Oxime compounds (dimethyl ketoxime, methyl ethyl ketoxime (butanone oxime) and acetaldehyde oxime), as a new type of oxygen scavenger, were patented by Drew Chemical Company of the United States in 1984. They have the characteristics of low toxicity, high efficiency, high speed and passivation protection, and are widely used in developed countries such as Europe, America and Japan, and were successfully developed and popularized in China in the 1990s.
I. Product identification
Si Nuo. English name: 2- butanone
English synonym for oxime: MEKOSKINO Schino
2; skino # 2； Ekskin
2; Arlen
M
1; USA fam-3； Methyl ethyl ketone oxime; air force
AM-3； Chinese name of 2- butanoxime: methyl ethyl ketoxime Chinese synonym: butanone oxime; Methyl ethyl ketoxime; Ethyl copper oxime; Methyl ethyl ketone fat; 2- butanone oxime; Oxime; 2- butanone oxime, 99% CBNo.: CB3393662 Molecular formula: H9NO Molecular weight: 87. 12 II. physicochemical property
melting point
：
-30
C
boiling point
：
59-60
C 15
millimetre
Mercury (liter. ) density
：
0.924
Gram/ml
exist
25
C (literature. ) steam density:
three
(contrast
Air) steam pressure:
eight
millimetre
mercury
(
20
C) refractive index
：
N20/ day
The flash point is 1.442 (liter. )
：
140
F, water solubility at 69℃
：
1 14
Gram/liter
(20
BRN
：
169824 1 stability:
Stable.
Flammable.
incompatible
along with
strong
oxidate
Special agent.
May
reaction
along with
strong
Sour
arrive
form
One; one
explosive
Materials. court of arbitration for sports
Database:
96-29-7 (Chinese Academy of Sciences
database
Reference) NIST chemical information:
2- butanone,
Chemical information of oxime (96-29-7)EPA:
2- butanone,
Oxime (96-29-7)
III. Product performance and function (1) Deoxygenation performance:
Oxime compounds are organic compounds with oxime groups. At present, the oxime compounds used for boiler deoxygenation and shutdown protection mainly include acetaldehyde oxime, dimethyl ketoxime and methyl ethyl ketoxime.
Oxime compounds are highly reductive and easily react with oxygen.
Oxime compounds have good oxygen removal performance in a wide temperature and pressure range, and the most suitable temperature range is 138 ~ 336℃ and pressure range is 0.3 ~ 13.7 MPa.
According to the comparative experiment, under the same conditions, the oxygen removal rate and efficiency of oxime compounds are higher than that of hydrazine.
(2) Corrosion inhibition and passivation:
Oxime compounds can reduce the oxides of high valence iron and copper to low valence oxides, and their aqueous solutions can form a good magnetic oxide film on the surface of steel, which plays a good role in passivation and corrosion inhibition of metal surfaces.
Among them, dimethyl ketoxime has the best effect and the least dosage.
Through comparative experiments, it is found that oxime compounds have the same passivation and corrosion inhibition effect as hydrazine, which can significantly reduce the iron content in the solution and protect steel under high temperature and high pressure, among which dimethyl ketoxime has the best effect and the least dosage.
At the same time, oxime compounds can clean the corrosion products of copper deposited in pipelines, economizers and so on. This is also the reason why the copper content in boiler water increased obviously in the early stage of using oxime compounds.
(3) volatility:
The volatility of oxime compounds is higher than that of hydrazine, DEHA, morpholine, cyclohexylamine, etc., and close to that of NH3.
When the volatile deoxidizer is condensed by steam, a certain amount of chemicals will be dissolved in the condensed water, which is beneficial to protect the metal materials of the condensed water system.
(4) decomposability:
Through the decomposition experiment under high temperature and high pressure, the decomposition products of oxime compounds are NH3, N2, H2O and trace acetic acid, and no formic acid is generated, which has 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, acetaldehyde oxime is 1900mg/kg, methyl ethyl ketone oxime is 2800mg/kg, and dimethyl ketone oxime is 5500mg/kg. It can be seen that hydrazine is very toxic, while oxime compounds are very toxic and belong to low toxic compounds.
The contact test between skin and mucosa shows that oxime deoxidizers have no obvious stimulation and damage, while hydrazine causes skin swelling, erosion and mucosal congestion.
Fourth, the product method
It is obtained by the reaction of butanone and hydroxylamine hydrochloride.
Butanone can also react with hydroxylamine sulfate.
Verb (abbreviation of verb) product use
It can be used for anti-skinning treatment of various oil-based paints, alkyd paints, epoxy ester paints, etc. It can also be used as a silicon curing agent during storage and transportation.
Mainly used as anti-skinning agent and silicon curing agent for alkyd resin coatings.
As an antioxidant, this product is better than butyraldehyde oxime and cyclohexanone oxime in preventing skinning.
It can also be used as waterborne polyurethane resin.
Used in organic.
Security information of intransitive verbs
Dangerous goods sign
：
Xn，T
Danger category
：
2 1-40-4 1-43-52/53-48/25
Safety instructions
：
13-23-26-36/37/39-6 1-45-36/37-25
Dangerous goods transport number
：
Acronym for UNITED NATIONS.
1993
3/PG
three
WGK
Germany
：
1
RTECS number:
EL9275000
danger classes
：
three
Packaging group
：
Roman numeral 3
Customs editor
：
29280090 methyl ethyl ketoxime
Message switching data service
2- butanone
oxime