how long does bone char last
In general, bone char may last for five to 10 years, depending on the volume of raw material filtered through it and the level of impurities in the sugar. The bone char may be rejuvenated several times by burning it at 9,500 degrees in a kiln for 20 minutes, but this typically occurs only once.undreds of years ago, sugar refiners discovered that bone char from cattle worked well as a whitening filter, and this practice is now the industry standard. Sugar cane has held an approximately 50 percent market share of sugar in recent history, with sugar from sugar beets taking the rest.