EP0063565A1 - Verwendung von äthanol bei alkalischer pulpierung - Google Patents
Verwendung von äthanol bei alkalischer pulpierungInfo
- Publication number
- EP0063565A1 EP0063565A1 EP19810901196 EP81901196A EP0063565A1 EP 0063565 A1 EP0063565 A1 EP 0063565A1 EP 19810901196 EP19810901196 EP 19810901196 EP 81901196 A EP81901196 A EP 81901196A EP 0063565 A1 EP0063565 A1 EP 0063565A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ethanol
- pulping
- wood
- pulp
- naoh
- 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.)
- Withdrawn
Links
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000004537 pulping Methods 0.000 title claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 14
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000002023 wood Substances 0.000 claims description 10
- 241000218657 Picea Species 0.000 claims description 5
- 235000011121 sodium hydroxide Nutrition 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/20—Pulping cellulose-containing materials with organic solvents or in solvent environment
Definitions
- This invention relates to wood pulping using chemical pulping media and more particularly relates to such media which result in superior wood pulps with a lower refining energy requirement.
- a method for manufacturing wood pulp which comprises pulping wood with a mixture of ethanol and sodium hydroxide.
- the invention also includes wood pulp manufactured in accordance with the method. DETAILED DESCRIPTION OF THE INVENTION
- the pulping time in accordance with the preferred embodiment, is from about 1/2 to about 4 hours and the pulping temperature is from about 100 to about 200°C.
- any wood can be pulped in accordance with the method of the invention to obtain a superior wood pulp than was obtained by commercially usuable prior arti chemical wood pulping methods.
- Spruce chips are cooked in an electrically heated digester with mixtures of water and ethanol (1 :1 by volume), at a 5:1 liquor to wood ratio, 170°C for 2-1/2 hr.
- cooks under the same conditions were carried out with the addition of 20% NaOH (calculated on wood), and with alkali alone.
- Table 1 shows that ethanol plus NaOH (column 1) is more effective than either ingredient alone
- the ethanol-NaOH process is especially significant in the area of high-yield pulping, because it allows a greater preservation of carbohydrates than NaOH alone. So, e.g., an ethanol-NaOH pulp of 81.6% yield (obtained with 5% NaOH, 170°C, 45 min.) has a Kappa number of 157, while a soda pulp (obtained with 20% NaOH) of 66% yield has a very similar (147) Kappa number. This is because in soda pulping only limited delignif ication can occur, thus low Kappa number pulps are obtained.
Landscapes
- Paper (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US1980/001451 WO1982001568A1 (en) | 1980-10-29 | 1980-10-29 | Use of ethanol in alkaline pulping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0063565A1 true EP0063565A1 (de) | 1982-11-03 |
Family
ID=22154626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19810901196 Withdrawn EP0063565A1 (de) | 1980-10-29 | 1980-10-29 | Verwendung von äthanol bei alkalischer pulpierung |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0063565A1 (de) |
| WO (1) | WO1982001568A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3212767A1 (de) * | 1982-04-06 | 1983-10-06 | Nicolaus Md Verwaltungsges | Verfahren und reaktor zum kontinuierlichen aufschliessen von pflanzenfasermaterial |
| AT510346A1 (de) | 2010-09-02 | 2012-03-15 | Annikki Gmbh | Ligningewinnung |
| AR091998A1 (es) | 2012-05-03 | 2015-03-18 | Annikki Gmbh | Procedimiento de preparacion de celulosa con baja concentracion de lignina |
| HUE041549T2 (hu) | 2013-11-20 | 2019-05-28 | Annikki Gmbh | Eljárás lignocellulózok frakcionálására |
| EP4722446A1 (de) | 2024-10-01 | 2026-04-08 | Annikki GmbH | Verfahren zur herstellung von zellstoff |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2166540A (en) * | 1937-12-17 | 1939-07-18 | Univ Minnesota | Alcoholic treatment of ligneous cellulosic material |
| JP3093387B2 (ja) * | 1991-12-02 | 2000-10-03 | キヤノン株式会社 | 測定装置 |
-
1980
- 1980-10-29 EP EP19810901196 patent/EP0063565A1/de not_active Withdrawn
- 1980-10-29 WO PCT/US1980/001451 patent/WO1982001568A1/en not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8201568A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1982001568A1 (en) | 1982-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE FR GB LU NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19821227 |