WATER TREATMENT METHOD AND WATER TREATMENT FLOCCULANT
摘要
There is provided a water treatment method using a water treatment flocculant that suffers from minimal secondary contamination with flocculation residues and contains an alkaline solution of a phenolic resin. A water treatment method involving the addition of a flocculant to water to be treated and subsequent membrane separation treatment. The flocculant contains an alkaline solution of a phenolic resin having a melting point in the range of 130°C to 220°C. The water treatment flocculant is produced by a resole-type second-order reaction in the presence of an alkaline catalyst in which an aldehyde is added to an alkali solution of a novolak phenolic resin. The novolak phenolic resin is produced by a reaction between a phenol and an aldehyde in the presence of an acid catalyst.
申请公布号
EP2465593(A1)
申请公布日期
2012.06.20
申请号
EP20100808161
申请日期
2010.08.05
申请人
KURITA WATER INDUSTRIES LTD.;GUN EI CHEMICAL INDUSTRY CO., LTD.