Formation of environmentally friendly chloroorganic compounds technology by sewage and by-products utilization

Jerzy Myszkowski,Waldemar Paździoch,Eugeniusz Milchert,Robert Pełech

doi:10.2478/v10026-007-0069-9

Abstract

Formation of environmentally friendly chloroorganic compounds technology by sewage and by-products utilization The processes presented in the study enables the separation and disposal of the chloroorganic compounds as by-products from the vinyl chloride plant by using the dichlorethane method and also from the production of propylene oxide by the chlorohydrine method. The integrated purification method of steam stripping and adsorption onto activated carbon allows a complete removal and recovery of the chloroorganic compounds from waste water. Waste distillation fraction is formed during the production of vinyl chloride. 1,1,2-trichloroethane separated from the above fraction, can be processed to vinylidene chloride and further to 1,1,1-trichloroethane. 2,3-Dichloropropene, 2-chloroallyl alcohol, 2-chloroallylamine, 2-chlorothioallyl alcohol or bis(2-chloroallylamine) can be obtained from 1,2,3-trichloropropane. In the propylene oxide plant the waste 1,2-dichloropropane is formed, which can be ammonolysed to 1,2-diaminopropane or used for the production of β-methyltaurine. Other chloroorganic compounds are subjected to chlorinolysis which results in the following compounds: perchloroethylene, tetrachloromethane, hexachloroethane, haxachlorobutadiene and hexachlorobenzene. The substitution of the milk of lime by the soda lye solution during the saponification of chlorohydrine eliminates the formation of the CaCl2 waste.

Highlights

In the processes of the great organic synthesis next to the usable products a lot of by-products are formed
They are obtained from the system as the wastes or in the form of sewage. Those compounds in most cases are burnt or put to a destructive oxidation. Such action leads to the loss of the valuable raw materials and in the case of burning of the chloroorganic compounds to the emission of dangerous dioxins
This article presents the suggested methods of the separation and disposal of chloroorganic compounds from the sewage and wastes formed during the production of vinyl chloride by using the dichloroethane method, propylene oxide by using the chlorohydrin method and epichlorohydrin from allyl chloride

Summary

Introduction

In the processes of the great organic synthesis next to the usable products a lot of by-products are formed. They are obtained from the system as the wastes or in the form of sewage. This article presents the suggested methods of the separation and disposal of chloroorganic compounds from the sewage and wastes formed during the production of vinyl chloride by using the dichloroethane method, propylene oxide by using the chlorohydrin method and epichlorohydrin from allyl chloride.

Results

Conclusion