Determination of 75% Clopyralid Water Soluable Granule by RP-HPLC;

Treatment of clopyralid production wastewater by resin adsorption process;

The Residual Dynamics in Oilseed and Soil and Adsorption Study of Clopyralid;

3-Methoxyl-5-chloro-2,6-dinitropyridine was synthesized from 3,5-dichloropyridine by substitu- tion and nitration,and characterized by single crystal X-ray diffraction analysis,IR,~1H NMR,MS spectra and elemental analysis.

3-Methoxy-5-chloro-2,6dinitropyridine(the compound Ⅲ) was synthesized from 3,5-dichloropyridine by substitution and nitration.

2,6-dichloropyridine was synthesized from chlorination of pyridine under UV irradiation with chlorine, and then acidity hydrolyzed with the medium of H2O and the condition of bringing pressure to obtain 6-chloro-2-pyridinol with 85% yield.

Using 2,6-dichloropyridine as material,through a nucleophilic reaction and an electrophilic reaction,3,5,6-trichloro-2-pyridinol with a high yield of 89% was synthesized by using FeCl_3/I_2 as catalyzer.

Several synthesis routes of 2,3-dichloropyridine were evaluated in this paper,and therefore an economic and reasonable one-pot synthesis of 2,3-dichloropyridine was explored through chlorination,diazotization and sandmeyer reaction starting with 3-aminopyridine yield and purity of the product was 66.