Ethylene chlorohydrin




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ethylene chlorohydrin has been studied

Time:2015/12/18 6:20:31

Regularities and Features of the Reaction of 2-Amino-6-nitro- and 2,6-Diaminobenzothiazoles with Ethylene Chlorohydrin

The alkylation of 2-amino-6-nitro- and 2,6-diaminobenzothiazoles by ethylene chlorohydrin has been studied. A comparative analysis has been made of the composition of these reaction mixtures and of those obtained from other 2-aminobenzothiazoles using this reaction. The structure of the synthesized compounds was confirmed using IR and 1 H NMR spectroscopy, mass spectrometry, and X-ray diffraction and via alternative syntheses.

Two-stage prodn. of high-purity, anhydrous ethylene chlorohydrin

Prodn. comprising reaction of ethylene oxide with HCl in a two-stage reactor is characterised in that reaction is conducted in milieu of liq. ethylene chlorohydrin with HCl excess 10-40 mole% in first stage and neutralisation of excess HCl by ethylene oxide in second stage of the reactor. HCl excess in ethylene chlorohydrin in both reactor stages, is controlled by functional relation of conductivity of reaction milieu on HCl concn. at given temp. First stage is conducted at 20-60 deg.C whereby HCl excess makes it possible to reach selectivity of 90-100%. In second stage, reaction is conducted at 10-30 deg.C. Off-gas from first stage is led into bottom part of absorber placed above first reactor stage and countercurrently, it is scrubbed by raw neutralised ethylene chlorohydrin from second reactor stage which is cooled down to 10 to -20 deg.C. Offgas from second reactor stage is led to bottom part of other absorber and countercurrently it is scrubbed by raw ethylene chlorohydrin satd. by HCl which passes away over overfall from first stage. Pure 98-99% ethylene chlorohydrin is taken away as distillate from rectification column head and boiler temp. is kept under 110 deg.C. Glass, PTFE and polyolefins are used to make the appts.