System and method for continuously producing paranitroaniline

• Main Authors: DING XIANGBO, LI HONGXUN, SUN DEZHEN, KANG HAOFU, ZHAO CONG, SONG LINRONG, CAO XIANRUI
• Format: Patent
• Language: Chinese; English
• Published: 02.07.2024
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention belongs to the technical field of chemical synthesis, and particularly relates to a system and a method for continuously producing paranitroaniline, the system for continuously producing paranitroaniline comprises a first-stage mixing unit, a second-stage mixing unit, a third-stage pipeline mixer, a flash tank and a cyclone hydraulic separation device which are arranged in sequence; a third-stage mixed material inlet and a third-stage mixed material outlet are formed in the third-stage pipeline mixer; a flash evaporation material inlet is formed in the middle of the flash evaporation tank, a flash evaporation liquid phase outlet is formed in the bottom of the flash evaporation tank, and a flash evaporation gas phase outlet is formed in the upper part of the flash evaporation tank; the cyclone hydraulic separation device comprises a separator and a first-stage charging barrel, a first-stage charging barrel inlet is formed in the upper portion of the first-stage charging barrel, a first-stage liqu