Patent ID: 7637651

Claim:
A process for making a mixture comprising: providing a liquid component and a solids component, the solids component having a specific gravity of 2.0-3.5 having particles with a diameter of 5-50 microns, the liquid component having particles comprising from 5-65% by weight based on the weight of the liquid component and a viscosity of 10-10,000 cps; introducing the liquid component into a mixing vessel having a set of pitched blade turbines, having an upper and a lower pitched blade turbine the pitched blade turbines positioned inside the mixing vessel according to the ratios: D/T 0.45-0.55, C/T 0.07-0.35, S/T 0.18-0.47, and H/T 0.09-0.65; adding at least 25% of the solids component into the mixing vessel; initiating an in-line rotor stator positioned to receive the mixture from the mixing vessel; and re-circulating the mixture from the mixing vessel through the in-line rotor stator and back to the mixing vessel; wherein D is the pitched blade turbine diameter, T is the mixing vessel diameter, C is the clearance from the mixing vessel bottom to the lower pitched blade turbine, H is the submergence of the upper pitched blade turbine, and S is the distance between the upper and lower pitched blade turbines, all in the same units of length.