Patent GB-418334-A (GB)
Title: A process of treating materials in the textile, leather and paper industries
IPC: D06M13/256
Filed: 1934-01-30
Abstract: To aqueous baths used for the treatment of materials in the textile, leather and paper industries are added polyvalent metal salts of esters derived from aromatic sulphodicarboxylic acids and alcoholic or phenolic compounds containing more than two carbon atoms.  The cleansing, dispersing and solvent properties of the baths are thereby increased.  In a modification, the baths contain a salt of mineral acid and a monovalent or polyvalent metal salt of the said esters, but in this case the alcoholic or phenolic residues of the esters must not contain a free or substituted carboxyl group.  The polyvalent metal salts may be prepared from the metal oxides, hydroxides or carbonates by treatment with sulphonic acids of the aromatic dicarboxylic acid esters or acid or normal salts of aromatic sulphodicarboxylic acids or sulphonates of the corresponding carboxylic acid anhydrides may be esterified with the alcoholic or phenolic compounds.  Examples of the latter are isopropyl, butyl, amyl, hexyl, octyl, lauryl, cetyl, octadecyl, benzyl and oleyl alcohols, phenol, chlorphenol, cresols, chlorcresols, naphthols, hydrogenated phenols, oxyamines, oxyethers and ketoalcohols. Sulphophthalic, sulphoisophthalic, sulphoterephthalic, chlorsulphophthalic and sulphonaphthalic acids are examples of sulphodicarboxylic acids.  Mineral acid salts mentioned which may be present are: alkali and ammonium halides, suphates and nitrates, magnesium sulphate, calcium and barium chlorides and water soluble nitrates, phosphates and borates.  In examples: (1) 4-sulphophthalic acid anhydride is esterified with amylalcohol and neutralized with lime or aluminium hydroxide; (2) the amyl ester used in example (1) is neutralized with caustic soda, dried and mixed with magnesium sulphate or calcined sodium sulphate; the product yields with benzene and water an emulsion suitable for removing oil spots or cleaning wool stained with pitch; (3) the monosodium salt of 4-sulphophthalic acid anhydride is esterified with methyl-cyclohexanol and the resulting ester salt mixed with magnesium sulphate.ALSO:To aqueous baths used for the treatment of materials in the textile, leather, and paper industries are added polyvalent metal salts of esters derived from aromatic sulpho dicarboxylic acids and alcoholic or phenolic compounds containing more than two carbon atoms.  The wetting, dispersing or solvent properties of the baths are thereby increased.  In a modification, the baths contain a salt of a mineral acid and a monovalent or polyvalent metal salt of the said esters, but in this case the alcoholic or phenolic residues of the esters must not contain a free or substituted carboxyl group.  The polyvalent metal salts may be prepared from the metal oxides, hydroxides or carbonates by treatment with sulphonic acids of the aromatic dicarboxylic acid esters or acid or normal salts of aromatic sulphodicarboxylic acids or sulphonates of the corresponding carboxylic acid anhydrides may be esterified with the alcoholic or phenolic compounds.  Examples of the latter are, isopropyl, butyl, amyl, hexyl, octyl, lauryl, cetyl, octadecyl, benzyl and oleyl alcohols, phenol, chlorphenol, cresols, chloreresols, naphthols, hydrogenated phenols, oxyamines, oxyethers and ketoalcohols. Sulphophthalic, sulphoisophthalic, sulphoterephthalic, chlorsulphophthalic and sulphonaphthalic acids are examples of sulphodicarboxylic acids.  Mineral acid salts mentioned are: alkali and ammonium halides, sulphates and nitrates, magnesium sulphate, calcium and barium chlorides and water soluble nitrates, phosphates and borates.  In examples: (1) 4-sulphophthalic acid anhydride is esterified with amyl alcohol and neutralized with lime; the product enables uniform dyeing of cotton with Direct violet to be effected; by neutralizing with aluminium hydroxide instead of lime a product useful for wetting wool or cotton yarn is obtained; (2) the amyl ester used in example (1) is neutralized with caustic soda, dried and mixed with magnesium sulphate or calcined sodium sulphate; the product yields with benzene and water an emulsion suitable for removing oil spots or cleaning wool stained with pitch; (3) the monosodium salt of 4-sulphophthalic acid anhydride is esterified with methylcyclohexanol and the resulting ester salt mixed with magnesium sulphate; (4) to a calcium hypochlorite bleach for raw cotton is added Glauber's salt and the sodium salt of sulphophthalic acid esterified with crude cresol.