Currently known synthetic methods for preparing Styrax mainly include: microbial fermentation, organic synthesis and other main methods.
Method 1: a preparation method of Styrax, said Styrax is prepared by heterogeneous hydrogenation reaction, comprising the following steps: raw material acetophenone, solvent water and catalyst are added in the reactor, and said catalyst is supported cobalt base catalyst or supported copper-based catalyst; seal the reactor, and replace it three times with nitrogen and hydrogen respectively; provide hydrogen source, control the pressure in the reactor to be 0.50～3MPa, and the stirring speed is 500～1000 rpm, at 70 Reaction at ~120°C for 2-10 hours, one-step reaction to obtain the α-phenethyl alcohol.
Method 2: a method for preparing α-phenylethyl alcohol with a magnesia/graphene hybrid material as a catalyst, the preparation method of the magnesia/graphene hybrid material catalyst comprises the following steps:
1) Preparation of graphene oxide suspension: take graphene oxide and disperse it in distilled water, and after ultrasonication for 1-3 hours, a brown-yellow graphene oxide suspension is obtained;
2) Preparation of magnesium salt solution: dissolving magnesium salt in distilled water to obtain a clear magnesium salt solution;
3) Preparation of magnesium hydroxide/graphene oxide: Dissolve ammonium bicarbonate in distilled water to make a clear ammonium salt solution, and add it to the graphene oxide suspension prepared in step 1), then add ammonia water and mix well to obtain Brown-yellow graphene oxide ammonium salt solution mixed solution; under stirring, the magnesium salt solution obtained in step 2) is dropped into the mixed solution drop by drop to obtain brown-yellow magnesium hydroxide/graphene oxide precipitate; after standing for 24 hours , placed in a water bath at 80-90°C and stirred for 4 h, filtered while hot, washed with distilled water until the filtrate was neutral, and the filter cake was exposed to the air for 24 h to obtain a gray magnesium hydroxide/graphene oxide powder cake;
4) Preparation of magnesium oxide/graphene hybrid material: place the magnesium hydroxide/graphene oxide powder cake obtained in step 3) in a drying oven at 100 °C for 24-28 h, and then roast in the air to obtain gray magnesium oxide/graphite ene hybrid materials.
Method 3: A preparation method of Styrax, the method is: under normal pressure, acetophenone is used as raw material, alcohol is used as hydrogen source, and supported alkaline earth metal oxide is used as catalyst, at a reaction temperature of 60-130°C After reacting for 1-10 hours, after the reaction is completed, the reaction solution is processed to obtain α-phenylethanol; the alcohol is C1-C7 aliphatic alcohol or C3-C7 alicyclic alcohol; the amount of the acetophenone and likewise alcohol is in between The percentage is 1:5 -30; the supported alkaline planet steel oxide is made up of a company in addition to an alkaline world metal oxide filled on the service provider, the alkaline world steel oxide is MgO, CaO, SrO or BaO, and the provider is triggered carbon, the loading amount of the alkaline earth steel oxide is 0.5-15wt% based upon the mass of the service provider.
