| abstract |
The invention provides a method for recycling pendimethalin high-boiling raffinate. The method can recover pendimethalin after treating the raffinate. The carbon black and the solvent are put into the container according to the mass ratio of 1:0.3~0.8:0~3:0.9~1.3 and mixed; then add the acid solution to the container, wherein the high boiling point residual liquid of pendimethalin and the acid solution are mixed. The mass ratio is 1:0.6~1; stirring at a temperature of 45-55 ℃ for 12-18 hours, cooling to room temperature, the product is crystallized, filtered to obtain pendimethalin solid, vacuum-dried, and the filtrate is distilled and recovered solvent. |