Lee, Hwa Young 2024-01-20T12:04:15Z 2024-01-20T12:04:15Z 2021-09-05 2013-06-01 0149-6395 https://pubs.kist.re.kr/handle/201004/127983 A method of recovering nickel from spent electroless nickel-plating solutions has been investigated through the electrowinning method, following the precipitation of nickel by adding alkali and then dissolving this nickel precipitate with sulfuric acid. When sufficient caustic soda was added to a spent electroless nickel-plating solution to increase the pH to higher than 13, fine nickel particles, below 4 microns in size, along with nickel hydroxide were formed. After filtering the nickel precipitate, it was dissolved with a sulfuric acid solution of over 2vol%, with which more than 95% of the nickel precipitate could be dissolved. For nickel recovery by electrowinning, the pH of the nickel solution required an adjustment of nearly 2.0. English TAYLOR & FRANCIS INC MEMBRANE PROCESS COMBINED RINSE WATER ELECTRODIALYSIS RECLAMATION COPPER ION Separation and Recovery of Nickel from Spent Electroless Nickel-Plating Solutions with Hydrometallurgical Processes Article 10.1080/01496395.2012.756523 1 SEPARATION SCIENCE AND TECHNOLOGY, v.48, no.11, pp.1602 - 1608 SEPARATION SCIENCE AND TECHNOLOGY 48 11 1602 1608 scie scopus 000321172700002 2-s2.0-84879901043 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article MEMBRANE PROCESS COMBINED RINSE WATER ELECTRODIALYSIS RECLAMATION COPPER ION electroless plating electrowinning nickel precipitation recovery