GB347096A - Improvements in or relating to the manufacture of paper - Google Patents
Improvements in or relating to the manufacture of paperInfo
- Publication number
- GB347096A GB347096A GB37577/29A GB3757729A GB347096A GB 347096 A GB347096 A GB 347096A GB 37577/29 A GB37577/29 A GB 37577/29A GB 3757729 A GB3757729 A GB 3757729A GB 347096 A GB347096 A GB 347096A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquor
- chest
- fed
- passed
- treated
- 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
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
-
- 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
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
Abstract
347,096. Cellulose. MEAD RESEARCH ENGINEERING CO., City National Bank Building, Dayton, Ohio, U.S.A.-(Assignees of Traquair, J. ; of Mead Pulp & Paper Co., Chillicothe, Ohio, U.S.A.)' Dec. 7. 1929, No. 37577. Convention date, Dec. 29, 1928. [Class 96.] In a preparation of paper pulp suitable for the manufacture of high-grade paper from straw, cereal grasses (such as esparto), cane, bamboo, reeds and the like, the material is first subjected to the action of an alkaline solution of dilute concentration, at a temperature below 110 C. and at a low pressure, until the more reactive encrusting substances have been dissolved, and then to a second stage cooking treatment at a much higher temperature and pressure in the presence of the retained chemical cooking liquor substantially less concentrated in active chemical. The treated material is then subjected in accordance with the amount of encrusting sub. stances still remaining to the action of a chlorinating agent in one or two stages. The material may be reduced to a high consistency and treated with chlorine gas, or may be diluted to a low consistency and treated with a chlorinating agent in a manner such as to prevent rise in temperature and then raised to a higher consistency and again treated with a chlorinating agent. The material is fed through a duster mechanism 13, Fig. 1, to a discharge shoot 15 where it is sprayed by a pipe 18 with hot caustic liquor and passed to a steeping tank 30. A mild alkaline liquor is used and the temperature and pressure are controlled to maintain them at comparatively low levels. The material is fed through by a screw 40 at such a speed as to allow approximately half an hour to an hour for the treatment. The treated material is removed by a bucket conveyer 48, surplus liquid drawling back to the tank. Dirt &c. settles through the false bottom 32, is filtered at 70 and the liquor is forced by a pump 73 back through a heater 74 to the tank. The conveyer 48 passes the material to an expeller 55 to remove excess liquor, which passes to the pump 73. The consister.cy of the material having been raised it is passed by a screw 82 to the hopper 86 of a digester 88 where it is cooked at a higher temperature and pressure. When the digestion is completed the slow-out valve 94 is opened and the material is ejected against an impact plate 100 situated in a chamber 101. A discharge valve 104 distributes the pulped mass into a blow-pit 105 whence it is fed to the makedown chest 106. Liquor is supplied to the chest 106 through a pipe 118 and a screw 115 passes the diluted pulp mass to the mixing chest 119, whence it is forced by a pump 120 to a head box 125. Excess stock passes back to the chest 106 through pipe 127. The stock is passed over a weir 130 in the box 125 to a mixing box 132 and thence through a rotary vacuum filter 138 to a shoot 142. The black liquor sucked from the material by the filter 138 is discharged into a second head box 151, the excess black liquor being discharged down the pipe 118 to the make-down chest 106. A second weir 161 in the box 151 enables controlled amounts of the black liquor to be passed through a recovery plant 163, and a heater 165 to the spray 18. The material from the shoot 142 if it contains only about 5 per cent of remaining shives and hard bundles of fibres is dewatered to increase its consistency to 15 per cent or higher by means of a rotor 171, Fig. 2, and rotary screen 175 and is fed bv a shoot 180 to an elevator 182 which discharges it into a hopper 184 whence it is fed by a screw 185 to a chlorinating tower 183. A controlled supply of gas is fed through a pipe 190. Water or other slushing liquid is supplied at the base to dilute the stock and pass it out at the base of the tower either to a storage tank or through a tank 199 where it is mixed with alkali, through a rotary filter 209, bleaching tanks 215, 216, 217 and a further rotary filter 224 to the stock chest 226. If the material from the shoot 142 contains more than about 5 per cent of shives &c. it may be treated to a two-stage chlorinating process. The stock is first diluted and passed through a tant at a controlled rate with a supply of chlorine water, or other agent, it is then washed and, if desired, steeped in alkali, dewatered and passed for further treatment to a chlorinating tower similar to that described above.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB26218/29A GB339334A (en) | 1929-08-28 | 1929-08-28 | Improvements in or relating to the manufacture of paper and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
