Method of recycling silicon components

A process for recovery of materials present in silicon-containing components comprising the following successive process steps:

• providing a silicon-dissolving alkaline solution in a reactor;
• adjusting a process pressure (p) in the reactor and an alkaline solution temperature (TL), which is in a range from 50° C. to less than a boiling temperature of the alkaline solution at the process pressure (p);
• supplying a silicon-containing component to the alkaline solution and dissolving silicon of the silicon-containing component in the alkaline solution to generate and maintain a first suspension temperature (TS1) and to form a suspension containing meta-, di-, and oligosilicates,
• wherein the first suspension temperature (TS1) is at least 50° C.;
• filtering the suspension to separate the meta-, di-, and oligosilicates from a filtrate at a second suspension temperature (TS2),
• wherein the second suspension temperature (TS2) of the suspension is maintained in a range from 50° C. to less than a boiling point of the alkaline solution during filtering.