METHOD FOR THE SELECTIVE PRODUCTION OF N-METHYL-PARA-ANISIDINE

摘要

The invention “Method for selective synthesis of N-methyl-para-anisidine” relates to chemical technology processes, namely to catalytic alkylation of aromatic amines and nitro compounds.;The invention relates to the method for synthesis of N-methyl-para-anisidine (N-methyl-para-methoxyaniline; N-methyl-para-amino anisole) from para-anisidine (para-amino anisole; para-methoxyaniline) or para-nitro anisole (1-methoxy-4-nitrobenzene) and methanol in the presence of hydrogen or without hydrogen on heterogeneous catalyst.;Proposed method permits to use existing process plants used for obtaining aniline and 14-methylaniline.;The invention purpose is to provide the possibility to produce N-methyl-para-anisidine with purity at least 98% and high output that allows arrangement of highly profitable industry-scale manufacturing process.

主权项

1. The process for synthesis of N-methyl-para-anisidine, consist in that N-alkylation of para-nitroanisole and/or para-anisidine is performed in vapor phase on dehydrogenating catalyst at a temperature 180-260° C. and atmospheric pressure with subsequent product isolation using rectification.