PROCESSING METHOD OF GOLD PLATING LIQUID

PROBLEM TO BE SOLVED: To provide a processing method for removing an iron ion from gold plating liquid containing the iron ion.SOLUTION: The processing method of the gold plating liquid comprises a step of bringing the gold plating liquid containing the iron ions and citric acid into contact with a...

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Bibliographische Detailangaben
Hauptverfasser:	NANBU NOBUYOSHI, NANBU TADAHIKO, MORITA HIROKAZU
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a processing method for removing an iron ion from gold plating liquid containing the iron ion.SOLUTION: The processing method of the gold plating liquid comprises a step of bringing the gold plating liquid containing the iron ions and citric acid into contact with a chelating agent having a functional group containing phosphorus to remove the iron ions. The phosphorus-containing functional group is preferably a phosphonic acid group or a phosphoric acid group. The gold plating liquid to be processed is preferably electrolytic gold plating liquid.SELECTED DRAWING: None 【課題】鉄イオンを含む金メッキ液から鉄イオンを除去する処理方法を提供する。【解決手段】鉄イオンとクエン酸とを含有する金メッキ液を、リンを含む官能基を有するキレート材と接触させて、鉄イオンを除去する金メッキ液の処理方法。前記リンを含む官能基は、ホスホン酸基またはリン酸基であることが好ましい。また、処理対象となる金メッキ液は、電解金メッキ液であることが好ましい。【選択図】なし