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    Process for the preparation of propylene oxide
    1.
    发明授权
    Process for the preparation of propylene oxide 失效
    环氧丙烷的制备方法

    公开(公告)号：US4137242A

    公开(公告)日：1979-01-30

    申请号：US678823

    申请日：1976-04-28

    申请人： Gunter Prescher ,  Gerd Schreyer ,  Otto Weiberg ,  Rolf Wirthwein ,  Helmut Waldmann ,  Hermann Seifert ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    发明人： Gunter Prescher ,  Gerd Schreyer ,  Otto Weiberg ,  Rolf Wirthwein ,  Helmut Waldmann ,  Hermann Seifert ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    IPC分类号： C07C409/24 ,  C07D301/14 ,  C07D301/32

    CPC分类号： C07D301/14 ,  C07C407/00 ,  C07C407/003

    摘要： Process for continuous production of propylene oxide (FIG. 1) from propylene and aqueous hydrogen peroxide. The aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid (1). The perpropionic acid is taken up by extraction in benzene (5, 18) and following drying of the benzene solution (21), the perpropionic acid in the solution is reacted with propylene (24) for oxidation of the propylene to propylene oxide and conversion of the perpropionic acid back to propionic acid. The reaction mixture is worked up to separate propylene oxide, propionic acid and benzene (30, 32, 37, 39), and the latter two are recycled. In the benzene extraction (5, 18), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst. The aqueous raffinate can be divided into a stream which is recycled to the propionic acid reactor (1), and a second stream which can be distilled to remove water with the concentrate being recycled to the propionic acid reactor. (1)

    摘要翻译： 从丙烯和过氧化氢水溶液连续生产环氧丙烷（图1）的方法。 过氧化氢水溶液首先在酸催化剂存在下与丙酸反应形成过丙酸（1）。 通过在苯（5,18）中萃取并过滤苯溶液（21），将过丙酸吸收，将溶液中的丙酸与丙烯（24）反应，将丙烯氧化成环氧丙烷，并将 过丙酸回到丙酸。 处理反应混合物以分离环氧丙烷，丙酸和苯（30,32,37,39），后两者被再循环。 在苯提取（5,18）中，形成含有过氧化氢和酸催化剂的残液水溶液（7）。 含水萃余液可以分为循环到丙酸反应器（1）的料流，以及可以将浓缩物再循环到丙酸反应器中的蒸馏水以除去水的第二料流。

    Process for the preparation of propylene oxide
    2.
    发明授权
    Process for the preparation of propylene oxide 失效
    环氧丙烷的制备方法

    公开(公告)号：US4113747A

    公开(公告)日：1978-09-12

    申请号：US678822

    申请日：1976-04-28

    申请人： Gunter Prescher ,  Gerd Schreyer ,  Otto Weiberg ,  Rolf Wirthwein ,  Helmut Waldmann ,  Hermann Seifert ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    发明人： Gunter Prescher ,  Gerd Schreyer ,  Otto Weiberg ,  Rolf Wirthwein ,  Helmut Waldmann ,  Hermann Seifert ,  Wulf Schwerdtel ,  Wolfgang Swodenk

    IPC分类号： C07C409/24 ,  C07D301/14

    CPC分类号： C07C409/24 ,  C07C407/00 ,  C07C407/003 ,  C07D301/14

    摘要： Process for continuous production of propylene oxide (FIG. 1) from propylene and aqueous hydrogen peroxide. The aqueous hydrogen peroxide is first reacted with propionic acid in the presence of acid catalyst to form perpropionic acid (1). The perpropionic acid is taken up by extraction in benzene (5 , 12), and following drying of the benzene solution (16), the perpropionic acid in the solution is reacted with propylene (18) for oxidation of the propylene to propylene oxide and conversion of the perpropionic acid back to propionic acid. The reaction mixture is worked up to separate propylene oxide, propionic acid and benzene (25, 27, 31, 33), and the latter two are recycled. In the benzene extraction (5, 12), an aqueous raffinate (7) is formed containing hydrogen peroxide and acid catalyst. Water is removed from the aqueous raffinate (8) and the concentrate is recycled to the propionic acid reactor. Make-up hydrogen peroxide can be added to the aqueous raffinate before the removal of water.

