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    Process for the preparation of adiponitrile from adipic acid and ammonia
    2.
    发明授权
    Process for the preparation of adiponitrile from adipic acid and ammonia 失效
    从ADIPIC酸和氨基酸制备ADIPONITRILE的方法

    公开(公告)号：US3661973A

    公开(公告)日：1972-05-09

    申请号：US3661973D

    申请日：1969-02-28

    Applicant: UBE INDUSTRIES

    Inventor： SUZUKAWA YUICHI ,  KONO HISASHI ,  TERAI KENJI ,  KURIBAYASHI ATUSHI ,  NIWA TAKAZUMI

    IPC: C07C121/10

    CPC classification number: C07C255/00

    Abstract: PROCESS FOR PREPARING ADIPONITRILE COMPRISING REACTING ADIPIC ACID AND AMMONIA AT 250 TO 550*C. IN A FLUIDIZED BED OF A SOLID DEHYDRATION CATALYST FLUIDIZED BY AMMONIA GAS, WHEREIN A PART OF AMMONIA GAS PREHEATED AT HIGH TEMPERATURES IS INTRODUCED INTO THE FLUIDIZED BED THROUGH A FUNNEL-SHAPED DISTRIBUTOR POSITIONED AT THE BOTTOM OF THE FLUDIZED BED; ADIPIC ACID IN FORM OF A HOT AQUEOUS SOLUTION IS SPRAYED INT THE FLUIDIZED BED THROUGH A NOZZLE FOR SPRAYING A HOT AQUEOUS SOLUTION OF ADIPIC ACID PROVIDED AT THE CENTRAL PORTION OF SAID DISTRIBUTOR; AND THE REST OF AMMONIA GAS PREHEATED AT HIGH TEMPERATURES IS INJECTED INTO THE FLUIDIZED BED AD GAS JET STREAM FROM AN INJECTION OPENING PROVIDED AT THE CENTRAL PORTION OF SAID DISTRIBUTOR AND AROUND SAID NOZZLE.

    Production of nitriles
    6.
    发明授权
    Production of nitriles 失效
    生产硝基

    公开(公告)号：US3850974A

    公开(公告)日：1974-11-26

    申请号：US36296773

    申请日：1973-05-23

    Applicant: AKZONA INC

    Inventor： LICHTENWALTER G ,  HAMMERBERG E

    IPC: C07C121/10

    CPC classification number: C07C253/22 ,  C07C255/03 ,  C07C255/07 ,  C07C255/33

    Abstract: 1. IN A METHOD FOR THE SINGLE STAGE CONVERSION OF A CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF A FATTY ACID CONTAINING FROM 8 TO 24 CARBON ATOMS, A TALL OIL ACID, AND PHENYLSTEARIC ACID, IN THE LIQUID STATE, TO THE CORRESPONDING NITRILE BY REACTION WITH GASEOUS AMMONIA IN THE PRESENCE OF A DEHYDRATION CATALYST, THE IMPROVEMENT COMPRISING THE STEPS OF: (A) REACTING A DOWNWARDLY MOVING STREAM OF AN ACID SELECTED FROM THE GROUP CONSISTING OF A FATTY ACID, A TALL OIL ACID, AND PHENYLSTEARIC ACID, IN THE LIQUID STATE, WITH AN UPWARDLY MOVING COUNTERCURRENT STREAM OF GASEOUS AMMONIA, IN A SINGLE STAGE REACTION ZONE, THE MOLAR RATIO OF AMMONIA TO ACID BEING BETWEEN 1:1 AND ABOUT 3:1, IN THE PRESENCE OF A DEHYDRATION CATALYST, THE RESIDENCE TIME OF SAID REACTANTS IN SAID ZONE BEING BETWEEN ABOUT 10 AND ABOUT 60 MINUTES; (B) MAINTAINING THE TEMPERATURE OF THE REACTANTS IN SAID ZONE BETWEEN ABOUT 300*C. AND ABOUT 380*C., THE NITRILE FORMED REMAINING IN THE LIQUID STATE, THE TEMPERATURE AND FLOW RATE OF THE GASEOUS AMMONIA BEING EFFECTIVE TO MAINTAIN THE WATER FORMED IN THE REACTION IN THE VAPOR STATE AND TO EFFECT REDUCED BACKMIXING OF THE WATER AND ITS REMOVAL FROM THE REACTION STAGE WITH SUBSTANTIALLY NO CONDENSATION THEREOF AND SUBSTANTIALLY TO RECIRCULATION OR BACK-FLOW OF LIQUID PHASES IN THE REACTION SYSTEM.