GB347096A true GB347096A (en) | 1931-04-07 |
Family
ID=10240185
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB31330/30A Expired GB339599A (en) | 1929-08-28 | 1929-08-28 | Improvements in or relating to the manufacture of paper |
GB26218/29A Expired GB339334A (en) | 1928-04-27 | 1929-08-28 | Improvements in or relating to the manufacture of paper and the like |
GB37578/29A Expired GB341226A (en) | 1929-08-28 | 1929-12-07 | Improvements in or relating to the manufacture of paper and the like |
GB37577/29A Expired GB347096A (en) | 1929-08-28 | 1929-12-07 | Improvements in or relating to the manufacture of paper |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB31330/30A Expired GB339599A (en) | 1929-08-28 | 1929-08-28 | Improvements in or relating to the manufacture of paper |
GB26218/29A Expired GB339334A (en) | 1928-04-27 | 1929-08-28 | Improvements in or relating to the manufacture of paper and the like |
GB37578/29A Expired GB341226A (en) | 1929-08-28 | 1929-12-07 | Improvements in or relating to the manufacture of paper and the like |
Country Status (3)
Country | Link |
---|---|
US (4) | US1843465A (en) |
FR (3) | FR681218A (en) |
GB (4) | GB339599A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4746404A (en) * | 1984-05-01 | 1988-05-24 | Laakso Oliver A | Chip presteaming and air washing |
US20170268168A1 (en) * | 2016-02-29 | 2017-09-21 | Shandong Tralin Paper Co., Ltd. | Method for Continuously Cooking Grass Raw Materials and Device |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE748949C (en) * | 1938-01-26 | 1944-11-14 | Margarete Possanner Von Ehrent | Process for producing semi-pulp or cellulose |
US2516664A (en) * | 1944-10-16 | 1950-07-25 | West Virginia Pulp & Paper Co | Hypochlorite bleaching of ground wood |
US2435566A (en) * | 1944-10-16 | 1948-02-10 | West Virginia Pulp & Paper Co | Peroxide bleaching of ground wood |
NL129513C (en) * | 1946-01-01 | |||
US2719788A (en) * | 1949-11-14 | 1955-10-04 | Mo Och Domsjoe Ab | Producing bleached sulphite pulp with high strength properties from hardwoods |
US2730426A (en) * | 1951-06-20 | 1956-01-10 | Cellulose Dev Corp Ltd | Treating vegetable fibrous material with chlorine gas |
US2872314A (en) * | 1954-07-12 | 1959-02-03 | Waldorf Paper Products Co | Method of making pulp |
US2947655A (en) * | 1955-04-21 | 1960-08-02 | Bauer Bros Co | Method of producing wood pulp |
US2858213A (en) * | 1956-04-20 | 1958-10-28 | Condi Engineering Corp | Wood chip digestion |
US3016324A (en) * | 1957-03-07 | 1962-01-09 | Bauer Bros Co | Method and apparatus for producing wood pulp |
US3035963A (en) * | 1958-02-19 | 1962-05-22 | Lummus Co | Process for the continuous digestion of cellulosic materials |
US3092537A (en) * | 1959-06-05 | 1963-06-04 | Cons Paper Corp Ltd | Flameproofing of organic materials |
US3819470A (en) * | 1971-06-18 | 1974-06-25 | Scott Paper Co | Modified cellulosic fibers and method for preparation thereof |
NO137651C (en) * | 1975-10-31 | 1978-03-29 | Myrens Verksted As | PROCEDURE AND APPARATUS FOR CONTINUOUS TREATMENT OF FINDEL FIBER MATERIAL OR CELLULOSIZED MASS WITH GAS WITHOUT COVER. |
US4560572A (en) * | 1981-08-19 | 1985-12-24 | Sharkey Watanabe | Citrus fruit processing and food product |
CN109112873A (en) * | 2018-08-13 | 2019-01-01 | 薛润林 | The method of twin-screw extruder production purified cotton |
-
1928
- 1928-04-27 US US273241A patent/US1843465A/en not_active Expired - Lifetime
- 1928-12-29 US US329080A patent/US1843466A/en not_active Expired - Lifetime
- 1928-12-29 US US329082A patent/US1880587A/en not_active Expired - Lifetime
- 1928-12-29 US US329081A patent/US1843467A/en not_active Expired - Lifetime
-
1929
- 1929-08-28 GB GB31330/30A patent/GB339599A/en not_active Expired
- 1929-08-28 GB GB26218/29A patent/GB339334A/en not_active Expired
- 1929-09-02 FR FR681218D patent/FR681218A/en not_active Expired
- 1929-12-07 GB GB37578/29A patent/GB341226A/en not_active Expired
- 1929-12-07 GB GB37577/29A patent/GB347096A/en not_active Expired
- 1929-12-24 FR FR688125D patent/FR688125A/en not_active Expired
- 1929-12-24 FR FR688124D patent/FR688124A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4746404A (en) * | 1984-05-01 | 1988-05-24 | Laakso Oliver A | Chip presteaming and air washing |
US20170268168A1 (en) * | 2016-02-29 | 2017-09-21 | Shandong Tralin Paper Co., Ltd. | Method for Continuously Cooking Grass Raw Materials and Device |
US10053816B2 (en) * | 2016-02-29 | 2018-08-21 | Shandong Tralin Paper Co., Ltd. | Method for continuously cooking grass raw materials and device |
Also Published As
Publication number | Publication date |
---|---|
GB341226A (en) | 1931-01-15 |
GB339334A (en) | 1930-11-28 |
GB339599A (en) | 1930-11-28 |
US1843467A (en) | 1932-02-02 |
FR681218A (en) | 1930-05-12 |
US1843466A (en) | 1932-02-02 |
FR688125A (en) | 1930-08-19 |
FR688124A (en) | 1930-08-19 |
US1843465A (en) | 1932-02-02 |
US1880587A (en) | 1932-10-04 |
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