Utilization of waste chloroorganic compounds

Abstract

Efficient methods of utilization of waste chloroorganic compounds coming from waste water and the waste streams formed e.g. in the production of vinyl chloride by dichloroethane method and in the production of propylene oxide by chlorohydrin method have been presented. First the separation of chloroorganic wastes by the adsorption methods has been described in the article. Three valuable methods of chlorocompounds utilization have been then discussed. The first one is isomerization of 1,1,2-trichloroethane to 1,1,1-trichloroethane as the valuable product with less toxicity than a substrate. The second method is ammonolysis of waste 1,2-dichloropropane and 1,2,3-trichloropropane. The third described method is chlorolysis. This method can be used for the utilization of all types of waste chloroorganics.

Extraction of iron-containing catalyst from chlororganic wastes generated by ethylene chlorination

“…It is known [2] that OCWs are formed in the production of vinyl chloride, as well as propylene oxide by the chlorohydrin method. According to the works [2][3][4], which are somewhat different from each other, the OCW composition formed during the rectification of DCE includes two main components: DCE -18-30 % and 1,1,2-trichloroethane -30-40 % and in smaller amounts of 1,1-dichloroethane -7-10 %; perchlorethylene -3-5 %; 1,2-dichloroethylene -2-3 %; benzene -up to 0.5 %, as well as other organochlorine compounds. The content of the main components in various flows of OCW from the distillation process is given in [2].…”

“…OCWs are of course utilised of by burning or destructive oxidation in the case of wastewater, however, the economic efficiency of these utilisation methods is low, since valuable chemical products are lost [2,3]. In addition, it was noted in [2][3][4] that hazardous compounds such as dioxins can be formed during the OCW combustion.…”