D - Textiles – Paper – 06 – F
Patent
D - Textiles, Paper
06
F
D06F 39/00 (2006.01) C02F 1/00 (2006.01) C14C 15/00 (2006.01)
Patent
CA 2277857
A process for washing fat- or dye-soiled materials involving: (a) providing a fat- or dye-soiled material; (b) providing an aqueous detergent-containing liquor; (c) contacting the fat- or dye-soiled material with the aqueous detergent-containing liquor, thus forming a washed material and wash wastewater; (d) providing a source of rinse water; (e) rinsing the washed material with the rinse water, at least once, thus forming rinsed material and rinse wastewater; (f) collecting both the wash and rinse wastewater; (g) chemically pretreating the collected wash and rinse wastewater by contacting it with a compound selected from the group consisting of a demulsifier, an oxidizing agent and mixtures thereof to form waste particles; (h) mechanically removing the waste particles from the collected wash and rinse wastewater by flotation or sedimentation to form prepurified wash and rinse wastewaters; (i) biologically treating the prepurified wash and rinse wastewater by introducing it into a fixed-bed reactor containing activated sludge to form a mixture of treated wastewater and sludge; (j) separating them treated wastewater from the sludge; and (k) recirculating the treated wastewater back into the aqueous detergent- containing liquor, the rinse water, or both.
L'invention concerne un procédé permettant de nettoyer un produit lavable souillé, par exemple des plumes ou du cuir. Le produit lavable est mis en contact avec une lessive aqueuse contenant un détergent et est ensuite rincé au moins une fois à l'eau. Les eaux usées issues du processus de lavage et de rinçage sont collectées, épurées chimiquement, mécaniquement ou biologiquement, puis sont renvoyées dans le processus de lavage. Les eaux usées épurées sont réutilisées aussi bien pour le processus de lavage que pour le processus de rinçage.
Goebel Irmhild
Guhl Walter
Wieser Hans-Josef
Cognis Ip Management Gmbh
Henkel Kommanditgesellschaft Auf Aktien
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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