Process for increasing pitch yield from coal tar
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United States of America Patent
Stats
-
Nov 30, 1993
Grant Date -
N/A
app pub date -
Feb 7, 1992
filing date -
Feb 7, 1992
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Described is a preferred process for obtaining an increased pitch yield from the distillation of crude coal tar material. The process includes treating a crude coal tar material by reaction with formaldehyde, followed by distillation of the coal tar to afford a yield of coal tar pitch which is significantly increased over that obtained without the formaldehyde treatment.
First Claim
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