Cellulose-containing compositions and methods of making same

Patent metadata

Field	Value
Publication number	US-11649296-B2
Application number	US-202217880551-A
Country	US
Kind code	B2
Filing date	Aug 3, 2022
Priority date	Sep 26, 2014
Publication date	May 16, 2023
Grant date	May 16, 2023

Abstract

Cellulose-containing compositions and method of making same are disclosed. The compositions comprise a cellulose product comprising a type-I cellulose, a type-II cellulose, amorphous cellulose, or a combination thereof. Further, methods are disclosed for making these compositions and for further hydrolyzing these compositions. Additionally, uses for the cellulose-containing compositions are disclosed.

First claim

What is claimed is:

1. A composition comprising a cellulose product in an amount of from 45% by weight to 100% by weight, based on the total weight of the composition on a dry basis, wherein the cellulose product comprises a type I and a type-II cellulose, and wherein the cellulose product comprises cellulose having a weight-average molecular weight of from 3,000 g/mol to 25,000 g/mol as determined on a sample of the cellulose product that has been prepared for gel-permeation chromatography analysis according to a first condition.

2. The composition of claim 1 , wherein the composition further comprises an alcohol-soluble fraction.

3. The composition of claim 2 , wherein the alcohol-soluble fraction comprises lignin in an amount of from 0% by weight to 30% by weight, based on the total weight of the composition on a dry basis.

4. The composition of claim 1 , wherein the composition further comprises at least one of the group consisting of a monosaccharide and an oligosaccharide, and mixtures thereof.

5. The composition of claim 4 , wherein the monosaccharide is selected from the group consisting of a C5 monosaccharide and a C6 monosaccharide, and mixtures thereof.

6. The composition of claim 5 , wherein the C5 monosaccharide is selected from the group consisting of arabinose, lyxose, ribose, and xylulose, and mixtures thereof.

7. The composition of claim 5 , wherein the C6 monosaccharide is selected from the group consisting of glucose, mannose, galactose, and cello-oligosaccharides, and mixtures thereof.

8. The composition of claim 4 , wherein the oligosaccharide is selected from the group consisting of a C5 oligosaccharide and a C6 oligosaccharide, and mixtures thereof.

9. The composition of claim 1 , wherein the cellulose product has a particle size of from 10 nm to 500 nm.

10. The composition of claim 1 , wherein the cellulose product has a particle size distribution with a D10 of from 0.4 μm to 35 μm.

11. The composition of claim 1 , wherein the cellulose product has a particle distribution with a D50 of from 5 μm to 200 μm.

12. The composition of claim 1 , wherein the cellulose product has a particle distribution with a D90 of from 40 μm to 600 μm.

13. The composition of claim 1 , wherein the composition further comprises lignin prepared by separating the lignin from the cellulose product.

14. The composition of claim 13 , wherein the separating is achieved by gravity separation, centrifugal separation, centripetal separation, or filtration, or any combination thereof.

15. The composition of claim 13 , wherein the lignin is a purified lignin.

Assignees

• Renmatix Inc

Inventors

• Capanema Ewellyn A
• Balakshin Mikhail Y
• Fitzgibbon Patrick David
• Kosa Matyas
• Mclarty Todd Michael
• Sanderson Charles Sebastian

Classifications

• C08H6/00

  Macromolecular compounds derived from lignin, e.g. tannins, humic acids · CPC title

• C07G1/00

  Low-molecular-weight derivatives of lignin (high-molecular-weight derivatives of lignin {C08H6/00}) · CPC title

• C08L1/02

  Cellulose; Modified cellulose · CPC title

• C09J175/04

  Polyurethanes · CPC title

• C09J161/04

  Condensation polymers of aldehydes or ketones with phenols only · CPC title