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    • 1. 发明授权
    • Continuous industrial production of unsaturated aliphatic aldehydes in a
tube bundle reactor
    • 在管束反应器中连续工业生产不饱和脂族醛
    • US6013843A
    • 2000-01-11
    • US85836
    • 1998-05-28
    • Werner AquilaHartwig FuchsOtto WorzWilhelm RuppelKlaus Halbritter
    • Werner AquilaHartwig FuchsOtto WorzWilhelm RuppelKlaus Halbritter
    • B01J23/52B01J8/02B01J8/08C07B61/00C07C45/38C07C45/67C07C47/21C07C47/22C07C45/00
    • C07C45/38B01J8/0242B01J8/087C07C45/67B01J2208/00212
    • A process for continuous industrial production of unsaturated aliphatic aldehydes having a boiling range from 95 to 136.degree. C. by oxidative dehydrogenation of the corresponding alcohols with an oxygen-comprising gas over a supported catalyst consisting of copper, silver and/or gold on an inert support in a tube bundle reactor, rapid cooling of the reaction gases and removal of the aldehydes from the resulting condensate with recycling of the unconverted alcohols comprisesa) vaporizing the alcohol,b) admixing the alcohol vapor with an oxygen-comprising gas,c) initially passing the resulting oxygen-comprising alcohol vapor at above the dew point of the alcohol but below the commencement temperature of the reaction through a layer of one of the abovementioned supported catalysts which is at least 0.5 cm in thickness and only thend) reacting the oxygen-comprising alcohol vapor at from 300 to 600.degree. C. in a sufficient number, for the desired capacity, of parallel reaction tubes surrounded by a fluidic heat transfer medium, packed with the supported catalyst and having an internal diameter D of from about 0.5 to 3 cm and a length of at least 5 cm, to form the corresponding aldehyde.
    • 通过相对应的醇与含氧气体在由铜,银和/或金组成的负载型催化剂上惰性惰性的连续工业生产不饱和脂族醛的方法,其沸程为95至136℃ 在管束反应器中的支撑,反应气体的快速冷却以及未转化的醇的再循环从所得冷凝物中除去醛包括a)蒸发醇,b)将醇蒸气与含氧气体混合,c) 首先将所得的含氧醇醇蒸气在醇的露点以上但低于反应开始温度的上述负载型催化剂层中的至少0.5cm厚度,然后d)使 含氧的醇蒸气在300-600℃下以足够的数量容纳所需的并联反应管 由流体传热介质引入,填充有负载的催化剂并且具有约0.5至3cm的内径D和至少5cm的长度以形成相应的醛。
    • 10. 发明授权
    • Preparation of citral
    • 柠檬醛的制备
    • US06175044B1
    • 2001-01-16
    • US09404548
    • 1999-09-24
    • Jörg TherreGerd KaibelWerner AquilaG{umlaut over (u)}nter WegnerHartwig Fuchs
    • Jörg TherreGerd KaibelWerner AquilaG{umlaut over (u)}nter WegnerHartwig Fuchs
    • C07C4551
    • C07C45/515C07C45/513C07C45/67C07C47/21
    • 3,7-Dimethyl-2,6-octadien-1-al of formula I is prepared continuously by: thermally cleaving, in the presence or absence of an acid catalyst, 3-methyl-2-buten-1-al diprenyl acetal of formula II: thereby eliminating 3-methyl-2-buten-1-ol of formula III and yielding cis/trans-prenyl 3-methylbutadienyl ether of formula IV: thermally rearranging the resultant butadienyl ether of formula IV thereby yielding 2,4,4-trimethyl-3-formyl-1,5-hexadiene of formula V: subsequently rearranging intermediate (V) thereby yielding citral product of formula I, which comprises: as the reaction proceeds, continuously distilling the reaction mixture thereby continuously removing prenol, which is formed by degradation of acetal II, and the intermediates of formula IV and V and any citral product which is formed during the reaction; and thermally rearranging said intermediates of formula IV and V at a temperature of 100-200° C. in the absence or presence of said prenol to form citral product.
    • 通过以下方式连续制备式I的3,7-二甲基-2,6-辛二烯-1-醇:在存在或不存在酸催化剂的情况下,热裂解3-甲基-2-丁烯-1-al阮内烯 式II:由此除去式III的3-甲基-2-丁烯-1-醇,得到式IV的顺/反 - 异戊烯基3-甲基丁二烯基醚:热重新排列所得的式IV的丁二烯基醚,由此得到2,4,4 式V的 - 三甲基-3-甲酰基-1,5-己二烯:随后重新排列中间体(V),从而产生式I的柠檬醛产物,其包括:随着反应的进行,连续蒸馏反应混合物,从而连续除去前醇, 由缩醛II的降解形成,以及式IV和V的中间体以及在反应期间形成的任何柠檬醛产物; 在不存在或存在所述prenol的情况下,在100-200℃的温度下热处理所述式IV和V的中间体,以形成柠檬醛产物。