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31 条记录 (耗时 0.021 秒)

    Process for preparation of isoprene
    2.
    发明授权
    Process for preparation of isoprene 失效
    异戊二烯的制备方法

    公开(公告)号：US3972955A

    公开(公告)日：1976-08-03

    申请号：US505894

    申请日：1974-09-13

    申请人： Kurt Halcour ,  Paul Losacker ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    发明人： Kurt Halcour ,  Paul Losacker ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    IPC分类号： C07C1/247 ,  C07C1/00 ,  C07C11/18 ,  C07C67/00 ,  C07D319/06 ,  C07C1/20

    CPC分类号： C07C11/18 ,  C07D319/06

    摘要： In the preparation of isoprene by reacting isobutene with formaldehyde to produce 4,4-dimethyl-m-dioxane in a first stage, and decomposing the dioxane to isoprene and formaldehyde in a second stage, formaldehyde in the effluent streams of either or both of said stages is recovered. The formaldehyde-containing liquids are distilled to separate high boilers; the overhead, which is formaldehyde-rich, is extracted with isobutene feed to the process, whereby the isobutene extracts low boilers from the formaldehyde-containing liquid; and the formaldehyde-containing liquid, having at some point after said distillation been treated with an alkaline material, is subjected to rectification to produce as head product, the recovered formaldehyde.

    摘要翻译： 在通过使异丁烯与甲醛反应以在第一阶段中制备4,4-二甲基 - 间二恶烷制备异戊二烯并在第二阶段中将二恶烷分解成异戊二烯和甲醛的过程中，所述 阶段恢复。 将含甲醛的液体蒸馏以分离高锅炉; 富含甲醛的塔顶馏出物用异丁烯进料提取到该方法中，由此异丁烯从含甲醛的液体中提取低沸点物; 并且在所述蒸馏之后的某一点处，用碱性物质处理的含甲醛的液体经过精馏，作为回收的甲醛的头部产物。

    Process for the preparation of hexahydrophthalic acid anhydride
    5.
    发明授权
    Process for the preparation of hexahydrophthalic acid anhydride 失效
    六氢邻苯二甲酸酐的制备方法

    公开(公告)号：US4244877A

    公开(公告)日：1981-01-13

    申请号：US41547

    申请日：1979-05-23

    申请人： Kurt Halcour ,  Helmut Waldmann ,  Wulf Schwerdtel

    发明人： Kurt Halcour ,  Helmut Waldmann ,  Wulf Schwerdtel

    IPC分类号： C07C51/377 ,  C07D307/89

    CPC分类号： C07C51/377

    摘要： A process for the preparation of hexahydrophthalic acid anhydride which comprises hydrogenation .DELTA..sup.4 -tetrahydrophthalic acid anhydride in the liquid phase at a temperature of from 70.degree. to 150.degree. C. and at a pressure of from 30 to 200 bar in the presence of a catalyst selected from palladium, ruthenium, nickel or mixtures thereof arranged in a fixed bed, wherein the catalyst is applied to a carrier of alumina of which at least 20% by weight has been converted into lithium aluminium spinel and the liquid phase is a mixture of .DELTA..sup.4 -tetrahydrophthalic acid anhydride and hexahydrophthalic anhydride in a proportion by weight of from 1:1 to 1:100.

    摘要翻译： 一种制备六氢邻苯二甲酸酐的方法，其包括在液相中在催化剂存在下，在70〜150℃，压力为30〜200巴的条件下氢化DELTA4-四氢邻苯二甲酸酐 选自钯，钌，镍或其混合物，其中催化剂被施加到其中至少20重量％已经转化为锂铝尖晶石的氧化铝载体，液相是DELTA的混合物 4-四氢邻苯二甲酸酐和六氢邻苯二甲酸酐，其重量比为1:1至1:100。

    Process for the production of cyclopentene from dicyclopentadiene
    6.
    发明授权
    Process for the production of cyclopentene from dicyclopentadiene 失效
    从二环戊二烯生产环戊烯的方法

    公开(公告)号：US4048242A

    公开(公告)日：1977-09-13

    申请号：US575661

    申请日：1975-05-08

    申请人： Hubert Lauer ,  Norbert Schenk ,  Wulf Schwerdtel

    发明人： Hubert Lauer ,  Norbert Schenk ,  Wulf Schwerdtel

    IPC分类号： C07C1/00 ,  C07C4/22 ,  C07C5/05 ,  C07C13/12 ,  C07C13/15 ,  C07C67/00 ,  C07C5/06 ,  C07C5/16

    CPC分类号： C07C13/12 ,  C07C4/22 ,  C07C2101/10 ,  Y10S585/901

    摘要： Producton of cyclopentene by splitting of dicyclopentadiene to produce cyclopentadiene and hydrogenating the cyclopentadiene to produce the cyclopentene in crude form, and distilling the crude cyclopentene to separate low boilers and high boilers therefrom and provide the cyclopentene product. The high boilers are recycled to the dicyclopentadiene splitting stage and serve to reduce resin formation in that stage. The process is particularly effective where the dicyclopentadiene has a low content of the so-called "codimers" which, if present in sufficient amount, would reduce resin formation.

