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US 4,851,603 AGranted
Preparation of cyclobutarenes via the steam pyrolysis of aromatic derivatives
AssigneeThe Dow Chemical Company
InventorsGeorge J. Quarderer, Fred C. Stone, Mark J. Beitz, Patrick M. O'Donnell
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Abstract
Cyclobutarenes are prepared by pyrolyzing a suitable benzene, naphthalene, or pyridine derivative in the presence of an amount steam effective to substantially reduce the partial pressure of the pyrolyzing compound.
Claims19
An improved process of preparing a cyclobutarene by pyrolyzing a benzene or a naphthalene substituted with any of halomethyl, hydroxymethyl, acetoxymethyl, or trifluoroacetoxymethyl and either methyl or substituted methyl ortho thereto having at least one hydrogen on the alpha carbon;
- wherein the improvement comprises conducting the pyrolysis in the presence of an amount of steam effective to substantially reduce the partial pressure of the pyrolyzing compound.
Dependencies are inferred from the claim text.