The synthesis ofp - Phenylenediamine was summarized and its route of industrialisation was discussed.
归纳了对苯二胺的各种制备方法,并讨论了其工业化的优劣.
The urine samples were collected at 7∶00,11∶00 and 15∶00, and were assayed by modified Aldridge ? s method ( pyridine - p - phenylenediamine mixture ) .
分别于7时 、 11时 和15时收集班前、班中和班末尿样.
Synthesis of o phenylenediamine from o nitroaniline by catalytic hydrogenation at lower pressure was studied.
以邻硝基苯胺为原料,采用低压催化加氢还原技术合成邻苯二胺.