Process for producing inorganic spheres

A process for producing inorganic spheres, comprising:

• preparing an emulsion by injecting
• an alkaline aqueous liquid containing an inorganic compound into
• a laminar flow of an organic liquid containing a surfactant and running at
• a flow rate of from 0.001 to 2 m/s
• in a flow path compartmentalized by at least one diaphragm through micropores penetrating through one diaphragm in its thickness direction to form a W/O emulsion containing droplets of the aqueous liquid containing said inorganic compound;
• separating an organic liquid (A) from the W/O emulsion containing droplets of the aqueous liquid containing said inorganic compound:
• solidifying said droplets of the aqueous liquid containing said inorganic compound in said W/O emulsion by using an acid to form a liquid containing said inorganic spheres;
• separating said liquid containing said inorganic spheres into an organic liquid (A′) and said inorganic spheres, and
• deacidifying the organic liquid (A′) and recycling the organic liquid (A′) to said laminar flow of said organic liquid in said flow path;
• contacting said organic liquid (A) with an acid,
• deacidifying said organic liquid (A);
• and
• recycling the organic liquid (A) to said laminar flow of said organic liquid in said flow path.