DEHALOGENATION OF ORGANOHALOGEN-CONTAINING COMPOUNDS

Enzymatic dehalogenation of undesirable nitrogen-free organohalogen compounds is carried out by adding a dehalogenase to an aqueous composition comprising a nitrogen-free organohalogen compound and a nitrogen-containing cationic polymer. The enzymatic dehalogenation of the nitrogen-free organohaloge...

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Bibliographische Detailangaben
Hauptverfasser:	BULL, ALAN, HARDMAN, DAVID J, STUBBS, BRIAN M
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BEER BIOCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS THEREOF CULTURE MEDIA ENZYMOLOGY FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE IMPREGNATING OR COATING OF PAPER MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY MICROBIOLOGY MICROORGANISMS OR ENZYMES MUTATION OR GENETIC ENGINEERING ORGANIC MACROMOLECULAR COMPOUNDS PAPER NOT OTHERWISE PROVIDED FOR PAPER-MAKING PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D PROCESSES USING MICROORGANISMS PRODUCTION OF CELLULOSE PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS PULP COMPOSITIONS SPIRITS TEXTILES THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G VINEGAR WINE
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Beschreibung
Zusammenfassung:	Enzymatic dehalogenation of undesirable nitrogen-free organohalogen compounds is carried out by adding a dehalogenase to an aqueous composition comprising a nitrogen-free organohalogen compound and a nitrogen-containing cationic polymer. The enzymatic dehalogenation of the nitrogen-free organohalogen compound is achieved without any substantial effect upon the nitrogen-free organohalogen compound. The dehalogenation method may be carried out via continuous, batch, or semi-continuous processes. The composition is especially useful as a paper wet strengthening formulation, and is useful in commercial papermaking processes. The resulting paper product comprises a residue of a microorganism. Preferably the enzyme is obtained from a biocatalyst, still more preferably from a microorganism. Batch-enrichment of a culture of a dehalogenase-containing microorganism provides a composition capable of substantially eliminating the presence of nitrogen-free organohalogen compounds, which are considered to be pollutants. Cell concentrations of greater than 5 x 10 7 cells/ml are provided.