I have an unusual problem regarding the properties of saturated brine containing both KCl and NaCl. This application is at a minesite, where a continuous flow of saturated brine has to be delivered down a 1,000m deep mine shaft from the surface. The fluid temperature at the surface will be 25 degrees C and the fluid will take about 3 minutes to traverse the shaft from top to bottom. The fluid will be subject to the pressure rise in the pipeline of about 100 bar, with no pressure relief at the shaft bottom. The literature that I find is plentiful regarding the effect of temperature on the equilibrium of the solubility of the salts in the fluid, but nowhere do I see what happens if the pressure is raised. My concern is the possibility of precipitation of any of the salts from the solution if the pressure is increased. I don't know why it would, but if it did, the project would have a 'fatal flaw', which obviously cannot be accepted.
Does anyone know of the effect of pressure (at constant temperature) on a saturated brine solution.