Poly lactic acid production using the ring opening polymerization (ROP) method using Lewis acid surfactant combined iron (Fe) catalyst (Fe(DS)).

LASC catalyst synthesis process was carried out using iron metal (Fe) and its characterization properties were tested. There are five stages carried out, namely, the manufacture of the LASC Fe(DS)3 catalyst, lactic acid dehydration, polycondensation of lactic acid into l-lactic acid oligomers (OLLA), depolymerization of oligomers into l-lactide, and the ROP process to convert l-lactide into Polymers. l-lactic acid (PLLA).

Initial extraction of sodium silicate from sidoarjo mud by alkaline fusion and water leaching.

Sodium Silicate is a chemical compound that has properties such as water glass is a colorless, soluble in water, and is widely used in industry. Therefore, the extraction of sodium silicate by alkaline fusion is followed by water leaching. The alkaline fusion process is a technique that is often used and can further simplify the extraction process.