Process for preparing 4,6-dinitroresorcinol
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United States of America Patent
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May 17, 1988
Grant Date -
N/A
app pub date -
Jan 7, 1987
filing date -
Jan 7, 1987
priority date (Note) -
Expired
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Abstract
A method of nitrating resorcinol which is selective for the production of the 4,6-dinitro resorcinal isomer. A resorcinol-based starting material is admixed with a nitrating solution from which substantially all nitrogen dioxide and nitrous has been removed. The nitrating solution contains white fuming nitric acid, a nitrosonium ion control agent such as urea, and, optionally, concentrated sulfuric acid. The 4,6-dinitroresorcinal isomer is provided in yields of about 65-85% with minimal production of undesirable side products.
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