CARBON DIOXIDE NEUTRALIZATION PULP AND PAPER PH PHARMACEUTICALS SCALING TITRATION

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Abstract

In Part 1 of this 2-part article series, we discussed the challenges of designing a waste neutralization/pH control project, especially for larger scale systems and provided an example from an integrated Kraft pulp and paper mill. The key focus areas required for success were identified as: 1. Chemistry; 2. Space-Time; 3. Mixing; 4. Controllability; and 5. Safety. Having covered the chemistry aspects with some focus on titration curves, we start Part 2 with a brief discussion of the use of carbon dioxide for alkaline waste neutralization and then tackle the remaining topics (2, 3, 4 and 5). Since chemical reactors can be the most expensive part of a waste neutralization/pH control system, it is important that we understand how they work and how to minimize the reactor volume or space-time for the desired conversion (acid-based neutralization). Optimizing the size of a pH system is first stop on the road to minimizing the capital cost.

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