Rhone-Progil

Jean-Claude Strini

Jean-Raymond Costes

Serge Hardouin

An improved process for the production of 1,2-dichloroethane in which chlorine and ethylene are reacted in the liquid phase in the absence of light and in the presence of a Lewis acid catalyst wherein all of the chlorine used in the reaction and a fraction of the total ethylene within the range of 90 to 100 mole percent based upon the total chlorine are introduced to a first homogeneous agitated reaction zone, the products from the first zone are passed to a second homogeneous agitated reaction zone into which there is also introduced the remaining ethylene in countercurrent flow to the flow of the 1,2-dichloroethane, with the total amount of ethylene introduced not exceeding 102 mole percent of the total chlorine.

Process for the preparation of 1,2-dichloroethane in two reaction zones

A process for the continuous chlorination of ethylene in the liquid phase in the absence of light and in the presence of 1,2-dichloroethane and dissolved ferric chloride wherein the reaction is carried out in a homogeneous reaction zone in which the reaction medium contains dissolved chlorine in an amount within the range of 1 to 20 g per kg of liquid reaction mixture and in which the ratio R between the molar hourly flow rate of ethylene introduced to the homogeneous reaction zone and the molar hourly flow rate of ethylene which saturates the 1,2-dichloroethane contained in the reaction zone is within the range of 0 to 140.

Selective preparation of 1,2-dichloroethane

A process for converting trichloroethylene present in 1,2-dichloroethane by chlorination of the trichloroethylene in the liquid phase in the absence of light and in the presence of a Lewis acid catalyst wherein chlorine, 1,2-dichloroethane containing trichloroethylene and ethylene are introduced to a homogeneous reaction zone, with the mole ratio of ethylene to trichloroethylene being at least 50 and the mole ratio of trichloroethylene to chlorine being a maximum of 0.02.

Growing community of inventors

St-Auban, France

Jean-Claude Strini