Moisture curable organopolysiloxane composition
US-9527959-B2 · Dec 27, 2016 · US
Catalytic membranes and applications thereof
US9339803B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9339803-B2 |
| Application number | US-201214355364-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 31, 2012 |
| Priority date | Oct 31, 2011 |
| Publication date | May 17, 2016 |
| Grant date | May 17, 2016 |
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Abstract
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In one aspect, catalytic membranes are described herein. In some embodiments, a catalytic membrane comprises a surface functionalized with a polymer, the polymer comprising cellulose solubilization functionalities and acid functionalities for the catalytic hydrolysis of cellulose and/or hemicellulose.
First claim
Opening claim text (preview).
That which is claimed is: 1. A porous catalytic membrane comprising: a surface functionalized with cellulose solubilization functionalities and acid functionalities for the catalytic hydrolysis of cellulose, wherein the cellulose solubilization functionalities are pendant along a polymer chain attached to the surface and comprise one or more imidazolium salts, wherein the functionalized surface is a first side of the porous membrane for receiving cellulose feedstock, the porous membrane having a pore size sufficient to pass glucose molecules, reducing sugar molecules, oligosaccharides or mixtures thereof. 2. The catalytic membrane of claim 1 , wherein the one or more imidazolium salts is of the formula: wherein is a point of attachment to the polymer chain, X − is a counterion and R 1 is selected from the group consisting of hydrogen, alkyl, alkyl-sulfonic acid, alkyl-carboxylic acid and alkyl-phosphonic acid. 3. The catalytic membrane of claim 1 , wherein the one or more imidazolium salts is of the formula: wherein is a point of attachment to the polymer chain, X − is a counterion and R 2 and R 3 are independently selected from the group consisting of -hydrogen and -alkyl. 4. The catalytic membrane of claim 1 , wherein the acid functionalities comprise sulfonic acid, carboxylic acid or phosphonic acid functionalities or mixtures thereof. 5. The catalytic membrane of claim 1 , wherein the acid functionalities are pendant along a cellulose hydrolysis polymer chain attached to the surface of the catalytic membrane. 6. The catalytic membrane of claim 5 , wherein the acid functionalities comprise sulfonic acid, carboxylic acid or phosphonic acid functionalities or mixtures thereof. 7. The catalytic membrane of claim 1 , wherein the oligosaccharides have a molecular weight less than about 500 g/mol. 8. The catalytic membrane of claim 1 , wherein a plurality of pores of the porous membrane are functionalized with acid functionalities for the catalytic hydrolysis of cellulose. 9. The catalytic membrane of claim 1 , wherein the acid functionalities are operable for the catalytic hydrolysis of hemicellulose.
Assignees
Inventors
Classifications
- B01J31/0225Primary
comprising sulfonic acid groups or the corresponding salts · CPC title
Separation of sugars provided for in subclass C13K (C13K3/00 takes precedence) · CPC title
Graft polymerization · CPC title
Chemical modification · CPC title
of an aromatic ring, e.g. pyridinium · CPC title
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Frequently asked questions
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- What does patent US9339803B2 cover?
- In one aspect, catalytic membranes are described herein. In some embodiments, a catalytic membrane comprises a surface functionalized with a polymer, the polymer comprising cellulose solubilization functionalities and acid functionalities for the catalytic hydrolysis of cellulose and/or hemicellulose.
- Who is the assignee on this patent?
- Univ Arkansas, Univ Arkansas, Uni Duisburg Essen
- What technology area does this patent fall under?
- Primary CPC classification B01J31/0225. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 17 2016 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).