Methods for preparing a lignin dispersion and a resin from the lignin dispersion
US-2020157287-A1 · May 21, 2020 · US
Liquid lignin composition comprising lignin, water, alkali and urea
US12221545B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12221545-B2 |
| Application number | US-201816631236-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 2, 2018 |
| Priority date | Jul 18, 2017 |
| Publication date | Feb 11, 2025 |
| Grant date | Feb 11, 2025 |
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- Title
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Abstract
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The present invention relates to a liquid lignin composition, particularly useful in the manufacture of resins for products such as insulation, laminates and engineered wood products such as oriented strand boards (OSB). The liquid lignin composition has a low viscosity even at low water content.
First claim
Opening claim text (preview).
The invention claimed is: 1. A liquid lignin composition comprising: 20-45% wt-% water, 30-40 wt-% lignin, 0.5-11 wt-% of a group 1 alkali metal hydroxide, and 1-20 wt-% urea. 2. A liquid lignin composition according to claim 1 , wherein the amount of urea is 5-15 wt-%. 3. A liquid lignin composition according claim 1 , wherein the lignin is essentially in dissolved form in the composition. 4. A method for preparing the liquid lignin composition as defined in claim 1 , wherein lignin is mixed with water, alkali and urea. 5. A method for preparing a resin, wherein the liquid lignin composition according to claim 1 is reacted with additional components to prepare a resin. 6. A method according to claim 5 , wherein the liquid lignin composition is reacted with phenol to prepare a resin. 7. A method according to claim 5 , wherein the liquid lignin composition is used to prepare a resin that is essentially free from phenol and/or essentially free from formaldehyde. 8. A method according to claim 5 , wherein pre-methylolation of phenol by reacting phenol with formaldehyde is carried out, followed by mixing the product of the pre-methylolation with the liquid lignin composition. 9. A resin obtainable by the method of claim 5 . 10. A method according to 5 , wherein the liquid lignin composition is reacted with phenol and other components to prepare a resin. 11. The liquid lignin composition according to claim 1 , wherein the amount of water is between 25-45 wt-%. 12. The liquid lignin composition according to claim 1 , wherein the amount of water is between 35-45 wt-%. 13. The liquid lignin composition according to claim 1 , wherein the amount of lignin is between 35-40 wt-%. 14. The liquid lignin composition according to claim 1 , wherein the amount of lignin is between 30-35 wt-%.
Assignees
Inventors
Classifications
characterised by the type of binder (compositions of macromolecular compounds C08L) · CPC title
Macromolecular compounds derived from lignin, e.g. tannins, humic acids · CPC title
Low-molecular-weight derivatives of lignin (high-molecular-weight derivatives of lignin {C08H6/00}) · CPC title
Manufacture of substantially flat articles, e.g. boards, from particles or fibres · CPC title
Lignocellulosic material, e.g. wood, straw or bagasse · CPC title
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Frequently asked questions
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- What does patent US12221545B2 cover?
- The present invention relates to a liquid lignin composition, particularly useful in the manufacture of resins for products such as insulation, laminates and engineered wood products such as oriented strand boards (OSB). The liquid lignin composition has a low viscosity even at low water content.
- Who is the assignee on this patent?
- Stora Enso Oyj
- What technology area does this patent fall under?
- Primary CPC classification C08L97/005. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 11 2025 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).