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    Process for isolating acrylic acid from aqueous crude acrylic acid by extraction with a ketone and plural stage distillation
    1.
    发明授权
    Process for isolating acrylic acid from aqueous crude acrylic acid by extraction with a ketone and plural stage distillation 失效
    使用酮和提取液进行萃取，从水溶液中分离丙烯酸的方法

    公开(公告)号：US3692829A

    公开(公告)日：1972-09-19

    申请号：US3692829D

    申请日：1970-12-15

    Applicant: KNAPSACK AG

    Inventor： SENNEWALD KURT ,  ERPENBACH HEINZ ,  HANDTE HEINZ ,  LORK WINFRIED

    IPC: B01D3/40 ,  B01D11/04 ,  C07C51/00 ,  C07C51/48 ,  C07C53/08 ,  C07C57/07 ,  C07C67/00 ,  C07C57/04

    CPC classification number: C07C51/48 ,  C07C57/04

    Abstract: Pure acrylic acid is isolated from an aqueous crude acid containing acrylic acid together with minor proportions of acetic acid, formaldehyde and high boilers boiling at a temperature higher than 220* C by liquid-liquid extraction with the use of 3,3,5-trimethylcyclohexanone and/or isophorone as the extractant(s). To this end, the aqueous acrylic acid-containing crude acid is subjected in an extraction zone to counterflow extraction with the use of the extractant(s) and with the resultant formation of an organic extract containing acrylic acid, acetic acid, high boilers and minor proportions of water, which are dissolved in the extractant; the extract is introduced approximately into the midsection of a first distilling column; acetic acid and water are removed overhead under reduced pressure; the base product of the first distilling column, containing extractant(s), acrylic acid and high boilers, is delivered approximately to the midsection of a second distilling column; pure acrylic acid is distilled off overhead under reduced pressure; and the base product of the second distilling column, consisting of high boilers and extractant(s), is recycled to the extraction zone.

    Abstract translation: 将纯丙烯酸与含有丙烯酸的含水粗酸以及少量乙酸，甲醛和高沸点沸点的高沸点物质分离，通过液 - 液萃取，使用3,3,5-三甲基环己酮 和/或异佛尔酮作为萃取剂。 为此，将含水丙烯酸的粗酸在萃取区中进行，使用萃取剂进行逆流萃取，形成含有丙烯酸，乙酸，高沸点和次要的有机萃取物 溶解在萃取剂中的水的比例; 将提取物大致引入第一蒸馏塔的中部; 乙酸和水在减压下从顶部除去; 含有萃取剂，丙烯酸和高锅炉的第一蒸馏塔的基础产物大约送到第二蒸馏塔的中部; 在减压下将纯丙烯酸蒸馏出顶部; 并且由高锅炉和萃取剂组成的第二蒸馏塔的基础产物被再循环到萃取区。

    Preparation of a carrier-supported catalyst
    4.
    发明授权
    Preparation of a carrier-supported catalyst 失效
    载体负载催化剂的制备

    公开(公告)号：US3691096A

    公开(公告)日：1972-09-12

    申请号：US3691096D

    申请日：1970-08-21

    Applicant: KNAPSACK AG

    Inventor： SENNEWALD KURT ,  ERPENBACH HEINZ ,  VOGT WILHELM ,  LORK WINFRIED ,  PRINZ PETER

    IPC: B01J23/89 ,  B01J27/192 ,  C07C45/35 ,  C07C51/25 ,  D01D10/04 ,  B01J11/82

    CPC classification number: C07C45/35 ,  B01J23/8993 ,  B01J27/192 ,  C07C51/252 ,  D01D10/049 ,  C07C47/22 ,  C07C57/04

    Abstract: Preparation of a carrier-supported catalyst consisting of oxides of iron, bismuth, molybdenum and optionally silver and phosphorus in the atomic ratio of Ag0 1.5Fe0.1 12 Bi0.1 12P0 5Mo12O30 110, and of silicon carbide, aluminum oxide or silicon dioxide as the carrier. The catalyst is prepared in two steps. In the first step a porous carrier is impregnated at least once with an aqueous solution of a molybdenum compound and the water is evaporated; in the second step, the said carrier is impregnated at least once, at temperatures of between 20* and 100*C, with an aqueous nitric acid solution of iron, bismuth and optionally silver nitrates and optionally phosphoric acid; after the last impregnation, the carrier so treated is allowed to remain in contact with the said aqueous nitric acid solution for a period of between 5 and 24 hours, water and nitric acid are evaporated with continuous agitation of the carrier, and the carrier with the said salts adhered thereto is dried at temperatures of between 100* and 300*C, and annealed at temperatures of between 450* and 550*C.

    Abstract translation: 由AgO-1.5Fe0.1-12 Bi0.1-12P0-5Mo12O30-110的原子比由铁，铋，钼和任选的银和磷的氧化物组成的载体负载催化剂的制备和碳化硅，铝 氧化物或二氧化硅作为载体。 催化剂分两步制备。 在第一步中，多孔载体用钼化合物的水溶液浸渍至少一次，蒸发水; 在第二步中，所述载体在20-100℃的温度下，用铁，铋和任选的硝酸银和任选的磷酸的硝酸水溶液浸渍至少一次; 在最后浸渍之后，将如此处理的载体与硝酸水溶液保持接触5至24小时之间，继续搅拌载体，蒸发水和硝酸，并将载体与 所述盐附着在100℃至300℃的温度下干燥，并在450-550℃的温度下进行退火。

    Process for the manufacture of acrylic acid by the oxidation of propylene and/or acrolein
    5.
    发明授权
    Process for the manufacture of acrylic acid by the oxidation of propylene and/or acrolein 失效
    通过丙烯和/或丙烯酸氧化制备丙烯酸的方法

    公开(公告)号：US3647867A

    公开(公告)日：1972-03-07

    申请号：US3647867D

    申请日：1968-08-13

    Applicant: KNAPSACK AG

    Inventor： SENNEWALD KURT ,  HAUSER ALFRED ,  LORK WINFRIED

    IPC: C07C51/25 ,  C07C57/04

    CPC classification number: C07C51/252 ,  C07C57/04

    Abstract: PRODUCTION OF ACRYLIC ACID COMPRISING REACTING PROPYLENE AND/OR ACROLEIN AND/OR A SUBSTANCE YIELDING ACROLEIN UNDER THE REACTION CONDITIONS, SUCH AS ALLYL ALCOHOL, IN THE GAS PHASE WITH OXYGEN AT TEMPERATURES BETWEEN 280 AND 600*C., UNDER PRESSURE BETWEEN 0.1 AND 10 ATMOSPHERES ABSOLUTE, AND FOR A PERIOD OF TIME BETWEEN 0.1 AND 20 SECONDS, IN THE PRESENCE OF STEAM AND IN CONTACT WITH A CATALYST CONSISTING OF THE OXIDES OF SILVER, IRON BISMUTH, MOLYBDENUM AND, IF DESIRED, PHOSPHORUS, WHICH ARE PRESENT IN THE ATOMIC RATIO OF

    AG0.01-1.5FE0.1-12BI091-12P0-5MO12O20-110

    THE CATALYST BEING DEPOSITED ON A CARRIER, IF DESIRED.

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