Process for the production of furan and its derivatives
The present invention provides a process for the treatment of a liquid first furan stream comprising furan and carbon monoxide, said process comprising the steps of: i) contacting said first furan stream with a CO-lean first gaseous stream; and ii) stripping at least a portion of the carbon monoxide in the first furan stream into the first gaseous stream to produce a second furan stream comprising less carbon monoxide than the first furan stream and a CO-enriched second gaseous stream.
1. A process for the treatment of a liquid first furan stream comprising furan and carbon monoxide, said process comprising the steps of:
i) contacting said first furan stream with a CO-lean first gaseous stream; and
ii) stripping at least a portion of the carbon monoxide in the first furan stream into the first gaseous stream to produce a liquid second furan stream comprising less carbon monoxide than the first furan stream and a CO-enriched second gaseous stream.
2. A process according to claim 1 , wherein the CO-lean first gaseous stream comprises one or more gases from the group consisting of hydrogen, nitrogen, carbon dioxide, steam and methane.
3. A process according to claim 2 , wherein the CO-lean first gaseous stream comprises hydrogen.
4. A process according to claim 1 , wherein the CO-lean first gaseous stream comprises no more than 10 vol % CO.
5. A process according to claim 1 , wherein the process further comprises the steps of:
i) contacting a second furan stream with hydrogen in the presence of a hydrogenation catalyst to produce a hydrogenation reaction product stream comprising THF, n-butyl alcohol (NBA) and/or 1,4-BDO and hydrogen;
ii) separating the hydrogenation reaction product stream into a stream comprising THF, NBA and/or 1,4-BDO and a third gaseous stream comprising hydrogen; and
iii) using at least a portion of said third gaseous stream comprising hydrogen as the first CO-lean gaseous stream.
6. A process according to claim 1 , wherein the hydrogenation catalyst comprises one or more metals selected from groups 8 to 11 of the periodic table.
7. A process according to claim 1 , wherein the liquid first furan stream is produced in a process comprising the steps of contacting furfural with a decarbonylation catalyst to produce a decarbonylation reaction product stream; and further processing the decarbonylation reaction product stream in order to provide the liquid first furan stream.
8. A process according to claim 7 , wherein the furfural is contacted with the decarbonylation catalyst in the presence of hydrogen.
9. A process according to claim 8 , wherein the CO-enriched second gas stream is subsequently used to provide the source of said hydrogen.
10. A process according to claim 7 , wherein, the decarbonylation reaction product stream is subjected to compression and/or cooling in order to provide the liquid first furan stream.
11. A process according to claim 7 , wherein, optionally after cooling and/or compression, the decarbonylation reaction product stream is contacted with a solvent stream and at least a portion of the furan present is absorbed into the solvent stream to provide a furan-containing solvent stream.
12. A process according to claim 11 , wherein the furan-containing solvent stream is used as the first furan stream.
13. A process according to claim 11 , wherein the first furan stream is produced from the furan-containing solvent stream by distillation.