公开(公告)号：JP2002105039A

公开(公告)日：2002-04-10

申请号：JP2000300264

申请日：2000-09-29

Applicant: SUMITOMO CHEMICAL CO

Inventor： WOLFGANG HOELDERICH ,  GERD DAHLHOFF ,  SBRESNY ANDRE ,  ICHIHASHI HIROSHI

IPC: C07D223/10 ,  B01D1/00 ,  B01D1/16 ,  C07B61/00 ,  C07C249/14 ,  C07C251/44 ,  C07D201/04 ,  C07D201/06

Abstract: PROBLEM TO BE SOLVED: To provide a method for evaporating cyclohexanone oxime so as to diminish byproduct formation, and to provide an evaporator to be used for the method. SOLUTION: This method for evaporating cyclohexanone oxime comprises the following practice: a mixture of the cyclohexanone oxime and a diluent therefor is issued via an inlet tube 6 into a fluidized bed 11 where a granular inert matter having a heat capacity enough to feed a heat necessary for evaporating the mixture is fluidized by an inert gas.

公开(公告)号：JP2000256308A

公开(公告)日：2000-09-19

申请号：JP5556399

申请日：1999-03-03

Applicant: SUMITOMO CHEMICAL CO

Inventor： WOLFGANG HOELDERICH ,  GEORG PHILIPP HEITMANN ,  GERD DAHLHOFF

IPC: C07D201/04 ,  B01J21/08 ,  C07B61/00

Abstract: PROBLEM TO BE SOLVED: To produce the subject inexpensive lactam excellent in activity and useful for nylon, or the like, according to a vapor-phase Beckmann rearrangement reaction by using a silicon oxide treated with a specific acidic aqueous solution. SOLUTION: A silicon oxide treated with (C) an acidic aqueous solution at pH 1-6, preferably pH 1.5-3 is used as (A) a solid catalyst when producing ε-caprolactam from (B) cyclohexanone oxime using the component A under vapor-phase reactional conditions. The above silicon oxide is preferably amorphous silica and the above acidic aqueous solution is preferably an inorganic acid, especially one kind selected from the group consisting of hydrochloric acid, hydrofluoric acid, sulfuric acid and nitric acid, especially the hydrochloric acid. The silicon oxide preferably has a vicinal silanol. The catalyst is preferably obtained by mixing, e.g. the component A with the component C, carrying out the refluxing at about 20-100 deg.C temperature for about 1-50 h, then filtering the component A, washing the resultant component A with deionized water, or the like, and drying the washed solid catalyst at about 100 deg.C for about 1-10 h.

公开(公告)号：JP2002173479A

公开(公告)日：2002-06-21

申请号：JP2001278769

申请日：2001-09-13

Applicant: SUMITOMO CHEMICAL CO

Inventor： WOLFGANG HOELDERICH ,  GERD DAHLHOFF ,  ICHIHASHI HIROSHI ,  SUGITA KEISUKE

IPC: C07D223/10 ,  B01J29/86 ,  B01J29/90 ,  C07B61/00 ,  C07D201/04

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing ε-caprolactam including a method for regenerating a catalyst capable of suppressing the deterioration of the catalyst and a reactor used for the method. SOLUTION: This method for producing ε-caprolactam from cyclohexanone oxime under a gas phase reaction condition by using a zeolite or non-zeolite substance as a catalyst comprises a process of reaction for converting cyclohexanone oxime to ε-caprolactam in the presence of the above zeolite or non-zeolite substance and a regeneration process for regenerating the above zeolite or non-zeolite substance of which activity is reduced by treating it under a non-oxidizing gas atmosphere at 100-600 deg.C.

公开(公告)号：JP2001213862A

公开(公告)日：2001-08-07

申请号：JP2000020229

申请日：2000-01-28

Applicant: SUMITOMO CHEMICAL CO

Inventor： WOLFGANG HOELDERICH ,  GERD DAHLHOFF ,  GEORG PHILIPP HEITMANN ,  ICHIHASHI HIROSHI

IPC: C07D223/10 ,  B01J29/06 ,  B01J29/40 ,  B01J37/02 ,  B01J37/30 ,  C07B61/00 ,  C07D201/04

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing ε-caprolactam from cyclohexanone oxime under vapor-phase reaction condition using a solid catalyst in improved conversion of cyclohexanone oxime and selectivity of ε-caprolactam and provide a catalyst therefor. SOLUTION: The objective solid catalyst comprises a zeolite catalyst having boron oxide film evaporated on the surface or a zeolite catalyst obtained by treating a zeolite produced by hydrothermal synthesis with an alkali and calcining the product in air.

公开(公告)号：JP2000256309A

公开(公告)日：2000-09-19

申请号：JP5698099

申请日：1999-03-04

Applicant: SUMITOMO CHEMICAL CO

Inventor： WOLFGANG HOELDERICH ,  GEORG PHILIPP HEITMANN ,  GERD DAHLHOFF ,  ICHIHASHI HIROSHI

IPC: C07D201/04 ,  B01J29/40

Abstract: PROBLEM TO BE SOLVED: To simply produce the subject lactam useful for nylon, or the like, at a high addition ratio and a high selectivity and at a low cost according to a vapor-phase Beckmann rearrangement reaction by using a crystalline zeolite subjected to a specific treatment as a catalyst. SOLUTION: (B) A crystalline zeolite treated with (A) an acidic aqueous solution at pH 1-3 is used as a catalyst when producing ε-caprolactam from cyclohexanone oxime using the crystalline zeolite as the solid catalyst under vapor-phase reactional conditions. The component A is preferably an aqueous solution of an inorganic acid, especially at least one kind selected from the group consisting of hydrochloric acid, hydrofluoric acid, sulfuric acid and nitric acid and the hydrochloric acid is especially preferably used. Furthermore, the component B prepared by treating the component B having a decreased activity with the component A at pH 1-3 is preferably used as the catalyst. A