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    • 9. 发明公开
    • TANNING PROCESS WHICH COMPRISES OXIDATIVE LIMING STEP
    • GERBVERFAHREN,ENTHALTEND EINEN OXIDATIVENÄSCHERSCHRITT
    • EP3091058A1
    • 2016-11-09
    • EP16168449.3
    • 2016-05-04
    • DANI S.P.A.
    • MECENERO, Roberto
    • C09D175/04C14C11/00C14C1/06C14C1/04C14C1/08C14C3/08C14C9/02
    • C14C11/006C14C1/04C14C1/06C14C1/08C14C3/08C14C9/02
    • The invention relates to a tanning process which comprises the following step: (a) an oxidative liming in base environment of a hide. The oxidative liming comprises a treatment of the hide with lime. The oxidative liming, i.e. step (a), comprises the following steps wherein the percentages are to be understood as percentages by weight with respect to the weight of the hide: (a1) immunizing the hair of said hide with 0.8 to 1.2%, preferably with about 1% of hydrated lime; (a2) thereafter, adding an unhairing solution of peroxide in a percentage of between 2 and 3% of hydrogen peroxide, at a pH of between 12.0 and 12.5, wherein the pH is preferably adjusted by alkalizing the mixture with caustic soda (NaOH); and (a3) thereafter, neutralizing the bath. The process allows recovering all the components of the liming, in particular also the protein part in the liming bath. The hide obtained with the liming is sulfide-free. The invention also relates to a complete tanning process, from brining up to dressing, which complies with the ISO 15987 standard.
    • 本发明涉及一种鞣制方法,其包括以下步骤:(a)在皮革的基础环境中的氧化性灰泥。 氧化石灰包括用石灰处理皮革。 氧化石灰,即步骤(a),包括以下步骤,其中百分比应被理解为相对于皮重的百分比:(a1)将所述皮的头发免疫0.8-1.2%,优选 约1%的熟石灰; (a2)之后,在12.0至12.5之间的pH下,加入过氧化氢的2%至3%的脱水溶液,其中优选通过用苛性钠(NaOH)将混合物碱化来调节pH; 和(a3)之后,中和浴。 该过程允许回收所有的石灰成分,特别是石灰浴中的蛋白质部分。 用石灰获得的皮是无硫化物。 本发明还涉及一种完整的鞣制过程,从加工到敷料,其符合ISO 15987标准。