The best results of the waste 1,1,2-trichloroethane dehydrochlorination by 10 wt % NaOH are obtained in temperature 70-80 'C at NaOWl12-TCE molar ratio 1.1:l and flow rate 270 g/(dm3 h). In these conditions 98.3 wt % vinylidene chloride and aqueous layer (13 wt % NaCl + 0.07 wt % NaOH) are obtained. Vinylidene chloride yield is 97.5 mol %.IE940481T @ Abstract published in Advance ACS Abstracts, May 1, 1995.

A method of recovery of the organic compounds : dichloropropanols, epichlorohydrin, 1,2,3-trichIoropropane from epichlorohydrin plant waste has been performed. The method depends on the adsorption of organic compounds in the active carbon and their desorption by allyl chloride. Ally1 chloride is desorbed by steam. After desorption the solutions are recirculated to the epichlorohydrin plant.

Individual sodium salts of branched perfluorocarboxylic acids, (CF,),CF(CF,CF,),COONa, and their analogs containing one chlorine atom, CF,CF(CF,CI)(CF,CF,)nCOONa, were synthesized by telomerization of 2-iodoheptafluoropropane and I-chloro-2-iodohexafluoropropane with tetrafluoroethene, the addition of ethylene to both types of iodides considered, HI elimination and the oxidation of perfluoroalkylethylenes with potassium bichromate. The surface tension measurements demonstrated the high surface activity of sodium salts containing 9 and 11 carbon atoms in the hydrophobe. Perfluorocompounds were more surface active than their analogs having one chlorine atom but the differences were not great.

Amine‐type surfactants containing fluorocarbon hydrophobes were synthesized and used to study their adsorption at water/air interfaces. They exhibit a high surface activity and decrease both effectively and efficiently the surface tension of their aqueous solutions. They are able to decrease the surface tension to about 20 mN m−1.

Dehydrochlorination of an aqueous solution of propylene chlorohydrin with sodium hydroxide (12.5 and 302) by weight), with catholyte (5 or 10% by weight NaOH + 142, by weight NaCI) and with milk of lime (15% by weight)were compared. The use of catholyte (10% by weight NaOH + 14% by weight NaCI) enables propylene oxide to be obtained in a yield of 94.3"/;, with 100% conversion of chlorohydrin. The concentration of 1,2-propylene glycol in the waste is 0.07") by weight.