Preliminary Study On Catalyst Of Citral MPV Reduction

In this works, some investigation was done in order to find out effective oxide catalyst for citral MPV reaction route which could transform citral into geraniol and nerol. These inverstigation included: 1) ZrO₂/γ-Al₂O₃ and ZrO₂/SiO₂ samples were preparaed usingγ-Al₂O₃ and SiO₂ as support by immersion method. 2) The catalytic property of ZrO₂/γ-Al₂O₃ and ZrO₂/SiO₂ samples was tested when MPV reaction of citral to geraniol and nerol was selected as model reaction. 3 )For ZrO₂/SiO₂ sample, effect of calcination temperature on their catalytic property was tested by using the model reaction. 4) Effect of reaction conditions (reactant alcohol/citral ratio, solvent and reaction temperature) on result of the model reaction was inverstigated initially.Some obtained results from the experiment above was given as follow:1. ZrO₂/SiO₂ samples showed better catalytic activity than ZrO₂/γ-Al₂O₃ samples in citral MPV reaction.2. The experiment conditions of model reaction was obtained initiallyby using 6.37wt.% ZrO₂/SiO₂ as catalyst. Those included that reaction temperature was 100℃, solvent was toluene and reactant isopropanol/citral ratio was 3:1-5:1.3. When ZrO₂ content on SiO₂ was 6.37wt.% for ZrCVSiO₂ samples, the catalytic activity of the sample was the highest for the model reaction, conversation percent of citral was 89% and selectivity percent of geraniol and nerol was 89% too.4. For ZrO₂/SiO₂ samples, spectra data of NH3-IR determined that there was a few B acid site on ZrO₂/SiO₂ sample. XRD data determined that ZrO₂ on SiO₂ was amorphous phase when ZrO₂/SiO₂ samples were calcinated at 350℃for 24h.5. The result on recycle use test for ZrO₂/SiO₂ catalyst showed the sample could recycle use.