公开(公告)号：EP1458924A1

公开(公告)日：2004-09-22

申请号：EP02782627.0

申请日：2002-12-20

申请人： TEX-A-TEC AG

发明人： MARTE, Walter ,  DOSSENBACH, Otmar ,  ROESSLER, Albert ,  MEYER, Ulrich ,  RYS, Paul

IPC分类号： D06P1/22 ,  D06P1/30 ,  D06P5/20

CPC分类号： D06P1/221 ,  D06P1/22 ,  D06P1/30 ,  D06P5/2016

摘要： The invention relates to a method for electro-catalytical hydrogenation of vat dyes and sulphide dyes in acqueous solutions, and to an apparatus for carrying out said method. The inventive method is suitable for batch operation and continuous operation. It works entirely without any reducing agents and provides substantially salt-free dye concentrations of up to 200 g/l. The dyed threads are characterised by good friction qualities and by a high weaving yield. As far as waste water is concerned, no toxic load occurs and the salt loads are much lower, thereby enabling the waste water to be recycled in a substantially less complex manner in comparison with other conventional dye systems. The invention also relates to an apparatus for carrying out said method.

公开(公告)号：EP1563137A1

公开(公告)日：2005-08-17

申请号：EP03757624.6

申请日：2003-11-05

申请人： TEX-A-TEC AG

发明人： MARTE, Walter ,  ROESSLER, Albert ,  RYS, Paul

IPC分类号： D06P1/22 ,  D06P1/30 ,  D06P5/20 ,  C25B3/04 ,  C25B11/04

CPC分类号： D06P1/30 ,  D06P1/221 ,  D06P5/2016

摘要： The invention relates to a method for the electrochemical reduction of vat or sulphur dyes, by bringing the dye (1) into contact with a modified cathode (2), comprising a support (3) made from an electrically-conducting material with a large surface area on which a redox-active substance (4) is permanently immobilised. Substances with quinoid structures, in particular, an anthraquinoid structure are preferably applied in the above. No toxic contamination and greatly reduced salt loads in the effluent are achieved by means of the above method.