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公开(公告)号：US5069286A
公开(公告)日：1991-12-03
申请号：US516177
申请日：1990-04-30
摘要： This invention relates to a method for stabilizing and maintaining water wells penetrating a subterranean formation for the production of water which comprises adding to the wells at least one anionic polymeric sequesterant derived from a carboxylic acid and then subsequently treating the well water with a small but effective amount of at least one biocide.
摘要翻译： 本发明涉及一种用于稳定和保持穿透地下地层以产生水的水井的方法，该方法包括向井中加入至少一种衍生自羧酸的阴离子聚合物螯合剂，然后以小的但有效的方式处理井水 至少一种杀生物剂的量。
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公开(公告)号：US4913823A
公开(公告)日：1990-04-03
申请号：US258034
申请日：1988-10-14
IPC分类号： C02F5/14
CPC分类号： C02F5/14
摘要： This invention relates to a process of dissolving and removing silicate scale and particularly magnesium silicate scale and sludge from various aqueous systems, particularly boiler water and desalination systems by adding to the water effective amounts of at least one water-soluble phosphinocarboxylic acid. These polyphosphinocarboxylic acids and the salts thereof are added to the water in the aqueous system in amounts ranging up to about 50 thousand parts by weight per million and preferably in amounts ranging up to about 2000 parts by weight per million parts by weight of water either alone or in combination with at least one organic dispersant selected from the group consisting of nonionic and anionic dispersants.
摘要翻译： 本发明涉及通过向水中加入有效量的至少一种水溶性膦酰基羧酸而溶解和除去各种水性体系，特别是锅炉水和脱盐系统的硅酸盐垢，特别是硅酸镁垢和污泥的方法。 将这些聚磷酸羧酸及其盐加入水性体系中的水中，其用量范围可达到每百万份约5万份（重量），优选以每百万重量份水单独约2000重量份 或与至少一种选自非离子和阴离子分散剂的有机分散剂组合。
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公开(公告)号：US4997571A
公开(公告)日：1991-03-05
申请号：US461174
申请日：1990-01-05
摘要： A method of treating and removing volatile organic contaminants from ground water by treating the water with effective amounts of a water-soluble polymeric sequesterant comprising polymers derived from acrylic acid or organic acid, followed by the addition of a biocide, e.g., chlorine, and then subsequently passing the treated water through a packed column or air stripper wherein the volatile organic contaminants are removed by passing air in a counter-direction to the flow of water at temperatures ranging from about 40.degree. to about 200.degree. F.
摘要翻译： 通过用有效量的水溶性聚合物螯合剂处理来自地下水的挥发性有机污染物的方法，所述水溶性聚合物螯合剂包含衍生自丙烯酸或有机酸的聚合物，然后加入杀生物剂例如氯，然后 随后将经处理的水通过填充塔或空气汽提器，其中通过在大约40°至大约200°F的温度范围内使空气与水流反向通过来除去挥发性有机污染物。
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4.发明授权
公开(公告)号：US4798675A
公开(公告)日：1989-01-17
申请号：US110138
申请日：1987-10-19
摘要： Corrosion inhibiting compositions for inhibiting corrosion and the deposition of mineral scale on metal in aqueous systems contain sequestrants such as carboxylic acids, phosphates, or optionally sulfur containing lignosulfonates, as well as carboxylated phosphonic acids of the formula ##STR1## wherein m is from 1 to about 6, wherein n is from 0 to about 6, wherein R is --H, -alkyl, -alkenyl, -alkynyl, -aryl, -alkyl substituted aryl, -cycloalkyl, -methylene phosphonic acid, or -methylene carboxylic acid, and wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently is --H, -alkyl, -aryl, -alkyl substituted aryl, --OH, --SH, --NH.sub.2, --PO.sub.3 H.sub.2, --CH.sub.2 PO.sub.3 H.sub.2, --CO.sub.2 H, --CH.sub.2 CO.sub.2 H, halogen, or --SO.sub.3 H. The composition can also contain other corrosion inhibiting compounds such as azoles, molybdates, and the like.
摘要翻译： 用于抑制腐蚀和矿物垢在水性体系中的金属沉积的腐蚀抑制组合物含有螯合剂，例如羧酸，磷酸盐或任选的含硫木质素磺酸盐，以及下式的羧酸化膦酸： 其中m为1至约6，其中n为0至约6，其中R为-H， - 烷基， - 烯基， - 炔基， - 芳基， - 烷基取代的芳基， - 环烷基， - 亚甲基膦酸， 或 - 亚甲基羧酸，其中R 1，R 2，R 3和R 4独立地是-H， - 烷基， - 芳基， - 烷基取代的芳基，-OH，-SH，-NH 2，-PO 3 H 2，-CH 2 PO 3 H 2，-CO 2 H - CH2CO2H，卤素或-SO3H。 该组合物还可以含有其它腐蚀抑制化合物如唑，钼酸盐等。
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