Catalyst for synthesizing pinane by hydrogenating alpha-pinene and preparation method

Abstract

The invention discloses a catalyst for synthesizing pinane by hydrogenating alpha-pinene and a preparation method. The catalyst comprises the following components by mass percent: 15-20% of amorphous-state NiB alloy, 20-30% of ZrO2 and 50-65% of Al2O3. The preparation method comprises the following steps: combining a supported nano ZrO2 / Al2O3 composite carrier with the amorphous-state NiB alloy; fully utilizing the surface property of the composite carrier and the amorphous-state hydrogenation activity; and directly preparing the amorphous-state NiB alloy on the ZrO2 / Al2O3 composite carrier to form a dual-function NiB / ZrO2 / Al2O3 catalyst. The catalyst is also used for synthesizing the alpha-pinane by hydrogenating the alpha-pinene. The invention has easily obtained raw materials and simple preparation process; and the hydrogenation product, namely the pinane is a transparent oily liquid with mild pine needle smell which can derive twenty to thirty terpene spices, and is a main raw material for synthesizing spices and medicine intermediates such as dihydromyrcene, linalool, citronellol, citronellal and the like.

Description

technical field [0001] The invention relates to the field of catalytic materials and heterogeneous catalysis, in particular to a catalytic hydrogenation synthesis of α-pinene-supported amorphous alloy NiB / ZrO using α-pinene as a raw material 2 / Al 2 o 3 The catalyst composition, preparation method and hydrogenation process conditions under the action of the catalyst. Background technique [0002] The hydrogenation of α-pinene is an important reaction in the fine chemical industry. The hydrogenation product, pinane, is a transparent oily liquid with a mild pine needle-like smell, which can be derived from twenty or thirty kinds of terpene fragrances. It is a synthetic fragrance and medicine. Main raw materials for intermediates such as dihydromyrcene, linalool, citronellol and citronellal. The research on the hydrogenation of α-pinene to pinane has been paid attention to by people for a long time, and catalysts such as platinum carbon, palladium carbon, and Raney Ni are us...

AI Technical Summary

Problems solved by technology

However, these catalysts have certain shortcomings. Catalysts such as platinum carbon and palladium carbon are expensive, and industrialization is limited.

When Raney nickel is used as a catalyst for the hydrogenation of pinene, the hydrogenation pressure is high, the operating conditions are harsh, and the safety and reliability are poor; and the investment in high-pressure equipment is large, it is easy to leak, the operating cost is high, and it is difficult to scale up. It is of great practical significance to realize the hydrogenation of α-pinene under high pressure

Due to their unique structural characteristics, amorphous alloys show excellent performance in the field of catalysis, especially in the hydrogenation reaction, which may replace the pollution of the environment during the preparation process, and the use of unsafe framework nickel or even precious metal catalysts, thus causing It has attracted people's attention, but the thermal stability of amorphous alloys is poor, and it will crystallize above 300 °C