Process for the production of phenolic-rich pyrolysis oils for use in making phenol-formaldehyde resole resins
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United States of America Patent
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Nov 7, 2000
Grant Date -
N/A
app pub date -
Feb 5, 1999
filing date -
Jan 29, 1999
priority date (Note) -
Expired
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Abstract
A phenolic-rich pyrolysis oil is produced by pyrolysing lignocellulosic material at a temperature of no more than about 550.degree. C under an absolute pressure of no more than about 50 kPa to produce pyrolysis vapors, and condensing the pyrolysis vapors to obtain a condensate consisting of a phenolic-rich pyrolysis oil having a dew point of about 65 to about 75.degree. C. under an absolute pressure of about 15 to about 20 kPa. Such a phenolic-rich pyrolysis can be directly used in making phenol-formaldehyde resol resins.
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