Anthraquinone is a digester additive used to benefit the digester and recovery operations in a variety of ways. Kemira’s KemAQ is an ultra-high purity micronized aqueous slurry of anthraquinone (AQ) with concentrations of 30, 50 and 60%.

During alkaline pulping (kraft or soda), anthraquinone works via reduction/oxidation (REDOX) reactions to produce two important effects:

  • An increase in the rate of delignification
  • Protection of the cellulosic material against alkaline degradation reactions (i.e., the peeling reaction)

KemAQ has various benefits to the pulping process, with yield increase being the most important one. KemAQ can increase yield 0.8-1.5% with dosages in the range 0.02 to 0.05%. Yield increases depend on factors such as operating conditions, wood type, wood source, age of chips, digester type, etc.

Kemira KemAQ is currently sold only in Canada.

We use cookies to improve your experience on our website. Read more about our cookie policy and privacy statement.