Available Services - Bleaching
The main objective of bleaching is to produce a brighter pulp. This is accomplished in chemical pulps primarily through lignin removal. The removal of other compounds is another objective of the bleaching process. These compounds include resins, fatty acids and other extractives.
UMaine can perform a wide range of laboratory scale pulp bleaching sequences. Both TCF and ECF sequences are routinely performed. Oxygen delignification and hydrogen peroxide bleaching at high temperature and high pressure are carried out in reactor vessels. Ozonation at high consistency takes place in a rotating glass vessel. For liquid bleaching agents, the more conventional technique involving polyester bags is used.