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公开(公告)号：DE3887989D1
公开(公告)日：1994-03-31
申请号：DE3887989
申请日：1988-12-09
Applicant: MACDERMID INC
Inventor： KUKANSKIS PETER E , D AMBRISI JOSEPH J , KUZMIK JOHN J
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公开(公告)号：CA2003997C
公开(公告)日：1999-01-05
申请号：CA2003997
申请日：1989-11-27
Applicant: MACDERMID INC
Inventor： D AMBRISI JOSEPH J
Abstract: An electrolytic oxidation process for producing alkali metal permanganate from alkali metal manganate, and particularly for effecting such production to regenerate a permanganate working bath, such as used in desmearing, etch-back or cleaning processes in the manufacture of printed circuits, which has reached a level of decreased working efficiency, wherein an aqueous alkaline solution of manganate in alkali metal hydroxide is electrolytically oxidized using a non-sacrificial anode and a cathode comprised of an alkali-resistant cathode electrode immersed in a concentrated aqueous solution of sodium hydroxide in a container porous to ions which is formed from ion-porous polymeric membrane material.
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Patent Agency Ranking
公开(公告)号：DE68920615D1
公开(公告)日：1995-03-02
申请号：DE68920615
申请日：1989-02-22
Applicant: MACDERMID INC
Inventor： D AMBRISI JOSEPH J
Abstract: A process is described for the electrolytic oxidation of manganese dioxide to an alkali metal permanganate by carrying out the electrolysis in dilute alkali metal hydroxide solution (2) using a non-sacrificial anode (6) and a cathode (10) comprising an alkaliresistant electrode (12) immersed in concentrated alkali metal hydroxide solution (16) in a porous container (18). The process is particularly adapted to the regeneration of alkali metal permanganate from manganese dioxide which has been precipitated during use of a permanganate bath as an etchant in the fabrication of printed circuit boards and like purposes.
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公开(公告)号：CA2003997A1
公开(公告)日：1990-09-27
申请号：CA2003997
申请日：1989-11-27
Applicant: MACDERMID INC
Inventor： D AMBRISI JOSEPH J
Abstract: An electrolytic oxidation process for producing alkali metal permanganate from alkali metal manganate, and particularly for effecting such production to regenerate a permanganate working bath, such as used in desmearing, etch-back or cleaning processes in the manufacture of printed circuits, which has reached a level of decreased working efficiency, wherein an aqueous alkaline soluiton of manganate in alkali metal hydroxide is electrolytically oxidized using a non-sacrificial anode and a cathode compised of an alkali-resistant electrode immersed in a concentrated aqueous solution of sodium hydroxide in a container porous to ions.
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公开(公告)号：DE68920615T2
公开(公告)日：1995-06-22
申请号：DE68920615
申请日：1989-02-22
Applicant: MACDERMID INC
Inventor： D AMBRISI JOSEPH J
Abstract: A process is described for the electrolytic oxidation of manganese dioxide to an alkali metal permanganate by carrying out the electrolysis in dilute alkali metal hydroxide solution (2) using a non-sacrificial anode (6) and a cathode (10) comprising an alkaliresistant electrode (12) immersed in concentrated alkali metal hydroxide solution (16) in a porous container (18). The process is particularly adapted to the regeneration of alkali metal permanganate from manganese dioxide which has been precipitated during use of a permanganate bath as an etchant in the fabrication of printed circuit boards and like purposes.
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公开(公告)号：CA1331578C
公开(公告)日：1994-08-23
申请号：CA590993
申请日：1989-02-14
Applicant: MACDERMID INC
Inventor： D AMBRISI JOSEPH J
Abstract: CONVERSION OF MANGANESE DIOXIDE TO PERMANGANATE A process is described for the electrolytic oxidation of manganese dioxide to an alkali metal permanganate by carrying out the electrolysis in dilute alkali metal hydroxide solution using a non-sacrificial anode and a cathode comprising an alkali-resistant electrode immersed in concentrated alkali metal hydroxide solution in a porous container. The process is particularly adapted to the regeneration of alkali metal permanganate from manganese dioxide which has been precipitated during use of a permanganate bath as an etchant in the fabrication of printed circuit boards and like purposes.
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公开(公告)号：DE3887989T2
公开(公告)日：1994-07-14
申请号：DE3887989
申请日：1988-12-09
Applicant: MACDERMID INC
Inventor： KUKANSKIS PETER E , D AMBRISI JOSEPH J , KUZMIK JOHN J
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