    Process for adiponitrile
    7.
    发明授权
    Process for adiponitrile 失效
    ADIPONITRILE的工艺

    公开(公告)号：US3839404A

    公开(公告)日：1974-10-01

    申请号：US33980073

    申请日：1973-03-09

    Applicant: SUN RESEARCH DEVELOPMENT

    Inventor： NORTON R

    IPC: C07C121/10

    CPC classification number: C07C255/00

    Abstract: 1. A PROCESS FOR THE PREPARATION OF ADIPONITRILE WHICH COMPRISES HEATING AN AQUEOUS SOLUTION OR DISPERSION OF DIAMMONIUM ADIPATE CONTAINING AT LEAST ABOUT 5 MOLES OF AMMONIA PER MOLE OF ADIPIC ACID AT A TEMPERATURE BETWEEN ABOUT 200*C. AND ABOUT 300*C. TO OBTAIN EQUILIBRIUM CONCENTRATIONS OF HYDROLYSIS INTERMEDIATES, FEEDING SAID AQUEOUS EQUILIBRIUM HYDROLYSIS PRODUCTS TO A DEHYDRATION CATALYST IN A FIXED OR FLUIDIZED BED AT A TEMPERATURE BETWEEN ABOUT 330*C. AND 380*C., AND SEPARATING ADIPONITRILE FROM THE CATALYST BED EFFLUENT.

    Manufacture of adiponitrile
    9.
    发明授权
    Manufacture of adiponitrile 失效
    ADIPONITRILE制造

    公开(公告)号：US3671566A

    公开(公告)日：1972-06-20

    申请号：US3671566D

    申请日：1970-03-30

    Applicant: BASF AG

    Inventor： DECKER MARTIN ,  SCHMIDT JOSEPH ,  HOFFMANN HERWIG ,  PISTOR HANS JOACHIM

    IPC: C07C20060101 ,  C07C121/10

    CPC classification number: C07C255/00

    Abstract: Production of adiponitrile by introducing adipic acid in solid powder form or in liquid form and simultaneously introducing ammonia into a fluidized bed of a usual catalyst at a temperature of from 250* to 420*C and recovering the adiponitrile from the reaction gases by fractional distillation wherein there is added to the reaction gas before entry into the distillation column sufficient water to make the molar ratio of water vapor to ammonia 0.8 to 1.5 in the mixture entering the column. Adiponitrile is an intermediate in the manufacture of synthetic fibers of, for example, nylon 6.6.

    Abstract translation: 通过以固体粉末形式或液体形式引入己二酸生产己二腈，同时在250-420℃的温度下将氨引入常规催化剂的流化床中，并通过分馏从反应气中回收己二腈，其中 在进入蒸馏塔之前，将反应气体加入到足够的水中以使进入塔的混合物中水蒸气与氨的摩尔比为0.8至1.5。 己二腈是制造例如尼龙6.6的合成纤维的中间体。

    Purification process
    10.
    发明授权
    Purification process 失效

    公开(公告)号：US3859329A

    公开(公告)日：1975-01-07

    申请号：US38896573

    申请日：1973-08-16

    Applicant: ICI LTD

    Inventor： LAMBERT JOHN ERIC ,  VASEY CHARLES HENRY

    IPC: C07C121/10 ,  C07C121/26

    CPC classification number: C07C255/00

    Abstract: Adiponitrile containing 2-cyanocyclopenten-(1)-ylamine as impurity is treated with aqueous formaldehyde and, without prior separation of formaldehyde or its reaction products, the total mixture is either distilled to recover purified adiponitrile or is hydrogenated to hexamethylene diamine and the latter recovered by distillation.

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