公开(公告)号：EP0121631A3

公开(公告)日：1986-05-14

申请号：EP83307493

申请日：1983-12-08

Applicant: CHEMED CORPORATION

Inventor： Baker, Gary Lee

IPC: C02F05/10

CPC classification number: F28G9/00 ,  A47L15/0057 ,  C02F5/08 ,  C02F5/10

Abstract: A method of removing adherent scale from the internal surfaces of water heating, cooling or circulating systems such as boilers, cooling towers and the like. A descalant comprising a polyacrylate or a polymethacrylate, within a certain molecular weight and concentration range, is mixed with the water in the system and is circulated through the system for a period effective to dissolve the scale adhering to the surface. The descalant is used in a concentration which is effective both to dissolve the scale, and to permit the descalant itself to remain in solution after the scale has been dissolved. For scale remover having a molecular weight in the range of about 500 to about 100,000, the effective concentration is from about 125 ppm to about 1,000 ppm and preferably is from about 500 ppm to about 550 ppm. A preferred descalant is the sodium salt of polyacrylic acid having a molecular weight in the range of about 1,000 to 10,000 and used in a concentration in the range from about 500 to about 550 ppm.

公开(公告)号：EP0082657A3

公开(公告)日：1983-09-14

申请号：EP82306648

申请日：1982-12-13

Applicant: CALGON CORPORATION

Inventor： Costello, Christine A. ,  Matz, Gary F. ,  Sherwood, Nancy S. ,  Boffardi, Bennett P. ,  Yorke, Monica A. ,  Amjad, Zahid

IPC: C02F05/10 ,  C23F11/10 ,  C09K07/02 ,  E21B43/20 ,  E21B43/22 ,  C08F226/00 ,  C08F220/60 ,  C08F220/34 ,  C08F230/02

CPC classification number: C09K8/882 ,  C02F5/12 ,  C02F5/14 ,  C08F220/04 ,  C08F220/54 ,  C09K8/12 ,  C09K8/14 ,  C09K8/24 ,  C09K8/528 ,  C09K8/54 ,  C23F11/173 ,  E21B21/003

Abstract: Polyampholytes and their salts are used as scale and corrosion inhibitors, in drilling fluids and as a water oil ratio modifier in enhanced oil recovery. Novel polyampholyte polymers of intrinsic viscosity 0.05 to 4.5 in 1.0 M Na Cl are prepared from 20 to 90 weight % of a monomer of formula:
in which each R. which may be the same as or different from the other, is hydrogen, phenyl, C 1-3 alkyl or -COOX. R' is a straight or branched chain of from 0 to 12 carbon atoms, and X is hydrogen or an alkali or alkaline-earth metal; 1.5 to 85 weight % of a monomer of formula:
where each R 6 , which may be the same as or different from the other, is hydrogen, phenyl or C 1-3 alkyl, preferably hydrogen, methyl, or ethyl, and each R 2 , which may be the same as or different from the other, is hydrogen or C 1-3 alkyl; and 0.5 to 40 weight weight % of a cationic-containing monomer containing quaternary ammonium, phosphonium or sulfonium ion.

公开(公告)号：EP0032041A3

公开(公告)日：1981-10-07

申请号：EP80304666

申请日：1980-12-22

Applicant: PFIZER INC.

Inventor： Walinsky, Stanley Walter

IPC: C02F05/10 ,  C08F22/02 ,  C08F22/14 ,  C08F22/16

CPC classification number: C02F5/10

Abstract: A method for controlling scale deposition from water containing scale forming impurities, which comprises:
treating the water with at least about 0.5 part per million of a polymer of fumaric acid with from 0 to about 50 mole percent of at least one hydrophilic monomer selected from acrylamide, methacrylamide, acrylic acid, methacrylic acid or maleic anhydride and from 0 to about 15 mole percent of at least one ethylenically unsaturated, hydrophobic monomer, the average molecular weight of the polymer being from about 300 to about 10,000; processes for the production of said polymers; polymeric intermediates of mono or dialkyl fumarate, and processes for their production.

