己二腈生产技术的研究进展

Research progress of adiponitrile production technology

己二腈是工业上合成尼龙66的重要的中间体,目前世界上主流的合成路线主要有两种:丙烯腈电解二聚法与丁二烯直接氢氰化法。本文着重对这两种工艺路线的技术特点与化学反应原理做了详细的介绍,并对两种工艺做了比较。结果表明丙烯腈电解二聚法优点在于工艺过程简单,但其电解费用和丙烯腈价格限制了该工艺的发展,丁二烯直接氢氰化法虽然采用剧毒且易挥发的氰化氢为生产原料,且在催化剂的制备、回收与再生方面技术难度高,但是在能耗、原料成本、产能方面,丁二烯法相比丙烯腈电解二聚法更有优势,具有更好的市场竞争力,是我国己二腈生产技术中优先发展的方向。

Adiponitrile is an important intermediate for producing nylon 66, and can be synthesized by electrolysis-dimerization of acrylonitrile or Hydrocyanation of 1,3-butadiene. The technology characteristics and chemical reaction principles have been introduced in detail in this paper. And the two production technologies of adiponitrile are also compared with each other. The results show that the electrolysis-dimerization process is simpler,but the high cost in electrolysis and raw material has limited its development.While the hydrocyanation process is a more complex technology in the preparation, recovery and regeneration of the catalyst, and uses volatile and highly toxic hydrocyanic acid as raw material, it is more advantageous in energy consumption, raw material costs and production capacity. So, the hydrocyanation process is a prior development direction for producing adiponitrile.