poor in F and highly soluble in citric acid is produced by calcination of a mixt. of (A) crude phosphate, (b) phosphoric acid, and (C) a cpd. forming Na2O at temps. 1200 degrees C in the presence of H2O vapour, in which (A) contains 2% wt. SiO2; (A), (B), and (C) are granulated together so that in the product the molar ratio will be 8:1:3, the granules are dried and calcined at 1350-1550 degrees C. The mixt. may contain 5-25% (C). (C) may be Na2CO3 and/or NaOH in soln. The product is used as a fertiliser and in animal feeds.
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机译：混合物煅烧可生产出氟含量低而易溶于柠檬酸的产品。 （A）粗磷酸盐，（b）磷酸和（C）a cpd。在温度下形成Na2O。在H2O蒸气存在下1200摄氏度，其中（A）包含2％wt SiO2;将（A），（B）和（C）一起制粒，以使产物中的摩尔比为8：1：3，将颗粒干燥并在1350-1550摄氏度下煅烧。混合。可能含有5-25％（C）。 （C）可以是在溶液中的Na 2 CO 3和/或NaOH。该产品用作肥料和动物饲料。
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