Patents Represented by Attorney Hunton & Willimas LLP

Find this attorney in the Justia Lawyer Directory

  • Process of purifying wood pulp with caustic-borate solution and recovering the purifying chemical
    Patent number: 7854847
    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.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: December 21, 2010
    Assignee: Rayonier TRS Holdings Inc.
    Inventor: Jian Li