公开(公告)号：WO1991006511A1

公开(公告)日：1991-05-16

申请号：PCT/US1990004824

申请日：1990-08-24

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  FALK, David, O. ,  BEAZLEY, Phillip, M. ,  DORMISH, Frank, L. ,  THOMPSON, Ronald, G.

IPC: C02F05/10

CPC classification number: C09K8/528 ,  C02F5/10

Abstract: A relatively high molecular weight polyvinyl sulfonate and a process for inhibiting scale deposition, particularly inorganic sulfate such as barium sulfate, wherein an aqueous fluid present in or produced from a subterranean formation is contacted with an aqueous solution having a relatively high molecular weight polyvinyl sulfonate dissolved therein. The aqueous fluid has a pH equal to or less than 6.0 and the polyvinyl sulfonate has a molecular weight of from about 9,000 to about 30,000.

公开(公告)号：WO1990011972A1

公开(公告)日：1990-10-18

申请号：PCT/US1990001774

申请日：1990-04-03

Applicant: MOBIL OIL CORPORATION

Inventor： MOBIL OIL CORPORATION ,  MORRIS, Richard, L. ,  PAUL, James, Mark

IPC: C02F05/10

CPC classification number: C02F5/12 ,  B09C1/02 ,  C02F5/08 ,  C02F5/10 ,  C02F2101/006 ,  C09K8/528 ,  E21B43/28 ,  G21F9/002

Abstract: Alkaline earth metal scales, especially barium sulfate scale deposits are removed from oilfield pipe and other tubular goods with a scale-removing composition comprising an aqueous alkaline solution having a pH of about 8 to about 14, preferably about 11 to 13, of a polyaminopolycarboxylic acid, preferably EDTA or DTPA and a catalyst or synergist comprising, in particular, oxalate, thiosulfate, nitriloacetate or monocarboxylic acid anions. When the scale-removing solution is contacted with a surface containing a scale deposit, substantially more scale is dissolved at a faster rate than is possible without the synergist.

Abstract translation: 碱性土金属垢，特别是硫酸钡垢沉积物从具有除垢组合物的油田管和其它管状物质中除去，其包含pH为约8至约14，优选约11至13的聚氨基多羧酸的碱性水溶液 ，优选EDTA或DTPA，以及包含特别是草酸盐，硫代硫酸盐，次乙酸盐或单羧酸阴离子的催化剂或增效剂。 当除垢溶液与包含垢沉积物的表面接触时，在没有增效剂的情况下，以比可能的速度更快地溶解大量的氧化皮。

公开(公告)号：WO1990007469A1

公开(公告)日：1990-07-12

申请号：PCT/US1989005877

申请日：1989-12-29

Applicant: BENSON, Bradley, J. ,  WRIGHT, Jorae

IPC: C02F05/10

CPC classification number: A61K9/127 ,  A61K9/0073 ,  A61K9/0082

Abstract: Pulmonary administration of a pharmaceutically active substance useful for local or systemic action which comprises liposomes containing an effective amount of a pharmaceutically active substance, and an amount of alveolar surfactant protein effective to enhance transport of the liposomes across a pulmonary surface.

公开(公告)号：WO1988006143A1

公开(公告)日：1988-08-25

申请号：PCT/GB1988000084

申请日：1988-02-11

Applicant: DONMARN LIMITED ,  WILLIAMSON, Frank, Blake

Inventor： DONMARN LIMITED

IPC: C02F05/10

CPC classification number: C02F5/12 ,  C02F5/10 ,  C02F5/14

Abstract: Anti-scaling derivatives of raffinose in which one or more of the hydroxyl groups thereof have been converted to sulphate half ester groups or such groups in salt form.

