檢視磷酸二铵的原始碼

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[[File:磷酸二铵.jpg|缩略图|居中|[https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fhope.sheyuan.com%3A8899%2Fimage%2Fupload%2Fstore%2F550%2F2015%2F12%2F09%2F0bca9f36-ba48-4d4c-8203-97c8a151bc34.jpg&refer=http%3A%2F%2Fhope.sheyuan.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1624588651&t=4e00988d8c0cab26892fb84692526c4c 原图链接][https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E7%A3%B7%E9%85%B8%E4%BA%8C%E9%93%B5&step_word=&hs=0&pn=0&spn=0&di=84150&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=2893995171%2C1104963036&os=4185601075%2C2747303674&simid=3379300853%2C406569187&adpicid=0&lpn=0&ln=1825&fr=&fmq=1621996642405_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fhope.sheyuan.com%3A8899%2Fimage%2Fupload%2Fstore%2F550%2F2015%2F12%2F09%2F0bca9f36-ba48-4d4c-8203-97c8a151bc34.jpg%26refer%3Dhttp%3A%2F%2Fhope.sheyuan.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1624588651%26t%3D4e00988d8c0cab26892fb84692526c4c&fromurl=ippr_z2C%24qAzdH3FAzdH3Fuwg-rtg_z%26e3Bv54AzdH3Fviwx7gAzdH3F15v-evepjkeej_z%26e3Bip4&gsm=1&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 来自 百度图片]]]

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'''中文名称''':磷酸二铵

'''外文名称''':diammonium phosphate

'''稳定性''':性能稳定

'''毒性''':无毒

'''分子量''':132.056

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磷酸二铵，是指标准产品含N18%，P2O548%，结晶形状为平斜棱晶，25C水中溶解度为71%，其饱和溶液的pH达到8，比磷酸一铵高得多。将磷矿粉在过量的NH，F溶液、pH6〜7、温度为100度:条件下进行反应，可制得磷酸二铵。但一般工厂采用的是美国田纳西流域管理局(TVA)开发的工艺流程，即采用氨中和混合磷酸(含P2a30%和54%两种浓度的磷酸混合)，将氨与磷酸分子比控制在1.4左右预中和，继续控制氨与磷酸分子比为2，通入氨蒸气并使溶液pH保持在7.5以上来制取磷酸二铵。由于磷酸二铵饱和溶液为碱性，施在酸性土壤上可以减少铁铝对磷的固定，使磷保持较高的有效性，故提倡磷酸二铵用在酸性土壤上。