Standard test method for 2 , 6 - di - tert - butyl - p - cresol and 2 , 6 - di - tert - butyl phenol in electrical insulating oil by infrared absorption 红外线吸收法测定电绝缘油中2 , 6 -二叔丁基对甲酚和2 , 6 -二叔丁基对苯酚的标准试验方法
N - phenyl - b - naphthylamine ( antioxidant d ) and 2 , 6 - di - tert - butyl - p - cresol ( anti - oxidant bht ) are the two kinds of antioxidant which are extensively used in our country . their standard reference materials can be used to rectify instruments and measure our analytical methods 防老剂d与bht标准物质可作为行业对其产品纯度检测的基准,用于校准测量仪器,评价测量方法的准确度,保证测量结果的准确性。
Synthesis methods for p - hydroxybenzaldehyde are reviewed and their advantages and disadvantages are briefly compared , to conclude that direct p - cresol oxygenation is a good method , with calm reaction , simple operation , high yield , high purity and little " three wastes " 叙述了对羟基苯甲醛的各种合成方法,并对各种方法的优缺点作了简要对比,认为对甲酚直接催化氧化法反应平稳、操作简单,收率和纯度高,三废量少,是一种很有前途的合成方法。