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    METHOD OF SIMULTANEOUSLY PREPARING CAPROLACTAM AND HEXAMETHYLENE DIAMINE
    81.
    发明专利
    METHOD OF SIMULTANEOUSLY PREPARING CAPROLACTAM AND HEXAMETHYLENE DIAMINE 未知

    公开(公告)号：BG101661A

    公开(公告)日：1998-02-27

    申请号：BG10166197

    申请日：1997-06-24

    Applicant: BASF AG

    Inventor： ACHHAMMER GUENTHER ,  BASSLER PETER ,  FISCHER ROLF ,  FUCHS EBERHARD ,  LUYKEN HERMANN ,  SCHNURR WERNER ,  WITZEL TOM

    IPC: C07D201/02 ,  C07C209/48 ,  C07C211/12 ,  C07D201/08 ,  C07D223/10

    Abstract: The invention concerns the simultaneous preparation ofcaprolactam and hexamethylene diamine from adipodinitrile, by thefollowing steps: (a) the adipodinitrile is partially hydrogenated,producing a mixture substantially containing 6-aminocapronitrile,hexamethylene diamine, ammonia, adipodinitrile and hexamethyleneimine ( "the mixture"); (b) the mixture obtained in step (a) isdistilled, producing ammonia, as the forerunnings, and a residueI, in the presence of a compound A which is inert in thedistillation conditions, the ammonia not being separated totally;(c) the residue I, substantially containing 'the mixture", inertcompound A and ammonia, the ammonia content being less than thatof the mixture used in step (b), is subjected to a seconddistillation, producing a mixture of the inert compound A andammonia, as the forerunnings, and a residue II; (d) the base II,substantially containing "the mixture" and inert compound A, issubjected to distillation in a third column, producing the inertcompound A, as the forerunnings, and a residue III; (e) the baseIII, substantially containing "the mixture" and optionally aninert compound B, is subjected to distillation in a fourth column,producing forerunnings KP, which substantially containhexamethylene imine, optionally inert compound B and hexamethylenediamine, and a residue IV; (f) the forerunnings KP are subjectedin a fifth column to distillation, producing forerunnings KP2,which substantially contain hexamethylene imine and optionallyinert compound B, and a residue V, which substantially containshexamethylene diamine with a degree of purity of at least 95 %,the forerunnings KP2 being fed to the third column or optionallyonly partially fed to the third column, and the rest beingdiscarded; and (g) the residue IV, substantially containing6-aminocapronitrile and adipodinitrile, is subjected in a sixthcolumn to distillation, producing 6-aminocapronitrile with adegree of purity of at least 95 %, as forerunnings, andadiponitrile in the residue. The resultant 6-aminocapronitrile iscyclized to form caprolactam.

    PROCESS OF OBTAINING CAPROLACTAM BY DEPOLYMERIZATION OF MELTED POLYCAPROLACTAM
    82.
    发明专利
    PROCESS OF OBTAINING CAPROLACTAM BY DEPOLYMERIZATION OF MELTED POLYCAPROLACTAM 未知

    公开(公告)号：CZ176497A3

    公开(公告)日：1998-01-14

    申请号：CZ176497

    申请日：1995-12-01

    Applicant: BASF AG

    Inventor： KALCK ULRICH ,  JONES SIMON A ,  BASSLER PETER ,  PRIESTER CLAUS ULRICH ,  KOPIETZ MICHAEL

    IPC: C07D201/12

    Abstract: Caprolactam is obtained from mixtures which contain polymers or thermoplastic molding materials having the repeating unit -N(H)-(CH2)5-C(O)- (a) by cleavage at elevated temperatures in the presence of a base under reduced pressure or (b) in the presence of water, by using a mixture essentially comprising from 50 to 99.9% by weight of a polymer or of a thermoplastic molding material having the repeating unit -N(H)-(CH2)5-C(O)- from 0.1 to 50% by weight of additives selected from the group consisting of inorganic fillers, organic and inorganic pigments and dyes, from 0 to 10% by weight of organic and/or inorganic additives, from 0 to 40% by weight of non-polyamide-containing polymers and from 0 to 20% by weight of polyamides, with the exception of polycaprolactam and copolyamides prepared from caprolactam, and carrying out the cleavage in the presence of a base under reduced pressure, the water content of the mixture used being not more than 0.01% by weight, or carrying out the cleavage in the presence of water without the addition of acid or base at from 270 DEG to 350 DEG C. and a weight ratio of water to polymer or thermoplastic molding material of from 1:1 to 20:1 and in a reaction time of less than 3 hours.

