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    Methods for inhibition of scale in high brine environments
    3.
    发明授权
    Methods for inhibition of scale in high brine environments 失效
    在高盐水环境中抑制水垢的方法

    公开(公告)号：US5112496A

    公开(公告)日：1992-05-12

    申请号：US664900

    申请日：1991-03-05

    申请人： Balram Dhawan ,  Derek Redmore ,  John L. Przybylinski

    发明人： Balram Dhawan ,  Derek Redmore ,  John L. Przybylinski

    IPC分类号： C02F5/14 ,  C07F9/38

    CPC分类号： C02F5/14 ,  C07F9/3808

    摘要： A method for inhibiting oilfield scale formation including calcite in a high brine environment comprises introducing an effective amount of a scale inhibiting composition to a high brine environment susceptible to calcite scale formation. The environment has a total dissolved solids content of at least about 150 g/l, and the scale inhibiting composition comprises an aminomethylene posphonate of the formula ##STR1## wherein x is 2 or 3, each Z is independently selected from among H and CH.sub.3, and R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently selected from among hydrogen and --CH.sub.2 PO.sub.3 M.sub.2 wherein the M's are independently selected from among the hydrogen and cations associated with Lewis bases, such that at least about 80% of the R.sup.1, R.sup.2, R.sup.3, and R.sup.4 in the composition is --CH.sub.2 PO.sub.3 M.sub.2.

    摘要翻译： 一种在高盐水环境中抑制含有方解石的油田规模化方法包括将有效量的防垢组合物引入易受方解石垢形成的高盐水环境中。 环境具有至少约150g / l的总溶解固体含量，并且防垢组合物包含式“IMAGE”的氨基亚甲基磷酸酯，其中x为2或3，每个Z独立地选自H和CH 3， 并且R 1，R 2，R 3和R 4独立地选自氢和-CH 2 PO 3 M 2，其中M独立地选自氢和与路易斯碱相关的阳离子，使得至少约80％的R 1，R 2，R 3， 组合物中的R 4为-CH 2 PO 3 M 2。

    Methods for inhibition of scale in high brine environments
    4.
    发明授权
    Methods for inhibition of scale in high brine environments 失效
    在高盐水环境中抑制水垢的方法

    公开(公告)号：US4931189A

    公开(公告)日：1990-06-05

    申请号：US368699

    申请日：1989-06-15

    申请人： Balram Dhawan ,  Derek Redmore ,  John L. Przybylinski

    发明人： Balram Dhawan ,  Derek Redmore ,  John L. Przybylinski

    IPC分类号： C02F5/14 ,  C07F9/38

    CPC分类号： C02F5/14 ,  C07F9/3808

    摘要： A method for preparation of an aminomethylene phosphonate useful as a scale inhibitor in high brine environments. The method comprises phosphonomethylating an amine of the formula ##STR1## wherein x is an integer from 1 to 6 and the Z's are selected from the group consisting of hydrogen and --CH.sub.3, to produce an aminomethylene phosphonate of the formula ##STR2## wherein x and the Z's are defined as above and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are indepenedently selected from the group consisting of hydrogen and --CH.sub.2 PO.sub.3 H.sub.2, such that at least about 80% of the R.sup.1, R.sup.2, R.sup.3 and R.sup.4 in a mixture of the aminomethylene phosphonate is --CH.sub.2 PO.sub.3 H.sub.2. Related methods and compositions are also disclosed.

    摘要翻译： 一种在高盐水环境中用作阻垢剂的氨基亚甲基膦酸酯的制备方法。 该方法包括使式IMAMA的胺膦酰甲基化，其中x是1至6的整数，Z选自氢和-CH 3，以产生下式的氨基亚甲基膦酸酯其中x和 Z的定义如上，R 1，R 2，R 3和R 4独立地选自氢和-CH 2 PO 3 H 2，使得至少约80％的氨基亚甲基膦酸酯的混合物中的R 1，R 2，R 3和R 4 是-CH 2 PO 3 H 2。 还公开了相关方法和组合物。

    Method for inhibition of scale formation
    5.
    发明授权
    Method for inhibition of scale formation 失效
    抑制氧化皮形成的方法

    公开(公告)号：US4857205A

    公开(公告)日：1989-08-15

    申请号：US158830

    申请日：1988-02-22

    申请人： Derek Redmore ,  Balram Dhawan ,  John L. Przybylinski

    发明人： Derek Redmore ,  Balram Dhawan ,  John L. Przybylinski

    IPC分类号： C02F5/14 ,  C08G16/02

    CPC分类号： C02F5/14 ,  C08G16/0243

    摘要： A method for inhibition of scale formation using a composition comprising an N-phosphonomethylated amino-2-hydroxypropylene polymer having a molecular weight of between about 300 and about 5000 and having the structural formula ##STR1## wherein (i) R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are independently selected from the group consisting of hydrogen, phosphonomethyl radical corresponding to the formula --CH.sub.2 PO(OH).sub.2, and water treating acceptable salts of such phosphonomethyl radical, with the proviso that the percentage of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 being hydrogen does not exceed about 30; (ii) R is a divalent radical selected from the group consisting of (a) unsubstituted alkylene groups having at least about 2 and at most about 12 carbon atoms, (b) substituted alkylene groups having at least about 2 and at most about 12 carbon atoms wherein at least one hydrogen of the alkylene group is substituted with a radical selected from the group consisting of methyl, ethyl, propyl, butyl, methyl ammonium, ethyl ammonium and ammonium groups, and the other hydrogens of the substituted alkylene group are unsubstituted, (c) cycloalkylene groups having at least 3 and at most about 12 carbon atoms, and (d) --R'--N--R"-- wherein R.sub.7 is defined as R.sub.1, R.sub.2 R.sub.3, R.sub.4, R.sub.5 and R.sub.6 above, with the proviso that the percentage of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 being hydrogen not exceed about 30, and R' and R" are independently selected from the group consisting of such unsubstituted alkylene groups, and such cycoalkylene groups; and (iii) n is from about 1 to about 25 is disclosed.