用NC-Ⅲ型催化剂合成间苯二腈

Synthesis of Isophthalonitrile over NC-Ⅲ Catalyst

研究了氧比、氨比、反应温度、线速度及负荷对氨氧化制间苯二腈的ＮＣ－ Ⅲ催化剂性能的影响。在ｎ（ 间二甲苯）／ ｎ（ 氨）／ ｎ（ 氧） ＝ １／（６ ～８）／８ 、温度４１５ ～４２５ ℃、线速度０－２ ｍ／ｓ、负荷６０ ～９０ ｇ／（Ｌ·ｈ） 条件下，间苯二腈的摩尔收率达７８ ％ 。研究表明，ＮＣ－ Ⅲ催化剂适用于低氨比、高负荷条件下操作，是氨氧化制间苯二腈高性能的催化剂，可适用于间苯二腈生产装置。

The effects of oxygen ratio,ammonia ratio,reaction temperature and load on NC-Ⅲ catalyst for the synthesis of isophthalonitrile(IPN) were studied.The mol yield of IPN reaches 78% under the reaction conditions of n(m-xylene)/n(NH 3)/n(O 2)=1/(6～8)/8,415～425 ℃,0 2 m·s -1 and load 60～90 g/(L·h).The study shows that NC-Ⅲ catalyst is suitable to operation under low ammonia ratio and high load.The catalyst is a highly efficient catalyst for IPN by ammoxidation.