公开(公告)号：US5466297A

公开(公告)日：1995-11-14

申请号：US985703

申请日：1992-12-04

Applicant: Walter H. Goodman ,  Narasimba M. Rao ,  Donald A. Johnson

Inventor： Walter H. Goodman ,  Narasimba M. Rao ,  Donald A. Johnson

IPC: B01J39/04 ,  B01J45/00 ,  C23G1/36 ,  F28G9/00 ,  C23G1/02 ,  C02F1/42

CPC classification number: B01J45/00 ,  B01J39/043 ,  C23G1/36 ,  F28G9/00

Abstract: A method is described for removing ferrometal corrosion products from cooling water systems, which method recycles ferrous/ferric complexing agents and leads to low volume highly concentrated iron wastes for disposal. The method combines, preferably, the use of citric acid or citric acid-tannin complexing agents with erythorbic acid reducing agents to clean corroded surfaces followed by recovery of both complexing and reducing agents for recycle by contacting spent cleaning solution with strong acid cation exchange resins or chelating resins. The resins remove and retain iron species, releasing chelating and reducing agents to resin bed effluents. These are recycled. A concentrated iron waste stream is recovered by regenerating the resin beds with strong acids, preferably HCL, H.sub.2 SO.sub.4, and the like.

Abstract translation: 描述了一种从冷却水系统中去除铁质腐蚀产物的方法，该方法回收了亚铁/铁络合剂并导致低体积高浓度铁废物的处理。 该方法优选将柠檬酸或柠檬酸 - 鞣酸络合剂与异抗坏血酸还原剂一起使用以清洁被腐蚀的表面，然后通过将废清洁溶液与强酸性阳离子交换树脂接触来回收复合和还原剂以进行再循环，或 螯合树脂。 树脂去除并保留铁物质，释放螯合和还原剂到树脂床的流出物。 这些被回收。 通过用强酸，优选HCL，H 2 SO 4等再生树脂床来回收浓缩的废铁。