GB997359A - Chemical process for pulping wood - Google Patents
Chemical process for pulping woodInfo
- Publication number
- GB997359A GB997359A GB18541/62A GB1854162A GB997359A GB 997359 A GB997359 A GB 997359A GB 18541/62 A GB18541/62 A GB 18541/62A GB 1854162 A GB1854162 A GB 1854162A GB 997359 A GB997359 A GB 997359A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silicic acid
- silicate
- major portion
- wood
- pulp
- 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
- 239000002023 wood Substances 0.000 title abstract 3
- 238000001311 chemical methods and process Methods 0.000 title 1
- 238000004537 pulping Methods 0.000 title 1
- 238000000034 method Methods 0.000 abstract 4
- 235000012239 silicon dioxide Nutrition 0.000 abstract 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 2
- 229910021653 sulphate ion Inorganic materials 0.000 abstract 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract 1
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
- 238000010411 cooking Methods 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000004571 lime Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 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
- D21C3/222—Use of compounds accelerating the pulping processes
Landscapes
- Paper (AREA)
Abstract
Wood is pulped for the manufacture of paper by digestively treating it in sulphate cooking liquor to which has been added silicic acid or an alkali silicate, or more than one of these materials in an amount of 0.01% to 1% calculated as SiO2 as a percentage of the oven-dry weight of the wood treated. Black liquor from the process may be evaporated and burned; salt cake may be added and the product dissolved and causticized with lime to yield a white liquor which can then be reused with further silicic acid or silicate. A composite sheet may be made by supplying a major portion of pulp to the wire of a Fourdrinier machine, and then after partial dewatering superimposing a minor portion of pulp, the minor portion having been treated by the process of the invention, the major portion by a conventional sulphate process, or by a process using a lower proportion of silicic acid or silicate than the major portion.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US111030A US3147178A (en) | 1961-05-18 | 1961-05-18 | Sulphate digestion process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB997359A true GB997359A (en) | 1965-07-07 |
Family
ID=22336244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18541/62A Expired GB997359A (en) | 1961-05-18 | 1962-05-14 | Chemical process for pulping wood |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3147178A (en) |
| GB (1) | GB997359A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4331507A (en) * | 1979-12-10 | 1982-05-25 | Dorr-Oliver Incorporated | Desilication in alkaline pulp processes |
| US5118389A (en) * | 1990-07-06 | 1992-06-02 | Ici Canada Inc. | Two-stage peroxide bleaching process using different amounts of peroxide on different portions of mechanical pulp |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1775405A (en) * | 1927-11-02 | 1930-09-09 | Neumann John | Art of paper making |
| US2286942A (en) * | 1939-07-11 | 1942-06-16 | Int Paper Co | Method of manufacturing paper and/or board |
| US2632736A (en) * | 1946-08-22 | 1953-03-24 | Dow Chemical Co | Antifoaming composition |
| US2881672A (en) * | 1955-10-14 | 1959-04-14 | St Annes Board Mill Co Ltd | Method and apparatus for manufacturing paper or fibrous board |
| US3054717A (en) * | 1959-08-19 | 1962-09-18 | Masonite Corp | Method of producing lignocellulose hardboard |
-
1961
- 1961-05-18 US US111030A patent/US3147178A/en not_active Expired - Lifetime
-
1962
- 1962-05-14 GB GB18541/62A patent/GB997359A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3147178A (en) | 1964-09-01 |
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