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Found results for
 patents
1.
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Manufacture of nanocellulose and intermediates thereof
| Application Number |
17368920 |
| Grant Number |
12030960 |
| Status |
In Force |
| Filing Date |
2021-07-07 |
| First Publication Date |
2021-10-28 |
| Grant Date |
2024-07-09 |
| Owner |
FINECELLOX AB (Sweden)
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| Inventor |
- Li, Dongfang
- Henschen, Jonatan
- Ek, Monica
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Abstract
The present invention relates to a method for manufacturing nanocellulose comprising the steps of: a) providing a cellulose-containing material wherein the cellulose-containing material contains less than 20 wt. % water, b) contacting the cellulose-containing material with oxalic acid dihydrate, and heating above the melting point of the oxalic acid dihydrate, to obtain cellulose oxalates, c) washing the mixture, d) preparing a suspension comprising the washed material from step c) and e) recovering nanocellulose from the suspension. The present invention relates also to a method of manufacturing nanocellulose intermediate which comprises the above described steps a)-c). The methods disclosed in the present invention are quick, simple, and direct. Pulp can be used as raw material. A considerable amount of free carboxyl groups are introduced. A high yield can be obtained. The methods are inexpensive.
IPC Classes ?
- D21C 9/00 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
- C08B 3/00 - Preparation of cellulose esters of organic acids
- C08B 3/06 - Cellulose acetate
- C08B 3/24 - Hydrolysis or ripening
- C08K 5/11 - EstersEther-esters of acyclic polycarboxylic acids
- C08L 1/10 - Esters of organic acids
- C08L 1/12 - Cellulose acetate
- D21H 11/18 - Highly hydrated, swollen or fibrillatable fibres
- B29C 48/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired formApparatus therefor
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2.
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Manufacture of hydrophobized nanocellulose intermediate as well as hydrophobized nanocellulose
| Application Number |
16621833 |
| Grant Number |
11174324 |
| Status |
In Force |
| Filing Date |
2018-06-18 |
| First Publication Date |
2020-05-21 |
| Grant Date |
2021-11-16 |
| Owner |
FINECELLOX AB (Sweden)
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| Inventor |
- Li, Dongfang
- Henschen, Jonatan
- Ek, Monica
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Abstract
The present invention relates to a method for manufacturing hydrophobized nanocellulose comprising the steps of: a) providing a cellulose-containing material wherein the cellulose-containing material contains less than 20 wt. % water, b) contacting the cellulose-containing material with oxalic acid dihydrate, and heating above the melting point of the oxalic acid dihydrate, to obtain cellulose oxalates, c) washing the mixture, d) preparing a suspension comprising the material from step c) and e) recovering hydrophobized nanocellulose from the suspension. The present invention relates also to a method of manufacturing hydrophobized nanocellulose intermediate which comprises the above described steps a)-c). The methods disclosed in the present invention are quick, inexpensive, simple, and direct. Pulp can be used as raw material.
IPC Classes ?
- C08B 15/02 - OxycelluloseHydrocelluloseCellulose hydrate
- C08B 3/12 - Preparation of cellulose esters of organic acids of polybasic organic acids
- C08B 3/22 - Post-esterification treatments, including purification
- B82Y 40/00 - Manufacture or treatment of nanostructures
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3.
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Manufacture of nanocellulose and intermediates thereof
| Application Number |
16003176 |
| Grant Number |
11084885 |
| Status |
In Force |
| Filing Date |
2018-06-08 |
| First Publication Date |
2018-10-11 |
| Grant Date |
2021-08-10 |
| Owner |
FINECELLOX AB (Sweden)
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| Inventor |
- Li, Dongfang
- Henschen, Jonatan
- Ek, Monica
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Abstract
The present invention relates to a method for manufacturing nanocellulose comprising the steps of: a) providing a cellulose-containing material wherein the cellulose-containing material contains less than 20 wt. % water, b) contacting the cellulose-containing material with oxalic acid dihydrate, and heating above the melting point of the oxalic acid dihydrate, to obtain cellulose oxalates, c) washing the mixture, d) preparing a suspension comprising the washed material from step c) and e) recovering nanocellulose from the suspension. The present invention relates also to a method of manufacturing nanocellulose intermediate which comprises the above described steps a)-c). The methods disclosed in the present invention are quick, simple, and direct. Pulp can be used as raw material. A considerable amount of free carboxyl groups are introduced. A high yield can be obtained. The methods are inexpensive.
IPC Classes ?
- C08B 3/24 - Hydrolysis or ripening
- C08L 1/10 - Esters of organic acids
- D21C 9/00 - After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
- D21H 11/18 - Highly hydrated, swollen or fibrillatable fibres
- C08L 1/12 - Cellulose acetate
- C08B 3/06 - Cellulose acetate
- C08K 5/11 - EstersEther-esters of acyclic polycarboxylic acids
- C08B 3/00 - Preparation of cellulose esters of organic acids
- B29C 48/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired formApparatus therefor
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