Adsorption process
AssigneeRohm and Haas Company
InventorElio Fiorentino
Life of this patent
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Abstract
In a process for reacting two or more reactants, such as phenol and formaldehyde in the manufacture of phenol/formaldehyde resins, the reaction by-products are treated with an adsorbant resin to remove excess reactant therefrom and the reactant so adsorbed is removed from the adsorbent by elution with the other reactant, the eluate being recycled to the reaction.
Claims5
A process for recovery and reuse of an excess reactant from a reaction mixture discharged from a reaction vessel which comprises passing the reaction mixture containing the excess reactant through a bed of adsorbent resin capable of preferentially adsorbing the excess reactant wherein the excess reactant is adsorbed, thereafter eluting the excess reactant from the adsorbent bed with an eluant which will not react with the excess reactant in the bed under the conditions of elution, which eluant is itself a reactant, other than the excess reactant, used to form the reaction mixture, and finally, recycling the eluate to the reaction vessel.
Dependencies are inferred from the claim text.