    摘要翻译： 从丙烯和过氧化氢水溶液连续生产环氧丙烷（图1）的方法。 过氧化氢水溶液首先在酸催化剂存在下与丙酸反应形成过丙酸（1）。 通过在苯（5,12）中萃取，过丙酸被吸收，然后在苯溶液（16）干燥后，将溶液中的过丙酸与丙烯（18）反应，将丙烯氧化成环氧丙烷并转化 的过丙酸回到丙酸。 处理反应混合物以分离环氧丙烷，丙酸和苯（25,27,31,33），后两者被再循环。 在苯提取（5,12）中，形成含有过氧化氢和酸催化剂的残液水溶液（7）。 水从残液（8）中除去，浓缩物再循环到丙酸反应器中。 在除去水之前，可以将补充过氧化氢加入含水残液中。

    Process for the continuous preparation of percarboxylic acids in organic solutions
    5.
    发明授权
    Process for the continuous preparation of percarboxylic acids in organic solutions 失效
    在有机溶液中连续制备过羧酸的方法

    公开(公告)号：US4087455A

    公开(公告)日：1978-05-02

    申请号：US678824

    申请日：1976-04-28

    申请人： Gunter Prescher ,  Gerd Schreyer ,  Helmut Waldmann ,  Wulf Schwerdtel

    发明人： Gunter Prescher ,  Gerd Schreyer ,  Helmut Waldmann ,  Wulf Schwerdtel

    IPC分类号： C07C67/00 ,  C07C407/00 ,  C07C409/24 ,  C07C409/26 ,  C07C179/10

    CPC分类号： C07C407/00 ,  C07C407/003 ,  Y10S203/06 ,  Y10S203/09

    摘要： Process for the continuous preparation of organic solutions of percarboxylic acids by reaction of aqueous hydrogen peroxide with the corresponding carboxylic acid in the presence of an acid, water-soluble catalyst, extraction of the resulting reaction mixture with an organic solvent and recycle of the raffinate, containing hydrogen peroxide, after reconcentration by the removal of water by distillation into the reaction. The raffinate is fed, together with the whole of that amount of hydrogen peroxide which essentially to the consumption of hydrogen peroxide in the reaction or with a part thereof, into the distillation for the removal of water. The amount of water which essentially corresponds to the sum of the water of reaction formed during the reaction and the water introduced into the process with the feed products is distilled off under reduced pressure. The sump product, thus obtainable, from the distillation is recycled into the reaction.

    摘要翻译： 通过在酸，水溶性催化剂存在下，过氧化氢水溶液与相应的羧酸反应连续制备过羧酸的有机溶液的方法，用有机溶剂萃取所得反应混合物并回收萃余液， 在通过蒸馏除去水进行再浓缩后，含有过氧化氢。 加入萃余液与全部量的过氧化氢一起加入蒸馏水中，该过氧化氢基本上与反应中的过氧化氢或其一部分一起消耗。 基本上对应于在反应期间形成的反应的水和与进料产物一起引入该过程的水的总量的水在减压下蒸馏掉。 从蒸馏得到的贮槽产物被再循环到反应中。

    Process for the preparation of perpropionic acid solutions
    7.
    发明授权
    Process for the preparation of perpropionic acid solutions 失效
    制备过丙酸溶液的方法

    公开(公告)号：US4087454A

    公开(公告)日：1978-05-02

    申请号：US678821

    申请日：1976-04-28

    申请人： Gunter Prescher ,  Otto Weiberg ,  Helmut Waldmann ,  Hermann Seifert

    发明人： Gunter Prescher ,  Otto Weiberg ,  Helmut Waldmann ,  Hermann Seifert

    IPC分类号： C07C67/00 ,  C07C407/00 ,  C07C409/24 ,  C07D301/14 ,  C07C179/10

    CPC分类号： C07C407/00

    摘要： In the production of perpropionic acid by reaction of hydrogen peroxide and propionic acid in an aqueous medium and in the presence of an acid catalyst, e.g. sulfuric acid, to produce the peracid and water, the danger of explosion is reduced by employing a molar ratio of hydrogen peroxide to propionic acid of less than 1.4:1, a temperature of up to 60.degree. C, and an initial hydrogen peroxide:water ratio of up to 1.2, and a catalyst concentration of 10-40% of weight.

