Déparementage et blanchiment des fibres cellulosiques,申请号FR19633104905-传众专利搜索

Déparementage et blanchiment des fibres cellulosiques

申请公布号：FR1378086(A)

申请号：FR19633104905

申请日期：1963.07.30

申请公布日期：1964.11.13

申请人：

OFFICE NATIONAL INDUSTRIEL DE L'AZOTE

发明人：LHOSTE PIERRE

分类号：D06L1/14;D06L3/06;D06M13/364

主分类号：D06L1/14

摘要：1,050,712. Bleaching cellulosic fibres. OFFICE NATIONAL INDUSTRIEL DE L'AZOTE, Aug. 4, 1964 [July 30, 1963; June 19, 1964], No. 31158/64. Heading D1P. Unbleached natural cellulosic fibres, e.g. linen and cotton fabrics, are bleached by contacting them with an aqueous solution of pH not below 6.5 of trichlorocyanuric acid, dichlorocyanuric acid or one of its salts, or a mixture of the said acids or salts or both. If the fibres have not been desized they may be given a pre-treatment with an aqueous solution of pH below 6.5 of trichlorocyanuric acid, dichlorocyanuric acid or one of its salts, or a mixture of the said acids or salts or both, the pH there being raised to at least 6.5 by the addition of an alkali, e.g. an alkaline carbonate, bicarbonate or hydroside. If the bleaching is effected at a pH adjusted to 10 or above by the addition of an alkaline carbonate or hydroside undesized fibres may be both bleached and desized. Cyanuric acid may also be added to the bleaching bath. Bleaching may be effected at ambient temperature or at 95-100‹C.