Process for preparing glycolic acid and its polymers
First Claim
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1. A process for preparing glycolic acid and its polymers starting from formaldehyde, wherein the formaldehyde is reacted with carbon monoxide in concentrated H2 SO4 as reaction medium, in the presence of a catalyst consisting essentially of Cu (I) or Ag oxides and acid salts thereof, and at a temperature ranging from 0°
- to 90°
C and at a pressure between 0.1 and 30 atmospheres.
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Abstract
A process is disclosed for preparing glycolic acid and its polymers starting from formaldehyde, wherein the formaldehyde is reacted with carbon monoxide in concentrated H2 SO4 as reaction medium, in the presence of a catalyst based on a compound of Cu (I) or of Ag, and at a temperature ranging from 0° to 90° C and at a pressure between 0.1 and 30 atmospheres.
20 Citations
6 Claims
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1. A process for preparing glycolic acid and its polymers starting from formaldehyde, wherein the formaldehyde is reacted with carbon monoxide in concentrated H2 SO4 as reaction medium, in the presence of a catalyst consisting essentially of Cu (I) or Ag oxides and acid salts thereof, and at a temperature ranging from 0°
- to 90°
C and at a pressure between 0.1 and 30 atmospheres. - View Dependent Claims (2, 3, 4, 5, 6)
- to 90°
Specification
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Current AssigneeMontedison S.p.A. (Government of France)
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Original AssigneeMontedison S.p.A. (Government of France)
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InventorsCassar, Luigi, Caprara, Giuseppe, Rivolta, Luigi, Scardigno, Salvatore
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Primary Examiner(s)Killos, Paul J.
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Application NumberUS05/600,044Time in Patent Office798 DaysField of Search260/535 RUS Class Current562/518CPC Class CodesC07C 51/12 on an oxygen-containing gro...C07C 59/06 Glycolic acidC08G 63/06 derived from hydroxycarboxy...
