“…and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). radiation source (Ramage andEckert, 1975, 1979), the photochlorination of trichloroethylene in a stirred tank reactor irradiated from the outside by eight UV sources parallel to the reactor axis and• equally spaced one from the other (Gebhard, 1978), and the chlorination of toluene in an annular reactor of the bubbling column type with the lamp located at the axis (Yokota et al, 1981b(Yokota et al, , 1983). In the present work, a semibatch stirred tank reactor irradiated from the bottom by a UV source located at the focal axis of a cylindrical reflector of parabolic cross section has been used.…”