Title:
Anionic copolymers suitable as scaling inhibitors for sulfide-containing scale
Document Type and Number:
WIPO Patent Application WO/2021/106710
Kind Code:
A1
Abstract:
The present invention relates to anionic copolymers, which are suitable as sulfide scaling inhibitors in water bearing systems, in particular as inhibitors for the formation of antimony(III) sulfide-containing scale. The present invention also relates to a method for reducing sulfide scaling in water bearing systems, in particular in water loops of geothermal power plants, in which the formation of sulfide-containing scale and especially the formation of antimony(III) sulfide-containing scale may occur. The anionic copolymers have the following characteristics: 1) The copolymers comprise a. polymerized units of a monomer M1, which is a primary amide of a monoethylenically unsaturated monocarboxylic acid having 3 to 6 C atoms and b. polymerized units of a monoethylenically unsaturated monomer M2, which is selected from monoethylenically unsaturated monomer having a sulfonate group and or a sulfate group and monoethylenically unsaturated monomer having a carboxyl group and mixtures thereof; 2) The copolymers have an anionic charge density in the range from 0.5 to 6.0 mol/kg, 3) The sodium salts of the copolymers have a weight average molecular weight Mw of at least 10000 g/mol, as determined by gel permeation chromatography.
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Inventors:
MATHEIS JURGEN (DE)
WOLF FLORIAN (DE)
HATER WOLFGANG (DE)
WOLF FLORIAN (DE)
HATER WOLFGANG (DE)
Application Number:
PCT/JP2020/042984
Publication Date:
June 03, 2021
Filing Date:
November 18, 2020
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C02F5/12; C02F5/00; C02F5/14; C02F101/10
Foreign References:
| US6217778B1 | 2001-04-17 | |||
| US5256303A | 1993-10-26 | |||
| US4801388A | 1989-01-31 | |||
| EP0361592A2 | 1990-04-04 | |||
| US5288411A | 1994-02-22 | |||
| US4818506A | 1989-04-04 | |||
| US4224151A | 1980-09-23 | |||
| US5032298A | 1991-07-16 | |||
| US5403493A | 1995-04-04 | |||
| US5256303A | 1993-10-26 | |||
| US4801388A | 1989-01-31 | |||
| US20180327294A1 | 2018-11-15 |
Other References:
DARRELL L GALLUP: "Geochemistry of geothermal fluids and well scales, and potential for mineral recovery", ORE GEOLOGY REVIEWS, vol. 12, no. 4, 1 June 1998 (1998-06-01), AMSTERDAM, NL, pages 225 - 236, XP055418255, ISSN: 0169-1368, DOI: 10.1016/S0169-1368(98)00004-3
WILSON ET AL: "Controls on stibnite precipitation at two New Zealand geothermal power stations", GEOTHERMICS, PERGAMON PRESS, GB, vol. 36, no. 4, 21 July 2007 (2007-07-21), pages 330 - 347, XP022162706, ISSN: 0375-6505, DOI: 10.1016/J.GEOTHERMICS.2007.04.001
K. BROWN, PROCEEDINGS INTERNATIONAL WORKSHOP ON MINERAL SCALING, 25 May 2011 (2011-05-25), pages 103 - 106
J. S. GILL ET AL., GRC TRANSACTIONS, vol. 37, 2013
L. MULLER ET AL., PROCEEDINGS WORLD GEOTHERMAL CONGRESS 2015, 19 April 2015 (2015-04-19), pages 1 - 11
HATER ET AL., PROCEEDINGS OF THE EUROCORR CONFERENCE, 2013
"The study of Amjad in Materials Performance", vol. 55, 2016, NACE INTERNATIONAL
L.H. MIKKELSEN, WAT. RES., vol. 37, 2003, pages 2458 - 2466
K. UENO ET AL., J. CHEM. EDU., vol. 62, no. 7, 1985, pages 627
J. PLANK, B. SACHSENHAUSER CEMENT AND CONCRETE RESEARCH, vol. 39, no. 1, 2009, pages 1 - 5
S. KOLTZENBURGM. MASKOSO. NUYKEN: "Polymer Chemistry", 2017, SPRINGER-VERLAG
D. BRAUN ET AL., PRAKTIKUM DER MAKROMOLEKULAREN STOFFE
WILSON ET AL: "Controls on stibnite precipitation at two New Zealand geothermal power stations", GEOTHERMICS, PERGAMON PRESS, GB, vol. 36, no. 4, 21 July 2007 (2007-07-21), pages 330 - 347, XP022162706, ISSN: 0375-6505, DOI: 10.1016/J.GEOTHERMICS.2007.04.001
K. BROWN, PROCEEDINGS INTERNATIONAL WORKSHOP ON MINERAL SCALING, 25 May 2011 (2011-05-25), pages 103 - 106
J. S. GILL ET AL., GRC TRANSACTIONS, vol. 37, 2013
L. MULLER ET AL., PROCEEDINGS WORLD GEOTHERMAL CONGRESS 2015, 19 April 2015 (2015-04-19), pages 1 - 11
HATER ET AL., PROCEEDINGS OF THE EUROCORR CONFERENCE, 2013
"The study of Amjad in Materials Performance", vol. 55, 2016, NACE INTERNATIONAL
L.H. MIKKELSEN, WAT. RES., vol. 37, 2003, pages 2458 - 2466
K. UENO ET AL., J. CHEM. EDU., vol. 62, no. 7, 1985, pages 627
J. PLANK, B. SACHSENHAUSER CEMENT AND CONCRETE RESEARCH, vol. 39, no. 1, 2009, pages 1 - 5
S. KOLTZENBURGM. MASKOSO. NUYKEN: "Polymer Chemistry", 2017, SPRINGER-VERLAG
D. BRAUN ET AL., PRAKTIKUM DER MAKROMOLEKULAREN STOFFE
Attorney, Agent or Firm:
SHIGENO, Tsuyoshi et al. (JP)
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