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PROCESS FOR CONCENTRATING A SOLUTION OF TARA EXTRACT AND APPLYING THE SAME WHEN PROCESSING NATURAL HIDES

机译：处理自然隐藏物时集中浓缩解提取物并应用相同方法的过程

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摘要

The invention relates to a process for concentrating the Tara extract solution, in order to obtain a concentrate, as well as to a process for ecologically processing the bovine hides. According to the invention, the process consists of a succession of stages of pre-filtration and micro-filtration with a membrane of cellulose acetate, followed by a stage of concentration of the obtained permeate, by nano-filtration with a regenerated membrane, made of cellulose, at a pressure of 2...10 bar and by reverse osmosis with a membrane of nitro-cellulose, at a pressure of 5...15 bar. The claimed concentrate comprises 74...75% by weight, tannin, and has a tannin : non-tannin ratio of 3 : 1. The claimed process consists in pretanning, for 90 min, the bovine hides depickled at a pH=5 in a water float, where 3...7% solution of concentrated Tara was added, after which a fixation with formic acid at a pH=3.7 follows for 120 min.

机译：本发明涉及浓缩塔拉提取物溶液以获得浓缩物的方法，以及生态加工牛皮革的方法。根据本发明，该方法包括用乙酸纤维素膜进行的预过滤和微过滤的连续步骤，然后是用再生膜进行纳米过滤对浓缩的渗透物进行浓缩的步骤。纤维素，压力为2 ... 10 bar，并在5 ... 15 bar的压力下通过硝化膜进行反渗透。所要求保护的浓缩物包含按重量计74 ... 75％的单宁，且单宁与非单宁之比为3：1。所要求保护的方法包括将牛皮在pH = 5的条件下预酸化90分钟。在水浮子中，加入3 ... 7％的浓缩塔拉溶液，然后用甲酸在pH = 3.7下固定120分钟。

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公开/公告号RO129533B1

专利类型
公开/公告日2018-07-30

原文格式PDF
申请/专利权人 INSTITUTUL NAŢIONAL DE CERCETARE-DEZVOLTARE PENTRU TEXTILE ŞI PIELĂRIE - SUCURSALA INSTITUTUL DE CERCETARE PIELĂRIE-;PIELOREX S.A.;
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申请/专利号RO20120000784
发明设计人 SIMION DEMETRA;ACSINTE DOREL;POPESCU MARIANA;GAIDAU CARMEN-CORNELIA;
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申请日2012-11-01
分类号B01D61/14;C07H1/08;
国家 RO
入库时间 2022-08-21 12:50:13

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