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浮生茶

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A neutral aqueous solution of cyanamide, or a solution made very slightly alkaline with ammonia, is evaporated a t reduced pressure to a concentration of a t least 20 per cent cyanamide. While the solution is still hot (70" C. or there-about), ammonia, either gaseous or in the form of aqua am-monia, is added in quantity sufficient to bring its concentra-tion within the range of 2.0 to 4.5 per cent.

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baoshanqiu

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浮生茶: 金币+10 2016-10-20 13:30:04
将氰氨的中性水溶液或用氨配制的略碱性溶液减压蒸发至浓度至少20%的氰氨。在溶液尚热(70"C 或左右)时,加入气态或液态氨足量使其浓度在2.0至4.5%范围内。
2楼2016-10-20 00:10:39
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