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    TANNING PROCESS WHICH COMPRISES OXIDATIVE LIMING STEP
    6.
    发明授权
    TANNING PROCESS WHICH COMPRISES OXIDATIVE LIMING STEP 有权

    公开(公告)号：EP3091058B1

    公开(公告)日：2018-11-21

    申请号：EP16168449.3

    申请日：2016-05-04

    申请人： DANI S.P.A.

    发明人： MECENERO, Roberto

    IPC分类号： C09D175/04 ,  C14C11/00 ,  C14C1/06 ,  C14C1/04 ,  C14C1/08 ,  C14C3/08 ,  C14C9/02

    CPC分类号： C14C11/006 ,  C14C1/04 ,  C14C1/06 ,  C14C1/08 ,  C14C3/08 ,  C14C9/02

    摘要： 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.

    A PROCESS AND COMPOSITIONS FOR DEGREASING PELTS
    7.
    发明公开
    A PROCESS AND COMPOSITIONS FOR DEGREASING PELTS 有权
    方法和组合物进行脱脂皮

    公开(公告)号：EP2929060A1

    公开(公告)日：2015-10-14

    申请号：EP13818426.2

    申请日：2013-11-22

    申请人： Colortex S.p.A.

    发明人： GORIA, Enrico ,  CEPPARRONE, Antonuccio

    IPC分类号： C14C1/08 ,  C11D3/20

    CPC分类号： C14C1/08

    摘要： The present invention refers to a novel process for treating pelts comprising degreasing of pelts or of intermediate products in leather manufacture, with novel degreasing agents never used until today in this field, having high degreasing efficacy, a reduced environmental impact and low costs.

    LEDERENTFETTUNGSMITTEL
    8.
    发明授权
    LEDERENTFETTUNGSMITTEL 无效
    皮革脱脂

    公开(公告)号：EP1412539B1

    公开(公告)日：2005-10-05

    申请号：EP02758288.1

    申请日：2002-07-01

    申请人： BASF Aktiengesellschaft

    发明人： LAMALLE, Philippe ,  FÜNGERLINGS, Thomas ,  SCHOLTISSEK, Martin ,  TROPSCH, Jürgen ,  RULAND, Alfred ,  BÖHN, Roland ,  OETTER, Günter ,  HACKMANN, Claus ,  PABST, Gunther

    IPC分类号： C14C1/08 ,  C14C5/00

    CPC分类号： C14C1/08 ,  C14C5/00

    摘要： The invention relates to a degreasing agent for treating skins, fur, limed skins and other intermediate products in leather and fur production, and for treating wool or related protein substances, based on non-ionic surfactants of the alcohol alcoxylate type. Alcohol alcoxylates are used which are obtained by reaction with at least one alcohol ROH with n mols of at least one alkylene oxide per mol of alcohol ROH, wherein R represents an alkyl radical containing between 5 and 30 carbon atoms, and having a main chain which contains between 4 and 29 carbon atoms and is branched in the centre thereof with at least one C1 - C10 alkyl radical; the alkylene oxide comprises between 2 and 6 carbon atoms; and n represents a whole number between 1 and 100. The invention also relates to a method for degreasing skins, fur, limed skins and other intermediate products in leather and fur production, and for treating wool or related protein substances, a degreasing agent according to the present invention being used. The invention further relates to the use of said degreasing agent.

    Leather tanning process
    10.
    发明公开
    Leather tanning process 失效
    Ledergerbverfahren

    公开(公告)号：EP0822263A1

    公开(公告)日：1998-02-04

    申请号：EP97112736.0

    申请日：1997-07-24

    申请人： Seta S.A.-Extrativa Tanino de Acacia

    发明人： Leuck, Carlos Alfredo

    IPC分类号： C14C1/08

    CPC分类号： C14C1/08

    摘要： The present invention refers to a new process meant to chrome and/or vegetable leather tanning.
    The process proposed by the invention comprises the steps of bating, conditioning and chrome and/or vegetable tannage. The conditioning uses hydroxy-butaldehyde which reacts blocking the amines of the collagen and releasing carboxyls. This reaction reduces the isoelectric point to 4.0 - 4.5 making the hide susceptive to the effective chrome tannage, linking the carboxyls, or to tannin, linking through hydrogen bridges.
    Hydroxy-butaldehyde is used in the conditioning, in a proportion of 2.5 - 3.0 % over the weight of the delimed hide, in a concentration of 40 ± 2 %, and with a pH of 4.2 - 4.4, the reaction time being from 3 to 4 hours.

    摘要翻译： 本发明涉及一种用于铬和/或蔬菜皮革鞣制的新方法。 本发明提出的方法包括步骤，调理和铬和/或植物鞣制。 调理使用羟基丁醛，其反应阻断胶原的胺和释放羧基。 该反应将等电点降低至4.0-4.5，使得隐藏对有效的铬鞣革，连接羧基或与单宁键连接的氢键。 羟基 - 丁醛用于调理中，比例为重量的2.5-3.0％，浓度为40 +/- 2％，pH为4.2-4.4，反应时间为 3至4小时。