Fouling and cleaning of Nafion membrane in direct electrochemical synthesis process of p-aminophenol;
对氨基酚直接电还原合成过程中Nafion膜的污染与清洗再生
The effects of reaction temperature,reaction time,raw material ratio, dosage of catalyst on the synthesis were studied,and the proper technological conditions were given as follows:the re- action temperature 85℃,reaction time g hours,n (p-aminophenol):n (bromobutane)= 1:1.
在相转移催化剂存在下,以对氨基苯酚、溴代正丁烷为原料合成对氨基苯丁醚,研究了反应温度、反应时间、原料配比、催化剂用量等条件对合成反应的影响,得出合成对氨基苯丁醚的最佳工艺条件是:反应温度85℃,反应时间8 h,n(对氨基苯酚):n(溴代正丁烷)=1:1。
Paracetamol, caffeine, aspirin, salicylic acid and p aminophenol had a good linearity in the concentration range of 0.
建立了一种 HPL C方法 ,同时测定解热止痛散中对乙酰氨基酚、咖啡因和阿司匹林的含量以及相关杂质水杨酸和对氨基酚的含量。