Production of bis (hydroxyaryl) substituted compounds
First Claim
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10. IN A PROCESS FOR THE PRODUCTION OF BIS(HYDROXYARYL) ALKANES WHEREIN A PHENOL HAVING AT LEAST ONE REPLACEABLE HYDROGEN ATOM ATTACHED DIRECTLY TO A CARBON ATOM IN THE PHENOLIC RING IS REACTED WITH AN ALIPHATIC KETONE IN THE PRESENCE OF AN ACID CATALYST CONSISTING ESSENTIALLY OF A STRONG MINERAL ACID AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 20 TO ABOUT 110* C., THE STEPS WHICH COMPRISE CHARGING SAID PHENOL AND SAID ALIPHATIC KETONE IN CONTINUOUS STREAM IN A MOLE RATIO OF PHENOL TO SAID ALIPHATIC KETONE OF AT LEAST 5:
- 1 AND IN THE PRESENCE OF SAID ACID CATALYST THROUGH A PLURALITY OF REACTION ZONES ARRANGED IN SERIES FLOW AND MAINTAINED AT A TEMPERATURE IN SAID TEMPERATURE RANGE, INTRODUCING IN CONSTANT STREAM A MIXTURE COMPRISING SAID ACID CATALYST AND ALL OF SAID PHENOL BUT ONLY FROM ABOUT 10 TO ABOUT 90% BY WEIGHT OF SAID ALIPHATIC KETONE INTO THE FIRST OF SAID PLURALITY OF REACTION ZONES, INTRODUCING THE REMAINDER OF SAID ALIPHATIC KETONE IN CONTINUOUS STREAM INTO AT LEAST ONE REACTION ZONE SUBSEQUENT TO SAID FIRST REACTION ZONE IN SAID PLURALITY OF REACTION ZONES, AND MAINTAINING A TEMPERATURE GRADIENT INCREASING PROGRESSIVELY IN THE DIRECTION OF FLOW OF THE REACTANTS THROUGH SAID PLURALITY OF ZONES.
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10 Claims
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10. IN A PROCESS FOR THE PRODUCTION OF BIS(HYDROXYARYL) ALKANES WHEREIN A PHENOL HAVING AT LEAST ONE REPLACEABLE HYDROGEN ATOM ATTACHED DIRECTLY TO A CARBON ATOM IN THE PHENOLIC RING IS REACTED WITH AN ALIPHATIC KETONE IN THE PRESENCE OF AN ACID CATALYST CONSISTING ESSENTIALLY OF A STRONG MINERAL ACID AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 20 TO ABOUT 110* C., THE STEPS WHICH COMPRISE CHARGING SAID PHENOL AND SAID ALIPHATIC KETONE IN CONTINUOUS STREAM IN A MOLE RATIO OF PHENOL TO SAID ALIPHATIC KETONE OF AT LEAST 5:
- 1 AND IN THE PRESENCE OF SAID ACID CATALYST THROUGH A PLURALITY OF REACTION ZONES ARRANGED IN SERIES FLOW AND MAINTAINED AT A TEMPERATURE IN SAID TEMPERATURE RANGE, INTRODUCING IN CONSTANT STREAM A MIXTURE COMPRISING SAID ACID CATALYST AND ALL OF SAID PHENOL BUT ONLY FROM ABOUT 10 TO ABOUT 90% BY WEIGHT OF SAID ALIPHATIC KETONE INTO THE FIRST OF SAID PLURALITY OF REACTION ZONES, INTRODUCING THE REMAINDER OF SAID ALIPHATIC KETONE IN CONTINUOUS STREAM INTO AT LEAST ONE REACTION ZONE SUBSEQUENT TO SAID FIRST REACTION ZONE IN SAID PLURALITY OF REACTION ZONES, AND MAINTAINING A TEMPERATURE GRADIENT INCREASING PROGRESSIVELY IN THE DIRECTION OF FLOW OF THE REACTANTS THROUGH SAID PLURALITY OF ZONES.
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Current AssigneeGeorge T. Williamson
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Original AssigneeGeorge T. Williamson
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InventorsWilliamson, George T.
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Application NumberUS03/442,770Time in Patent Office897 DaysField of SearchUS Class Current568/728CPC Class CodesC07C 37/20 using aldehydes or ketonesC07C 39/16 Bis-(hydroxyphenyl) alkanes...
