Abstract:
Synthesis Precipitated Calcium Carbonate have done using lisin as source of amino acid with
modification of caustic soda method. The limestone are first calcinated by XRF to analysis
composition of limestone. The result showed CaO of limestone 55,26%. Analysis using FT-IR
proved a pure crystal without contain lisin. Analysis using XRD showed optimum peak
2θ = 29,48300 .The particle size of lisin 0,05 M 68,56 nm with 88.21% calsit and 11.79% vaterit
while particle size of Lisin 0.150 M 57.13 nm with 80.12% calsit and 19.89% vaterit. Based on
our research proved that lisin can be used as directing agent to produce PCC.
Key words: calcination, caustic soda , directing agent, lisin, PCC
