from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Alternative spelling of sulfonation.

from The Century Dictionary and Cyclopedia

  • n. The act of introducing into a compound, bv substitution, the acid radical SO2OH.


Sorry, no etymologies found.


  • When these insoluble azo colours are treated with sulphuric acid they are converted into sulpho acids, undergoing what is called sulphonation, an operation of the greatest (p. 067) importance and value in the preparation of dye-stuffs.

    The Dyeing of Woollen Fabrics

  • If the acids themselves do not yield water-soluble sulphonation products, the alkali salts of the latter may be condensed with formaldehyde, and the resulting products then constitute tanning matters provided their solutions can be neutralised or faintly acidified without the solute being thrown out of solution in insoluble form.

    Synthetic Tannins

  • In addition to phenolic mono - and disulphonic acids (and higher sulphonation compounds), the homologues, cresols, xylenols, and naphthols enter into reaction.

    Synthetic Tannins

  • (CH_3) _2 is sulphonated, and the water-soluble sulphonation product heated with formaldehyde for some time, the product remains soluble in water and precipitates gelatine.

    Synthetic Tannins

  • Complete solution of the substance in sulphuric acid is, generally speaking, a criterion of complete sulphonation.

    Synthetic Tannins

  • A very similar condensation product was obtained by condensing sodium-_p_-hydroxybenzoate with formaldehyde and subsequent sulphonation with sulphuric acid.

    Synthetic Tannins

  • OH. COOH. which at higher temperatures is easily sulphonated with concentrated sulphuric acid; the sulphonation product represents a white solid, which easily dissolves in water forming a clear liquid.

    Synthetic Tannins

  • Of aromatic acids all those which yield water-soluble sulphonation products seem suitable for the industrial production of tanning matters.

    Synthetic Tannins

  • CO. O.C_6H_5 is sulphonated, a product is obtained which is easily soluble in water, but which is identified as a mixture of the sulphonation products of salicylic acid and phenol, the salol being dissociated on sulphonation.

    Synthetic Tannins

  • It makes no difference to the final product whether the condensation is the first step followed by sulphonation and consequent solubilisation of the intermediary insoluble product, or whether, vice versa, the sulphonic acid is subjected to condensation.

    Synthetic Tannins


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