Title:
METHOD OF COOLING WATER TREATMENT AND TREATMENT CHEMICAL
Document Type and Number:
WIPO Patent Application WO/2005/116296
Kind Code:
A1
Abstract:
With respect to open circulatory cooling water systems, the metal corrosion and scale fault can be simultaneously prevented. There is provided a method of treating cooling water, comprising adding a calcium carbonate precipitation inhibitor and a calcium carbonate dispersant to cooling water to thereby disperse calcium carbonate microparticles in the cooling water with the result that an anticorrosive coating is formed on the metal surface. By forming calcium carbonate acting on corrosion sites of metal in advance into dispersible microparticles and causing them to be present in cooling water, not only is the amount of supply to corrosion sites increased to thereby provide an anticorrosive film of calcium carbonate promptly, stably and certainly but also the dispersion thereof is promoted to thereby prevent excessive scale attachment and hence prevent scale fault. For attaining formation and dispersion of fine calcium carbonate microparticles, the calcium carbonate precipitation inhibitor capable of preventing the precipitation of calcium carbonate is used in combination with the calcium carbonate dispersant for effecting dispersion, within a given range of size, of calcium carbonate occurring in a water medium exceeding the limit of precipitation preventing capability of the calcium carbonate precipitation inhibitor so as to prevent any coarsening thereof.
Inventors:
OTAKA HIDEO (JP)
KODA MASAYORI (JP)
ISERI HAJIME (JP)
KODA MASAYORI (JP)
ISERI HAJIME (JP)
Application Number:
PCT/JP2005/001472
Publication Date:
December 08, 2005
Filing Date:
February 02, 2005
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
OTAKA HIDEO (JP)
KODA MASAYORI (JP)
ISERI HAJIME (JP)
OTAKA HIDEO (JP)
KODA MASAYORI (JP)
ISERI HAJIME (JP)
International Classes:
C02F5/00; C02F5/10; C02F5/14; C09K23/52; C23F11/12; C23F11/173; C23F14/02; F28C1/16; F28F19/01; F28G13/00; (IPC1-7): C23F11/12; C02F5/00; C02F5/10; C02F5/14; C23F11/173; C23F14/02; F28C1/16; F28F19/01; F28G13/00
Foreign References:
| JP2003525104A | 2003-08-26 | |||
| JPH0231894A | 1990-02-01 | |||
| JPS61118199A | 1986-06-05 | |||
| JPS61107998A | 1986-05-26 | |||
| JP2004107782A | 2004-04-08 | |||
| JPH06287777A | 1994-10-11 |
Attorney, Agent or Firm:
Shigeno, Tsuyoshi (9F 5-10, Shinjuku 2-chome, Shinjuku-k, Tokyo 22, JP)
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