Process for photo-oxidative stability improvements

Details Process for photo-oxidative stability improvements Process for photo-oxidative stability improvements

2008-05-13

2008-05-13

McAvoy, Ellen (Department: 1797)

Chemistry of hydrocarbon compounds

Product blend, e.g., composition, etc., or blending process...

With nonhydrocarbon additive

C585S003000, C585S004000, C585S005000, C585S025000, C585S026000, C585S027000

Reexamination Certificate

active

10924637

ABSTRACT:
A process for improving the stability to photo-oxidation of a polycyclic aromatic compound having at least two polymorphic forms comprises treating a first polymorph with one or more solvents to obtain the more stable second polymorph and then separating the second polymorph from the solvent.

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