GB988464A - Method of manufacturing chemical pulp from lignocellulose material - Google Patents
Method of manufacturing chemical pulp from lignocellulose materialInfo
- Publication number
- GB988464A GB988464A GB26020/61A GB2602061A GB988464A GB 988464 A GB988464 A GB 988464A GB 26020/61 A GB26020/61 A GB 26020/61A GB 2602061 A GB2602061 A GB 2602061A GB 988464 A GB988464 A GB 988464A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquor
- stage
- lignocellulose material
- magnesium
- base
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 title abstract 6
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- 229920001131 Pulp (paper) Polymers 0.000 title 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 6
- 229910052749 magnesium Inorganic materials 0.000 abstract 6
- 239000011777 magnesium Substances 0.000 abstract 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract 4
- 238000010411 cooking Methods 0.000 abstract 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 abstract 4
- 239000000395 magnesium oxide Substances 0.000 abstract 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 235000010269 sulphur dioxide Nutrition 0.000 abstract 2
- 239000004291 sulphur dioxide Substances 0.000 abstract 2
- 239000000835 fiber Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract 1
- 239000000347 magnesium hydroxide Substances 0.000 abstract 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 abstract 1
- JESHZQPNPCJVNG-UHFFFAOYSA-L magnesium;sulfite Chemical compound [Mg+2].[O-]S([O-])=O JESHZQPNPCJVNG-UHFFFAOYSA-L 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 239000002023 wood Substances 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/26—Multistage processes
- D21C3/266—Multistage processes the same pulping agent being used in all stages
-
- 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
- D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
- D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
- D21C3/10—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites magnesium bisulfite
Landscapes
- Paper (AREA)
Abstract
In a process for manufacturing pulp from lignocellulose material e.g. wood chips by a two-stage sulphite digesting process, the cooking liquor for the first-stage is provided by mixing a soluble magnesium-base sulphite liquor and sufficient additional magnesium base in the presence of the lignocellulose material to provide a first-stage soluble cooking liquor having an initial molar ratio of sulphur dioxide to magnesium oxide in the range 1.4-1.85 and an initial pH of 5.9-5.0. The lignocellulose material may be cooked in the presence of the above first-stage liquor until 15-30% of the lignocellulose is dissolved, most of the liquor then being removed (e.g. 60-65% of it), sulphur dioxide added to the digester, and cooking continued to complete the desired fibre liberation of the lignocellulose material. In the first stage, the additional magnesium base is preferably added to the lignocellulose material after addition of the soluble magnesium base sulphite liquor. Further additional magnesium base may be added to the cooking liquor during the first stage in order to maintain the pH in the range 5.9-5.0. The magnesium base may be dry magnesium oxide or hydroxide, aqueous slurries thereof, or may be spent sulphite liquors. By adding additional magnesium base, precipitation of magnesium monosulphite in the liquor is prevented.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47140A US3088861A (en) | 1960-08-03 | 1960-08-03 | Method of manufacturing chemical pulp from lignocellulose material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB988464A true GB988464A (en) | 1965-04-07 |
Family
ID=21947280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26020/61A Expired GB988464A (en) | 1960-08-03 | 1961-07-18 | Method of manufacturing chemical pulp from lignocellulose material |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3088861A (en) |
| DE (1) | DE1298405B (en) |
| GB (1) | GB988464A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE314581B (en) * | 1968-10-29 | 1969-09-08 | Mo Och Domsjoe Ab | |
| SE335053B (en) * | 1969-05-13 | 1971-05-10 | Mo Och Domsjoe Ab | |
| US11235332B2 (en) | 2018-06-14 | 2022-02-01 | Ethicon, Inc. | Accelerated hydrolysis system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1830315A (en) * | 1925-01-29 | 1931-11-03 | Bradley Mckeefe Corp | Monosulphite wood treating process and resulting fiber and paper |
| US2032437A (en) * | 1934-10-11 | 1936-03-03 | Brown Co | Fiber-liberating process |
| BE496841A (en) * | 1949-07-12 | |||
| BE504423A (en) * | 1951-02-28 | |||
| AT175782B (en) * | 1951-02-28 | 1953-08-10 | Waldhof Zellstoff Fab | Process for the production of semi-pulp |
| FR1145782A (en) * | 1956-02-18 | 1957-10-29 | Saint Gobain | Improvements to the cellulose pulp manufacturing process by cooking |
-
1960
- 1960-08-03 US US47140A patent/US3088861A/en not_active Expired - Lifetime
-
1961
- 1961-07-18 GB GB26020/61A patent/GB988464A/en not_active Expired
- 1961-07-26 DE DEW30419A patent/DE1298405B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3088861A (en) | 1963-05-07 |
| DE1298405B (en) | 1969-06-26 |
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