Slow Release of Organoboronic Acids in Cross-Coupling Reactions
US-2016376260-A1 · Dec 29, 2016 · US
Production of furans
US10100025B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10100025-B2 |
| Application number | US-201515526022-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 20, 2015 |
| Priority date | Nov 20, 2014 |
| Publication date | Oct 16, 2018 |
| Grant date | Oct 16, 2018 |
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- Title
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Abstract
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The invention relates to obtaining furans from biomass. In particular, the invention relates to obtaining furans from polyols, such as tetrahydroxybutane. In accordance with the invention tetrahydroxybutane is converted to furan in the presence of a catalyst. The tetrahydroxybutane may be dissolved in a solvent such as water.
First claim
Opening claim text (preview).
The invention claimed is: 1. Method for obtaining furan comprising providing tetrahydroxybutane and converting said tetrahydroxybutane to furan in the presence of a catalyst, wherein the tetrahydroxybutane is heated in the presence of the catalyst to a temperature of at least 130° C., wherein said catalyst is not a heavy metal catalyst. 2. Method according to claim 1 , wherein the tetrahydroxybutane is dissolved in water. 3. Method according to claim 1 , wherein the tetrahydroxybutane is heated in the presence of the catalyst to a temperature of at least 150° C. 4. Method according to claim 1 , wherein the tetrahydroxybutane is heated in the presence of the catalyst for 1 to 60 minutes. 5. Method according to claim 1 , wherein the catalyst is an acid, a base, or an anhydride. 6. Method according to claim 1 , wherein the catalyst is selected from the group consisting of sulfuric acid, phosphoric acid, hydrochloric acid, hydrobromic acid, hydroiodic acid, acetic acid, formic acid, propylphosphonic anhydride, and combinations thereof. 7. Method according to claim 1 , wherein the tetrahydroxybutane concentration is 1 to 1450 g/L. 8. Method according to claim 1 , wherein the tetrahydroxybutane is heated by microwave irradiation. 9. Method according to claim 1 , wherein the tetrahydroxybutane is converted to furan at a pressure of 0 to 200 bar. 10. Method according to claim 1 , wherein furan is selectively evaporated from the reaction mixture. 11. Method according to claim 1 , wherein the tetrahydroxybutane is converted to furan in a conversion of at least 5 mol %. 12. Method according to claim 1 , wherein the tetrahydroxybutane is heated in the presence of the catalyst to a temperature between 150 and 300° C. 13. Method according to claim 1 , wherein the tetrahydroxybutane is heated in the presence of the catalyst to a temperature between 150 and 250° C. 14. Method according to claim 1 , wherein the tetrahydroxybutane is heated in the presence of the catalyst to a temperature between 175 and 225° C. 15. Method according to claim 1 , wherein the tetrahydroxybutane is heated in the presence of the catalyst to a temperature of about 220° C. 16. Method according to claim 1 , wherein the tetrahydroxybutane is heated in the presence of the catalyst for 10 and 20 minutes. 17. Method according to claim 1 , wherein the tetrahydroxybutane is heated in the presence of the catalyst for about 16 minutes. 18. Method according to claim 5 , wherein the acid is a Brønsted acid. 19. Method according to claim 18 , wherein the Brønsted acid has a pK a of less than 4. 20. Method according to claim 18 , wherein the Brønsted acid is immobilized on a solid support. 21. Method according to claim 1 , wherein the tetrahydroxybutane concentration is about 10 g/L. 22. Method according to claim 1 , wherein the tetrahydroxybutane is converted to furan at a pressure of about 20 bar. 23. Method according to claim 1 , wherein the tetrahydroxybutane is converted to furan in a conversion of at least 30 mol %.
Assignees
Inventors
Classifications
- C07D307/36Primary
with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to ring carbon atoms · CPC title
Preparation of tetrahydrofuran · CPC title
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Frequently asked questions
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- What does patent US10100025B2 cover?
- The invention relates to obtaining furans from biomass. In particular, the invention relates to obtaining furans from polyols, such as tetrahydroxybutane. In accordance with the invention tetrahydroxybutane is converted to furan in the presence of a catalyst. The tetrahydroxybutane may be dissolved in a solvent such as water.
- Who is the assignee on this patent?
- TNO, Nederlandse Organisatie Voor Toegepast Natuurewetenschappelijk Onderzoek Tno
- What technology area does this patent fall under?
- Primary CPC classification C07D307/36. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Oct 16 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).