氯醇法环氧丙烷含氧尾气的回收利用

以CO为还原剂，在复合脱氧催化剂FS的存在下，在列管式固定床反应器内利用一步深度脱氧技术将氯醇法环氧丙烷生产中氯醇化工序放出的含氧尾气（PO尾气）中夹带的体积分数为15％的O2转化为CO2。用模拟PO尾气、真实PO尾气的脱氧小试和工业应用试验考察了反应温度、体积空速、CO与O2的物质量的比、饱和水蒸气、丙烯等因素对催化剂活性的影响，和反应温度、CO与O2的物质量的比对丙烯、丙烷回收率的影响，以及催化剂的稳定性。试验结果表明：O2转化率能达到97％左右，脱氧后尾气中的O2体积分数小于0．5％，对PO尾气进行一步深度脱氧的工业化过程是可行的。根据大量的试验数据提出了工业化初步设计方案。

Recycle of oxygen-containing tail gas from propylene epoxide production by chlorohydrination process

The tail gas dicharged from chlorohydrination procedure in propylene epoxide （PO） production by chlorohydrination process contained O2 of 15% （vol.）. The O2 was converted into CO2 by reducing agent CO in the presence of composite deoxygenation catalyst FS in a tubular fixed bed reactor by using one-step deep deoxygenation technology. Small-scale deoxygenation tests of simulated PO tail gas and real PO tail gas and industrial experiments were carried out to investigate the influences of several factors such as reaction temperature, volume velocity, molar ratio of CO to O2, saturated steam and propylene on the activity of the catalyst, the influence of reaction temperature and molar ratio of CO to O2 on the recovery rate of propylene and propane, and to investigate the stability of the catalyst. The experiment results showed that the conversion of O2 reached about 97%, the volume fraction of O2 in deoxygenated tail gas was less than 0.5%, and it was feasible to deeply deoxygenate the PO tail gas in industry. A preliminary industrial design plan was proposed based on a great deal of experiment data.