GB517747A - Manufacture of aminohydrazines - Google Patents

Manufacture of aminohydrazines

Info

Publication number
GB517747A
GB517747A GB23712/38A GB2371238A GB517747A GB 517747 A GB517747 A GB 517747A GB 23712/38 A GB23712/38 A GB 23712/38A GB 2371238 A GB2371238 A GB 2371238A GB 517747 A GB517747 A GB 517747A
Authority
GB
United Kingdom
Prior art keywords
acid
product
aug
parts
nitro
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
GB23712/38A
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.)
BASF Schweiz AG
Original Assignee
Gesellschaft fuer Chemische Industrie in Basel CIBA
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 Gesellschaft fuer Chemische Industrie in Basel CIBA filed Critical Gesellschaft fuer Chemische Industrie in Basel CIBA
Publication of GB517747A publication Critical patent/GB517747A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
    • C01B21/16—Hydrazine; Salts thereof

Abstract

517,747. Aminohydrazlnes. SOC. OF CHEMICAL INDUSTRY IN BASLE. Aug. 11, 1938, No. 23712. 'Convention date, Aug. 14, 1937. Addition to 475,627. [Class 2. (iii)], In a modification of the process of the parent Specification, instead of reducing an aromatic hydrazinesulphonic acid containing at least one nitro group, the product of reaction of less than 2 mols. of a salt of sulphurous ,acid on 1 mol. of nitrodiazo compound is subjected to reduction. In the example 40 parts by weight of 4-nitro-4<1>-aminostilbene-2, 2<1> disulphonic acid are diazotized and treated with 30 parts of a 40 per cent. aqueous solution of sodium bisulphite, and the product reduced by means of iron in the presence of hydrochloric and acetic acids. The product 4-amino-4<1>-hydrazinostilbene-2, 21-disulphonic acid may be further condensed with a #-ketocarboxylic acid derivative to give a pyrazolone derivative.
GB23712/38A 1937-08-14 1938-08-11 Manufacture of aminohydrazines Expired GB517747A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH517747X 1937-08-14

Publications (1)

Publication Number Publication Date
GB517747A true GB517747A (en) 1940-02-07

Family

ID=4517791

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23712/38A Expired GB517747A (en) 1937-08-14 1938-08-11 Manufacture of aminohydrazines

Country Status (1)

Country Link
GB (1) GB517747A (en)

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