GEL-FORMING COMPOSITION BASED ON A CELLULOSE ETHER, PROCESS FOR PREPARING A GEL, PROCESS FOR THE REVERSIBLE DESTRUCTION OF THIS GEL AND ITS USE IN SECONDARY OIL RECUPERATION

The application discloses a gel-forming composition based on (a) water, (b) a water-soluble cellulose mixed ether having at least one nonionic substituent from the group comprising hydroxyalkyl and alkyl and at least one anionic phosphorus-containing substituent, and (c) a salt containing a cation w...

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Bibliographische Detailangaben
Hauptverfasser:	HOLST, ARNO, BRANDT, LOTHAR
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS METALLURGY MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	The application discloses a gel-forming composition based on (a) water, (b) a water-soluble cellulose mixed ether having at least one nonionic substituent from the group comprising hydroxyalkyl and alkyl and at least one anionic phosphorus-containing substituent, and (c) a salt containing a cation which is at least divalent. The phosphorus-containing substituent is a phosphonoalkyl group or a p-alkylphosphinoalkyl group. The application also relates to a process for the preparation of a gel from this composition, to the reversible reversing of the gel by the addition of an agent which complexes the cation, e.g. in the case of Al3+ ions, Fe3+ ions, Zr4+ ions or ZrO2+ ions, by means of an amount of fluoride ions, and to the use of this gel-forming compostion in the secondary production of petroleum.