METHOD OF TREATING NICKELAINING ETCHING WASTE FLUID
A method of regenerating an etching waste fluid, includes the steps of (a) dissolving HC l gas in an etching waste fluid at a temperature falling within a range of 20 DEG C to 50 DEG C and crystallizing NiC l 2 and FeC l 2 crystals, the etching waste fluid containing NiC l 2, FeC l 3, and FeC l 2 an...
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| creator | KURIHARA, TOSHIAKI AKIYOSHI, EIICHI HIRABAYASHI, TERUHIKO MAEGAWA, RYOICHI IMAGARE, YOSHIYUKI |
| description | A method of regenerating an etching waste fluid, includes the steps of (a) dissolving HC l gas in an etching waste fluid at a temperature falling within a range of 20 DEG C to 50 DEG C and crystallizing NiC l 2 and FeC l 2 crystals, the etching waste fluid containing NiC l 2, FeC l 3, and FeC l 2 and being obtained by etching Ni or an Ni alloy with an etching solution consisting of an aqueous solution containing FeC l 3, (b) distilling a mother liquor at the atmospheric pressure upon crystallization to reduce the HC l concentration in the mother liquor, and (c) distilling, at a reduced pressure, a condensate obtained upon distillation at the atmospheric pressure to further reduce the HC l concentration, thereby obtaining an aqueous solution containing FeC l 3, or bringing the condensate obtained by distillation at the atmospheric pressure into contact with an iron oxide to cause HC l in the condensate to react with the iron oxide to further reduce the HC l concentration in the condensate, thereby obtaining the aqueous solution containing FeC l 3. |
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AKIYOSHI, EIICHI ; HIRABAYASHI, TERUHIKO ; MAEGAWA, RYOICHI ; IMAGARE, YOSHIYUKI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_KR940009676BB13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; kor</language><creationdate>1994</creationdate><topic>CHEMICAL SURFACE TREATMENT</topic><topic>CHEMISTRY</topic><topic>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</topic><topic>COATING MATERIAL WITH METALLIC MATERIAL</topic><topic>COATING METALLIC MATERIAL</topic><topic>COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F</topic><topic>DIFFUSION TREATMENT OF METALLIC MATERIAL</topic><topic>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</topic><topic>INORGANIC CHEMISTRY</topic><topic>METALLURGY</topic><topic>MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25</topic><topic>NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE</topic><toplevel>online_resources</toplevel><creatorcontrib>KURIHARA, TOSHIAKI</creatorcontrib><creatorcontrib>AKIYOSHI, EIICHI</creatorcontrib><creatorcontrib>HIRABAYASHI, TERUHIKO</creatorcontrib><creatorcontrib>MAEGAWA, RYOICHI</creatorcontrib><creatorcontrib>IMAGARE, YOSHIYUKI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KURIHARA, TOSHIAKI</au><au>AKIYOSHI, EIICHI</au><au>HIRABAYASHI, TERUHIKO</au><au>MAEGAWA, RYOICHI</au><au>IMAGARE, YOSHIYUKI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>METHOD OF TREATING NICKELAINING ETCHING WASTE FLUID</title><date>1994-10-15</date><risdate>1994</risdate><abstract>A method of regenerating an etching waste fluid, includes the steps of (a) dissolving HC l gas in an etching waste fluid at a temperature falling within a range of 20 DEG C to 50 DEG C and crystallizing NiC l 2 and FeC l 2 crystals, the etching waste fluid containing NiC l 2, FeC l 3, and FeC l 2 and being obtained by etching Ni or an Ni alloy with an etching solution consisting of an aqueous solution containing FeC l 3, (b) distilling a mother liquor at the atmospheric pressure upon crystallization to reduce the HC l concentration in the mother liquor, and (c) distilling, at a reduced pressure, a condensate obtained upon distillation at the atmospheric pressure to further reduce the HC l concentration, thereby obtaining an aqueous solution containing FeC l 3, or bringing the condensate obtained by distillation at the atmospheric pressure into contact with an iron oxide to cause HC l in the condensate to react with the iron oxide to further reduce the HC l concentration in the condensate, thereby obtaining the aqueous solution containing FeC l 3.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INORGANIC CHEMISTRY METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE |
| title | METHOD OF TREATING NICKELAINING ETCHING WASTE FLUID |
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