Hydroxide catalysts for lignin depolymerization
US-2016052949-A1 · Feb 25, 2016 · US
Hydroxide catalysts for lignin depolymerization
US9631146B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9631146-B2 |
| Application number | US-201314047905-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 7, 2013 |
| Priority date | Oct 5, 2012 |
| Publication date | Apr 25, 2017 |
| Grant date | Apr 25, 2017 |
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Abstract
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Solid base catalysts and their use for the base-catalyzed depolymerization (BCD) of lignin to compounds such as aromatics are presented herein. Exemplary catalysts include layered double hydroxides (LDHs) as recyclable, heterogeneous catalysts for BCD of lignin.
First claim
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We claim: 1. A method for degrading lignin, comprising: contacting a stream consisting essentially of lignin with a layered double hydroxide (LDH) catalyst in the presence of a liquid solvent to produce a lignin degradation product; and isolating the lignin degradation product, wherein: the LDH catalyst comprises hydrotalcite (HTC) and nickel (Ni), an amount of the Ni combined with the HTC is between 5 wt % Ni/HTC and 15 wt % Ni/HTC, and the lignin degradation product comprises at least one of an aromatic or an alkane. 2. The method of claim 1 , wherein the liquid solvent comprises at least one of an aqueous solvent or an organic solvent. 3. The method of claim 2 , wherein the liquid solvent is methyl isobutyl ketone. 4. The method of claim 2 , wherein the liquid solvent is ethanol. 5. The method of claim 2 , wherein the liquid solvent is water. 6. The method of claim 1 , wherein the contacting is carried out at a temperature between 200° C. and 400° C. 7. The method of claim 1 , wherein the contacting is carried out at a temperature of at least 200° C. 8. The method of claim 7 , wherein the contacting is carried out for less than one hour. 9. The method of claim 1 , wherein the contacting is carried out for at least 15 minutes. 10. The method of claim 1 , further comprising removing the LDH catalyst from the liquid solvent by filtration. 11. The method of claim 1 , wherein the nickel is in a form of a water-soluble nickel salt. 12. The method of claim 11 , wherein the water-soluble nickel salt is nickel nitrate.
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Classifications
Precipitation · CPC title
Nickel · CPC title
of vegetal origin · CPC title
Mixed salts · CPC title
Characterised by the catalyst used · CPC title
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- What does patent US9631146B2 cover?
- Solid base catalysts and their use for the base-catalyzed depolymerization (BCD) of lignin to compounds such as aromatics are presented herein. Exemplary catalysts include layered double hydroxides (LDHs) as recyclable, heterogeneous catalysts for BCD of lignin.
- Who is the assignee on this patent?
- Alliance Sustainable Energy
- What technology area does this patent fall under?
- Primary CPC classification B01J27/236. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 25 2017 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).