Two main producing techniques of glyphosate were reviewed,and the improvement of glyphosate was introduced.

The feasibility of electrodialysis for the desalination of iron dextran and the design of electrodialysis devices were studied.The effect of electrodialysis desalination on produce quality,and the economic comparison between electrodialysis and ethanol desalination,were discussed.

The quantitative analysis of glyphosate and N-(phosphonomethyl)iminodiacetic acid was conducted using HPLC with potassium dihydrogen phosphate buffer solution as mobile phase, Hypersil SAX column, flow rate: 0.8 mL/min, using UV detector at 195 nm wavelength to quantitative analysis glyphosate and N-(phosphonomethyl)iminodiacetic acid at the same column. The results showed that linear correlation for glyphosate and N-(phosphonomethyl)iminodiacetic acid were 0.999 9 and 0.998 4, the standard deviation were 0.089 9 and 0.770 1, the variation coefficient were 0.162 0% and 0.966 0%, respectively.

The research progress of glyphosate production by the oxidation of N-(phosphonomethyl)iminodiacetic acid with oxygen or oxygen-containing gas as oxidizing agent in the presence of catalysts was reviewed.

glyphosate synthesis from N-phosphonomethyliminodiacetic acid(PmiDA) by oxidazing of oxygen along with the catallysis of activated carbon under the low pressure is studied.The results of the experiment show that when presure is 0.2 mPa,temperature is 80 °c,time is 100 min and the concetration of PmiDA is 15%,the yield of glyphosate can be up to 96%.

Through the removing of sodium ion in iminodiacetic acid disaduium salt by electiodialysis,high pure iminodiacetic acid was prepared.The average purity of product was 98.14%,the average yield was 93.52%.

Potassium iodate was synthesized by electrochemical method and the extend experimentation was studied. The total yield of potassium iodate was 97.5%,the purity was 100.2%(mass fraction),and the current efficiency was 97% under the optimum process conditions. Simple technology and no pollution were the advantages of this process.

The electrochemical reduction characteristic of borate for preparing sodium borohydride in the sodium hydroxide aqueous solution was inv estigated by a three-electrode cell system. The electrode activity of Ni, Cu-Hg and Ag was evaluated. The results shows that in cathode the electrochemical reduction of BO 2 - was an indirect reduction process. The characteristics of cathode reaction is electrochemical reduction of H2O; negative ion BO 2 - was indirect reduced because of electron repelling effect. We discovered that when electrode was input some positive pulse generated from pulse power , the negative ion can be absorbed on the cathode surface so that the reducing reaction is direct.

以镍为阴极,铅为阳极,乙醇作助溶剂,NH4Cl作支持电解质,在近中性的溶液中电解硝基苯制备苯基羟胺,然后将苯基羟胺经Bamberger重排制备对氨基苯酚.讨论了各种反应条件对对氨基苯酚产率的影响.

The reorganization of N-hydroxy-benzenanine was studied in solutions of hydrochloric acid, sulphuric acid and phosphoric acid by spectrophotometry. The reorganization proportion of N-hydroxybenzenanine to p-aminophenol increases with temperature and acid concentration of the solutions. It cannot reorganize completely to p-aminophenol in hydrochloric acid solution, and the reorganization efficiency of phosphoric acid is superior to that of hydrochloric acid and sulphuric acid. The reorganization proportion reached 100% in phosphoric acid solution under conditions of [H +]=0.6 mol/L, 75 °C and reacting for 30 min.