摘要
采用釜式反应器,在无溶剂条件下考察了金属Pd的负载量、催化剂粒度、载体预处理方式和反应温度等因素对Pd/C催化剂6,10,14-三甲基-13-烯-2-十五烷酮（FA-4H）选择性加氢性能的影响规律。实验结果表明：随着Pd负载量的增加,Pd/C催化剂FA-4H加氢的活性逐渐增加;当Pd负载量在0.5%~3.0%（wt）,FA-4H完全转化时目标产物六氢法呢基丙酮（PA）的选择性为99.3%~99.5%。较小的催化剂粒度对应较短的催化剂孔道,有利于减少产物PA在催化剂孔道内停留的时间,从而在一定程度上防止了C=O双键的过度加氢。此外,活性炭载体的硝酸或氨水预处理、较低的反应温度等也有利于减少Pd/C催化剂上FA-4H完全转化时加氢副产物6,10,14-三甲基-13-烯-2-十五烷醇（FA-alcohol）和6,10,14-三甲基-2-十五烷醇（PA-alcohol）的生成量,从而使目标产物PA的选择性接近100%。
In this paper,effects of palladium loading,catalyst granularity,pretreatment method of support and reaction temperature on the hydrogenation reduction of 6,10,14-trimethyl-13-ene-2-pentadecanone（FA-4H） over Pd/C catalyst were investigated under solvent-free condition in a batch reactor.The experimental results show that the activity of Pd/C catalyst for FA-4H hydrogenation increases with increasing the palladium loading;99.3%~99.5% selectivity towards hexahydrofarnesylacetone（PA） is obtained when Pd loading is in the range of 0.5%~3.0%（wt）.The catalyst with smaller granularity possesses shorter pore channel which would contribute to deducing the retention time of PA inside the pore channel of catalyst particles,and to some extent preventing the over-hydrogenation of C=O double bond in the FA-4H.In addition,pretreatment of active carbon support with nitric acid or aqueous ammonia solution,and low reaction temperature are also favorable for decreasing the content of byproducts such as 6,10,14-trimethyl-13-ene-2-pentadecanol（FA-alcohol） and 6,10,14-trimethyl-2-pentadecanol（PA-alcohol） and improving correspondingly the selectivity towards PA.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2013年第1期71-75,共5页
Journal of Chemical Engineering of Chinese Universities
基金
浙江省教育厅科学研究基金(Y201018517)
