Patent GB-208563-A (GB)
Title: Process for the treatment of animal fibres
IPC: D06P1/62
Filed: 1923-12-18
Abstract: In the treatment of animal fibres with alkaline or acid substances, such as are used in the washing, fulling, dyeing, liming of skins, slackening, deadening, and cleansing of hides and the working of hides with lime-water, in carbonizing, oxidizing processes, in bleaching, opening or willowing rags, causticating, vatting or other dyeing processes, the materials are protected by the use of tanning materials or their products of conversion or similar substances.  As examples are mentioned, natural vegetable tanning materials such as quebracho and myrobalan extracts, organic tanning bodies such as the condensation products of formaldehyde with aromatic sulphoacids, neradols, ordovale and other tanning condensation products containing aromatic residues, aliphatic and hydroaromatic tanning bodies and the like, the conversion products of vegetable tanning materials such as phlobaphenes produced by the action of heat or oxygen from the air, the acids of numerous vegetable tanning materials, also the humus substances or geins which are closely related chemically to the phlobaphenes.  The discharged waste liquids from tanneries can also be used.  Examples are given of the application of the invention to a number of different processes and in these peat humus or coal humus dissolved in alkali, valonia tanning material, tanning substances obtained by the sulphonation of wool grease, and the products of chlorination of humin substances, are given as further examples.  The Specification as open to inspection under Sect. 91 (3) (a) includes also the treatment of vegetable fibres.  This subject-matter does not appear in the Specification as accepted.ALSO:In the treatment of animal fibres with alkaline or acid substances, such as are used in the washing, fulling, dyeing, liming of skins, slackening, deadening, and cleansing of hides and the working of hides with lime-water, in carbonizing oxidizing processes, in bleaching, opening or willowing rags, causticating, vatting, or other dyeing processes, the materials are protected by the use of tanning materials or their products of conversion or similar substances.  As examples are mentioned, natural vegetable tanning materials such as quebracho and myrobalan extracts, organic tanning bodies such as the condensation products of formaldehyde with aromatic sulpho-acids, neradols, ordovale, and other tanning condensation products containing aromatic residues, aliphatic and hydro-aromatic tanning bodies and the like, the conversion products of vegetable tanning materials such as phlobaphenes produced by the action of heat or oxygen from the air, the acids of numerous vegetable tanning materials, also the humus substances or geins which are closely related chemically to the phlobaphenes.  The discharged waste liquids from tanneries can also be used.  Examples are given of the application of the invention to the dyeing of wool with vat and sulphur dyes in presence of exhausted tannic lye and to the chroming of wool in the presence of valonia tanning material.  The Specification as open to inspection under Sect. 91 (3) (a) includes also the treatment of vegetable fibres.  An example shows the development of aniline black in presence of quebracho.  This subject-matter does not appear in the Specification as accepted.