Separation process system for high-purity monomethylamine

The utility model belongs to the field of monomethylamine separation, and particularly relates to a separation process system for high-purity monomethylamine. Comprising a dimethylamine tower and a monomethylamine tower, after dimethylamine is extracted from the side line, monomethylamine is purified, and dimethylamine carried out by the monomethylamine can return to the dimethylamine tower for continuous treatment; according to the process system, the purity of the existing monomethylamine product is improved from 96% to 99.9%, meanwhile, the productivity of the whole methylamine device is improved, and the energy consumption is reduced. Dimethylamine meets the requirements of superior products. 本实用新型属于一甲胺分离领域，具体涉及一种高纯度一甲胺的分离工艺系统。包括二甲胺塔、一甲胺塔；二甲胺侧线采出后对一甲胺纯化处理，其带出的二甲胺可以返回至二甲胺塔继续处理；该工艺系统将现有的一甲胺产品纯度由96%提高到99.9%，同时提高整个甲胺装置的产能，降低能耗。二甲胺则符合优等品的要求。