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Title:
BIODEGRADABLE SHEET, AND BIODEGRADABLE CONTAINER
Document Type and Number:
Japanese Patent JP2007002383
Kind Code:
A
Abstract:

To produce pulp from woody biomass in high production efficiency and in high fiber recovery.

The pulp is produced by steaming (for example, treating with pressurized water at 130°C or higher) woody biomass in the presence of ammonia or an ammonia generator. In this process, the ammonia generator is e.g. an amine group-bearing compound, an amide group-bearing compound such as urea, a carbonate-based ammonium compound such as ammonium carbonate or ammonium bicarbonate, an organic acid ammonium salt. The pH of the system after completing the steaming step is normally about 4 to 9. After the steaming step, a treatment liquid separated and retrieved from the pulp may be optionally reused as the above-mentioned ammonia or ammonia generator.


Inventors:
MATSUNAGA KOUTETSU
Application Number:
JP2005241310A
Publication Date:
January 11, 2007
Filing Date:
August 23, 2005
Export Citation:
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Assignee:
KRI INC
International Classes:
D21C3/02; D21J3/10
Attorney, Agent or Firm:
Kyuichi Ueki
Tadashi Sugakawa
Osamu Futakuchi
Hiroaki Ito