Complex sentence: The deposit is now property of Quimica del Rey, company that processes the minerals of the underground lagoon in order to produce the raw material, the sodium sulfate, which is used in the formulations of powder detergents.
Split into simpler sentences: The deposit is now the property of Quimica del Rey, a company that processes the minerals of the underground lagoon. The resulting sodium sulfate is used in the formulations of powder detergents.