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    • 5. 发明申请
    • CATALYZED HYDROXYLAMINE PREPARATION
    • 催化羟基胺的制备
    • WO2012143332A1
    • 2012-10-26
    • PCT/EP2012/056925
    • 2012-04-16
    • DSM IP Assets B.V.GROOTHAERT, Marijke Hilde LeenTINGE, Johan ThomasGUIT, Rudolf Philippus Maria
    • GROOTHAERT, Marijke Hilde LeenTINGE, Johan ThomasGUIT, Rudolf Philippus Maria
    • C01B21/14
    • C01B21/1418B01J21/08B01J23/44B01J23/54
    • Method for preparing hydroxylamine in a continuous process, comprising hydrogenating nitrate in a reaction zone comprising a liquid phase, a gas phase and a heterogeneous hydrogenation catalyst, in which reaction zone hydroxylamine and nitrous oxide (N20) are formed, characterized in that the nitrous oxide concentration in the gas phase, is monitored and is maintained within a pre¬ determined range by means of controlled addition of a promoter for the heterogeneous hydrogenation catalyst and/or controlled addition of further amounts of heterogeneous hydrogenation catalyst to the reaction zone until the total amount of catalyst present reaches a pre-determined upper limit; and then (i) withdrawing a fraction of the heterogeneous hydrogenation catalyst from the reaction zone; and (ii) adding one or more further doses of heterogeneous hydrogenation catalyst until the total amount of catalyst present is at most at said pre-determined upper limit; and (iii) optionally repeating steps (i) and (ii); a method for producing an oxime and a method for producing a lactam comprising said process for producing hydroxylamine.
    • 在连续方法中制备羟胺的方法,包括在包含液相,气相和异相氢化催化剂的反应区中使硝酸盐氢化,其中反应区羟胺和一氧化二氮(N 2 O)形成,其特征在于一氧化二氮 监测气相中的浓度,并通过控制加入非均相加氢催化剂的促进剂和/或向反应区域控制加入另外量的非均相氢化催化剂,将其保持在预定范围内,直到总量 的催化剂存在达到预定的上限; 然后(i)从反应区抽出一部分异相氢化催化剂; 和(ii)加入一种或多种另外的非均相氢化催化剂剂量,直到催化剂的总量至多在所述预定的上限值为止; 和(iii)任选地重复步骤(i)和(ii); 制备肟的方法和制备内酰胺的方法,包括所述羟胺的制备方法。
    • 8. 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。