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    • 7. 发明申请
    • PROCESS FOR THE PREPARATION OF GAMMA VALEROLACTONE FROM LEVULINIC ACID
    • 从精氨酸制备游离胆固醇酯的方法
    • WO2016135009A1
    • 2016-09-01
    • PCT/EP2016/053267
    • 2016-02-16
    • DSM IP ASSETS B.V.
    • GUIT, Rudolf Philippus MariaVARELA FERNÁNDEZ, Alejandro
    • C07D307/33
    • C07D307/33
    • The invention relates to process for the preparation of gamma valerolactone (GVL) from levulinic acid (LA), said process comprising a) subjecting LA to a hydrogenation reaction comprising hydrogen and a solid catalyst system comprising a metal and a support in the liquid phase, to yield a first reaction mixture comprising GVL, hydroxypentanoic acid (4HPA), and water; b) removing water from said first reaction mixture; and c) subjecting the mixture obtained in step b) to a further reaction under conditions suitable to convert said 4-HPA to GVL, to yield a further reaction mixture. Steps b) and c) can be integrated. Optionally, water can be removed from the further reaction mixture. The process may include recycling the – optionally at least partially dewatered - further reaction mixture back to to step (b). This is particarly advantageous when the first reaction mixture is low in, or even free of levulinic acid. Alternatively, the further reaction mixture or at least partially dewatered further reaction mixture can be submitted to a distillation step, whereby the distillate can be collected to recover GVL.
    • 本发明涉及从乙酰丙酸(LA)制备γ-戊内酯(GVL)的方法,所述方法包括a)使LA进行包含氢的氢化反应和包含液相中的金属和载体的固体催化剂体系, 得到包含GVL,羟基戊酸(4HPA)和水的第一反应混合物; b)从所述第一反应混合物中除去水; 和c)使步骤b)中获得的混合物在适于将所述4-HPA转化为GVL的条件下进一步反应,得到另外的反应混合物。 步骤b)和c)可以集成。 任选地,可以从另外的反应混合物中除去水。 该方法可以包括将任选地至少部分脱水的另外的反应混合物再循环回到步骤(b)。 当第一反应混合物低或甚至不含乙酰丙酸时,这是非常有利的。 或者,进一步的反应混合物或至少部分脱水的另外的反应混合物可以进行蒸馏步骤,由此可以收集馏出物以回收GVL。