Title:
DEOXIDIZING AGENT FOR BOILERS AND METHOD FOR DEOXIDIZING BOILER WATER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/008477
Kind Code:
A1
Abstract:
Provided is a deoxidizing agent for boilers, which exhibits excellent oxygen removal effect under wide temperature conditions.
A deoxidizing agent for boilers, which contains (A) a hydroxylamine compound represented by general formula (I), (B) a heterocyclic compound having an N-substituted amino group, and (C) an aminophenol derivative represented by general formula (II).
(In formula (I), each of R1 and R2 independently represents an alkyl group having 1-5 carbon atoms.)
(In formula (II), each of R3-R6 independently represents (a) a moiety represented by general formula (III), (b) -OR10 or (c) -R11, and at least one of the R3-R6 moieties represents (a); and each of R10 and R11 independently represents a hydrogen atom or an alkyl group having 1-4 carbon atoms.)
(In formula (III), R7 represents a single bond or an alkylene group having 1-4 carbon atoms; and each of R8 and R9 independently represents a hydrogen atom or an alkyl group having 1-4 carbon atoms.)
Inventors:
LIN QIAN (JP)
SHIMURA YUKIMASA (JP)
SHIMURA YUKIMASA (JP)
Application Number:
PCT/JP2017/023600
Publication Date:
January 11, 2018
Filing Date:
June 27, 2017
Export Citation:
Assignee:
KURITA WATER IND LTD (JP)
International Classes:
C02F1/70; C23F11/14; C23F11/12; F22B37/52
Domestic Patent References:
| WO2015018508A1 | 2015-02-12 |
Foreign References:
| US20020100896A1 | 2002-08-01 | |||
| JP2003147554A | 2003-05-21 | |||
| JP2004323954A | 2004-11-18 |
Other References:
See also references of EP 3489387A4
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (JP)
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