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最近我厂清理一批已变质的磺胺(SN)片,大部已变成黑白花斑片片子,但又不像是霉片,很可能是混了其他药品而变质的,因为时间隔得太久,已无法查出变质的原因。为了节约原料,减少浪费,我们决定进行回收。由于磺胺片中含有约8%左右的淀粉,淀粉遇氢氧化钠、盐酸或水都会膨胀,遇55℃以上的热水还会糊化,所以想用普通一般的氢氧化钠、盐酸或水从磺胺片中分离出磺胺来,因过滤极其困难,甚至无法过滤而没有成功。后来,经过我们多次试验,认为用石灰代替氢氧化钠可以从磺胺片中分离出磺胺来,当石灰浆加
Recently, our factory cleaned up a group of deteriorated sulfonamide (SN) tablets, most of which have become black and white plaque tablets, but not like mildew tablets, it is likely to be mixed with other drugs and deterioration of the time interval too For a long time, can not detect the cause of deterioration. In order to save raw materials and reduce waste, we decided to recycle. Because sulfa tablets contain about 8% of the starch, starch met with sodium hydroxide, hydrochloric acid or water will swell, in case of hot water above 55 ℃ will be gelatinized, so I want to use ordinary sodium hydroxide, hydrochloric acid or water from Sulfonamides isolated Sulfonamide, due to filtration is extremely difficult, not even impossible to filter without success. Later, after our many experiments, it was considered that sulfonamide can be separated from sulfanilamide tablets by using lime instead of sodium hydroxide, and when lime mortar