METHOD FOR MAKING A NANOPOROUS GRANULAR MATERIAL AND A DETERGENT COMPOSITION

摘要

A process for producing a starting material in a granular form and in a nanoporous anhydrous state, a process for improving the water-solubility and controlled release characteristics of a detergent material, and a detergent composition are disclosed. In one aspect, a process for producing a starting material in a granular form and in a nanoporous anhydrous state includes obtaining a starting material in a form of a dispersion or solution in a sublimable solvent or mixtures of sublimable solvents, forming graded drople ts by atomization, freezing the graded droplets in a freezing medium at a controlled freezing rate of a least 100 ~C per second to form frozen droplet s and drying the frozen droplets by vacuum sublimation to obtain freeze-dried granules of the starting material in a nanoporous anhydrous state. The starting material in dispersion or solution form has a viscosity suitable fo r atomization and formation of graded droplets.