GB287995A - Improvements in the manufacture of triarylmethane dyes - Google Patents

Improvements in the manufacture of triarylmethane dyes

Info

Publication number
GB287995A
GB287995A GB334027A GB334027A GB287995A GB 287995 A GB287995 A GB 287995A GB 334027 A GB334027 A GB 334027A GB 334027 A GB334027 A GB 334027A GB 287995 A GB287995 A GB 287995A
Authority
GB
United Kingdom
Prior art keywords
naphthalenedisulphonate
acid
manufacture
hydrol
oxidized
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
GB334027A
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.)
THOMAS ARTHUR SIMMONS
Imperial Chemical Industries Ltd
Original Assignee
THOMAS ARTHUR SIMMONS
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 THOMAS ARTHUR SIMMONS, British Dyestuffs Corp Ltd filed Critical THOMAS ARTHUR SIMMONS
Priority to GB334027A priority Critical patent/GB287995A/en
Publication of GB287995A publication Critical patent/GB287995A/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
    • C09B11/10—Amino derivatives of triarylmethanes
    • C09B11/12—Amino derivatives of triarylmethanes without any OH group bound to an aryl nucleus
    • C09B11/16—Preparation from diarylketones or diarylcarbinols, e.g. benzhydrol

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Detergent Compositions (AREA)

Abstract

287,995. British Dyestuffs Corporation, Ltd., and Simmons, T. A. Feb. 5, 1927. Triarylmethane dyes.-In the manufacture of Lissamine green V (Colour Index No. 735) from 4 : 4<1>-tetraethyldiaminobenzhydrol and 2: 7- naphthalenedisulphonic acid, the hydrol is isolated in the form of its, 2 : 7-naphthalenedisulphonate. In an example, 4 : 4-tetraethyldiaminodiphenylmethane is oxidized with lead peroxide in order to form the hydrol. After removing the lead from solution, the 2 : 7-naphthalenedisulphonate is precipitated by adding sodium 2: 7-naphthalenedisulphonate and acidifying with sulphuric acid. To prepare the dyestuff, the naphthalenedisulphonate is washed and dissolved in sulpburic acid. The leuco dyestuff obtained by heating and pouring into water is then oxidized with lead peroxide in the usual manner. In preparing the 2 : 7-naphthalenedisulphonate anv soluble salt of 2: 7-naphthalenedisulphonic acid may be used.
GB334027A 1927-02-05 1927-02-05 Improvements in the manufacture of triarylmethane dyes Expired GB287995A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB334027A GB287995A (en) 1927-02-05 1927-02-05 Improvements in the manufacture of triarylmethane dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB334027A GB287995A (en) 1927-02-05 1927-02-05 Improvements in the manufacture of triarylmethane dyes

Publications (1)

Publication Number Publication Date
GB287995A true GB287995A (en) 1928-04-05

Family

ID=9756463

Family Applications (1)

Application Number Title Priority Date Filing Date
GB334027A Expired GB287995A (en) 1927-02-05 1927-02-05 Improvements in the manufacture of triarylmethane dyes

Country Status (1)

Country Link
GB (1) GB287995A (en)

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