Catalyst and method for preparing beta-phenylethanol by using same

Abstract

The invention discloses a catalyst and a method for preparing beta-phenylethanol by the catalyst. The catalyst is a nickel-copper silicate composite echinus-shaped reactor type nanocatalyst. Accordingto the catalyst, the problem that the content of a byproduct, i.e., ethylbenzene is high due to the fact that a hydrogenation reaction speed of styrene oxide is too high and the supply of hydrogen isinsufficient is solved, the beta-phenylethanol can be prepared from the styrene oxide under mild conditions through high-selectivity and high-yield hydrogenation, the conversion ratio of the styreneoxide is higher than 99%, the selectivity of the beta-phenylethanol is not lower than 99.5%; and due to sufficient hydrogen supply, the high selectivity of the product can also be guaranteed under thecondition that hydrogenation of the styrene oxide is carried out in the absence of auxiliaries, the procedure of removing the auxiliaries is avoided, and product separating flows are simplified. Themethod for preparing the beta-phenylethanol can achieve continuous production of the beta-phenylethanol, and the production efficiency is increased greatly.

Description

Technical field [0001] The invention relates to a catalyst for the hydrogenation of styrene oxide to prepare β-phenylethanol, in particular to a nickel silicate-copper composite sea urchin-like nano-reactor type catalyst, and a method for preparing β-phenylethanol using the catalyst. Background technique [0002] β-Phenylethanol (PEA), also known as 2-phenylethyl alcohol, phenylethyl alcohol, and ethyl phenylethyl alcohol, is a simple primary aromatic alcohol. It is a colorless liquid at room temperature and has a delicate, delicate and long lasting rose aroma. It was first discovered as a characteristic aroma compound in plant flowers and naturally exists in neroli oil, rose oil, geraniol oil and other aromatic oils. [0003] β-Phenylethanol is widely used in various edible flavors and tobacco flavors because of its soft, pleasant and long lasting rose aroma. It is the main raw material for the preparation of rose-flavored food additives and rose-flavored flavors. The use of β-ph...

AI Technical Summary

Problems solved by technology

The β-phenylethanol preparation processes proposed by patents CN1111169A, US6979753, US4943667, US2524096, etc. all require the use of solvents, which reduces production efficiency, complicates the product separation process, and increases the cost of solvent removal, etc.

[0006] To sum up, the existing technologies all have certain deficiencies to varying degrees. If additives need to be added to improve selectivity, but at the same time cause problems such as reduced catalyst life, difficult product separation, and even affect product quality; such as catalyst structure and Poor performance, which leads to easy deactivation of the catalyst and short catalyst life; if a solvent is required due to the heat transfer limitation of the reactor, the separation cost is increased

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