Method for preparation of alkyl glycolates

Details Method for preparation of alkyl glycolates Method for preparation of alkyl glycolates

C - Chemistry, Metallurgy

07

C

260/488.6

C07C 69/708 (2006.01) C07C 69/675 (2006.01)

Patent

CA 1321208

43-21(6601)A METHOD FOR PREPARATION OF ALKYL GLYCOLATES Abstract of the Disclosure A method of carbonylation of formaldehyde is disclosed. In the method, an aqueous formaldehyde concentrate comprising between about 60% by weight and about 85% by weight formaldehyde, carbon monoxide and sulfuric acid are brought together in the absence of an effective amount of added Group IB cocatalyst in a reaction zone under a carbon monoxide partial pressure in the reaction zone of not greater than about 1.72 X 107 N/M2. A carbonyla- tion reaction is thereby effected in which a carbonylation product is produced comprising at least about 2% by weight sulfuric acid and a mixture of compounds of the formula: HO(CH2COO)nH wherein n is a positive integer of at least 1. Also disclosed is a method for preparation of an alkyl glycolate by esterification of the carbonylation reaction mixture.

589061

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