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    • 1. 发明授权
    • Preparation of higher unsaturated ketones
    • 制备较高级的不饱和酮
    • US4310705A
    • 1982-01-12
    • US163401
    • 1980-06-26
    • Axel NissenGerd KaibelOtto WoerzLothar ArnoldManfred BraunWalter Rebafka
    • Axel NissenGerd KaibelOtto WoerzLothar ArnoldManfred BraunWalter Rebafka
    • C07C49/20B01J31/14C07C45/00C07C45/67C07C45/68C07C67/00C07C45/48
    • C07C45/676
    • An improved process for the preparation of higher unsaturated ketones, such as geranylacetone and farnesylacetone, by reacting a .beta.,.gamma.-unsaturated alcohol and an alkyl acetoacetate at an elevated temperature in the presence of an organic aluminum compound, with elimination, and removal, of the alcohol derived from the alkyl acetoacetate in a reactor system carrying a fractionating column. The improvement in the purity, yield, and especially space-time yield of the product is achieved by starting from an alcohol having a higher boiling point than that of the alkyl acetoacetate used, carrying out the reaction in the presence of a small amount of an inert liquid which has a boiling point between that of the alkyl acetoacetate and the alcohol to be eliminated therefrom, and ensuring that the temperature at the bottom of the fractionating column is only slightly higher than the boiling point of the added liquid, under the prevailing pressure.
    • 通过在有机铝化合物的存在下在升高的温度下使β,γ-不饱和醇和乙酰乙酸烷基酯反应来制备高级不饱和酮,如香叶基丙酮和法呢基丙酮的改进方法,消除和除去 在含有分馏塔的反应器系统中衍生自乙酰乙酸烷基酯的醇。 通过从具有比所用乙酰乙酸烷基酯的沸点高的醇开始的醇开始,在少量的存在下进行反应来实现产物的纯度,产率和特别的时空产率的改善 沸点在乙酰乙酸烷基酯和被除去的醇之间的沸点的惰性液体,并且确保分馏塔底部的温度仅略高于添加液体的沸点,在主要压力下 。
    • 5. 发明申请
    • PROCESS FOR OBTAINING MALEIC ANHYDRIDE BY DISTILLATION
    • 通过蒸馏获得马来酸酐的方法
    • US20100113805A1
    • 2010-05-06
    • US12532660
    • 2008-03-19
    • Gunther WindeckerGerd KaibelMichael SteinigerThilo BuntrockJens WeigunyDany Vanden HautteThierry Lurquin
    • Gunther WindeckerGerd KaibelMichael SteinigerThilo BuntrockJens WeigunyDany Vanden HautteThierry Lurquin
    • C07D307/60
    • B01D3/14B01D3/141C07C51/573C07C57/145
    • What is described is a process for obtaining maleic anhydride by distillation from a solution of maleic anhydride in a high-boiling absorbent which has been obtained by gas phase oxidation of a hydrocarbon and at least partial absorption of the oxidation products into the absorbent, by i) introducing the solution into the side of a feed column with a rectifying section disposed above the feed point and a stripping section disposed below the feed point, ii) providing an upper combining column which communicates with the upper end of the rectifying section and a lower combining column which communicates with the lower end of the stripping section, iii) providing a draw column which communicates with the upper combining column and the lower combining column, iv) drawing maleic anhydride off as a side draw from the draw column, and drawing off compounds having a lower boiling point than maleic anhydride at the top of the upper combining column and the high-boiling absorbent at the bottom of the lower combining column. The maleic anhydride obtained as a side draw has a low content of acrylic acid and acetic acid.
    • 所描述的是通过蒸馏从马来酸酐在高沸点吸收剂中的溶液获得马来酸酐的方法,其通过烃的气相氧化和至少部分吸收氧化产物进入吸收剂中获得, 将溶液引入进料塔的侧面,其中设置在进料点上方的精馏部分和设置在进料点下方的汽提部分,ii)提供与精馏部分的上端连通的上部混合塔和下部 组合柱与汽提部分的下端连通,iii)提供与上部混合塔和下部混合塔连通的牵引柱,iv)将拉伸马来酸酐作为拉伸塔的牵引拉出,拉出 在上部混合塔的顶部具有比马来酸酐低的沸点的化合物和在底部o的高沸点吸收剂 f下组合列。 作为侧馏分获得的马来酸酐具有低含量的丙烯酸和乙酸。