    摘要翻译： 通过分解二环戊二烯制备环戊二烯并氢化环戊二烯以粗制形成环戊烯，并将粗环戊烯蒸馏以分离出低沸点和高沸点的环戊烯的产物，并提供环戊烯产物。 高锅炉回收到二环戊二烯裂解阶段，用于减少该阶段的树脂形成。 当二环戊二烯具有低含量的所谓“配合物”时，该方法是特别有效的，如果存在足够的量，则可以减少树脂的形成。

    Process for the preparation of anthraquinone
    7.
    发明授权
    Process for the preparation of anthraquinone 失效
    制备蒽醌的方法

    公开(公告)号：US4220597A

    公开(公告)日：1980-09-02

    申请号：US6402

    申请日：1979-01-25

    申请人： Kurt Halcourt ,  Paul Losacker ,  Manfred Martin ,  Norbert Schenk ,  Wulf Schwerdtel

    发明人： Kurt Halcourt ,  Paul Losacker ,  Manfred Martin ,  Norbert Schenk ,  Wulf Schwerdtel

    IPC分类号： C07C50/18 ,  C07C45/00 ,  C07C46/02 ,  C07C46/04 ,  C07C51/31 ,  C07C67/00 ,  C07C49/68

    CPC分类号： C07C46/04 ,  C07C46/02 ,  C07C51/313

    摘要： A process has been found for the preparation of anthraquinone by catalytic oxidation of naphthalene in the gas phase to provide a reaction product, obtained by quenching, cooling or quenching and cooling, containing naphthaquinone and phthalic anhydride, treating said reaction product directly with butadiene to provide tetrahydroanthraquinone, oxidation by means of molecular oxygen to the tetrahydroanthraquinone contained in this reaction product, to give anthraquinone, and separation of naphthalene, phthalic anhydride, anthraquinone and by-products by distillation, the gases produced in the quenching and/or cooling of the gases from the naphthalene oxidation and the gases from the oxidation of the tetrahydroanthraquinone to give anthraquinone being completely or partially recycled to the oxidation of naphthalene, in which a compound with an alkaline reaction is introduced between the reactor in which naphthalene is oxidized and the reactor in which the reaction with butadiene takes place, and/or into the gas streams which are recycled to the oxidation of naphthalene.The process of the invention reduces considerably the formation of higher-boiling products formed in the continuous preparation of anthraquinone from naphthalene and increases the selectivity of the conversion of naphthalene to anthraquinone. In addition, the process of the invention provides greater freedom in separation of the reaction products since the production of troublesome high-boilers is minimized; and the process results in a reduced formation of carbon dioxide in the oxidation of naphthalene.

    摘要翻译： 已经发现通过在气相中催化氧化萘来制备蒽醌的方法，以提供含有萘醌和邻苯二甲酸酐的淬火，冷却或冷却或冷却获得的反应产物，直接用丁二烯处理所述反应产物以提供 四氢蒽醌，通过分子氧氧化成该反应产物中所含的四氢蒽醌，得到蒽醌，并通过蒸馏分离萘，邻苯二甲酸酐，蒽醌和副产物，在气体的淬火和/或冷却中产生的气体 从萘氧化和四氢蒽醌氧化的气体中得到蒽醌被完全或部分地再循环到萘的氧化中，其中将具有碱性反应的化合物引入萘被氧化的反应器中，其中反应器 与丁二烯的反应需要 ace和/或进入再循环到萘的氧化的气流中。 本发明的方法显着降低了从萘中连续制备蒽醌形成的较高沸点产物，并提高了萘转化为蒽醌的选择性。 此外，本发明的方法提供了更大的反应产物分离自由度，因为生产麻烦的高锅炉最小化; 并且该过程导致萘氧化中二氧化碳的形成减少。

    Isolating naphthoquinone and phthalic anhydride from naphthalene oxidation product
    8.
    发明授权
    Isolating naphthoquinone and phthalic anhydride from naphthalene oxidation product 失效
    从萘氧化产物中分离萘醌和邻苯二甲酸酐

