Processes for preparing c-4 sugars and ketose sugars
OwnerWilliam J. Collins, Josh Terrian +2inventors
InventorsWilliam J. Collins, Josh Terrian, James Brazdil, Kevin Martin
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Abstract
Various processes for preparing C4 aldoses and/or ketones thereof are described. Various processes are described for preparing C4 aldoses and/or ketones thereof from feed compositions comprising glycolaldehyde. Also, various processes for preparing useful downstream products and intermediates, such as erythritol and erythronic acid, from the C4 aldoses and/or ketones thereof are described.
Claims12
A process for preparing erythritol and/or threitol, the process comprising:
- contacting a feed composition comprising glycolaldehyde with a catalyst comprising an imidazolate framework in a reaction zone to condense at least a portion of the glycolaldehyde to erythrose and/or threose;
- and
- hydrogenating at least a portion of the erythrose and/or threose to form the erythritol and/or threitol.
A process for preparing erythronic acid, threonic acid, and/or a salt thereof, the process comprising:
- contacting a feed composition comprising glycolaldehyde with a catalyst comprising an imidazolate framework in a reaction zone to condense at least a portion of the glycolaldehyde to erythrose and/or threose;
- and
- oxidizing at least a portion of the erythrose and/or threose to form the erythronic acid, threonic acid, and/or salt thereof.
A process for preparing a downstream product, the process comprising:
- contacting a feed composition comprising glycolaldehyde with a catalyst comprising an imidazolate framework in a reaction zone to condense at least a portion of the glycolaldehyde to the C4 aldose and/or ketone thereof;
- and
- converting the C4 aldose and/or ketone thereof to a downstream product or a precursor thereof, wherein the downstream product is a compound selected from the group consisting of glyceraldehyde;
- methyl vinyl glycolate;
- 2-hydroxy-4-methoxybutanoate;
- 2-hydroxy-4-methoxybutanoic acid;
- 1,4-butandiol;
- α-hydroxy-γ-butyrolactone, methionine, and analogues thereof.
Dependencies are inferred from the claim text.