【摘要】 加拿大和苏联等国实验用TEACO₂单频和多频红外激光,从二氟一氯甲烷（CKCIF₂）中分离¹³C同位素,已经获得成功。与其他分离方法相比,其选择性高,能耗低,过程简单。采用二级分离,可将天然丰度1.1%的¹³C浓集至95%以上,而生产成本估计不到常规法的30%。CKClF₂来源丰富且价廉,在工业上常作为生产C₂F₄及其聚合物的原料。通过红外激光分离出其中所含天然丰度为1.1%的¹³C后,其余98.9%的¹²CHCIF₂仍可作为聚四氟乙烯的生产原料,这样可得高值副产品(高浓¹³C),从而可增加聚四氟乙烯生产的经济效益。文中介绍了激光化学法从CHCIF₂中分离¹³C同位素的机理、实验和验证、与其他分离方法的比较、以及最新进展。更多还原

【Abstract】 Canada and the USSR and other contries have succeded in experiment of separating C-13 from chlorodifluoromethane （CHCIF₂）, using TEA CO₂ in single-and multiple-frequency irlaser fields. Compared with other separation processes this method has advantage of high selectivity, low energy consumption and simple manipulation. When using a two stage separation process, C-13 with a natural abundance of 1.1% can be enriched to more than 95%, yet the production cost is estimated to be less than 30% of conventional processes. chlorodifluoromethane is cheap and rich in supply and is usually used in industry as raw material for manufacture of C₂F₄ and its polymer. After the separation of 1.1% of C-13, which is the natural abundance content, the remaining 98.9% of ¹²CHCIF₂ can still be used as raw material for the production of polytetrafluoroethylene. with highly enriched C-13, obtained as a by-product the economic result of polytetrafluoroethylene production is subsequently enchanced. This article describes the mechanism of separation of C-13 from CHCIF₂ by laser chemistry process, experiments of separation and check, the comparison with other separation processes and the latest deve（?）opment at present.更多还原