapththalene-7-sulphonic acid
GB190112185A (en) The Manufacture and Production of New Colouring Matters of the Antharacene Series.
GB276766A (en) Improvements in the manufacture of benzanthrone derivatives
GB231555A (en) Manufacture of a new vat dyestuff