Cellulose ether-based gel-forming composition and methods of...

Details Cellulose ether-based gel-forming composition and methods of... Cellulose ether-based gel-forming composition and methods of...

B - Operations, Transporting

01

J

31/26, 134/53

B01J 13/00 (2006.01) C08K 3/00 (2006.01) E21B 43/22 (2006.01)

Patent

CA 1174937

ABSTRACT OF THE DISCLOSURE The application discloses a gel-forming com- position 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 composition in the secondary production of petroleum.

399198

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