摘要:
An integrated process for producing an ester of 2,5-furandicarboxylic acid from a six carbon sugar-containing feed, comprising: e) dehydrating a feed comprising a six-carbon sugar unit, in the presence of a bromine source and of a solvent, at an elevated temperature and for a time sufficient to generate an oxidation feed comprised of at least one of 5-hydroxymethylfurfural and/or a derivative or derivatives of 5-hydroxymethylfurfural in the solvent, together with at least one bromine containing species; f) contacting the oxidation feed from step (a) with a homogenous metal catalyst and with an oxygen source at an elevated temperature for a time sufficient to produce an oxidation product mixture comprising 2,5-furandicarboxylic acid (FDCA), the solvent, and a residual catalyst; g) purifying and separating the mixture obtained in step (b) to obtain FDCA and the solvent; h) recycling at least a portion of the solvent obtained in step (c) to step (a); and e) esterifying 2,5-furandicarboxylic acid with a C 1 -C 12 aliphatic alcohol or a C 1 -C 12 aliphatic diol, under conditions effective for carrying out the esterification and optionally in the presence of a suitable esterification catalyst.
摘要:
An integrated process for producing an ester of 2,5-furandicarboxylic acid from a six carbon sugar-containing feed, comprising: e) dehydrating a feed comprising a six-carbon sugar unit, in the presence of a bromine source and of a solvent, at an elevated temperature and for a time sufficient to generate an oxidation feed comprised of at least one of 5-hydroxymethylfurfural and/or a derivative or derivatives of 5-hydroxymethylfurfural in the solvent, together with at least one bromine containing species; f) contacting the oxidation feed from step (a) with a homogenous metal catalyst and with an oxygen source at an elevated temperature for a time sufficient to produce an oxidation product mixture comprising 2,5-furandicarboxylic acid (FDCA), the solvent, and a residual catalyst; g) purifying and separating the mixture obtained in step (b) to obtain FDCA and the solvent; h) recycling at least a portion of the solvent obtained in step (c) to step (a); and e) esterifying 2,5-furandicarboxylic acid with a C 1 -C 12 aliphatic alcohol or a C 1 -C 12 aliphatic diol, under conditions effective for carrying out the esterification and optionally in the presence of a suitable esterification catalyst.
摘要:
An integrated process for producing 2,5-furandicarboxylic acid and/or a derivative thereof from a six carbon sugar-containing feed, comprising: a) dehydrating a feed comprising a six-carbon sugar unit, in the presence of a bromine source and of a solvent, at an elevated temperature and for a time sufficient to generate an oxidation feed comprised of at least one of 5-hydroxymethylfurfural and/or a derivative or derivatives of 5-hydroxymethylfurfural in the solvent, together with at least one bromine containing species; b) reducing the water content of the oxidation feed produced in step (a); c) contacting the oxidation feed from step (b) with a metal catalyst and with an oxygen source at an elevated temperature for a time sufficient to produce an oxidation product mixture comprising 2,5-furandicarboxylic acid (FDCA) and/or a derivative thereof, the solvent, and a residual catalyst, wherein the metal catalyst comprises either or both of Co and Mn; d) purifying and separating the mixture obtained in step (c) to obtain FDCA and/or a derivative thereof and the solvent; and e) recycling at least a portion of the solvent obtained in step (d) to step (a).
摘要:
An integrated process for producing 2,5-furandicarboxylic acid and/or a derivative thereof from a six carbon sugar-containing feed, comprising: a) dehydrating a feed comprising a six-carbon sugar unit, in the presence of a bromine source and of a solvent, at an elevated temperature and for a time sufficient to generate an oxidation feed comprised of at least one of 5-hydroxymethylfurfural and/or a derivative or derivatives of 5-hydroxymethylfurfural in the solvent, together with at least one bromine containing species; b) reducing the water content of the oxidation feed produced in step (a); c) contacting the oxidation feed from step (b) with a metal catalyst and with an oxygen source at an elevated temperature for a time sufficient to produce an oxidation product mixture comprising 2,5-furandicarboxylic acid (FDCA) and/or a derivative thereof, the solvent, and a residual catalyst, wherein the metal catalyst comprises either or both of Co and Mn; d) purifying and separating the mixture obtained in step (c) to obtain FDCA and/or a derivative thereof and the solvent; and e) recycling at least a portion of the solvent obtained in step (d) to step (a).
摘要:
The present invention relates to a process for making the esters of 2,5-furandicarboxylic acid, and particularly the dimethyl, diethyl or dipropyl esters of FDCA for use as monomers in the production of polyesters and other types of polymers with biobased content, comprising: reacting an aqueous feed comprising glucaric acid with a high boiling first alcohol in the presence of an acid catalyst and with removing water during the reaction, to form a first product mixture comprising a first ester of FDCA and the high boiling first alcohol; removing unreacted high boiling first alcohol from the first product mixture; combining the first ester of FDCA and the high boiling first alcohol with a lower boiling second alcohol selected from the group consisting of methanol, ethanol, isopropanol and n-propanol; transesterifying the first ester with the lower boiling second alcohol to form a second product mixture comprising a second ester of FDCA with the lower boiling second alcohol; and recovering the second ester of FDCA with the lower boiling second alcohol.