    摘要翻译： 在通过过氧化氢和丙酸在水性介质中和在酸催化剂（例如）的存在下反应生产过丙酸。 硫酸，以产生过酸和水，通过使用过氧化氢与丙酸的摩尔比小于1.4:1，温度高达60℃，初始过氧化氢：水，可以降低爆炸危险 比例高达1.2，催化剂浓度为10-40％重量。

    Process for the production of pure racemic acid and mesotartaric acid
    8.
    发明授权
    Process for the production of pure racemic acid and mesotartaric acid 失效
    制备纯外消旋酸和甲磺酸的方法

    公开(公告)号：US4048225A

    公开(公告)日：1977-09-13

    申请号：US660789

    申请日：1976-02-24

    申请人： Gunter Prescher ,  Gerd Schreyer

    发明人： Gunter Prescher ,  Gerd Schreyer

    IPC分类号： C07C59/245 ,  B01J23/00 ,  B01J23/92 ,  B01J31/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/367 ,  C07C51/43 ,  C07C51/47 ,  C07C59/255 ,  C07C67/00 ,  C07D303/48 ,  C07C59/14

    CPC分类号： C07D303/48 ,  B01J23/92 ,  C07C51/367 ,  C07C51/43 ,  C07C51/47 ,  C07C59/255 ,  Y02P20/584

    摘要： Pure racemic acid (dl-tartaric acid) and meso tartaric acid are produced by reaction of an alkali maleate with aqueous hydrogen peroxide in the presence of a catalyst which is an alkali molybdate or a mixture of an alkali molybdate and alkali tungstate in a process wherein the molar ratio of hydrogen peroxide to maleic acid is greater than 1:1 and the alkali salt of cis-epoxysuccinic acid formed together with the catalyst in a given case after destroying the excess hydrogen peroxide and other peroxygen compounds, are converted to free cis-epoxysuccinic acid and free molybdic acid or mixture of free molybdic acid and free tungstic acid by leading them over a strongly acidic cation exchanger, whereupon the hydrolysis of the free cis-epoxysuccinic acid to racemic acid and meso-tartaric acid can take place either in the presence of or the absence of the free molybdic acid or mixture of free molybdic acid and free tungstic acid, whereby the catalyst in the case of catalyst free hydrolysis before, and in the case of catalyst containing hydrolysis after this hydrolysis is removed with an anion exchanger and the racemic acid is then in known manner crystallized out of the catalyst free hydrolysis mixture by lowering the temperature in a given case with evaporation of water, whereupon the meso-tartaric acid remains in the mother liquor, and there is recovered from the mother liquor either by crystallization or by evaporation to dryness, in a given case in admixture with racemic acid, unreacted cis-epoxysuccinic acid and maleic acid, while the anion exchanger laden with the molybdic acid or mixture of molybdic acid and tungstic acid is regenerated in known manner with dilute aqueous alkali and, in a given case, the resulting solution of alkali molybdate or mixture of alkali molybdate and alkali tungstate, eventually after treatment with activated carbon is returned directly into the epoxidation step.

    摘要翻译： 通过碱金属马来酸盐与过氧化氢水溶液在催化剂的存在下，在碱金属钼酸盐或碱金属钼酸盐和碱金属钨酸盐的混合物存在下，制备纯外消旋酸（dl-酒石酸）和内消旋酒石酸， 过氧化氢与马来酸的摩尔比大于1:1，而在过去的过氧化氢和其他过氧化合物破坏之后，在给定情况下与催化剂一起形成的顺式环氧琥珀酸的碱式盐转化为游离的顺式 - 环氧琥珀酸和游离钼酸或游离钼酸和游离钨酸的混合物通过引导它们在强酸性阳离子交换剂上，由此将游离顺式 - 环氧琥珀酸水解成外消旋酸和内消旋酸 - 酒石酸可以在 存在或不存在游离钼酸或游离钼酸和游离钨酸的混合物，从而在催化剂自由水解的情况下催化剂b 之前，并且在用水解阴离子交换剂除去水解后的催化剂的情况下，然后以已知的方式将外消旋酸从无催化剂的水解混合物中结晶出来，在给定的情况下通过降低水的温度在水中蒸发， 中间酒石酸保留在母液中，通过结晶或通过蒸发至干，从母液中回收，在给定情况下与外消旋酸，未反应的顺式 - 环氧琥珀酸和马来酸混合，而阴离子 以钼酸或钼酸和钨酸的混合物的交换剂以已知的方式用稀碱水再生，在给定情况下，所得到的钼酸碱盐或钼酸碱盐和碱金属钨酸盐的混合物最终经活化后处理 碳直接返回到环氧化步骤中。

