System for preparing hexamethylenediamine and co-producing hexamethyleneimine through adiponitrile hydrogenation

The utility model relates to a system for preparing hexamethylenediamine and co-producing cycloheximine through adiponitrile hydrogenation, which comprises a mixer, a tubular reactor, a high-pressure separator, a low-pressure separator, a recycle hydrogen device and a rectifying tower separation unit, a feed port is arranged at the top of the tubular reactor and is communicated with a mixture outlet of the mixer, and the high-pressure separator is communicated with the low-pressure separator. The tubes of the tubular reactor are filled with an adiponitrile hydrogenation catalyst, the bottom of the tubular reactor is provided with a discharge port, and the bottom of the tubular reactor is sequentially communicated with the high-pressure separator, the low-pressure separator and the rectifying tower separation unit. The system disclosed by the utility model is simple and optimized, simple, convenient and safe to operate, capable of realizing continuous production, low in cost and high in product yield. 本实用新型涉及一