Monocyclic terpene high-yield alpha-pinene isomerization catalyst and preparation method

Abstract

The invention discloses an Alfa-pinene isomerization catalyst to improve the single ring terpene yield and a preparation method thereof. The composition of the catalyst is as follows: the mass ratio of zirconia and neodymium oxide is 1:0.03 to 0.09. The catalyst has the preparation method that a mesoporous alumina is adopted as a basic carrier, to prepare the loaded nano composite carrier by directly synthesizng mixture composed of nano zirconia and the neodymium oxide on the surface of the carrier by an immersion method, and to process the composite carrier by adopting an ultrasonic wave and microwave drying technique; the solid acid catalyst, applied to the Alfa-pinene isomerization reaction, is made from the loaded composite carrier SO4<2->. Results show that the conversion rate of the Alfa-pinene is over 98 percent, the single ring terpene accounts for more than 60 percent of an isomerization product. The Alfa-pinene isomerization catalyst has low cost and is pollution-free for the environment and equipment; besides, the prepared catalyst has high activity, high selectivity and high stability.

Description

technical field

[0001] The invention relates to the field of catalytic materials and heterogeneous catalysis, in particular to the composition and preparation method of a catalyst for improving the yield of monocyclic terpene in α-pinene isomerization reaction. Background technique

[0002] α-pinene is the main component in turpentine oil, and the content of α-pinene in general turpentine oil is more than 65%. Utilizing the chemical properties of α-pinene, it can be oxidized, polymerized, isomerized and other series of deep processing to develop fine chemical products or chemical intermediates with high added value. Among them, the isomerization of α-pinene is a beneficial way for deep processing of turpentine. At present, the main obstacle restricting the industrialization of α-pinene isomerization is the isomerization catalyst. Judging from the current research status, catalysis scholars have mostly studied zeolite molecular sieves, SO 4 2- / M y o x Type solid acid an...