4-Nitrobenzoic acid

Preparation or 4-Nitrobenzoic Acid by Liquid Phase Catalytic Oxidation

液相催化氧化法制备对硝基苯甲酸

But one of the main components , 4-nitrobenzoic acid , has no degrading tendency .

但对废水中另一主要成分对硝基苯甲酸降解不明显。

4-Nitrobenzoic acid was prepared in 75 % yield by manganese sulfate catalyzed liquid phase oxidation of 4-nitrotoluene with oxygen .

以硫酸锰作催化剂液相条件下用氧气氧化对硝基甲苯，生成对硝基苯甲酸，收率75%。

The purified 4-Nitrobenzoic acid [ pNBA ] was produced by re-crystallization the crystals , and neutralization the solution of refined sodium salt of pNBA . The purity of pNBA was more than 99 % , and the yield was about 72 % .

将废渣溶解于碱溶液中，通过析晶分离得对硝基苯甲酸钠盐，经重结晶精制后中和得纯度99%以上的对硝基苯甲酸，收率在72%左右。

Tetraphenylporphyrin ( TPP ) is synthesized successfully by using 4-nitrobenzoic acid as the catalyst and xylene as the solvent based on Adler . Ethyl 4-nitrobenzoate (ⅰ) was prepared in 81.1 % yield by reaction of 4-nitrobenzoic acid with anhydrous ethanol in the presence of 98 % sulfuric acid .

在四苯基卟啉的合成中，对Adler法进行了改进，采用对硝基苯甲酸代替丙酸作催化剂，并采用二甲苯为溶剂，通过分水，成功合成了四苯基卟啉。