改性活性炭脱除阿斯巴甜粗品中羰基硫的工艺研究

Studies on Removing COS from Aspartame Products by Modified Active Carbon

报道了利用改性活性炭脱除Ｎ－硫代羰基酸酐（ＮＴＡ）法合成的阿斯巴甜粗品（Ａｓｐａｒｔａｍ ｅ）中混有的少量羰基硫（ＣＯＳ）。研究了改性后活性碳的吸附性能及浓度、温度、ｐＨ值及补氧等因素对脱除效果的影响，确定在温度６５℃、浓度４％ 、ｐＨ３．５并补加适量Ｏ２ 的条件下，脱除效果最佳，且产品的损失率不超过１％ 。

The technology of removing carbonyl sulfide (COS), which is contained in the products of Aspartame produced by N thiocarbonyl anhydride (NTA) method is reported. Some kind of modified active carbon was employed for its good performance in removing COS selectively. Optimum technology was found: temperature 65℃, pH 3.5, time 30 minutes, concentration of crude Aspartame 4% and addition of certain amount of oxygen, under which a perfect result of removing COS was achieved and the Aspartame loss was less than 1%.