Process for making mesophase pitch
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United States of America Patent
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-
Mar 12, 1991
Grant Date -
N/A
app pub date -
Jan 30, 1986
filing date -
Jan 30, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved process for producing an anisotropic pitch product suitable for carbon fiber manufacture. A carbonaceous feedstock is heated at elevated temperature while passing a reactive sparging gas through the feedstock. The sparging gas is an oxidative gas such as a gaseous mixture containing a major proportion of inert gas and from about 0.1 to 2% by volume of oxygen. The process produces an anisotropic pitch having from 50 to 100% by volume mesophase which is suitable for producing good quality carbon fibers.
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