    Process for the production of pure racemic acid and mesotartaric acid and separation of maleic acid from synthetic tartaric acid
    9.
    发明授权
    Process for the production of pure racemic acid and mesotartaric acid and separation of maleic acid from synthetic tartaric acid 失效
    用于生产纯外消旋酸和间苯二甲酸并从合成酒石酸中分离马来酸的方法

    公开(公告)号：US4150241A

    公开(公告)日：1979-04-17

    申请号：US656591

    申请日：1976-02-09

    申请人： Gunter Prescher ,  Gerd Schreyer

    发明人： Gunter Prescher ,  Gerd Schreyer

    IPC分类号： B01D15/04 ,  B01J23/30 ,  B01J23/92 ,  C07C51/00 ,  C07C51/367 ,  C07C51/42 ,  C07C51/47 ,  C07C59/255 ,  C07C67/00 ,  C07D301/12 ,  C07D303/48 ,  C07C59/14

    CPC分类号： C07D303/48 ,  B01J23/92 ,  C07C51/367 ,  C07C51/42 ,  C07C51/47 ,  C07C59/255 ,  C07D301/12 ,  Y02P20/584

    摘要： Pure racemic acid (dl-tartaric acid) and meso tartaric acid are produced by reaction of an alkali maleate with aqueous hydrogen peroxide in the presence of an alkali tungstate in a process wherein the molar ratio of hydrogen peroxide to maleic acid is greater than 1:1 and the alkali salt of cis-epoxysuccinic acid formed together with the alkali tungstate, in a given case after destroying the excess hydrogen peroxide, are converted to free cis-epoxysuccinic acid and free tungstic acid by leading them over a strongly acidic cation exchanger, whereupon the hydrolysis of the free cis-epoxysuccinic acid to racemic acid and meso-tartaric acid can take place either in the presence of or the absence of the free tungstic acid, whereby the tungstic acid in the case of catalyst free hydrolysis before, and in the case of catalyst containing hydrolysis after this hydrolysis is removed with an anion exchanger and the racemic acid is then in known manner crystallized out of the tungstic acid free hydrolysis mixture by lowering the temperature in a given case with evaporation of water, whereupon the meso-tartaric acid remains in the mother liquor, and there is recovered from the mother liquor either by crystallization or by evaporation to dryness, in a given case in admixture with racemic acid, unreacted cis-epoxysuccinic acid and maleic acid, while the anion exchanger laden with the tungstic acid is regenerated in known manner with dilute aqueous alkali and, in a given case, the resulting solution of alkali tungstate, eventually after treatment with activated carbon is returned directly into the epoxidation step.There is also disclosed a process for the separation of maleic acid from synthetic tartaric acid containing maleic acid in which an aqueous solution of the crude tartaric acid which can also still contain the catalyst used, is led over a basic anion exchanger which is present in the hydroxyl or tartrate form.

    摘要翻译： 在碱性钨酸盐的存在下，通过碱金属马来酸盐与过氧化氢水溶液的反应，其中过氧化氢与马来酸的摩尔比大于1：1的方法制备纯外消旋酸（dl-酒石酸）和内消旋酒石酸。 1和与碱式钨酸盐形成的顺式 - 环氧琥珀酸的碱金属盐，在破坏过量的过氧化氢之后的给定情况下，通过使它们通过强酸性阳离子交换剂转化成游离的顺式 - 环氧琥珀酸和游离的钨酸， 因此，游离顺式 - 环氧琥珀酸向外消旋酸和内消旋酒石酸的水解可以在存在或不存在游离钨酸的情况下进行，由此在无催化剂的情况下，钨酸和 在这种水解后含有水解的催化剂的情况用阴离子交换剂除去，然后外消旋酸以已知的方式结晶出不含钨酸的水 通过在给定情况下通过降低水的温度来蒸发混合物，随后蒸发水，此时内消旋酒石酸保留在母液中，并且通过结晶或通过蒸发至干，从母液中回收，在给定情况下为混合物 外消旋酸，未反应的顺式 - 环氧琥珀酸和马来酸，而负载有钨酸的阴离子交换剂以已知的方式用稀碱水溶液再生，在给定的情况下，所得到的碱式钨酸钠溶液最终经过活化处理 碳直接返回到环氧化步骤中。