A four-bed and six-bed vacuum pressure swing adsorption (VPSA) process with silical gel were proposed to separate and purify N₂O from adipic acid tail gas (N₂O/N₂/O₂ = 0.3933/0.5657/0.041 mol%) in nylon plants and then the N₂O could be rectified to produce ultra-high purity N₂O. The four-bed VPSA process was developed to study the relationship between vacuum pressure and simulation performances, the resulting recovery of N₂O exceeds 90% with a purity over 95%. Meanwhile, the six-bed process was designed to explore the effects of vacuum and feed flow rate. The results indicated that a 95.55% purity N₂O stream is attained for a process N₂O recovery of 97.45%, when the feed flow rate was 1434.8 NL/s and vacuum pressure was 0.247 bar and N₂O energy was 4.95 KJ/mol N₂O respectively.

提出了采用硅胶的四床六床真空变压吸附（VPSA）工艺从己二酸尾气中分离纯化N ₂ O（N ₂ O / N ₂ / O ₂  = 0.3933 / 0.5657 / 0.041 mol ％）在尼龙植物则n ₂ O的程序可能整流以产生超高纯ñ ₂ O的四床VPSA方法的开发是为了研究得到的N个恢复真空压力和仿真性能之间的关系，₂ ö超过90％，纯度超过95％。同时，设计了六床工艺来研究真空和进料流速的影响。结果表明纯度为95.55％的N ₂当进料流速为1434.8 NL / s，真空压力为0.247 bar，N ₂ O能量为4.95 KJ / mol N ₂ O时，获得的O物流的N ₂ O回收率为97.45％。