Hexamethylenediamine (HMDA), a chemical for producing nylon, was produced on Raney Ni and Raney Co catalysts via the hydrogenation of adiponitrile (ADN). HMDA was hydrogenated from ADN via 6-aminohexanenitrile (AHN). For the two catalysts, the effects of five different reaction parameters (reaction temperature, H₂ pressure, catalyst loading, and ADN/HMDA ratio in the reactant) on the hydrogenation of ADN were investigated. Similar general trends demonstrating the dependence of ADN hydrogenation on the reaction conditions for both catalysts were observed: higher temperature (60–80 °C) and H₂ pressure, as well as lower ADN/catalyst and ADN/HMDA ratios, led to higher HMDA yields. A further increase in temperature from 80 to 100 °C increased the HMDA yield from 90.5 to 100% for the Raney Ni catalyst, but did not affect the HMDA yield (85~87%) for the Raney Co catalyst. A 100% HMDA yield (the highest yield reported to date) was also achieved via ADN hydrogenation over the Raney Ni catalyst, with a high HMDA content in the reactant (e.g., ADN/HMDA volumetric ratio of 0.06). No sign of metal leaching into the product solution was found, meaning that the Raney Ni and Raney Co catalysts were stable during ADN hydrogenation.

中文翻译：

---

在阮内镍和钴催化剂上将己二腈加氢成六亚甲基二胺

六亚甲基二胺（HMDA）是一种用于生产尼龙的化学品，是通过己二腈（ADN）的氢化作用在Raney Ni和Raney Co催化剂上生产的。HMDA通过6-氨基己腈（AHN）从ADN氢化。对于这两种催化剂，研究了五个不同的反应参数（反应温度，H ₂压力，催化剂负载以及反应物中的ADN / HMDA比）对ADN加氢的影响。观察到相似的一般趋势表明两种催化剂的ADN加氢反应均依赖于反应条件：较高的温度（60–80°C）和H ₂压力以及较低的ADN /催化剂和ADN / HMDA比，导致较高的HMDA收率。温度进一步从80提高到100°C，阮内镍催化剂的HMDA产率从90.5增加到100％，但不影响阮内Co催化剂的HMDA产率（85〜87％）。通过在阮内镍催化剂上进行ADN加氢也达到了100％HMDA收率（迄今为止报道的最高收率），反应物中的HMDA含量很高（例如ADN / HMDA体积比为0.06）。没有发现金属浸入产物溶液的迹象，这意味着阮内镍和阮内钴催化剂在ADN加氢过程中是稳定的。