Verfahren zur Herstellung eines Zeolithformteils und Verfahren zur Herstellung von Epsilon-Caprolactam

Details

Veröffentlichungs-Nr.

EP2599748

Aktenzeichen

EP12194714

Anmeldetag

29. November 2012

Veröffentlichung

20. Mai 2020

Erteilung

20. Mai 2020

Rechtsraum

EP

IPC

C01B37/02B01J29/40B01J37/06C07D201/04

Abstract

The present invention provides a method for producing a zeolite molded article having an excellent mechanical strength. The method for producing a zeolite molded article according to the present invention comprises the following steps (1) to (5) : (1) subjecting a mixture containing a silicon compound, water, and a quaternary ammonium hydroxide to a hydrothermal synthesis reaction; (2) filtering the reaction mixture containing crystals obtained in the step (1) to separate it into a concentrate containing crystals and a filtrate; (3) washing the concentrate containing crystals obtained in the step (2) with water until the pH at 25°C of the washed solution obtained by washing becomes 8.5 to 9.5; (4) molding the crystals obtained in the step (3); and (5) calcining the molded article obtained in the step (4). By using as a catalyst the zeolite molded article produced by such a method, µ-caprolactam is produced by Beckmann rearrangement reaction of cyclohexanone oxime in a gaseous phase.

Anmelder

Firmen

Sumitomo Chemical Company, Limited
Sumitomo Chemical Company Limited

Land

🇯🇵 Japan

Fachgebiete