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    Process for reducing the concentration of 2 - dichlorobutadiene-(1,3) in 1,2-dichloroethane recovered in the incomplete thermal cracking into vinyl chloride
    3.
    发明授权
    Process for reducing the concentration of 2 - dichlorobutadiene-(1,3) in 1,2-dichloroethane recovered in the incomplete thermal cracking into vinyl chloride 失效
    减少二氯二苯并（1,2）在不完全热裂解中转化为氯乙烯的1,2-二氯乙烯浓度的方法

    公开(公告)号：US3696015A

    公开(公告)日：1972-10-03

    申请号：US3696015D

    申请日：1970-11-18

    Applicant: KNAPSACK AG

    Inventor： WIRTZ PETER ,  JACOBOWSKY ARMIN ,  MITTLER WERNER ,  GERHARDT WILFRIED

    IPC: C07C17/383 ,  C07C17/00 ,  C07C17/38 ,  C07C17/395 ,  C07C19/045 ,  C07C67/00 ,  B01J1/10

    CPC classification number: C07C17/38 ,  C07C17/395 ,  C07C19/045

    Abstract: THE CONCENTRATION OF 2-CHLOROBUTADIENE-(1,3) IN 1,2DICHLOROETHANE RECOVERED IN THE INCOMPLETE THERMAL CRACKING OF 1,2-DICHLOROETHANE INTO VINYL CHLORIDE AND BEING CONTAIMINATED WITH LOW BOILERS BOILING AT A TEMPERATURE LOWER THAN 83.7*C. (760 MM. HG) AND HIGH BOILERS BOILING AT A TEMPERATURE HIGHER THAN 83.7*C. (760 MM. HG), IS REDUCED BY TRANSFORMING THE 2-CHLOROBUTADIENE-(1,3) LOW BOILER INTO A HIGH BOILER CONTAMINANT. TO THIS END, THE 1,2-DICHLOROETHANE IS DISTILLATIVELY FREED FROM ITS LOW BOILER CONTAMINANTS IN A LOW BOILER COLUMN; ALL OR A PORTION OF THE LOW BOILER CONTAMINANTS CONCENTRATING NEAR THE HEAD OF THE LOW BOILER COLUMN IS CONTINUOUSLY WITHDRAWN THEREFROM: THE LOW BOILER CONCENTRATE WITHDRAWN FROM THE LOW BOILER COLUMN IS TREATED WITH GASEOUS CHLORINE AT TEMPERATURES OF BETWEEN 10 AND 120*C., UNDER PRESSURES OF BETWEEN 1 AND 3 ATMOSPHERES ABSOLUTE, WITH IRRADIATION FO UTLRAVIOLET AND/OR VISIBLE LIGHT IN THE ABSENCE OF CATALYSTS, AND THE CHLORINE-TREATED LOW BOILER CONCENTRATE RECYCLED TO THE SAID LOW BOILER COLUMN; MATERIAL ACCUMULATING IN THE BASE OF THE SAID LOW BOILER COLUMN IS CONTINUOUSLY DELIVERED FROM THE LOW BOILER COLUMN TO A HIGH BOILER COLUMN; AND PURE DICHLOROETHANE IS DISTILLED OFF FROM THE HIGH BOILER CONTAMINANTS IN THE HIGH BOILER COLUMN.

    Process for regenerating a hydration catalyst
    4.
    发明授权
    Process for regenerating a hydration catalyst 失效
    再生水解催化剂的方法

    公开(公告)号：US3652455A

    公开(公告)日：1972-03-28

    申请号：US3652455D

    申请日：1970-04-17

    Applicant: KNAPSACK AG

    Inventor： BAADER HERBERT ,  OPITZ WOLFGANG ,  JACOBOWSKY ARMIN

    IPC: B01J23/96 ,  G21C1/12 ,  B01J11/18

    CPC classification number: B01J23/96 ,  G21C1/12 ,  G21Y2002/201 ,  G21Y2004/302

    Abstract: A CATALYST COMPRISING METALLIC PALLADIUM DEPOSITED ON A SILICA GEL OR ACTIVE CARBON CARRIER FOR USE IN THE HYDRATION AND DECHLORINATION OF DICHLOROACETIC ACID AND/OR TRICHLOROACETIC ACID TO PRODUCE MONOCHLOROACETIC ACID AND/OR ACETIC ACID IS REGENERATED. TO THIS EFFECT, THE POISONED CATALYST IS SUBJECTED IN THE HYDRATION ZONE ITSELF AT TEMPERATURES OF BETWEEN 50 AND 200*C. TO TREATMENT WITH DRY CHLORINE GAS UNTIL IT IS SATURATED, AND THE HYDRATION ZONE IS EXHAUSTED UNDER A PRESSURE OF BETWEEN ABOUT 500 AND 750 MM. MERCURY.

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