GB1290748A - - Google Patents

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Publication number
GB1290748A
GB1290748A GB1290748DA GB1290748A GB 1290748 A GB1290748 A GB 1290748A GB 1290748D A GB1290748D A GB 1290748DA GB 1290748 A GB1290748 A GB 1290748A
Authority
GB
United Kingdom
Prior art keywords
disulphonic acid
diaminodiphenylurea
sodium
acid
potassium salts
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
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 filed Critical
Publication of GB1290748A publication Critical patent/GB1290748A/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
    • C07C309/01—Sulfonic acids
    • C07C309/28—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
    • C07C309/45—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
    • C07C309/51—Sulfonic acids having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton at least one of the nitrogen atoms being part of any of the groups, X being a hetero atom, Y being any atom

Abstract

1290748 Preparation of 4,4<SP>1</SP>- diaminodiphenylurea-2,2<SP>1</SP>-disulphonic acid and its sodium and potassium salts IMPERIAL CHEMICAL INDUSTRIES Ltd 22 May 1970 [11 Feb 1970] 6563/70 Heading C2C 4,4<SP>1</SP> - Diaminodiphenylurea - 2,2<SP>1</SP>- disulphonic acid and its sodium and potassium salts are prepared by subjecting a 4,4<SP>1</SP>-diacylamino-diphenyl urea-2,2<SP>1</SP>-disulphonic acid to hydrolysis and if necessary neutralization in aqueous medium. The intermediate 4,41-diacetylamino-diphenylurea-2,2<SP>1</SP>-disulphonic acid, used in the examples is obtained by the phosgenation of 4-aminoacetanilide-3-sulphonic acid.
GB1290748D 1970-02-11 1970-02-11 Expired GB1290748A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB656370 1970-02-11

Publications (1)

Publication Number Publication Date
GB1290748A true GB1290748A (en) 1972-09-27

Family

ID=9816793

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1290748D Expired GB1290748A (en) 1970-02-11 1970-02-11

Country Status (3)

Country Link
CH (1) CH538455A (en)
DE (1) DE2035641A1 (en)
GB (1) GB1290748A (en)

Also Published As

Publication number Publication date
DE2035641A1 (en) 1971-08-26
CH538455A (en) 1973-06-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee