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Résultats pour
 brevets
1.
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Manufacture of nanocellulose and intermediates thereof
| Numéro d'application |
17368920 |
| Numéro de brevet |
12030960 |
| Statut |
Délivré - en vigueur |
| Date de dépôt |
2021-07-07 |
| Date de la première publication |
2021-10-28 |
| Date d'octroi |
2024-07-09 |
| Propriétaire |
FINECELLOX AB (Suède)
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| Inventeur(s) |
- Li, Dongfang
- Henschen, Jonatan
- Ek, Monica
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Abrégé
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.
Classes IPC ?
- D21C 9/00 - Post-traitement de la pâte de cellulose, p. ex. de la pâte de bois, ou des linters de coton
- C08B 3/00 - Préparation d'esters cellulosiques d'acides organiques
- C08B 3/06 - Acétate de cellulose
- C08B 3/24 - Hydrolyse ou mûrissement
- C08K 5/11 - EstersÉthers-esters d'acides polycarboxyliques acycliques
- C08L 1/10 - Esters des acides organiques
- C08L 1/12 - Acétate de cellulose
- D21H 11/18 - Fibres hautement hydratées, gonflées ou aptes à être fibrillées
- B29C 48/00 - Moulage par extrusion, c.-à-d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désiréeAppareils à cet effet
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2.
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Manufacture of hydrophobized nanocellulose intermediate as well as hydrophobized nanocellulose
| Numéro d'application |
16621833 |
| Numéro de brevet |
11174324 |
| Statut |
Délivré - en vigueur |
| Date de dépôt |
2018-06-18 |
| Date de la première publication |
2020-05-21 |
| Date d'octroi |
2021-11-16 |
| Propriétaire |
FINECELLOX AB (Suède)
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| Inventeur(s) |
- Li, Dongfang
- Henschen, Jonatan
- Ek, Monica
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Abrégé
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.
Classes IPC ?
- C08B 15/02 - OxycelluloseHydrocelluloseHydrate de cellulose
- C08B 3/12 - Préparation d'esters cellulosiques d'acides organiques d'acides organiques polybasiques
- C08B 3/22 - Traitement de post-estérification, y compris la purification
- B82Y 40/00 - Fabrication ou traitement des nanostructures
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3.
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Manufacture of nanocellulose and intermediates thereof
| Numéro d'application |
16003176 |
| Numéro de brevet |
11084885 |
| Statut |
Délivré - en vigueur |
| Date de dépôt |
2018-06-08 |
| Date de la première publication |
2018-10-11 |
| Date d'octroi |
2021-08-10 |
| Propriétaire |
FINECELLOX AB (Suède)
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| Inventeur(s) |
- Li, Dongfang
- Henschen, Jonatan
- Ek, Monica
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Abrégé
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.
Classes IPC ?
- C08B 3/24 - Hydrolyse ou mûrissement
- C08L 1/10 - Esters des acides organiques
- D21C 9/00 - Post-traitement de la pâte de cellulose, p. ex. de la pâte de bois, ou des linters de coton
- D21H 11/18 - Fibres hautement hydratées, gonflées ou aptes à être fibrillées
- C08L 1/12 - Acétate de cellulose
- C08B 3/06 - Acétate de cellulose
- C08K 5/11 - EstersÉthers-esters d'acides polycarboxyliques acycliques
- C08B 3/00 - Préparation d'esters cellulosiques d'acides organiques
- B29C 48/00 - Moulage par extrusion, c.-à-d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désiréeAppareils à cet effet
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