| 摘要 |
<p>A cooling and crystallisation surface which has become unacceptably fouled by crystallising a 1:1 adduct of phenol and bisphenol-A is cleaned by dissolving the adduct adhering to the surface with phenol containing 5-40 wt.% water. Also claimed is a continuous bisphenol production process comprising (a) condensing a ketone with a molar excess of a phenol to produce a 1:1 adduct, (b) separating the adduct from the reaction product by crystallisation and (c) maintaining Delta-T (the temperature difference between the process solution and the cooling medium) of the crystalliser at =4[deg]C by dissolving the adduct with the phenol solution.</p> |
