ES383605A1 - Regeneration of chromic acid etching solutions - Google Patents

Regeneration of chromic acid etching solutions

Info

Publication number
ES383605A1
ES383605A1 ES383605A ES383605A ES383605A1 ES 383605 A1 ES383605 A1 ES 383605A1 ES 383605 A ES383605 A ES 383605A ES 383605 A ES383605 A ES 383605A ES 383605 A1 ES383605 A1 ES 383605A1
Authority
ES
Spain
Prior art keywords
chromic acid
regeneration
acid etching
etching solutions
regenerated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES383605A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MacDermid Inc
Original Assignee
MacDermid Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MacDermid Inc filed Critical MacDermid Inc
Publication of ES383605A1 publication Critical patent/ES383605A1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1617—Purification and regeneration of coating baths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31—Surface property or characteristic of web, sheet or block

Abstract

A spent chromic acid etching solution, which has been used, for example, to etch plastic substrates, is regenerated by adding, with mixing, an alkali metal permanganate, such as potassium permanganate, and separating the resulting sludge which forms. During the regeneration process trivalent chromium in the etchant is oxidized to hexavalent chromium. The regenerated etching solution, thus recovered, is utilized as an etchant per se or it may be reconstituted with added sulfuric acid and/or chromic acid as required.
ES383605A 1969-09-12 1970-09-03 Regeneration of chromic acid etching solutions Expired ES383605A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86154269A 1969-09-12 1969-09-12

Publications (1)

Publication Number Publication Date
ES383605A1 true ES383605A1 (en) 1973-02-16

Family

ID=25336092

Family Applications (1)

Application Number Title Priority Date Filing Date
ES383605A Expired ES383605A1 (en) 1969-09-12 1970-09-03 Regeneration of chromic acid etching solutions

Country Status (7)

Country Link
US (1) US3650859A (en)
BE (1) BE756045A (en)
DE (1) DE2043576A1 (en)
ES (1) ES383605A1 (en)
FR (1) FR2061310A5 (en)
GB (1) GB1305077A (en)
NL (1) NL7013291A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808028A (en) * 1971-08-11 1974-04-30 Western Electric Co Method of improving adhesive properties of a surface comprising a cured epoxy
US3998991A (en) * 1974-03-29 1976-12-21 General Motors Corporation Transparent abrasion-resistant coating for a styrene acrylonitrile copolymer and method
US4073740A (en) * 1975-06-18 1978-02-14 Kollmorgen Technologies Corporation Composition for the activation of resinous bodies for adherent metallization
KR100856873B1 (en) * 2007-01-05 2008-09-04 연세대학교 산학협력단 Catalytic surface activation method for electroless deposition
LT6070B (en) * 2012-12-07 2014-09-25 Atotech Deutschland Gmbh Preparation of plastic surface for chemical metallization process
KR102447849B1 (en) 2014-04-01 2022-09-26 아토테크 도이칠란트 게엠베하 운트 콤파니 카게 Composition and process for metallizing nonconductive plastic surfaces

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890944A (en) * 1956-05-25 1959-06-16 North American Aviation Inc Continuous chemical milling process
US3317330A (en) * 1965-01-05 1967-05-02 Chemclean Corp Method of treating polyethylene and polypropylene plastic surfaces

Also Published As

Publication number Publication date
NL7013291A (en) 1971-03-16
GB1305077A (en) 1973-01-31
FR2061310A5 (en) 1971-06-18
DE2043576A1 (en) 1971-03-25
BE756045A (en) 1971-03-11
US3650859A (en) 1972-03-21

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