Method for producing superior quality paving asphalt and product prepared therefrom
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United States of America Patent
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Feb 8, 1994
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app pub date -
Apr 15, 1992
filing date -
May 30, 1990
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Abstract
A process for preparing a paving asphalt cement comprising two steps. In the first step, a high quality paving asphalt precursor, a low quality paving asphalt precursor, a non-paving asphalt precursor or a mixture thereof are catalytically oxidized to form a paving asphalt cement. In the second step, the catalytically oxidized paving asphalt cement is mixed with one or more of a high quality paving asphalt precursor, a low quality paving asphalt precursor, a non-paving asphalt precursor or a mixture thereof.
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