Detergent for selectively permeable film and method of cleaning

• Main Author: HITOTSUYANAGI NAOTO,ORITA NOBUHIRO,KAWAKATSU TAKAHIRO
• Format: Patent
• Language: Chinese; English
• Published: 01.09.2004
• Edition: 7
• Subjects: ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; DETERGENT COMPOSITIONS; DETERGENTS; FATTY ACIDS THEREFROM; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; RECOVERY OF GLYCEROL; RESIN SOAPS; SEPARATION; SOAP OR SOAP-MAKING; TRANSPORTING; USE OF SINGLE SUBSTANCES AS DETERGENTS

本发明提供一种选择性透过膜的洗涤剂和洗涤方法，其对选择性透过膜的洗涤效果好、不会导致选择性透过膜的劣化、对人和环境安全且处理性能优良、能在短时间内高效洗涤透过通量降低的选择性渗透膜，并使其性能恢复。将含有分子量400以下的多元醇，以及必要时还含有有机溶剂的洗涤剂供给膜组件(1)的浓缩液室(3)，使其与选择性透过膜接触而进行洗涤，必要时从水槽(6)或碱液槽(8)将水或碱液供给膜组件(1)的浓缩液室(3)进行洗涤，使选择性透过膜(2)的性能恢复。 A detergent and a method for washing applicable to selectively permeable membranes are proposed, which can attain washing of selectively permeable membranes deteriorated in its membrane performance, such as the flux, in an efficient manner within a brief time at a higher detergent effect without causing deterioration of the selectively permeable membranes and without damaging safety to human and to environment with superior handling aspect. A detergent comprising a polyol having a molecular weight not higher than 400 and, if necessary, an organic solvent is supplied to the concentrate chamber 3 of the module 1 to carry out washing of the selectively permeable membrane 2 by bringing it into contact with the selectively permeable membrane 2 and, on requirement, water or an alkaline solution is further supplied from the water tank 6 or from the alkali storage 8 to the concentrate chamber 3 of the module 1, in order to recover the membrane performance of the selectively permeable membrane 2.