首页>
外国专利>
A method for the production of epsilon.sub.r - caprolactam by beckmann - rearrangement in the gas phase in the presence of a zeolite catalyst and of a nitrogen-containing compound
A method for the production of epsilon.sub.r - caprolactam by beckmann - rearrangement in the gas phase in the presence of a zeolite catalyst and of a nitrogen-containing compound