Preparation of polyglycidyl ethers of polyhydric phenols

Details Preparation of polyglycidyl ethers of polyhydric phenols Preparation of polyglycidyl ethers of polyhydric phenols

C - Chemistry, Metallurgy

07

D

260/370.8

C07D 303/26 (2006.01) C07D 303/24 (2006.01)

Patent

CA 1118433

ABSTRACT Process for the preparation of a polyglycidyl ether of a polyhydric phenol, comprising the steps of reacting the polyhydric phenol with from 2.5 to 10 moles an epihalohydrin per hydroxy equivalent in the presence of a condensation catalyst, water, and an oxygen-containing volatile organic solvent, and de- hydrohalogenating with aqueous alkali metal hydroxide, with separation of aqueous phase and organic phase in one or more stages and recovery of the polyglycidyl ether from the last organic phase, wherein at least part of at least one separated aqueous is recycled to an earlier stage of the process.

304960

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