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US 4,542,232 AGranted
Process for preparing hydroxyethyl p-(.beta. hydroxyethoxy)benzoate
AssigneeThe Dow Chemical Company
InventorGuy R. Collins
Life of this patent
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Abstract
Excess ethylene carbonate is reacted with p-hydroxybenzoic acid in the presence of a catalytic amount of potassium iodide, potassium bromide, potassium fluoride, cesium iodide or cesium fluoride to make hydroxyethyl p-(hydroxyethoxy)benzoate.
Claims5
A process for preparing hydroxy ethyl p-(.beta.hydroxyethoxy) benzoate comprising the steps of:
- (a) contacting in the liquid phase ethylene carbonate and p-hydroxybenzoic acid in a mole ratio of at least about 2.5:1 at a temperature in the range from about 150.degree. to about 180.degree. C. in the presence of a catalytic amount of KI, CsI, KBr, KF or CsF;
- and
- (b) recovering hydroxy ethyl p-(.beta.hydroxyethoxy) benzoate from the liquid reaction medium.
Dependencies are inferred from the claim text.