CA2313261A1 - Process for preparing a high purity chemical-free microcrystalline cellulose from a chemically produced cellulose - Google Patents
Process for preparing a high purity chemical-free microcrystalline cellulose from a chemically produced cellulose Download PDFInfo
- Publication number
- CA2313261A1 CA2313261A1 CA002313261A CA2313261A CA2313261A1 CA 2313261 A1 CA2313261 A1 CA 2313261A1 CA 002313261 A CA002313261 A CA 002313261A CA 2313261 A CA2313261 A CA 2313261A CA 2313261 A1 CA2313261 A1 CA 2313261A1
- Authority
- CA
- Canada
- Prior art keywords
- cellulose
- high purity
- microcrystalline cellulose
- pulp
- chemically produced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920000168 Microcrystalline cellulose Polymers 0.000 title abstract 5
- 235000019813 microcrystalline cellulose Nutrition 0.000 title abstract 5
- 239000008108 microcrystalline cellulose Substances 0.000 title abstract 5
- 229940016286 microcrystalline cellulose Drugs 0.000 title abstract 5
- 235000010980 cellulose Nutrition 0.000 title abstract 4
- 229920002678 cellulose Polymers 0.000 title abstract 4
- 239000001913 cellulose Substances 0.000 title abstract 4
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000000034 method Methods 0.000 abstract 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 238000005903 acid hydrolysis reaction Methods 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- 238000004880 explosion Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000002655 kraft paper Substances 0.000 abstract 1
- 235000016709 nutrition Nutrition 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 238000010008 shearing Methods 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- 238000001665 trituration Methods 0.000 abstract 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/001—Modification of pulp properties
- D21C9/007—Modification of pulp properties by mechanical or physical means
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Paper (AREA)
Abstract
A high purity chemical-free microcrystalline cellulose having a low degree od polymerization can be obtained by a process that does not require the use of any acids such as HCl, H2SO4 as are needed in conventional acid hydrolysis processes. This process comprises the steps of preparing a pulp by repulping, filtration and trituration of a chemically produced cellulose. The so-prepared pulp is subjected to heating through a steam explosion treatment in order to obtain a treated pulp. A shearing force is applied onto the pulp at the end of the steam treatment. The treated pulp is then filtered, washed and bleached thereby to obtain the high purity chemical-free microcrystalline cellulose.
With this process, one may produce chemical free microcrystalline cellulose by using chemically produced cellulose such as kraft or bisulfite cellulose as starting material. The high purity microcrystalline cellulose obtained from the present process may be used in the pharmaceutical and nutritional industries.
With this process, one may produce chemical free microcrystalline cellulose by using chemically produced cellulose such as kraft or bisulfite cellulose as starting material. The high purity microcrystalline cellulose obtained from the present process may be used in the pharmaceutical and nutritional industries.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CA1998/000479 WO1999060027A1 (en) | 1998-05-14 | 1998-05-14 | Process for preparing a high purity chemical-free microcrystalline cellulose from a chemically produced cellulose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2313261A1 true CA2313261A1 (en) | 1999-11-25 |
| CA2313261C CA2313261C (en) | 2002-02-12 |
Family
ID=4173298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002313261A Expired - Fee Related CA2313261C (en) | 1998-05-14 | 1998-05-14 | Process for preparing a high purity chemical-free microcrystalline cellulose from a chemically produced cellulose |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1082348A1 (en) |
| AU (1) | AU7421698A (en) |
| CA (1) | CA2313261C (en) |
| WO (1) | WO1999060027A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8710107B2 (en) | 2006-04-05 | 2014-04-29 | Woodland Biofuels Inc. | System and method for converting biomass to ethanol via syngas |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR0115148A (en) * | 2000-11-03 | 2004-07-20 | Kemestrie Inc | Process for producing low polymerization microcrystalline cellulose |
| KR100376203B1 (en) * | 2000-12-26 | 2003-03-15 | 한국에너지기술연구원 | A method of decomposing cellulose with sulfuric acid and various sulfate additives under sub- and supercritical water |
| CA2383279A1 (en) * | 2002-05-06 | 2003-11-06 | Sylvain Cloutier | Reactor |
| FI20126168A (en) * | 2012-11-07 | 2014-05-08 | Metsä Fibre Oy | A method for opening pulp-containing fibers |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4461648A (en) * | 1980-07-11 | 1984-07-24 | Patrick Foody | Method for increasing the accessibility of cellulose in lignocellulosic materials, particularly hardwoods agricultural residues and the like |
| CA1198703A (en) * | 1984-08-02 | 1985-12-31 | Edward A. De Long | Method of producing level off d p microcrystalline cellulose and glucose from lignocellulosic material |
| ES2174830T3 (en) * | 1991-02-21 | 2002-11-16 | Genencor Int | PROCEDURE TO CONVERT A CELLULOSE MATERIAL IN CELLULOSE CRIST ALINA. |
| DE4342442C2 (en) * | 1993-12-13 | 1996-11-21 | Akzo Nobel Nv | Process for the production of level-off DP cellulose (LODP cellulose) and its disaggregation to microcrystalline cellulose |
-
1998
- 1998-05-14 CA CA002313261A patent/CA2313261C/en not_active Expired - Fee Related
- 1998-05-14 WO PCT/CA1998/000479 patent/WO1999060027A1/en not_active Application Discontinuation
- 1998-05-14 EP EP98921305A patent/EP1082348A1/en not_active Withdrawn
- 1998-05-14 AU AU74216/98A patent/AU7421698A/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8710107B2 (en) | 2006-04-05 | 2014-04-29 | Woodland Biofuels Inc. | System and method for converting biomass to ethanol via syngas |
Also Published As
| Publication number | Publication date |
|---|---|
| AU7421698A (en) | 1999-12-06 |
| EP1082348A1 (en) | 2001-03-14 |
| CA2313261C (en) | 2002-02-12 |
| WO1999060027A1 (en) | 1999-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |