What is the dissolution condition of sodium tripolyphosphate(STPP)?
Editor：川东化工Time：2019-04-16Hits：
Sodium tripolyphosphate(STPP) is synthesized by neutralizing phosphoric acid with sodium orthophosphate and condensation. STPP is soluble in water and its aqueous solution is alkaline. So, what is the dissolving condition of STPP?
First, try to gradually heat the STPP. With the increase of temperature, STPP will have a stronger solubility. Usually, as the temperature of the dissolving environment increases, the insoluble STPP will gradually dissolve in water and become clear.
Second, add stirring. STPP is usually a mixture of type I and type II. Among them, type I dissolves rapidly in the process of dissolution heat and is easy to produce small pieces. It is more convenient to dissolve when adding under stirring, and it can also solve the problem of turbidity of solution.
Third, if heating and stirring still do not meet the requirements. It is necessary to consider the purity and quality of raw materials. Industrial STPP is widely used and relatively valuable. Some illegal businessmen can easily add low-value products such as pasta powder and soda ash, or directly add other impurities to make it unable to dissolve properly. Some manufacturers only guarantee the main content of the production process, while other indicators can easily lead to this result.
STPP of CDchem is produced by thermal process with high purity, less impurities and more stable quality.
