Patent ID: 9580639
Date: 2017-02-28
CPC Classifications: C09K

Claim:
1. A method of producing a sparingly soluble sulfonate-metal salt particle comprising the steps of: introducing an aqueous solution containing a metal ion salt into a reactor; introducing a non-aqueous solution containing a sulfonate surfactant and a polymer into the reactor, where the non-aqueous solution is introduced to the reactor with vigorous stirring of the aqueous solution; and operating the reactor such that the sparingly soluble sulfonate-metal salt particle forms from the interaction of the metal ion from the salt, the sulfonate surfactant and the polymer in an aqueous solution; where the sparingly soluble sulfonate-metal salt particle has an average particle size diameter in a range of from about 50 nm to about 450 nm, and where the sparingly soluble sulfonate-metal salt particle is sparingly soluble in water at room temperature.