How to purify magnesium sulfate heptahydrate

When we use magnesium sulfate heptahydrate at ordinary times, we need to put forward requirements for its purity according to the environment of use. In the process of ordinary use, how should we purify magnesium sulfate heptahydrate?

1, to improve the purity of magnesium sulfate heptahydrate raw materials, buy or make high-purity raw materials. If the purity of the raw material is not high or even contains impurities, then the quality of the finished product can be imagined that the purity will not be high.

2, secondly, do not mix other substances in the reaction process, including gases, to prevent gases from oxidizing substances in the reaction process and even other reactions.

3, and then after the reaction according to the need for filtration, purification and other operations. Take magnesium sulfate heptahydrate as an example, the industrial magnesium sulfate heptahydrate is added to the hot distillation tank containing 80-90 ° C, heating while stirring, dissolved to a mass concentration of 1.21 g/cm2, remove arsenic, heavy metals and other impurities with alkali, after filtration, decolorization with activated carbon, concentrated to a mass concentration of 1.370g/cm2-1.384g/cm2, cooling crystallization, When the temperature reaches 25-15 ℃, it is separated and washed, and dried by vibrating fluidized bed at 50-55 ℃. According to the difference of water quality, impurity removal, decolorization and washing degree, different grades of high purity magnesium sulfate heptahydrate are obtained.

When we purify magnesium sulfate heptahydrate, we need to treat its purity and other conditions to use it, and do a good job of using the amount of ingredients, so that the production can be improved in the later stage.

The above content is provided by Jiangsu Mineng Biotechnology Co., LTD., a food additive magnesium sulfate manufacturer