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用降低硫酸浓度和滴加速度的方法,可使磷化锌饼剂缓慢地释放出磷化氢气体。使用硫酸的浓度范围为6.4～6.9％,反应温度低于36℃反应时间约为7—48小时。这个方法可用在仓库熏蒸上。
By reducing the concentration of sulfuric acid and dropping speed, zinc phosphide cake can be slowly released phosphine gas. The concentration of sulfuric acid used ranges from 6.4 to 6.9%, the reaction temperature is below 36 ° C and the reaction time is about 7 to 48 hours. This method can be used in warehouse fumigation.