Synthesis of liquid menthol by hydrogenation of dementholized peppermint oil over Ni catalysts

Quimica nova

Marchi, Alberto J.¹  Yori, Juan C.¹  Manuale, Debora L.¹  Betti, Carolina¹  Romeo, Eva² 

[1] Concejo Nacional de Investigaciones Científicas y Técnicas, Santa Fe, Argentina;Universidad de Zaragoza, Zaragoza, España

关键词: selective hydrogenation;    liquid menthol;    Ni catalysts.;   

DOI  :  10.1590/S0100-40422010000600002

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Hydrogenation of(-)-menthone and (+)-isomenthone was studied at 2.7 MPa and 100 ºC. The objectivewas to produce a liquid menthol mixture rich in (-)-menthol from dementholizedpeppermint oil. Ni-based catalysts were tested and compared for this reaction:a) 6 and 12% Ni dispersed into a nonstoichiometric magnesium aluminate (Ni-Mg-Al)with spinel structure; b) Ni-Raney catalyst. Both types of catalysts were activefor (-)-menthone and (+)-isomenthone hydrogenation. Lower conversion but higherselectivity to (-)-menthol was obtained with Ni-Mg-Al catalysts. However, theyrapidly lost their activity. Instead Ni-Raney catalysts kept its original activityeven after several hydrogenation runs.

【 授权许可】

CC BY