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    • 3. 发明申请
    • PROCESS FOR THE WORKING-UP OF A VITAMIN E- AND VITAMIN E-ACETATE-CONTAINING MIXTURE OR PRODUCT STREAM
    • 维生素E和维生素E含乙酸酯混合物或产品流程的工作过程
    • WO2006018310A2
    • 2006-02-23
    • PCT/EP2005/008982
    • 2005-08-19
    • DSM IP ASSETS B.V.PIETZONKA, WernerRUCKSTUHL, PeterWILDERMANN, Angela
    • PIETZONKA, WernerRUCKSTUHL, PeterWILDERMANN, Angela
    • C07D311/72B01D3/14F25J3/02
    • C07D311/72
    • The invention relates to a process for the working-up of a vitamin E (VE)- and/or vitamin E acetate (VEA)-containing product stream, which is substantially characterized by purification of a vitamin E-containing product stream, acetylation of at least a part of the purified vitamin E and purification of at least a part of the acetylated vitamin E, the purification of vitamin E and vitamin E acetate preferably being effected by distillation, for example rectification. A preferred process according to the invention is characterized in that a vitamin E-containing product stream is fed to a first rectification column (105), low-boiling products and unspecified isomers of vitamin E being taken off at the top (105a) of this first rectification column virtually without loss of useful substance, and a purified, vitamin E-containing stream being taken off at the side (105b) and/or at the bottom (105c) of the rectification column (105), at least a part of the side take-off or of the bottom take-off or at least a part of the side and bottom take-off is passed, for acetylation of vitamin E, into an acetylation stage (111), at least a part of the product stream emerging from the acetylation stage is passed into a second rectification column (115) or is taken off as useful product having a purity of ≥ 92 % by weight, and in a second rectification column, the VEA useful product is obtained as a side take-off having a purity of ≥ 97 % by weight.
    • 本发明涉及一种用于处理含维生素E(VE)和/或维生素E乙酸酯(VEA)的产品流)的方法,其基本特征在于纯化含维生素E的产物流,乙酰化 纯化的维生素E的至少一部分和至少一部分乙酰化维生素E的纯化,维生素E和维生素E乙酸酯的纯化优选通过蒸馏进行,例如精馏。 根据本发明的优选方法的特征在于将含维生素E的产物流加入到第一精馏塔(105)中,低沸点产物和维生素E的未指定异构体在该顶部(105a)处脱除 第一精馏塔实际上不损失有用物质,并且在精馏塔(105)的一侧(105b)和/或底部(105c)处取出纯化的含维生素E的物流,至少一部分 侧面起飞或底部起飞或至少部分侧面和底部起飞通过维生素E的乙酰化进入乙酰化阶段(111),至少部分产物流 从乙酰化阶段出来的化合物进入第二精馏塔(115)或作为纯度为= 92重量%的有用产物脱去,在第二精馏塔中,获得VEA有用产物作为侧取 纯度为97重量%。
    • 10. 发明申请
    • NOVEL PROCESS FOR THE MANUFACTURE OF METHYL LIMONITRILE
    • 用于制造甲基硫酸钠的新工艺
    • WO2013120808A1
    • 2013-08-22
    • PCT/EP2013/052689
    • 2013-02-11
    • DSM IP ASSETS B.V.
    • WILDERMANN, AngelaBONRATH, WernerBEUMER, RaphaelDORN, Silke
    • C07C253/30C07C255/07
    • C07C253/10C07C253/30C07C253/34C07C255/07
    • The present invention is directed to a process for the manufacture of methyl limonitrile comprising a mixture of 3,7-dimethyl-2,6-nonadiene nitrile, 3,7-dimethyl-3,6-nonadiene nitrile and 7-methyl-3-methylene-6-nonene nitrile comprising the following steps: a) reacting 6-methyl-5-octen-2-one with cyano acetic acid and removing carbon dioxide and water, wherein the reaction and the removal of carbon dioxide and water are performed in the presence of a base and a co-base 1 in an organic solvent, and wherein the organic solvent is a solvent which forms a heteroazeotrop with water; b) removing the solvent and the base of the reaction mixture obtained after having performed step a) or step c) by distillation to obtain a reaction mixture, whereby this step may optionally be performed in the presence of a co-base 2; c) isomerizing the reaction mixture obtained after having performed step a) or step b) to obtain an isomerized reaction mixture in the presence of a co-base 2; whereby step b) can be performed before or after step c).
    • 本发明涉及一种制备甲基有限公司的方法,该方法包括3,7-二甲基-2,6-壬二烯腈,3,7-二甲基-3,6-壬二烯腈和7-甲基-3- 亚甲基-6-壬烯腈包括以下步骤:a)使6-甲基-5-辛烯-2-酮与氰基乙酸反应并除去二氧化碳和水,其中二氧化碳和水的反应和除去在 在有机溶剂中存在碱和共碱1,其中有机溶剂是与水形成杂合性的溶剂; b)通过蒸馏除去在进行步骤a)或步骤c)之后获得的反应混合物的溶剂和碱,得到反应混合物,由此该步骤可任选地在共碱2存在下进行; c)使在步骤a)或步骤b)中获得的反应混合物异构化,以在共碱2存在下得到异构化反应混合物; 由此步骤b)可以在步骤c)之前或之后进行。