中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

65 records (took 0.023 seconds)

    52.
    发明专利
    未知

    公开(公告)号：AT242217T

    公开(公告)日：2003-06-15

    申请号：AT95942198

    申请日：1995-12-22

    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 of caprolactam and hexamethylene diamine from adipodinitrile, by the following steps: (a) the adipodinitrile is partially hydrogenated, producing a mixture substantially containing 6-aminocapronitrile, hexamethylene diamine, ammonia, adipodinitrile and hexamethylene imine (= "the mixture"); (b) the mixture obtained in step (a) is distilled, producing ammonia, as the forerunnings, and a residue I, in the presence of a compound A which is inert in the distillation conditions, the ammonia not being separated totally; (c) the residue I, substantially containing "the mixture", inert compound A and ammonia, the ammonia content being less than that of the mixture used in step (b), is subjected to a second distillation, producing a mixture of the inert compound A and ammonia, as the forerunnings, and a residue II; (d) the base II, substantially containing "the mixture" and inert compound A, is subjected to distillation in a third column, producing the inert compound A, as the forerunnings, and a residue III; (e) the base III, substantially containing "the mixture" and optionally an inert compound B, is subjected to distillation in a fourth column, producing forerunnings KP1, which substantially contain hexamethylene imine, optionally inert compound B and hexamethylene diamine, and a residue IV; (f) the forerunnings KP1 are subjected in a fifth column to distillation, producing forerunnings KP2, which substantially contain hexamethylene imine and optionally inert compound B, and a residue V, which substantially contains hexamethylene diamine with a degree of purity of at least 95 %, the forerunnings KP2 being fed to the third column or optionally only partially fed to the third column, and the rest being discarded; and (g) the residue IV, substantially containing 6-aminocapronitrile and adipodinitrile, is subjected in a sixth column to distillation, producing 6-aminocapronitrile with a degree of purity of at least 95 %, as forerunnings, and adiponitrile in the residue. The resultant 6-aminocapronitrile is cyclized to form caprolactam.

    54.
    发明专利
    未知

    公开(公告)号：DE59902062D1

    公开(公告)日：2002-08-22

    申请号：DE59902062

    申请日：1999-08-17

    Applicant: BASF AG

    Inventor： LUYKEN HERMANN ,  OHLBACH FRANK ,  ANSMANN ANDREAS ,  BASSLER PETER ,  FISCHER ROLF ,  MELDER JOHANN-PETER ,  MERGER MARTIN ,  REHFINGER ALWIN ,  VOIT GUIDO ,  ACHHAMMER GUENTHER

    IPC: C07B61/00 ,  C07C209/48 ,  C07C209/84 ,  C07C211/12 ,  C07C253/30 ,  C07C253/34 ,  C07C255/24

    Abstract: A process for the coproduction of 6-aminocapronitrile and hexamethylenediamine starting from adiponitrile bya) hydrogenating adiponitrile in the presence of a catalyst comprising an element of the eighth transition group as catalytically active component, to obtain a mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers,b) distillatively removing hexamethylenediamine from the mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers, and eithercl) distillatively removing 6-aminocapronitrile, and thend1) distillatively removing adiponitrile, orc2) simultaneously distillatively removing 6-aminocapronitrile and adiponitrile into separate fractionsis characterized by base of column temperatures below 185° C. in steps d1) or c2).

    55.
    发明专利
    未知

    公开(公告)号：AT220061T

    公开(公告)日：2002-07-15

    申请号：AT95937070

    申请日：1995-11-14

    Applicant: BASF AG

    Inventor： ACHHAMMER GUENTHER ,  FUCHS EBERHARD

    IPC: C07D201/08 ,  C07D223/10

    Abstract: Caprolactam is prepared by reacting a solution of 6-aminocapronitrile with water in the liquid phase at elevated temperatures by a process in which (a) an aqueous solution of 6-aminocapronitrile in the liquid phase is heated without the addition of a catalyst in a reactor A to give a mixture I consisting essentially of water, caprolactam and a high-boiling fraction (high boiler), then (b) the water is removed from the resulting mixture I to give a mixture II consisting essentially of caprolactam and the high boilers, then (c) the caprolactam and the high boilers from mixture II are separated from one another by distillation, and then either (d1) the high boilers from stage (c) are fed into the reactor A of stage (a) or (d2) the high boilers are heated similarly to stage (a) in a further reactor B and then worked up similarly to stages (b) and (c) to give further caprolactam, or (d3) the high boilers are heated under reduced pressure in the presence of a base in a reactor C and the reacted mixture is worked up by distillation to give caprolactam.

    METHOD FOR THE PREPARATION OF CAPROLACTAM
    56.
    发明专利
    METHOD FOR THE PREPARATION OF CAPROLACTAM 未知

    公开(公告)号：BG63302B1

    公开(公告)日：2001-09-28

    申请号：BG10159697

    申请日：1997-06-10

    Applicant: BASF AG

    Inventor： FUCHS EBERHARD ,  ACHHAMMER GUENTHER

    IPC: C07D201/08 ,  C07D223/10

    Abstract: The invention relates to a method for the preparation of caprolactam by heating of 6-aminocapronitrile in the presence of heterogenous catalyst and water under increased pressure where: (a) 6-aminocapronitrile or a mixture containing basically 6-aminocapronitrile and water and low-boiling or high-boiling alcohol are heated in the presence of heterogenous catalyst in reactor (A) for producing mixture (I). Then, (b) mixture (I) is distilled, divided in a fraction from the top of the column, caprolactam and bottom residue as any ammonia in mixture (I) is removed before the distillation, after which (c1) fraction from the top of the column is introduced in the reactor from stage (a). The fraction from the top of the column is usually mixed with alcohol and/or water, and/or 6-aminocapronitrile used in stage (a), before being introduced in reactor (A), or (c2) the fraction from the top of the column is optionally introduced in reactor (B) together with the bottom residue of stage (b). The fraction from the top of the column is optionally mixed with the alcohol and/or water, and/or 6-aminocapronitrile used in stage (a) before being introduced in reactor (B). Finally, analogically to stage (b) by distillation caprolactam is extracted and (d1) the bottom residue of stage (b) is introduced in reactor (A) of stage (a) or (d2) the bottom residue is mixed in a given case with water and optionally - with low-boiling or high-boiling alochol. After that, analogically to stage (a) it is heated in a subsequent reactor (C) to the preparation of a reaction product which is subjected to distillation for the production of caprolactam, or (d3) water is added to the bottom residue heated in reactor (D) without the addition of any catalyst for the production of a reaction product which is distilled for the production of the caprolactam, or (d4) water and base is added to the bottom residue. The residue is heated in reactor (E) until the production of a reaction product which is distilled for the preparation of caprolactam. 7 claims

    59.
    发明专利
    未知

    公开(公告)号：AT184595T

    公开(公告)日：1999-10-15

    申请号：AT95941035

    申请日：1995-11-29

    Applicant: BASF AG

    Inventor： FUCHS EBERHARD ,  ACHHAMMER GUENTHER

    IPC: C07D201/08 ,  C07D223/10

    Abstract: An improved process for the preparation of caprolactam by heating 6-aminocapronitrile in the presence of a heterogenous catalyst and water under superatmospheric pressure without rapid deactivation of the catalysts used. The process further includes the addition of a low or high boiling alcohol in the heating phase, after which the products are obtained by distillation. The process further includes a method of working up the top and bottom products of the reactors to achieve higher yields.

Patent Agency Ranking