Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Reexamination Certificate
2006-11-09
2010-12-21
Daniels, Matthew J. (Department: 1791)
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
C162S042000, C162S043000, C162S044000, C162S045000, C162S080000, C210S651000, C008S125000
Reexamination Certificate
active
07854847
ABSTRACT:
Systems and methods for purifying wood pulp by caustic-borate extraction. The systems and method include a method for recovering both the caustic and borate compounds from the resultant hemicaustic effluent, so that they may be recycled and re-used. Efficient recovery of these components is enabled by a nanofiltration system that has one or more alkali-resistant nanofiltration membranes.
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Calandra Anthony J
Daniels Matthew J.
Hunton & Willimas LLP
Rayonier TRS Holdings Inc.
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