EP0069016A1
US4460799A Current Assignee    Saint Gobain Isover SA France Worldwide applications
1981 FR 1982 US CA ES DK NO DE AT EP JP



Example 1
One mole or 94 g of phenol at a temperature of 85° C. is introduced into a 250 ml glass reactor which is equipped with an agitator, a thermometer, a jacket in which 85° C. water circulates, a sampling cock and a CaCl2 guard. One mole, or 30 g of formaldehyde, in the form of paraformaldehyde, is added.
After a period of about 30 minutes, during which the paraformaldehyde is partially depolymerized, 0.0123 mole or 3.77 g of anhydrous aluminum phenate powder is added. The anhydrous aluminum phenate powder has previously been prepared by, for example, the direct addition of aluminum turnings to boiling phenol or by the reaction of aluminum isopropylate on phenol.
The condensation reaction is permitted to continue for about 2 hours 50 minutes. Progress of the reaction is monitored by gas or liquid phase chromatography.
The resulting reaction mixture has the following composition:
49.8 g phenol
53.3 g saligenol
0 g para-hydroxybenzyl alcohol
The saligenol yield is 91.5% in relation to the phenol consumed.