Four stage alkaline peroxide mechanical pulpings

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8048263
APP PUB NO 20100186910A1
SERIAL NO

12661909

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A process for applying chemicals, such as an alkaline peroxide pretreatment (1) to lignocellulosic material before chemical refining and at the primary refiner (3). The preferred embodiment comprises (i) preconditioning at temperatures below 95.degree. C., especially below 80.degree. C., (ii) limiting the time and/or temperature in the refiner, (iii) reaction quench to maintain temperatures below 80.degree. C., and (iv) subsequent high consistency bleaching (4).

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Patent Owner(s)

Patent OwnerAddress
ANDRITZ INCONE NAMIC PLACE GLENS FALLS NY 12801

International Classification(s)

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  • 2010 Application Filing Year
  • D21C Class
  • 111 Applications Filed
  • 78 Patents Issued To-Date
  • 70.28 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2010201120122013201420152016201720180255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Herkel, Martin Vienna, AT 2 33
Pschorn, Thomas Lennoxville, CA 18 290
Xu, Eric Chao Miamisburg, US 3 54

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Patent Citation Ranking

  • 10 Citation Count
  • D21C Class
  • 12.04 % this patent is cited more than
  • 14 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges1383101101 - 1011 - 2021 - 3031 - 40051015202530354045505560657075808590

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