用磷铵为原料制备磷酸锌铵和磷酸亚铁铵混合缓溶微肥的工艺研究

本文研究了以磷酸氢二铵、硫酸锌、硫酸亚铁和氨为原料制取锌、铁混合缓溶微肥的最佳工艺条件，认为反应温度应控制在９０℃，Ｐ／（Ｆｅ＋Ｚｎ）摩尔比取１．１，Ｚｎ／Ｆｅ摩尔比取１～２，反应过程应先加硫酸锌而后加硫酸亚铁。硫酸锌和硫酸亚铁由化肥厂废触媒等制取。由最优工艺条件小试结果表明，磷的转化率大于９０％．锌和铁的转化率大于９５％。该产品可作烟草专用肥的基础肥料。

缓溶微肥磷酸铵锌的研制

文章探讨了以温法磷酸、氧化锌及氨水为原料制取磷铵锌的最优工艺条件，即反应湿度９０℃；ｐＨ值７．０；反应时间１小时，ｐ／Ｚｎ比（摩尔比）１．２５．氧化锌采用回收废干电池制取．由最优工艺条件小试结果表明，所得产品ＺｎＮＨ４ＰＯ４的浓度在８５％以上；锌的转化率大于９５％．ＺｎＮＨ４ＰＯ４可以加入复合肥中作为专用肥的基础肥料．

固相反应合成多元微肥缓溶磷酸锌铵及其表征

以聚乙二醇-400(PEG-400)为模板,以硫酸锌和磷酸铵为原料经低热固相反应合成了缓溶磷酸锌铵多元微肥,用热重/差热(TG/DTA)、X射线衍射(XRD)和红外光谱对其主要产物进行分析表征。结果表明该主要产物为微溶的磷酸锌铵。该合成方法除了得到微溶的磷酸锌铵外,还得到可溶的硫酸铵或者硫酸氢铵,这些产物均是肥料。显然,用该合成法合成磷酸锌铵微肥时,无需分离,其产物混合物就可以作为肥料用。该合成法不仅合成的工艺甚为简洁,而且生产过程没有废水、废渣的产生,无论是从工艺上,还是环保上均比液相法具有优势,是一种颇具工业应用前景的合成法。

低热固相合成磷酸铵铜微肥及信噪比控制合成

A novel method for the synthesis of multi-micronutrient fertilizer ammonium cupric phosphate was studied,and the target product was obtained successfully with CuSO4·5H2O and(NH4)3PO4·3H2O as raw materials and PEG-400 as template via the one step low heat solid state reaction.SNR(signal-to-noise)calculated with XRD data of the products was used as testing indicators,and uniform experimental design as well as data mining technology were used in the test.The synthesis tests were carried out,and were guided by the results of data mining technology.The test results indicated that the product synthesized with the optimal technical condition was NH4CuPO4 ·H2O with size of 51nm.For the products are all fertilizer,so it is obvious that a mixture of the synthesis products can be used as fertilizer without any separation.The synthesis process is not only simple but also without any waste water,so the synthesis is a much more potential industrial process when it is compared with those syntheses in liquid state in view of the process itself or environment protection.

磷酸铵铜微肥的研制

本文探讨了以湿法磷酸，回收的氧化铜粉及氨水为原料制取微肥磷酸铵铜的最佳工艺条件，即反应温度６０℃，最初磷酸浓度是含２５％Ｐ２Ｏ５的水溶液，反应时间是６０分钟～９０分钟，溶液最终ｐＨ值为７，氧化铜粉采用铜院工序的铜污煅烧制得。由最佳工艺条件进行的小试生产结果表明：所得产品ＣｕＮＨ４ＰＯ４的纯度在８５％以上，铜的转化率大于９０％。