Process

A process for the production of glycolic acid (hydroxyacetic acid) from formaldehyde comprising reacting formaldehyde with carbon monoxide and water in the presence of a silica catalyst, wherein from about 200 to about 5000 ppm, preferably 300-500 ppm of an alkyl silyl sulfonic acid, preferably a tr...

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Bibliographic Details
Main Authors Adam Armour Snaith, Simon Wayne Jackson, David John Watson, Michael William Marshall Tuck
Format Patent
LanguageEnglish
Published 05.04.2017
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:A process for the production of glycolic acid (hydroxyacetic acid) from formaldehyde comprising reacting formaldehyde with carbon monoxide and water in the presence of a silica catalyst, wherein from about 200 to about 5000 ppm, preferably 300-500 ppm of an alkyl silyl sulfonic acid, preferably a trihydroxysilylalkyl sulfonic acid is supplied to the reaction. The preferred acids are trihydroxysilylpropyl sulfonic acid and trihydroxysilylethyl sulfonic acid. The silica catalyst may be porous or non-porous and may be functionalised e.g. by the presence of acid groups tethered to the silica support. The alkyl silyl sulfonic acid may be supplied in a recycle product stream. The reaction may be carried out using a solvent including water, propionic acid and 2,3,4,5-tetrahydrothiophene-1,1-dioxide. The reaction is preferably conducted at 100-250 ºC and 10-200 bara (0.1-20 MPa).
Bibliography:Application Number: GB20160004956