Register Now
Dirt Inspection Charts
TAPPI Connect is your centralized networking & collaboration tool.
My TAPPI Story: Rory Wolf
TAPPISAFE
An acid-washed, oxygen-delignified, softwood kraft pulp was further delignified with peracetic acid (Pa) at initial pH 2.5, 4.8, and 7.0. The inclusion of 5 ppm on pulp of Mn (II), Fe (III), Cu (II), V (V) or Co (II) caused wasteful decomposition of Pa while Ni (II) had no effect. Pa utilization was lowest at pH 2.5 but the peracid was significantly decomposed by Fe (III), V (V), and Co (II). Free radical mechanisms that are partially responsible for V- and Co- induced decomposition are already in the literature. Those mechanisms involve the acetoxy and peracetoxy radicals. The dilute Pa solutions hydrolyzed to H2O2 and CH3COOH when delignification was performed at pH 2.5. The Haber-Weiss mechanism was operable for Fe 3+ /H2O2, a sizable amount of ·OH was generated, and the pulp viscosity was lower than for V(V) or Co (II).
Experience the Power of Publications in the 2024 TAPPI Press Catalog
Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.
The best-selling text to introduce the entire technology of pulp and paper manufacture.
A project of the Yankee Dryer Safety & Reliability Committee.
TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries.
Available for Purchase – Conference Proceedings
TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.
Role of pH and Fe (III) in Delignification with Distilled Peracetic Acid, 1998 Pulping Conference Pr
