Global Patent Index - EP 2703553 A1

EP 2703553 A1 20140305 - Process for bleaching using peroxo-polyoxometalates for textiles made from mixtures of cellulosic fibers such as: flax-cotton, hemp-cotton

Title (en)

Process for bleaching using peroxo-polyoxometalates for textiles made from mixtures of cellulosic fibers such as: flax-cotton, hemp-cotton

Title (de)

Verfahren zum Bleichen mithilfe von Peroxo-Polyoxometallaten von Textilien aus Mischungen cellulosischer Fasern wie: Flachs-Baumwolle, Hanf-Baumwolle

Title (fr)

Procédé de blanchiment à l'aide de peroxo-polyoxométalates de textiles fabriqués à partir de mélanges de fibres cellulosiques tels que : lin-coton, chanvre-coton

Publication

EP 2703553 A1 20140305 (EN)

Application

EP 13464006 A 20130402

Priority

RO 201200640 A 20120904

Abstract (en)

According to the invention, the process consists of bleaching textile materials from mixtures of cellulosic fibre, such as: (flax-cotton, hemp-cotton) until achieving a whiteness degree of 70-80%, which is carried out in two stages: in the first stage, the materials are treated in aqueous solution containing peroxo-POM catalysts {(NH 4 ) 8 [Mo 10 O 22 (O 2 ) 12 ]; Na 2 [MoO(O 2 ) 2 (C 2 O 4 )]; MoO(O 2 ) 2 ; WO(O 2 ) 2 } in the presence of ionic surfactant and H 2 O 2 , at the temperature of 70-90° C for 60-90 minutes, while in the second stage the material treated in the first stage is suspended in a solution containing 1,5-7 g NaOH, 0,2-1,3 g Na 2 SiO 3 and 0,8-3,2 g H 2 O 2 , for 1-1.5 hours at the temperature of 70-80°C, after which it is washed with cold water until it reaches neutral pH, and then it is air-dried.

IPC 8 full level

D06L 3/02 (2006.01); C11D 3/39 (2006.01); D06L 4/12 (2017.01); D06L 4/70 (2017.01)

CPC (source: EP)

D06L 4/12 (2016.12); D06L 4/70 (2016.12)

Citation (applicant)

  • RO 122728 B1 20091230 - UNIV AUREL VLAICU DIN ARAD [RO]
  • GEIER J., HOLZFORSCHUNG, vol. 36, 1982, pages 55
  • M.PUSTIANU; M.S.BUCUR: "Finisarea produselor textile", vol. L, 2004, pages: 27
  • M.PUSTIANU; M.S.BUCUR: "Finisarea produselor textile", vol. 1, 2004, pages: 49
  • E. BUCURENCI; N BOITOR: "Calauza finisorului de bumbac, in si cânepä", CENTRUL DE DOCUMENTARE SI PUBLICATII TEHNICE AL MINISTERULUI INDUSTRIEI USOARE, 1973, pages 75 - 77
  • DICKMANN D.H; POPE M.T, CHEM REV., vol. 94, 1994, pages 569 - 584
  • TAMASINI B.; YEGANEH H., REACT.FUNCT,POLYM, vol. 50, 2002, pages 101 - 106
  • ZHOU Z.H.; HOU S.Y.; WAN H.L, J.CHEM.SOC.,DALTON TRANS, 2004, pages 1393 - 1399

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 2703553 A1 20140305; RO 128839 A0 20130930

DOCDB simple family (application)

EP 13464006 A 20130402; RO 201200640 A 20120904