Production method and production system of high-purity m-xylylenediamine

• Main Authors: LI MINGQUAN, HUANG JIE, GAO YI, ZHANG FEI, XIAO JIA, JIA FENGGANG
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention discloses a production method and a production system for high-purity m-xylylenediamine, and the production method comprises the following steps: S1, taking m-xylene, ammonia gas and air as raw materials, carrying out a reaction in the presence of a first catalyst to obtain a mixed gas, and dissolving the mixed gas in a solvent to form a solution, S2, carrying out suspension crystallization on the solution obtained in the step S1 to obtain m-xylylenediamine crystals, and S3, carrying out crystallization on the m-xylylenediamine crystals to obtain the high-purity m-xylylenediamine. S3, carrying out hydrogenation reaction on the isophthalonitrile crystals and liquid ammonia which serve as raw materials in the presence of a second catalyst to obtain a reaction solution; and S4, carrying out melt crystallization on the reaction solution obtained in the step S3 to obtain m-xylylenediamine. The intermediate product isophthalonitrile is purified through suspension crystallization, the m-xylylenediamine