According to the number of hydroxyl groups in molecular, the alcohol can be divided into alcohol, glycol and polyols. Two hydroxyl alcohol of molecule is called dibasic alcohol. All alcohol is the same. They can react with organic acid or inorganic acid to form ester. Nitrile is a kind of organic matter containing organic groups-CN. Nitrile can be obtained through the nucleophilic substitution reaction of potassium cyanide and halogenated in water or similar chemical characteristics water solution. 

 

The effect of material loss of electronic called oxidation reaction. Oxidation reaction in its narrow sense refers to the material with oxygen. Oxidation value increases when the oxidation. Oxidation is also called oxidation reaction. The oxidation is a significant reaction in organic chemistry and a core technology for conversion of hydrocarbon to intermediate of organic synthesis. In order to realize clean production, the studies on green oxidant and oxidation process have become the common ground of academia and industry. Hydrogen peroxide is safe, no poisonous, low price, thus is an ideal oxidant.

 

In the article the oxidations of diols and nitrils catalyzed by sodium tungstate, sodium molybdate and heteropoly acid using H202, Na2C03-H202, and sodium percarbonate as oxidant was studied.

1.The results of catalytic oxidation of l, 2-propanediol and butanediol using sodium tungstate as catalyst and hydrogen peroxide (30%) as oxidant showed that the conversion of substrate increased with the increase of reaction time and temperature, but the selectivity forming hydroxyketone decreased. 

2.The increase of amount of catalyst or oxidant would lead to the formation of more by-products acetic acid and formic acid. The increase of acidity of the auxiliary additive would be favorable for the conversion of l,2 propanediol. But the selectivity forming hydroxyacetone decreased. 

3.When Na2W04 was used as catalyst under the optimized reaction conditions: temperature is 55℃, time is 60 min, n(sodium tungstate)/(2-hydroxyl phenol)=1, the conversion of l,2-propanediol was 13% and the selectivity of hydroxyacetone could achieve 92.3%. Under similar conditions, the conversions of l,2-butanediol and l,3-butanediol were29.2% and77.5%, and the selectivities forming l-hydroxyl-2-butanone and 4 hydroxy-2-butanone were 65.8 % and 85.3% respectively. 

 

The mechanism of diol oxidation was discussed.The preparation of amides from aryl nicriles and aliphatic nitriles was studied in the presence of sodium tungstate catalyst using sodium percarbonate or sodium carbonate-hydrogen peroxide as oxidant in the solution of methanol and water mixture. The results indicated that aryl nitriles and aliphatic nitriles could transfer to aryl amides with very high selectivity of 95%-100% at room temperature. The comparing study of two oxidants suggested that when sodium carbonate-hydrogen peroxide was used as oxidant, the oxidation rate of nitrile and the selectivity forming amide were better than that percarbonate was used.