SCALE INHIBITOR

PURPOSE:To prevent the precipitation of scale and to remove the scale adhered to a heat conductive surface, by adding a boiler scale inhibitor containing glycol ether diamine tetraacetic acid or a salt thereof to the aqueous system of a boiler. CONSTITUTION:Glycol ether diamine tetraacetic acid repr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	KANEKO ICHIROU
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE ORHEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICALMETHODS OTHER THAN ELECTROLYSIS COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL DYES HEAT EXCHANGE IN GENERAL HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MECHANICAL ENGINEERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To prevent the precipitation of scale and to remove the scale adhered to a heat conductive surface, by adding a boiler scale inhibitor containing glycol ether diamine tetraacetic acid or a salt thereof to the aqueous system of a boiler. CONSTITUTION:Glycol ether diamine tetraacetic acid represented by formula (wherein M is a hydrogen atom or an alkali metal) or a salt thereof is added to soft water supplied to a boiler in an amount of 1-200mg/l for the purpose of preventing scale formation and in an amount of 10-1,000mg/l for the purpose of removing precipitated scale. When the scale inhibitor represented by the aforementioned formula is used in removing scale, scale may be removed by temporarily stopping the operation of the boiler but max. advantage rather resides in that the scale of the boiler can be removed without stopping the operation of the boiler.