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US 8,282,773 B2Granted
Method and system to enhance fiber development by addition of treatment agent during mechanical pulping
AssigneeAndritz Inc.
InventorsJohann Aichinger, Marc Sabourin, Jan Hill, Johann Grossalber
Life of this patent
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Abstract
A mechanical pulping method including: defibrating a comminuted cellulosic material; mechanically refining the defibrated cellulosic material in a primary refining step; introducing to the cellulosic material at least one of a chemical agent and a biological during the defibration step or the mechanical refining step, and producing pulp from the refined and defibrated cellulosic material.
Claims5
A mechanical pulping method comprising:
- defibrating a comminuted cellulosic material in a pre-treatment step and first introducing a biological agent to the comminuted cellulosic material during the pre-treatment step and during or immediately upstream of the defibration of the comminuted cellulosic material;
- mechanically refining the defibrated cellulosic material in a primary refining step and first introducing a chemical agent into the defibrated cellulosic material during the primary refining step, and
- outputting a refined and defibrated cellulosic material from the primary refining step.
Dependencies are inferred from the claim text.