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公开(公告)号：DE2825296A1
公开(公告)日：1979-12-13
申请号：DE2825296
申请日：1978-06-09
Applicant: BASF AG
Inventor： BERMES RUDOLF DIPL CHEM DR , KEILHAUER HEINZ
Abstract: Organic dye bases are quaternised in absence of solvent and in presence of solid acid acceptor, with subsequent destruction of excess alkylating agent by addn. of ammonia or (NH4)2CO3, and removal of excess basic material by addn. of solid acid and mixing. Pref. 0.5-3(1-1.5) equivs. acid acceptor (pref. MgO) is used per equiv. dye base, which may be of azo, methine or azamethine type. Up to twice, pref. 1.05-1.25 times, the stoichiometric amt. of alkylating agent, esp. dimethyl or diethyl sulphate, is used. The process is applicable and esp. weak, dye bases and the reaction proceeds quickly and quantitatively, the prods. being completely water-soluble.
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公开(公告)号：DE3045377A1
公开(公告)日：1982-08-19
申请号：DE3045377
申请日：1980-12-02
Applicant: BASF AG
Inventor： WEBERNDOERFER VOLKMAR DIPL CHE , BRUNNMUELLER FRITZ DIPL CHEM D , EISERT MANFRED DIPL CHEM DR , BERMES RUDOLF DIPL CHEM DR
Abstract: A process for the preparation of dyes which contain sulfonic acid groups and have a low electrolyte content, wherein an aqueous solution or suspension, which may or may not contain inorganic salts, of the dye containing sulfonic acid groups is (a) mixed with an amount, equivalent to the said dye, of a non-emulsifying, water-insoluble amine of a total of 12 to 40 carbon atoms, which forms, with the said dye, a salt which is sufficiently lipophilic for it to separate spontaneously from the aqueous phase, (b) the pH is brought to
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公开(公告)号：DE2428417A1
公开(公告)日：1976-01-02
申请号：DE2428417
申请日：1974-06-12
Applicant: BASF AG
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