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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 (10-1 Nakano 4-chome, Nakano-k, Tokyo 01, 〒1640001, JP)
SHIMURA, Yukimasa (10-1 Nakano 4-chome, Nakano-k, Tokyo 01, 〒1640001, JP)
Application Number:
JP2017/023600
Publication Date:
January 11, 2018
Filing Date:
June 27, 2017
Export Citation:
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Assignee:
KURITA WATER INDUSTRIES LTD. (10-1, Nakano 4-chome Nakano-k, Tokyo 01, 〒1640001, JP)
International Classes:
C23F11/14; C02F1/70; C23F11/12; F22B37/52
Domestic Patent References:
2015-02-12
Foreign References:
US20020100896A12002-08-01
JP2003147554A2003-05-21
JP2004323954A2004-11-18
Attorney, Agent or Firm:
OHTANI, Tamotsu et al. (OHTANI PATENT OFFICE, Toranomon ES Bldg. 7F. 25-2, Toranomon 3-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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