Is it true that the solubility of potassium formate in water can reach 310g/100g?

 The solubility of a solid refers to the time when a certain amount of substance dissolved in 100 g of solvent reaches a saturated state when the temperature is constant. The quality of the dissolved substance and the solubility of different substances are different. For example, water and alcohol can be miscible with any ratio. Therefore, it is true that Chuandong Chemical tells you that potassium formate has a large solubility in water.


Everyone knows that the solubility of solid substances requires four elements: temperature, 100g solvent, saturation state, and unit (g). What is the solubility of potassium formate solid?


Temperature: Normal temperature (25℃)

100g solvent: potassium formate has a density of 1.91 and has a slight smell of formic acid. Easily soluble in water and glycerin, slightly soluble in ethanol.

Saturated state: The viscosity of the saturated potassium formate solution is 10.9 cp. The formate aqueous solution can maintain a low viscosity even at high density and will not cause an increase in the viscosity of the drilling fluid.

Unit(g): The solubility of potassium formate in water is very large, and the solubility increases with the increase of the atomic weight of alkali metals. The saturation concentration of potassium formate can reach 76%, and it dissolves quickly.


Therefore, the solubility of potassium formate at room temperature (25°C.) is 310g/100g of water.


With the continuous expansion of oil extraction capacity, the demand for potassium formate is also increasing. The amount of potassium formate in each well is dozens of tons, which is in great demand. Potassium formate can achieve lower aqueous solution activity. In the presence of a semi-permeable membrane, the activity of drilling and completion fluids is an important factor in maintaining formation stability. NaCl and CaCl2 are basically saturated when the concentration reaches about 30-40%. The solubility of potassium formate is higher, reaching more than 76%. This shows that a lower solution activity can be achieved, thereby having a better suppression operation, which is very important for the stability of the well wall.

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