摘要
ＣｕＯ＋ＮｉＯ／分子筛催化剂于不同还原温度下，对正丁醇与氨一步催化合成正丁胺的反应，具有不同的反应活性。利用ＸＲＤ考察在不同还原温度下ＮｉＯ、ＣｕＯ在分子筛载体上的还原状态。ＮｉＯ在２７０℃以上可还原为ＮｉＯ；ＣｕＯ在２４０℃以上可还原为ＣｕＯ。并且由焙烙烧前后的ＸＲＤ图，比较ＮｉＯ、ＣｕＯ的自发分散的趋势。ＣｕＯ自发分散倾向大于ＮｉＯ，Ｎｉｏ主要仍以结晶态存在，较易于还原。
The reaction activity of CuO + NiO/molecular sieve catalyst for the synthesis of n-butylamine from n-butyl alcohol and ammonia differs under different reduction temperatures.By using XRD,the authors discuss the reduction state of NiO and CuO on molecular sievesupports under different reduction temperatures.NiO can be reduced to Ni￣0 at temperaturesover 270℃,CuO can be reduced to Cu￣0 at temperatures over 240℃. By comparison of XRDdiagrams before and after calcination,we discover that the tendency of spontaneous dispersion of CuO is much stronger than that of NiO,and that NiO mainly exists in the crystallinestate,which makes it easy for reduction.
出处
《石油化工》
CAS
CSCD
北大核心
1994年第5期290-293,共4页
Petrochemical Technology
关键词
分子筛催化剂
正丁胺
催化活性
X ray diffraction,reduction,spontaneous dispersion,crystallin state
