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    Hydrophobically associating copolymers
    2.
    发明专利
    Hydrophobically associating copolymers 未知

    公开(公告)号：EG26625A

    公开(公告)日：2014-04-09

    申请号：EG2011111936

    申请日：2011-11-16

    Applicant: BASF SE

    Inventor： REICHENBACH-KLINKE ROLAND ,  PFEUFFER THOMAS ,  SCHMIDT KATI ,  OSTROWSKI THOMAS ,  LEYRER REINHOLD J ,  FOGEL YULIA ,  FRIEDRICH STEFAN ,  GAEBERLEIN PETER ,  ORLEANS ANDREA ,  SCHUHBECK MANFRED ,  GUZMAN MARCUS ,  RÖSCH MARKUS ,  LANGLOTZ BJÖRN

    IPC: C08F220/34 ,  C08F220/56 ,  C08F220/58

    Abstract: Water-soluble hydrophobically, associating copolymer comprises (in wt.%): (a) monoethylenically unsaturated hydrophobically associated monomers (0.1-20); and (b) at least one of them different, monoethylenically unsaturated hydrophilic monomers (25-99.9), based on the total amount of all monomers in the copolymer, where at least one of the monomer is a hydrocarbon (I). Water-soluble hydrophobically, associating copolymer comprises (in wt.%): (a) monoethylenically unsaturated hydrophobically associated monomers (0.1-20); and (b) at least one of them different, monoethylenically unsaturated hydrophilic monomer (25-99.9), based on the total amount of all monomers in the copolymer, where at least one of the monomer is a hydrocarbon of formula (H 2C=C(R 1>)-R 4>-O-(-CH 2-CH(R 2>)-O-) k-(-CH 2-CH(R 3>)-O-) i-R 5>) (I). The units -(-CH 2-CH(R 2>)-O-) kand (-CH 2-CH (R 3>)-O-) lare arranged in the block structure in hydrocarbon (I). k : 10-150; l : 5-25; R 1> : H or CH 3; R 2> : H, CH 3or C 2H 5; R 3> : 2C or ether of formula (-CH 2-OR 9); R 9> : 2C; R 4> : single bond or divalent linkage comprising -(C nH 2 n)-[R 4> 1>], -O-(C nH 2 n)-[R 4> 2>] or -C(O)-O-(C nH 2 n-)-[R 4> 3>]; R 4> 1> : -CH 2- (preferred), -CH 2-CH 2-, -CH 2-CH 2-CH 2-; R 4> 2> : -O-CH 2-CH 2-, -O-CH 2-CH 2-CH 2- or preferably -O-CH 2-CH 2-CH 2-CH 2-; R 4> 3> : -C(O)-O-CH 2-CH 2- (preferred), -C(O)O-CH(CH 3)-CH 2-, -C(O)O-CH 2-CH(CH 3)-, -C(O)O-CH 2-CH 2-CH 2-CH 2- or -C(O)O-CH 2-CH 2-CH 2-CH 2-CH 2-CH 2-; n : 1-6; and R 5> : H or 1-30C hydrocarbon. Provided that 50% of R 2>is H.

    PROCESS FOR BLOCKING UNDERGROUND FORMATIONS
    8.
    发明专利
    PROCESS FOR BLOCKING UNDERGROUND FORMATIONS 未知

    公开(公告)号：CA2703043A1

    公开(公告)日：2010-06-18

    申请号：CA2703043

    申请日：2009-11-07

    Applicant: BASF SE

    Inventor： REICHENBACH-KLINKE ROLAND ,  GUZMANN MARCUS ,  PFEUFFER THOMAS ,  HERTH GREGOR ,  FRIEDRICH STEFAN

    IPC: E21B33/13

    Abstract: A process is proposed for blocking underground formations in the extraction of fossil oil and/or gas, a first step involving introducing water-absorbing particles into liquid-bearing and porous rock formations, said particles being water-swellable, crosslinked and water-insoluble polymers, said particles in the water-bearing rock formation finally preventing liquid flow through the rock layers by water absorption. This process is characterized in that the absorbing particles comprise a superabsorbent polymer with anionic and/or cationic properties and a retarded swelling action. This process, which can also be carried out in saline formation waters, is notable in that the swelling of the superabsorbents used begins no earlier than after five minutes and in that the superabsorbents are obtainable by four proposed process variants and any combination thereof. This process, which does not need a carrier liquid, is notable for its simplicity and especially the controllable retardation of the swelling action under the specific conditions of underground rock formations.

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