    88.
    发明专利
    未知

    公开(公告)号：BRPI0507197B1

    公开(公告)日：2014-12-30

    申请号：BRPI0507197

    申请日：2005-01-27

    Applicant: BASF AG

    Inventor： JUNGKAMP TIM ,  SCHEIDEL JENS ,  SIEGEL WOLFGANG ,  BAUMANN ROBERT ,  BARTSCH MICHAEL ,  HADERLEIN GERD ,  LUYKEN HERMANN ,  AECHTNER TOBIAS ,  PFAB PETER ,  DECKERT PETRA ,  BASSLER PETER

    IPC: C07C253/10 ,  C07C255/07

    Abstract: A process is described for preparing 3-pentenenitrile, characterized by the following process steps: (a) isomerizing a reactant stream which comprises 2-methyl-3-butenenitrile over at least one dissolved or dispersed isomerization catalyst to give a stream 1 which comprises the at least one isomerization catalyst, 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile, (b) distilling stream 1 to obtain a stream 2 as the top product which comprises 2-methyl-3-butenenitrile, 3-pentenenitrile and (Z)-2-methyl-2-butenenitrile, and a stream 3 as the bottom product which comprises the at least one isomerization catalyst, (c) distilling stream 2 to obtain a stream 4 as the top product which, compared to stream 2, is enriched in (Z)-2-methyl-2-butenenitrile, based on the sum of all pentenenitriles in stream 2, and a stream 5 as the bottom product which, compared to stream 2, is enriched in 3-pentenenitrile and 2-methyl-3-butenenitrile, based on the sum of all pentenenitriles in stream 2, (d) distilling stream 5 to obtain a stream 6 as the bottom product which comprises 3-pentenenitrile and a stream 7 as the top product which comprises 2-methyl-3-butenenitrile.

    METHOD FOR PURIFYING CAPROLACTAM
    89.
    发明专利
    METHOD FOR PURIFYING CAPROLACTAM 未知

    公开(公告)号：CA2505359C

    公开(公告)日：2011-02-01

    申请号：CA2505359

    申请日：2003-11-11

    Applicant: BASF AG

    Inventor： LUYKEN HERMANN ,  ANSMANN ANDREAS ,  BENISCH CHRISTOPH ,  BASSLER PETER ,  FISCHER ROLF-HARTMUTH ,  MAIXNER STEFAN ,  MELDER JOHANN-PETER

    IPC: C07D201/16 ,  C07D201/08

    Abstract: The invention relates to a method for purifying crude caprolactam that has been obtained by: 1) reacting a mixture (I) containing 6-aminocapronitrile and water to form a mixture (II) containing caprolactam, ammonia, water, high boilers and low boilers in the presence of a catalyst followed by; 2) removing ammonia from mixture (II) while obtaining a mixture (III) that contains caprolactam, water, high boilers and low boilers, after which; 3) water is entirely or partially removed from mixture (III) while obtaining a crude caprolactam (IV) that contains caprolactam, high boilers and low boilers. The inventive method is characterized in that: a) the crude caprolactam and an inorganic acid, which has a boiling point higher that that of caprolactam under distillation conditions in accordance with subsequent steps b) to h), are fed to a first distillation device K1; b) the crude caprolactam and the inorganic acid are distilled in the first distillation device K1 during which a first partial flow in the bottom area and a second partial flow in the top area are withdrawn from the distillation device K1; c) the second partial flow from step b) is fed to a second distillation device K2; d) the second partial flow from step b) is distilled in the second distillation device K2 during which a first partial flow in the bottom area and a second partial flow in the top area are withdrawn from the distillation device K2; e) a first partial flow from step d) is fed to a third distillation device K3; f) the first partial flow from step d) is distilled in the third distillation device K3 during which a first partial flow in the bottom area and purified caprolactam in the top area are withdrawn from the distillation device K3, and; g) the first partial flow from step f) is fed to the first distillation device K1.

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