| 摘要 |
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.
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