Abstract: A foaming device for generating and dispensing foams formed by mixing air or other gas with a foamable liquid having a high solids content under pressures of a magnitude on the order of pressures developed by manual collapse of an elastomeric bottle. The device includes a continuous passageway extending from a point of submergence in liquid to be foamed through the gas to be mixed with the liquid to a discharge opening, that portion of the passageway located in the gas being formed of a porous tube by which gas under pressure will be introduced to liquid passing upwardly through the passageway under the same pressure and mixed therewith. A flow restriction in the form of a static mixer is located in the passageway at a point to be coextensive with or elevated above the level of the porous tube.

Abstract: A process is provided to form spherical thermoplastic particles that involves dispersing a thermoplastic powder in a liquid that is a partial solvent for the thermoplastic, breaking the dispersion into droplets, forming thermoplastic spheres by heating the droplets to a temperature sufficient to at least partially solubilize the thermoplastic and to evaporate the solvent. Unique products, including porous structures, may be produced from material formed by this process.

Abstract: A method of making sized refractory spheroids of magnesium oxide having consistent electrical resistance properties directly from particulate magnesium ore without crust and substantially free from contaminates by feeding particulate magnesium ore from a supply reservoir into a plasma zone of a plasma generator capable of melting particulate solids from the outside inwardly. The melted particles of the refractory magnesium ore are collected directly from the plasma zone in individual particulate and substantially spherical forms.