| CAS No.: | 96-29-7 |
|---|---|
| Formula: | C4h9no |
| EINECS: | C4h9no |
| Classification: | 2-Butanone Oxime |
| Grade Standard: | Industrial Grade |
| Whether Ring Formation or Not: | Cyclic Hydrocarbon |
| Customization: |
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| Name | 2-Butanone oxime |
| Synonyms | Methyl ethyl ketoxime; Ethyl methyl ketone oxime |
| Molecular Structure | |
| Molecular Formula | C4H9NO |
| Molecular Weight | 87.12 |
| CAS Registry Number | 96-29-7 |
| EINECS | 202-496-6 |
| Density | 0.923 |
|---|---|
| Melting point | -30 ºC |
| Boiling point | 152 ºC |
| Refractive index | 1.441-1.444 |
| Flash point | 60 ºC |
| Water solubility | 114 g/L (20 ºC) |
(1) Deoxygenation performance: Oxime compounds are organic compounds with oxime groups. At present, the oxime compounds used for boiler deoxygenation and boiler shutdown protection mainly include acetaldehyde oxime, dimethyl ketone oxime (acetone oxime) and methyl ethyl ketone oxime. Oxime compounds have strong reducibility and react easily with oxygen. Oxime compounds have good deoxygenation performance in a wide range of temperature and pressure, the most suitable temperature range is 138 ~ 336ºC, the pressure range is 0.3 ~ 13.7Mpa. According to the comparative experiment, under the same conditions, the deoxygenation rate and deoxygenation efficiency of oxime compounds are higher than that of hydrazine.
(2) Corrosion inhibition and passivation: oxime compounds can reduce high-priced iron and copper oxides to low-priced oxides, and its aqueous solution can form a good magnetic oxide film on the steel surface, which plays a good passivation and corrosion inhibition effect on the metal surface. Among them, dimethylketoxime has the best effect and requires the least amount of use. According to comparative experiments, oxime compounds have the same passivation and corrosion inhibition effects as hydrazine, which can significantly reduce the iron content in the solution. Under the conditions of high temperature and pressure, it has a protective effect on steel, among which dimethyl ketoxime has the best effect and needs the least amount. At the same time, oxime compounds have a cleaning effect on copper corrosion products deposited in pipelines, economizers, etc., which is also the reason why the copper content in furnace water increased significantly in the early stage of using oxime compounds.
(3) Volatility: The volatility of oxime compounds is higher than hydrazine, DEHA, morpholine, cyclohexylamine, etc., which is close to the volatility of NH3. When the highly volatile deaerator condenses in steam, there will be a certain amount of the agent dissolved in the condensate water, which is conducive to protecting the metal materials of the condensate system.
(4) Decomposition: Through the decomposition experiment under high temperature and pressure conditions, the decomposition products of oxime compounds are NH3, N2, H2O, trace acetic acid, no formic acid production, no adverse effect on the water vapor system.
(5)Low toxicity: According to the comparison of LD50 data, the LD50 of hydrazine is 290mg/kg, acetaldoxime is 1900mg/kg, methyl ethyl ketoxime is 2800mg/kg, and dimethyl ketoxime is 5500mg/kg. It can be seen that the toxicity of hydrazine is relatively strong, while the toxicity of oxime compounds is very small, belonging to low toxicity compounds. The skin and mucous membrane contact test showed that oxime deaerators had no obvious irritation and damage, but hydrazine caused skin swelling, erosion, mucous membrane congestion and other damage.
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