nature
3,4-Chloronitrobenzene is prepared by mixing p-chloronitrobenzene with an appropriate amount of catalyst anhydrous FeCl3, and passing chlorine gas through the chlorination reaction at a certain temperature. The nitro compound is reduced to obtain 3,4-=chloroaniline. The obtained 3,4-=chloroaniline was added dropwise to the phosgene-saturated toluene solution, and the reaction was carried out to obtain 3,4-=chlorophenyl isocyanate. Finally, 3,4-=phenylchloroisocyanate reacts with dimethylamine to obtain diuron.
use
Instead of urea herbicides, it has a systemic effect and a certain contact killing effect. Plant roots or leaves absorb and inhibit photosynthesis, resulting in chlorosis of leaves, fading of leaf tips and edges. At low doses, diuron can be selected for weeding by the time difference and time difference. In high doses it becomes a biocidal herbicide. Mainly used for cotton, soybean, tomato, tobacco, strawberry, grape, orchard, rubber plantation and other crops to control annual grass weeds. Such as barnyardgrass, crabgrass, foxtail, wild amaranth, sedge and so on.