摘要
研究了含铬分子筛催化环己基过氧化氢分解制备环己酮(醇)的反应。结果表明,在分子筛质量分数为1％、常压、80℃、反应1 h的条件下,Cr-Silicalite-1和Cr-APO-5分子筛催化分解转化率分别达到96．7％和86．8％,环己酮和环己醇总选择性分别为113．4％和117．9％。铬流失是造成含铬分子筛不可逆失活的原因,分子筛骨架中高度分散的六配位铬原子具有较好的催化活性和稳定性。
Cyclohexyl hydroperoxide （CHHP） decomposed to cyclohexanone and cyclohexanol was studied over chromium containing molecular sieve catalysts. Under the reaction conditions of a reaction temperature of 80 ℃, a reaction time of 1 h, with 1% catalyst in the reaction system and under atmospheric pressure, the decomposition conversions of CHHP over Cr-Silicalite-1 and Cr-APO-5 were 96.7% and 86.8%, respectively; the total selectivity for cyclohexanone and cyclohexanol over Cr-Silicalite-1 and Cr-APO-5 were 113.4% and 117.9%, respectively. The irreversible deactivation of these catalysts was due to the leaching of chromium atoms from the catalyst. Chromium atoms dispersed in the molecular sieve framework having a coordination valence of 6 possessed desired catalytic activity and stability.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2006年第1期8-12,共5页
Petroleum Processing and Petrochemicals
基金
国家重点基础研究发展规划(973)项目课题(G2000048005)。
关键词
铬
分子筛
催化剂
环己基过氧化氢
分解
chromium
molecular sieve
catalyst
cyclohexyl hydroperoxide
decomposition
