发明授权
- 专利标题: Polymeric chelant and coagulant to treat metal-containing wastewater
- 专利标题(中): 聚合螯合剂和凝结剂处理含金属废水
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申请号: US11380090申请日: 2006-04-25
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公开(公告)号: US07722841B2公开(公告)日: 2010-05-25
- 发明人: Baraka Kawawa , Stephen R. Vasconcellos , William Sean Carey , Nicholas R. Blandford
- 申请人: Baraka Kawawa , Stephen R. Vasconcellos , William Sean Carey , Nicholas R. Blandford
- 申请人地址: US NY Schenectady
- 专利权人: General Electric Company
- 当前专利权人: General Electric Company
- 当前专利权人地址: US NY Schenectady
- 代理机构: Duane Morris LLP
- 主分类号: C01G3/00
- IPC分类号: C01G3/00 ; C08G75/14 ; C08H5/02
摘要:
The present invention is directed to the use of a combination of a polymeric chelant and coagulant to treat metal containing wastewater. More particularly, the invention is directed at removing copper from CMP wastewater. The composition includes a combination of (a) a polymeric chelant derived from a polyamine selected from the group consisting of diethylenetriamine (DETA), triethylenetetraamine (TETA), tertraethylenepentaamine (TEPA), poly[vinylamine], and branched or linear poly[ethylenimine] (PEI); and (b) a water soluble or dispersible copolymer of a tannin and a cationic monomer selected from the group consisting of methyl chloride or dimethyl sulfate quaternary salt of dimethyl aminoethyl acrylate, diethylaminoethyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminopropyl methacrylamide, dimethylaminopropyl acrylamide, and diallyl dimethyl ammonium chloride.