| 摘要 |
PURPOSE: An oxygen scavenger which can effectively remove dissolved oxygen in water and, in particular, is useful in inhibiting the corrosion in a boiler system by removing dissolved oxygen in feed water, a boiler water treatment chemical including such an oxygen scavenger and descaling chemicals are provided. CONSTITUTION: The oxygen scavenger is characterized in that the effective component thereof consists of a heterocyclic compound with N-N bond in a ring thereof, wherein the compound is 1,3-dimethyl-5-pyrazolone, wherein the compound is urazole, wherein the compound is 6-azauracil, wherein the compound is 3-methyl-5-pyrazolone, and wherein the compound is 3-methyl-5- pyrazolin-5-on. The chemical for treating boiler water comprises a heterocyclic compound with N-substituted amino group and neutral amine, wherein the heterocyclic compound is N-aminomorpholine, 1-aminopyrrolidine, 1-amino-4-methylpiperazine, 1,4-diaminopiperazine, 1-aminopiperidine, 1-aminohomopiperidine, morpholinobiguanide, or water soluble salt of the aforementioned heterocyclic compounds and carboxylic acid such as succinic acid, gluconic acid, glutaric acid, adipic acid, glycolic acid, lactic acid, malic acid, tartaric acid, or citric acid, polycarboxylic acid such as polyacrylic acid, and wherein the neutral amine is cyclohexylamine, 2-amino-2-methyl-1-propanol, monoethanolamine, diethanolamine, morpholine, monoisopropanolamine dimethylethanolamine, diethylethanolamine, dimethylpropanolamine, or dimethylpropylamine. |
