the study of 3-chloro-2-methylaniline

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the study of 3-chloro-2-methylaniline

Post  jiangxiao on Fri Aug 05, 2011 7:34 am

3-chloro-2-methylaniline, a kind of important material to synthesize pesticide and dyestuff and it is also used to manufacture BAS-514H and DB-50. The molecular formula for it is C7H8ClN. Molecular weight is 141.5. Its’ content than the equal to 99%. From the outside, it's the palm to colorless transparent liquid oil. The melting point of it is 2°C, boiling point is 245°C (115-117 °/1.33 kpa) refractive index: 1.588 °C (20), specific gravity of 1.185, the flash point of 110°C. Soluble in most organic solvents and with the water vapor in the air, volatile soon become brown.
The potential of an on-line combination of supported liquid membrane extraction and liquid chromatography for the determination of aniline derivatives in environmental water samples has been investigated. Seven aniline derivatives (aniline, 4-chloroaniline, 2-chlororaniline, 4-chloro-2-methylanline, 3-chloro-2-methylaniline, 2-chloro-4-methylaniline and 3,5-dichloroaniline), covering a wide range in polarity and in dissociation constants, were chosen as model compounds. Calibrations were linear in the 0.1–1 μg L?1 range, with good correlation coefficients (r>.997). Detection limits were in the range 0.005–0.015 μg L?1.
There is a new method to determine the environmental waters .Fully automated on-line supported liquid membrane-liquid chromatographic determination of aniline derivates .
There is a preparation method: by the neighbors superior TNT via chlorination, reduction. First, Chlorinated in neighboring superior TNT and add 2% of chloride-ferric chloride as a catalyst, in 50-60 ℃ access to the reaction liquid chlorine, the relative density reach 1.27 1.29 (50 ℃) so far with 5% hydrochloric acid, washing, again, with liquid water washing the alkali adjust pH of 7. As water, steam to points after water, vacuum distillation, collect 120 150 ℃ (5.33-8.0 kPa) fractions, cooling, filtering, get two crystallization of 6-superior TNT. Second, Reduction will hydrochloric acid and iron powder in reaction pot, stir heating to 90 ℃, slowly pour in the melting of 2-chloro-6-superior TNT, add to finish, backflow reaction 3 h. Cooling, liquid alkali and adjust pH, steam distillation for 8, 3-chlorine adjacent armour aniline. This is the way to make 3-chloro-2-methylaniline.[url= ]3-chloro-2-methylaniline[/url][url= ]3-chloro-2-methylaniline[/url]


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