GB703102A - Improvements in and relating to the production of wood pulp - Google Patents
Improvements in and relating to the production of wood pulpInfo
- Publication number
- GB703102A GB703102A GB14727/51A GB1472751A GB703102A GB 703102 A GB703102 A GB 703102A GB 14727/51 A GB14727/51 A GB 14727/51A GB 1472751 A GB1472751 A GB 1472751A GB 703102 A GB703102 A GB 703102A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wood
- copper
- vessel
- chips
- container
- 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
- 229920001131 Pulp (paper) Polymers 0.000 title abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract 6
- 229910052802 copper Inorganic materials 0.000 abstract 6
- 239000010949 copper Substances 0.000 abstract 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 abstract 4
- 239000002023 wood Substances 0.000 abstract 4
- BWFPGXWASODCHM-UHFFFAOYSA-N copper monosulfide Chemical compound [Cu]=S BWFPGXWASODCHM-UHFFFAOYSA-N 0.000 abstract 3
- 239000004291 sulphur dioxide Substances 0.000 abstract 3
- 235000010269 sulphur dioxide Nutrition 0.000 abstract 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract 2
- 238000010411 cooking Methods 0.000 abstract 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 abstract 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 abstract 1
- 241000218657 Picea Species 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 235000011132 calcium sulphate Nutrition 0.000 abstract 1
- 239000001175 calcium sulphate Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 235000010265 sodium sulphite Nutrition 0.000 abstract 1
- 229910021653 sulphate ion 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
-
- 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
- D21C3/224—Use of means other than pressure and temperature
Landscapes
- Paper (AREA)
Abstract
Wood-pulp is obtained by cooking wood-chips with an aqueous solution of a bisulphite containing an excess of sulphur dioxide, the sulphite liquor being continuously circulated through a closed system comprising a vessel containing the wood-chips, one or more heaters, a second vessel containing copper, which may be in the form of gauze or filings, and a separating device, such as a filter, for removing copper sulphide from the liquor before it is again passed through the vessel containing the wood. The presence of copper inhibits or <PICT:0703102/IV(a)/1> reduces the formation of sulphate, particularly scale-forming calcium sulphate. Copper sulphide is formed during the cooking. As shown, wood chips are packed in vessel 1, and the sulphite liquor is continuously circulated through vessel 1, external heater 2, pump 3, a second heater 4, a container 5 containing copper, and a filter 6 for removing copper sulphide. If desired, the vessel for the wood, the vessel for the copper, and the filter, may be built into a single container which has three separate but connected compartments. In an example, spruce wood-chips are packed in container 1, and copper gauze is placed in container 5. Sulphite liquor containing 6 per cent. total sulphur dioxide and 1.2 per cent. combined sulphur dioxide in the form of sodium sulphite is continuously circulated through the system, the temperature being raised gradually to 110 DEG C., kept at this temperature for 2.5 hours, then raised gradually to 150 DEG C., and maintained at this point for 1.67 hours. The maximum pressure is 120 lb. per sq. in. Specification 206,570, [Class 2 (ii)] is referred to. The Provisional Specification describes a process in which the sulphite liquor, the wood, and the copper are heated together in a single vessel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB14727/51A GB703102A (en) | 1951-06-21 | 1951-06-21 | Improvements in and relating to the production of wood pulp |
| US285244A US2683090A (en) | 1951-06-21 | 1952-04-30 | Production of wood pulp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB14727/51A GB703102A (en) | 1951-06-21 | 1951-06-21 | Improvements in and relating to the production of wood pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB703102A true GB703102A (en) | 1954-01-27 |
Family
ID=10046409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14727/51A Expired GB703102A (en) | 1951-06-21 | 1951-06-21 | Improvements in and relating to the production of wood pulp |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2683090A (en) |
| GB (1) | GB703102A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE453840B (en) * | 1984-12-21 | 1988-03-07 | Mo Och Domsjoe Ab | METHOD OF PRODUCING CELLULOSAMASSA |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US360484A (en) * | 1887-04-05 | sohnuemann | ||
| US483942A (en) * | 1892-10-04 | Digester |
-
1951
- 1951-06-21 GB GB14727/51A patent/GB703102A/en not_active Expired
-
1952
- 1952-04-30 US US285244A patent/US2683090A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2683090A (en) | 1954-07-06 |
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