Mild pyrolysis of phosalone

Thermal degradation of chlorophenoxy acid herbicides

“…The thermal behavior of organic pesticides has already been investigated, especially for the disposal of waste pesticides by incineration (McPherson and Johnson, 1956; Kennedy et al, 1972;Holloman et al, 1976;Ahling and Wiberger, 1979). In previous papers, we gave the results of our work on the thermal degradation of diuron and iprodione (Gomez et al, 1982a), oxadiazon (Gomez et al, 1982b), and phosalone (Bruneau et al, 1986). The present investigation deals with the analysis of the products resulting from pyrolysis in an atmosphere of helium of three widely used chlorophenoxy acid herbicides [(2,4-dichlorophenoxy)acetic acid (2,4-D), (2,4-dichlorophenoxy)propionic acid (2,4-DP), (2-methyl-4-chlorophenoxy)acetic acid (MCPA)] in the range 200-1000 °C.…”