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US 9,187,698 B2Granted
Falling film reactor for light tar oxidation
AssigneesGrafTech International Holdings Inc., JPMorgan Chase Bank N.A., as collateral agent
InventorsChong Chen, Philip Dennis Coleman
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Abstract
A method of processing light fraction tar includes pre-heating the light fraction tar before directing it through a reactor. The reactor has a top and a bottom and a surface spanning between said top and said bottom. A film of the light fraction tar flows down the surface under the force of gravity and with heated gas blowing thereon. The portion of the film that reaches the bottom of the reactor has improved properties making it more widely useful for carbon products.
Claims10
A method of upgrading pitch comprising:
- charging a molten metal bath with a feed-stock;
- capturing high-softening point pitch output from said molten metal bath;
- directing by-product light fraction tar from said molten metal bath through a reactor having a top and a bottom and a surface spanning between said top and said bottom upon which a film of said light fraction tar flows down under the force of gravity;
- heating said surface;
- blowing a heated gas over said film;
- and
- adding back into said feed-stock the portion of said film that reaches the bottom of said reactor.
4 more elements
Dependencies are inferred from the claim text.