GB205254A - Improved process for the manufacture of dichlor fluorane - Google Patents

Improved process for the manufacture of dichlor fluorane

Info

Publication number
GB205254A
GB205254A GB2083122A GB2083122A GB205254A GB 205254 A GB205254 A GB 205254A GB 2083122 A GB2083122 A GB 2083122A GB 2083122 A GB2083122 A GB 2083122A GB 205254 A GB205254 A GB 205254A
Authority
GB
United Kingdom
Prior art keywords
fluorane
dichlor
manufacture
improved process
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
GB2083122A
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.)
Imperial Chemical Industries Ltd
Original Assignee
British Dyestuffs Corp 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 British Dyestuffs Corp Ltd filed Critical British Dyestuffs Corp Ltd
Priority to GB2083122A priority Critical patent/GB205254A/en
Publication of GB205254A publication Critical patent/GB205254A/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
    • C09B11/00—Diaryl- or thriarylmethane dyes
    • C09B11/04—Diaryl- or thriarylmethane dyes derived from triarylmethanes, i.e. central C-atom is substituted by amino, cyano, alkyl
    • C09B11/06—Hydroxy derivatives of triarylmethanes in which at least one OH group is bound to an aryl nucleus and their ethers or esters
    • C09B11/08—Phthaleins; Phenolphthaleins; Fluorescein

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)

Abstract

Dichlorfluorane is prepared by condensing m-chlorphenol with phthalic anhydride in the presence of concentrated or fuming sulphuric acid, or chlorsulphonic acid. An example of the process is given. m-Brom- or m-iodo-phenol behaves similarly. Specification 9675/04 is referred to.
GB2083122A 1922-07-29 1922-07-29 Improved process for the manufacture of dichlor fluorane Expired GB205254A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2083122A GB205254A (en) 1922-07-29 1922-07-29 Improved process for the manufacture of dichlor fluorane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2083122A GB205254A (en) 1922-07-29 1922-07-29 Improved process for the manufacture of dichlor fluorane

Publications (1)

Publication Number Publication Date
GB205254A true GB205254A (en) 1923-10-18

Family

ID=10152425

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2083122A Expired GB205254A (en) 1922-07-29 1922-07-29 Improved process for the manufacture of dichlor fluorane

Country Status (1)

Country Link
GB (1) GB205254A (en)

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