Oxidation process to produce a purified carboxylic acid product via solvent displacement and post oxidation
US-9029580-B2 · May 12, 2015 · US
US10442780B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10442780-B2 |
| Application number | US-201916264188-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 31, 2019 |
| Priority date | Jan 13, 2016 |
| Publication date | Oct 15, 2019 |
| Grant date | Oct 15, 2019 |
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The present disclosure provides processes for the production of 2-5-furandicarboxylic acid (FDCA) and intermediates thereof by the chemocatalytic conversion of a furanic oxidation substrate. The present disclosure further provides processes for preparing derivatives of FDCA and FDCA-based polymers. In addition, the present disclosure provides crystalline preparations of FDCA, as well as processes for making the same.
Opening claim text (preview).
We claim: 1. A process for producing a first 2,5-furandicarboxylic acid (FDCA) pathway product from a first furanic oxidation substrate, the process comprising: (a) contacting an oxidation feedstock comprising a first furanic oxidation substrate and a first oxidation solvent with oxygen in the presence of a first heterogeneous oxidation catalyst under conditions sufficient to form a reaction mixture for oxidizing the first furanic oxidation substrate to a first FDCA pathway product, and producing the first FDCA pathway product; wherein the first oxidation solvent is a multi-component solvent comprising water and a water-miscible aprotic organic solvent; wherein no base is added to the reaction mixture during (first) contacting step (a); and wherein the first heterogeneous oxidation catalyst comprises a first solid support and a first noble metal. 2. The process of claim 1 , wherein the first noble metal is selected from the group consisting of platinum, gold, and combinations thereof. 3. The process of claim 1 , wherein the water-miscible aprotic organic solvent is selected from the group consisting of tetrahydrofuran, a glyme, dioxane, a dioxolane, dimethylformamide, dimethylsulfoxide, sulfolane, acetone, N-methyl-2-pyrrolidone (“NMP”), methyl ethyl ketone (“MEK”), and gamma-valerolactone; and, if the water-miscible aprotic organic solvent is a glyme, then the glyme is selected from the group consisting of a monoglyme (1,2-dimethoxyethane), ethyl glyme, diglyme (diethylene glycol dimethyl ether), ethyl diglyme, triglyme, butyl diglyme, tetraglyme, and a polyglyme. 4. The process of claim 3 , wherein the water-miscible aprotic organic solvent is a glyme. 5. The process of claim 4 , wherein the water-miscible aprotic organic solvent is 1,2-dimethoxyethane (“DME”). 6. The process of claim 4 , wherein the water-miscible aprotic organic solvent is diglyme. 7. The process of claim 3 , wherein the water-miscible aprotic organic solvent is dioxane. 8. The process of claim 3 , wherein the water-miscible aprotic organic solvent is NMP. 9. The process of claim 3 , wherein the water-miscible aprotic organic solvent is MEK. 10. The process of claim 1 , wherein the weight percent ratio of the water-miscible aprotic organic solvent:water is in the range of from or any number in between 70:30 to 20:80. 11. The process of claim 10 , wherein the weight percent ratio of the water-miscible aprotic organic solvent:water is in the range of from or any number in between 60:40 to 40:60. 12. The process of claim 1 , wherein the first oxidation feedstock comprises the first furanic oxidation substrate at a concentration of at least 5% by weight. 13. The process of claim 1 , wherein the first heterogeneous oxidation catalyst comprises the first noble metal at a loading in the range of from or any number in between 0.3% to 5% by weight of the first heterogeneous oxidation catalyst. 14. The process of claim 1 , wherein the first solid support comprises a material selected from the group consisting of a metal oxide, a carbonaceous material, a polymer, a metal silicate, a metal carbide, and any combination of two or more thereof. 15. The process of claim 1 , wherein the first solid support comprises a plurality of pores and a specific surface area in the range of from or any number in between 20 m 2 /g to 500 m 2 /g. 16. The process of claim 15 , wherein the first solid support comprises a specific surface area in the range of from or any number in between 25 m 2 /g to 350 m 2 /g. 17. The process of claim 15 , wherein the first solid support comprises a specific surface area in the range of from or any number in between 20 m 2 /g to 50 m 2 /g. 18. The process of claim 17 , wherein the first solid support comprises a specific surface area in the range of from or any number in between 20 m 2 /g to 40 m 2 /g. 19. The process of claim 16 , wherein the first solid support comprises a pore volume wherein at least 50% of the pore volume is from pores having a pore diameter in the range of from or any number in between 5 nm to 100 nm. 20. The process of claim 1 , wherein oxygen is present at a molar ratio of oxygen:the first furanic oxidation substrate in the range of from or any number in between 2:1 to 10:1. 21. The process of claim 1 , wherein (first) contacting step (a) is carried out at a temperature in the range of from or any number in between 50° C. to 200° C. 22. The process of claim 1 , wherein the first FDCA pathway product is produced at a yield of at least 80%. 23. The process of claim 1 , wherein the first FDCA pathway product is FDCA. 24. The process of claim 1 , further comprising a second oxidation step, wherein the second oxidation step comprises: (b) contacting a second oxidation feedstock comprising a second furanic oxidation substrate and a second oxidation solvent with oxygen in the presence of a second heterogeneous oxidation catalyst under conditions sufficient to form a second reaction mixture for oxidizing the second furanic oxidation substrate to produce a second FDCA pathway product, and producing the second FDCA pathway product; wherein the first FDCA pathway product is an FDCA pathway intermediate compound, either alone or together with FDCA; wherein the second furanic oxidation substrate is the first FDCA pathway product; wherein the second reaction mixture is substantially free of added base; and wherein the second heterogeneous oxidation catalyst comprises a second solid support and a second noble metal, that may be the same or different from the first noble metal. 25. The process of claim 24 , wherein the second noble metal is selected from the group consisting of platinum, gold, and a combination thereof. 26. The process of claim 24 , wherein the second solid support comprises a plurality of pores and a specific surface area in the range of from or any number in between 20 m 2 /g to 500 m 2 /g. 27. The process of claim 1 , further comprising: (a°) prior to (first) contacting step (a), contacting a carbohydrate feedstock comprising a sugar and a dehydration solvent with a dehydration catalyst under conditions sufficient to form a dehydration reaction mixture for dehydrating the sugar to produce the first furanic oxidation substrate, wherein the first furanic oxidation substrate is present in a dehydration product solution that comprises the first furanic oxidation substrate and the dehydration solvent. 28. The process of claim 27 , wherein the dehydration catalyst is an acid catalyst. 29. The process of claim 28 , wherein the acid catalyst is an acid selected from the group consisting of HBr, H 2 SO 4 , HNO 3 , HCl, HI, H 3 PO 4 , triflic acid, methansulfonic acid, benzenesulfonic acid, and p-toluene sulfonic acid. 30. The process of claim 29 , wherein when the acid catalyst is not HBr, the dehydration reaction mixture further comprises a bromide salt. 31. The process of claim 27 , wherein the dehydration solvent comprises N-methyl-pyrrolidone (NMP). 32. The process of claim 27 , wherein the sugar is fructose and the first furanic oxidation substrate is HMF. 33. The process of claim 27 , wherein the (pior) contacting step)(a°) is carried out at a temperature of less than 110° C.
with stationary particles, e.g. in fixed beds · CPC title
Recycling of unreacted starting or intermediate materials · CPC title
Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen · CPC title
Feeding means for the reactants · CPC title
Gold · CPC title
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