Abstract translation: 棉子糖的抗鳞屑衍生物，其中一个或多个羟基已被转化为硫酸酯半酯基或盐形式的这些基团。

公开(公告)号：WO1996011169A1

公开(公告)日：1996-04-18

申请号：PCT/US1995012479

申请日：1995-10-06

Applicant: KAY CHEMICAL COMPANY

Inventor： KAY CHEMICAL COMPANY ,  WHITTEMORE, Michael ,  LACOSSE, Gerald ,  RILEY, Jennifer

IPC: C02F05/10

CPC classification number: C23F11/124 ,  C02F5/10 ,  C23F11/126

Abstract: The present invention relates to a composition and method for inhibiting chloride-induced corrosion of and limescale formation on ferrous metals and alloys which contact aqueous solutions, the composition containing a corrosion inhibiting amount of at least one polycarboxylic acid and/or its alkali metal or alkaline earth metal salts and a sufficient amount of a base to bring the aqueous solution to a pH effective to inhibit both chloride-induced corrosion and limescale formation.

Abstract translation: 本发明涉及一种用于抑制与金属和合金接触的氯化物诱导的腐蚀和水垢形成的组合物和方法，该组合物含有腐蚀抑制量的至少一种多元羧酸和/或其碱金属或碱 土壤金属盐和足够量的碱以使水溶液达到有效抑制氯化物诱导的腐蚀和石灰石形成的pH。

公开(公告)号：WO1996010543A1

公开(公告)日：1996-04-11

申请号：PCT/US1995012486

申请日：1995-09-29

Applicant: DREW CHEMICAL CORPORATION

Inventor： DREW CHEMICAL CORPORATION ,  BEARDWOOD, Edward, S.

IPC: C02F05/10

CPC classification number: C02F5/105 ,  C02F5/125 ,  C23F11/08 ,  C23F11/10

Abstract: This invention relates to a metal corrosion inhibiting composition comprising in admixture: (a) an anodic silicate salt; (b) a silicate salt stabilizer; (c) a cathodic corrosion inhibitor; and water. Preferably, the corrosion inhibiting composition also contains a polymeric scale inhibitor. The invention also relates to a process for treating an open aqueous system with the corrosion inhibiting composition.

Abstract translation: 本发明涉及一种金属腐蚀抑制组合物，其包含：（a）阳极硅酸盐; （b）硅酸盐稳定剂; （c）阴极腐蚀抑制剂; 和水。 优选地，腐蚀抑制组合物还含有聚合物阻垢剂。 本发明还涉及一种用腐蚀抑制组合物处理开放的含水体系的方法。

公开(公告)号：WO1995013247A1

公开(公告)日：1995-05-18

申请号：PCT/US1993010884

申请日：1993-11-11

Applicant: MARATHON OIL COMPANY

Inventor： MARATHON OIL COMPANY ,  BARTHORPE, Richard, T. ,  DORMISH, Frank, L.

IPC: C02F05/10

CPC classification number: C02F5/10

Abstract: A method for inhibiting inorganic sulfate scale growth in an aqueous fluid present within or produced from a subterranean formation is preformed by contacting the aqueous fluid in situ with a scale inhibitor composition containing two homopolymers in solution within an aqueous liquid medium. The first homopolymer is a polyvinyl sulfonate and the second homopolymer is a polyacrylic acid. The weight ratio of the first homopolymer to second homopolymer is preferably at least about 1:1 and the aqueous fluid being contacted by the composition typically contains a relatively high concentration of precursor ions of inorganic sulfate scale, including scale-forming inorganic cations and scale-forming sulfate anions.

Abstract translation: 通过使含水流体原位与在含水液体介质中的溶液中含有两种均聚物的防垢剂组合物接触，来防止存在于地层内或由地下地层产生的含水流体中的无机硫酸盐垢生长的方法。 第一均聚物是聚乙烯基磺酸盐，第二均聚物是聚丙烯酸。 第一均聚物与第二均聚物的重量比优选为至少约1:1，并且与组合物接触的水性流体通常含有相对高浓度的无机硫酸盐垢的前体离子，包括水垢形成无机阳离子， 形成硫酸根阴离子。