    公开(公告)号：US4033987A

    公开(公告)日：1977-07-05

    申请号：US706093

    申请日：1976-07-16

    申请人： Joachim Priemer ,  Norbert Schenk ,  Jorg Krekel ,  Wulf Schwerdtel

    发明人： Joachim Priemer ,  Norbert Schenk ,  Jorg Krekel ,  Wulf Schwerdtel

    IPC分类号： C07D307/89 ,  C07C45/00 ,  C07C46/10 ,  C07C50/12 ,  C07C50/18 ,  C07C51/573 ,  C07C67/00 ,  C07C49/66

    CPC分类号： C07C46/10 ,  C07C51/573

    摘要： To isolate naphthoquinone and phthalic anhydride from the gas obtained in the gas phase oxidation of naphthalene, the gas product at 250.degree. to 500.degree. C is first quenched with a counter-current liquid stream of naphthalene, naphthoquinone and phthalic anhydride. The liquid is raised to at most 200.degree. C, cooled and partly recycled, the coolant temperature being within 70.degree. C of the temperature of the liquid being cooled. The portion of the quench liquid which is not recycled is the product, viz. a solution of naphthoquinone and phthalic anhydride in naphthalene. The quenched gas is scrubbed with liquid naphthalene and most of the liquid product is cooled and re-cycled, the balance of the liquid product being passed to the quencher. The gas which leaves the scrubber is substantially free from naphthoquinone and phthalic anhydride. The initial gas may have been pre-cooled by evaporative cooling. The surfaces of the quencher, cooler and pipes of the quenching system are preferably of stainless steel or are smoothed either mechanically or by coating with plastic, enamel, ceramic or metal.

    摘要翻译： 为了从萘气相氧化中得到的气体中分离出萘醌和邻苯二甲酸酐，首先用对流的萘，萘醌和邻苯二甲酸酐液体流将250℃至500℃的气体产物骤冷。 将液体升至至多200℃，冷却并部分回收，冷却液温度在待冷却液体温度的70℃以内。 不再循环的淬火液的部分是产品，即 萘醌和邻苯二甲酸酐在萘中的溶液。 淬灭的气体用液体萘洗涤，大部分液体产物被冷却并重新循环，液体产物的余量通过猝灭剂。 离开洗涤器的气体基本上不含萘醌和邻苯二甲酸酐。 初始气体可能已经通过蒸发冷却预冷却。 淬火系统的淬火器，冷却器和管道的表面优选为不锈钢或机械地或通过用塑料，搪瓷，陶瓷或金属涂覆而平滑化。

    Production of .omega.-formyl carboxylic acid esters
    10.
    发明授权
    Production of .omega.-formyl carboxylic acid esters 失效
    生产“7-甲酰基羧酸酯”

    公开(公告)号：US4013709A

    公开(公告)日：1977-03-22

    申请号：US651989

    申请日：1976-01-23

    申请人： Helmut Waldmann ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    发明人： Helmut Waldmann ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    IPC分类号： C07C69/67 ,  C07C67/00

    CPC分类号： C07C69/67

    摘要： A process for the production of an .omega.-formyl carboxylic acid ester, comprising reacting an enol ether of a cyclic ketone with hydrogen peroxide in the presence of at least one catalyst selected from the group consisting of a compound of boron or of a metal of the Fifth or Sixth Secondary Group of the Periodic Table. Advantageously the enol ether has the formula ##STR1## wherein R.sub.1 is alkyl of 1 to about 3 carbon atoms, cycloalkyl of 5 or 6 carbon atoms or phenyl optionally substituted by fluorine, chlorine, alkoxy of 1 to about 3 carbon atoms, cyano or phenyl,n is an integer of about 3 to 10, andR.sub.2 each independently is hydrogen, fluorine, chlorine, cyano, alkoxy of 1 to about 4 carbon atoms, alkyl of 1 to about 6 carbon atoms, cycloalkyl of 5 to 7 carbon atoms or phenyl optionally substituted by fluorine, chlorine, cyano, alkoxy of 1 to about 4 carbon atoms or alkyl of 1 to about 6 carbon atoms,And the catalyst comprises about 15 to 25 mole % based on the hydrogen peroxide of a boron oxide, a boric acid, a salt of a boric acid, a boron halogen compound, a complex boron compound or a boric acid ester of the formula ##STR2## wherein R.sub.4, R.sub.5 and R.sub.6 each independently is alkyl of 1 to about 6 carbon atoms optionally substituted by hydroxyl, fluorine, chlorine, alkoxy of 1 to about 3 carbon atoms or phenyl, cycloalkyl of 5 to 7 carbon atoms or phenyl optionally substituted by fluorine, chlorine or alkyl of 1 to about 3 carbon atoms,Or about 0.01 to 1 mole % of at least one acetate, benzoate, acetylacetonate or naphthenate of a metal of the Fifth or Sixth Group of the Periodic table.