CAJ | 학술논문

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%.
채용부식반응기,재무용제조건하고찰료금속 Pd 적부재량、최화제립도、재체예처리방식화반응온도등인소대Pd/C최화제6,10,14-삼갑기-13-희-2-십오완동(FA-4H)선택성가경성능적영향규률.실험결과표명:수착Pd부재량적증가,Pd/C최화제FA-4H가경적활성축점증가;당Pd부재량재0.5%~3.0%(wt),FA-4H완전전화시목표산물륙경법니기병동(PA)적선택성위99.3%~99.5%.교소적최화제립도대응교단적최화제공도,유리우감소산물PA재최화제공도내정류적시간,종이재일정정도상방지료C=O쌍건적과도가경.차외,활성탄재체적초산혹안수예처리、교저적반응온도등야유리우감소 Pd/C 최화제상 FA-4H 완전전화시가경부산물6,10,14-삼갑기-13-희-2-십오완순(FA-alcohol)화6,10,14-삼갑기-2-십오완순(PA-alcohol)적생성량,종이사목표산물PA적선택성접근100%.
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.