KR930009992A - Method for producing ε-caprolactam - Google Patents

Abstract

The present invention discloses a method for producing epsilon caprolactam by contacting a cyclohexanone oxime with a solid catalyst in the presence of ammonia, methylamines and at least one nitrogen-containing compound selected from epsilon caprolactam.

Description

Method for producing ε-caprolactam.

Since this is an open matter, no full text was included.

Claims (18)

A method for producing epsilon -caprolactam, comprising contacting a cyclohexanone oxime with a solid catalyst in the gas phase in the presence of at least one nitrogen-containing compound selected from ammonia, methylamines, and epsilon -caprolactam. The process for producing ε-caprolactam according to claim 1, wherein the solid catalyst is zeolite. The method for producing ε-caprolactam according to claim 1, wherein the zeolite is a crystalline metal silicate. The method for producing ε-caprolactam according to claim 3, wherein the Si / metal atomic ratio of the crystalline metal silicate is 5 or more. 5. The metal of claim 4, wherein the metal described above is selected from Al, Ga, Fe, B, Zn, Cr, Be, Co, La, Ge, Ti, Zr, Hf, V, Ni, Sb, Bi, Cu, and Nb. Method for producing ε-caprolactam characterized in that at least one or more. The method for producing ε-caprolactam according to claim 2, wherein the zeolite is crystalline silica. The method for producing ε-caprolactam according to claim 2, wherein the zeolite has a pentasil structure. The method for producing ε-caprolactam according to claim 1, wherein the amount of the nitrogen-containing compound is 10 times or more in molar ratio with respect to the supply amount of cyclohexanone oxime. The general formula (1) according to claim 1, wherein the reaction system is R ¹ -OR ₂ Ε-, it characterized in that the coexistence of the compound represented by (wherein, R ¹ is optionally substituted with a fluorine atom represents a good lower alkyl group, R ² is optionally substituted hydrogen atom, a fluorine atom shows a good lower alkyl group or a phenyl group.) Process for preparing caprolactam. The method for producing ε-caprolactam according to claim 9, wherein the compound represented by the general formula (1) is an alcohol having 6 or less carbon atoms. The method for producing ε-caprolactam according to claim 10, wherein the alcohol having 6 or less carbon atoms is at least one selected from methanol and ethanol. The process for producing ε-caprolactam according to claim 1, wherein the reaction temperature is 250-500 ° C. The process for producing ε-caprolactam according to claim 1, wherein the reaction pressure is 0.05-10 kg / cm 2. The method for producing ε-caprolactam according to claim 1, wherein the space velocity of cyclohexanone oxime is 0.1-40 hr ⁻¹ . The method for producing ε-caprolactam according to claim 1, wherein the zeolite catalyst is a calcined zeolite catalyst having reduced activity in a molecular oxygen-containing gas. The process for producing ε-caprolactam according to claim 15, wherein the molecular oxygen-containing gas is air. The method for producing ε-caprolactam according to claim 15, wherein the molecular oxygen-containing gas contains an alcohol. 18. The process for producing epsilon caprolactam according to claim 17, wherein the alcohol is methanol. ※ Note: The disclosure is based on the initial application.