We all know that there are two types of diammonium phosphate currently on the market. One is diammonium phosphate with a content of 57%, and the other is diammonium phosphate with a content of 64%. What is the difference between the two diammonium phosphates?
Which one is more suitable?
The differences between the two are mainly reflected in the following three aspects:
First, the nutrient content is different. Both diammoniums contain only nitrogen and phosphorus and no potassium. Among them, 57% diammonium phosphate contains 15% nitrogen and 42% phosphorus pentoxide; while 64% diammonium phosphate contains 18% nitrogen, 46% phosphorus pentoxide and 64% diammonium phosphate. Total nutrient content is higher.
Second, the production process is different. 57% diammonium phosphate is generally produced using the slurry method. That is, after extracting phosphoric acid from phosphate rock powder with dilute sulfuric acid, ammonia gas is directly introduced, and then concentrated to produce diammonium phosphate, which has low purity and low nutrient content. 64% of diammonium phosphate is mostly produced using traditional methods. That is, dilute sulfuric acid is first added to the phosphate rock powder to extract phosphoric acid, and then the phosphoric acid is concentrated, and a large amount of insoluble matter and impurities in the phosphoric acid are discharged. Then ammonia gas is introduced. Therefore, the diammonium produced by the traditional method has fewer impurities, high purity, and wide use.
Third, the prices vary greatly. 57% diammonium phosphate has a simple production process, low nutrient content, many impurities, and is relatively cheap. The current retail price is generally 18.5$ per bag; while 64% diammonium phosphate requires concentrated phosphoric acid first, and the production process is complex and difficult. , diammonium has high purity and its sales price is relatively high. The current retail price is generally 185$ per bag.
It can be seen from the two production methods of diammonium phosphate that 64% diammonium phosphate has a wider range of uses due to its difficult production process, high purity, and better quality. It can not only be used for cereal crops such as wheat, rice, and corn. It can also be used for legume crops that require more phosphorus.
