FOERFARANDE FOER FRAMSTAELLNING AV EN MODIFIERAD POLYSACKARID SAMT KOMPOSITIONER INNEHAOLLANDE DENSAMMA

FOERFARANDE FOER FRAMSTAELLNING AV EN MODIFIERAD POLYSACKARID SAMT KOMPOSITIONER INNEHAOLLANDE DENSAMMA

Novel deacetylated polysaccharide biopolymers having improved viscosity/filtrability/injectability, well adopted for the secondary and tertiary recovery of oil deposits, are conveniently prepared by (i) acidifying an aqueous polysaccharide composition, e.g., a carbohydrate fermentation broth, with n...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: PIPON, ROBERT, CROS, PATRICK
Format: Patent
Sprache:fin
Schlagworte:
ADHESIVES
BEER
BIOCHEMISTRY
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
DERIVATIVES THEREOF
DYES
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
ENZYMOLOGY
FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE
FIXED CONSTRUCTIONS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MICROBIOLOGY
MINING
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MUTATION OR GENETIC ENGINEERING
NATURAL RESINS
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
ORGANIC MACROMOLECULAR COMPOUNDS
PAINTS
POLISHES
POLYSACCHARIDES
SPIRITS
THEIR PREPARATION OR CHEMICAL WORKING-UP
VINEGAR
WINE
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Beschreibung
Zusammenfassung:Novel deacetylated polysaccharide biopolymers having improved viscosity/filtrability/injectability, well adopted for the secondary and tertiary recovery of oil deposits, are conveniently prepared by (i) acidifying an aqueous polysaccharide composition, e.g., a carbohydrate fermentation broth, with nitric acid to a pH of from about 2 to 0.1, (ii) heat-treating said acidified composition at a temperature of from about 50 DEG to 100 DEG C. for from about 5 to 60 minutes, and (iii) cooling said heat-treated composition and adjusting the pH thereof to a value of from about 5 to 7.