This technique pro-duced not only N-phosphonomethyliminodiacetic acid with high quality but also a great deal of chloromethane by the hydrolyzation of dimethyl phosphite and methylal.

The chloromethane-containing waste gas was treated by catalytic oxidation process and the affecting factors were studied.

The synthesis of 1,2-dimethoxybenzene from chloromethane combined with pyrocatechol is introduced in this artcile.

The design of a computer integrated control system for the continuous recovery process of methyl chloride and its application;

Meanwhile,the factors which affected the drying were also analyzed including the flow rate of methyl chloride,the content of isobutylene,the amount of regenerated nitrogen,the regeneration time,the discharging condition of methyl chloride remaining in tower before regeneration,the using time of Al_2O_3,and so on.

Through drying the methyl chloride drying tower, analyzing the bed temperature profile on regeneration process and comparing the theoretical cycle and actual cycle, this paper gave the proper operation cycle and improving suggestions for drying tower operation.

Detection of Chloroform in aqueous solution by Colorimetric tube headspace gas chromatography;

Study on the Method for Determination of Micro and Trace Chloroform and Carbon Tetrachloride in Water by Static Headspace Gas Chromatography;

Research of controlling chloroform in drinking water using chlorine dioxide disinfection;

Determination of Trichloromethane in Wastewater with Liquid-liquid Extraction/Gas Chromatography;

Determination of Time Weighted Average Concentration for 1,2-Dichloroethane,Trichloromethane and Carbon Tetrachloride in the Air of Workplaces;

Producing dichloromethane and trichloromethane by combined adsorptive separation technology of heat-chlorinating methane;

Polyester nanofiber can be prepared by electrospinning process from PET chips separately dissolving in three kinds of solvents,namely,the mixture solvent of phenol and tetrachloroethane,trifluoroacetic acid and the mixture solvent of trifluoroace- tic acid and dichlormethane.

A capillary GC method with FID detector for the determination of residual organic solvents acetone, dichlormethane and pyridine in nateglinide was presented.

Results After 18 weeks,the number of cancerous node of the AGE groups including the Extract from the leaves and the part of dichlormethane from the seeds was signif.

Discussion on factors influencing use ratio of methanol in methane chloride production;

Methylcyclopentadiene was synthesized from cyclopentadiene,metallic sodium and methane chloride by a two-step method,which included synthesis of cyclopentadiene sodium by reaction of cyclopentadiene with metallic sodium and successive methylation of cyclopentadiene sodium with methane chloride.

The outlets of methane tetrachloride produced in the production facilities of chloromethane in China at present were proposed,such as conversion to diphenyl ketone,ethylene tetrachloride,cinnamic acid,trichloroacetyl chloride,methane chloride and chloroform.