1 results about "Phase method" patented technology

The invention discloses a novel method for preparing chlorpyrifos by using 3,5,6-trichloropyridine-2-sodium alkoxide and O,O-diethyl thiophosphoryl chloride as main raw materials. The novel method disclosed by the invention mainly comprises the following steps of: based on water as a medium, adding reactants by times; forming a high dispersion system under the effect of a compound catalyst to carry out reaction, wherein the reaction time is greatly shortened; and carrying out simple separation and purification to obtain the target product chlorpyrifos. The novel method disclosed by the invention is environment-friendly; a synthesis method is simple; water-phase method chlorpyrifos synthesis can be efficiently carried out through simple process operation and the obtained product has high purity and high yield; and therefore, the novel method is applicable to large-scale industrial production.