PCC stands for precipitated calcium carbonate. It is a manufactured form of calcium carbonate made under exacting conditions in order to obtain crystals of the proper shape, size and physical characteristics needed for a host of sophisticated uses. Graymont operates two plants that manufacture this product; one in Tacoma, Washington and the other in St. Helens, Oregon.
The process is actually very simple. First, Graymont takes the finest lime available, which is calcium oxide, custom made for this process by one of its lime manufacturing facilities. The calcium oxide is mixed in water and pumped to the reaction vessel. Then CO2 rich gas is introduced into the mix to come up with PCC. The reaction is as follows:
CaO + H2O —> Ca(OH)2 , and Ca(OH)2 + CO2 —> CaCO3 + H2O
Of course this is all done using the latest state of the art equipment and control technology.
Graymont has the ability to manufacture a wide range of products that can be tailored for each customer's use. Contact Graymont to see how your calcium carbonate needs can be met.