METHOD AND AGENT FOR INHIBITING INCRUSTATIONS IN EVAPORATORS FOR CONCENTRATING BLACK LIQUOR

Described is a method for inhibiting incrustations in evaporators for concentrating black liquor from the sulphite process comprising the addition of a copolymer of acrylic acid, 2acrylamido-2-methylpropane-1-sulfonate and t-butylacrylamide and/or a hydrophobically modified (meth)acrylate polymer in...

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Bibliographische Detailangaben
Hauptverfasser:	SCHUETZ, JURGEN FRIEDRICH, SCHANKULA, HEROLD
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	APPARATUS THEREFOR CHEMISTRY METALLURGY PAPER-MAKING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS SEPARATION TEXTILES TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	Described is a method for inhibiting incrustations in evaporators for concentrating black liquor from the sulphite process comprising the addition of a copolymer of acrylic acid, 2acrylamido-2-methylpropane-1-sulfonate and t-butylacrylamide and/or a hydrophobically modified (meth)acrylate polymer in combination with an anionic surfactant selected from n-alkyl benzene sulfonic acids. This combination exhibits a distinct synergistic effect and inhibits the formation of incrustations considerably. Described is further a corresponding agent comprising these copolymers and an anionic surfactant.