GB910001A - Improvements in or relating to the cooking of lignocellulose fibrous material - Google Patents
Improvements in or relating to the cooking of lignocellulose fibrous materialInfo
- Publication number
- GB910001A GB910001A GB1385159A GB1385159A GB910001A GB 910001 A GB910001 A GB 910001A GB 1385159 A GB1385159 A GB 1385159A GB 1385159 A GB1385159 A GB 1385159A GB 910001 A GB910001 A GB 910001A
- Authority
- GB
- United Kingdom
- Prior art keywords
- container
- steam
- cooking
- effected
- phase
- 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
- D21C7/00—Digesters
-
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/10—Physical methods for facilitating impregnation
-
- 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
- D21C3/24—Continuous 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
- D21C3/26—Multistage processes
Landscapes
- Paper (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Crushing And Pulverization Processes (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
<PICT:0910001/IV(a)/1> Lignocellulosic fibrous material is treated with steam, mechanically compressed to remove liquid and air from the pores of the material, allowed to expand while immersed below the surface of a chemical solution, which applies a hydrostatic over-pressure to the material, cooked in a steam phase at superatmospheric pressure and corresponding temperature, and then cooked in a second chemical solution under substantially the same pressure as in the steam phase. The initial steam treatment may be effected at substantially 100 DEG C. and in the different cooking steps the material may be impregnated with solutions of chemicals of different composition. Preferably cooking a first time in the steam phase and in the liquid phase and a second time in the steam phase is effected while the material is contained within one and the same closed system. Thus the first cooking step in the steam phase may be effected within a container during downwardly directed movement of the material and the cooking step in the liquid phase effected during movement of the material in the same direction in the container and also during an upwardly-directed movement of the material in a second container communicating with the first container at the base of the latter, the second cooking step in the steam phase being effected in the top portion of the second container during upwardly-directed movement of the material within the second container. The material may be disintegrated mechanically while still under the superatmospheric pressure and elevated temperature produced by the cooking steps. Apparatus as shown comprises a plurality of vertical elongated containers 10, 36, 64, 98 traversed in series by the material and including a first container 10 fed with steam via pipe 24 for softening the material, which enters via duct 20, a second container 36 for a solution of chemicals (supplied from 38) within which the material is allowed to expand at a great depth after having been mechanically compressed by a pressing device 30 at a very high pressure in its travel between the two containers and means (56, 58 and cell feeder 62) to transfer the material from the second container to the upper part of a third container 64 intercommunicating with a fourth container 98 at their bases and forming together with the latter a closed system having a supply pipe 80 for steam at superatmospheric pressure, a supply duct 76 for a solution of chemicals and control members 84, 88 to maintain a predetermined level of the solution within these containers, whereby the material is subjected during downwardly directed movement within the third container to an initial cooking operation within a steam zone and to a subsequent cooking operation in a liquid zone, the latter operation also extending into the lower part of the fourth container provided with means 100 for conveying the material upwardly to a steam zone in its upper part. Chemical treatment of the material is conventional, varying according to the intended use of the product. Cooking solutions specified include mixtures of sodium sulphite with either sodium carbonate or sodium hydroxide and sodium sulphide and sodium sulphite solutions. Specification 761,179 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE400258 | 1958-04-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB910001A true GB910001A (en) | 1962-11-07 |
Family
ID=20263318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1385159A Expired GB910001A (en) | 1958-04-24 | 1959-04-23 | Improvements in or relating to the cooking of lignocellulose fibrous material |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE578040A (en) |
CH (1) | CH382546A (en) |
DE (1) | DE1132790B (en) |
ES (1) | ES248917A3 (en) |
FR (1) | FR1222196A (en) |
GB (1) | GB910001A (en) |
NL (2) | NL238470A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015150841A1 (en) | 2014-03-31 | 2015-10-08 | Marinko MIKULIC | A continuous process for production of cellulose pulp from grass-like plant feedstock |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3201307A (en) * | 1962-10-26 | 1965-08-17 | Bauer Bros Co | Pulping equipment and system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE84670C (en) * | ||||
NL44553C (en) * | 1933-09-21 | |||
NL101170C (en) * | 1951-03-22 | |||
DE966918C (en) * | 1952-05-29 | 1957-09-19 | Kamyr Ab | Device for removing cellulose material from pressure vessels |
AT196238B (en) * | 1954-01-07 | 1958-03-10 | Theodor Bell & Cie Ag | Process for preparing semi-pulps and apparatus for carrying out the process |
US2870009A (en) * | 1955-06-15 | 1959-01-20 | Kamyr Ab | Method and apparatus for the separation of liquids from cellulosic pulp |
US2803540A (en) * | 1956-03-06 | 1957-08-20 | Condi Engineering Corp | Wood chip digestion |
-
0
- NL NL129156D patent/NL129156C/xx active
- NL NL238470D patent/NL238470A/xx unknown
-
1959
- 1959-04-21 CH CH7229359A patent/CH382546A/en unknown
- 1959-04-22 FR FR792862A patent/FR1222196A/en not_active Expired
- 1959-04-23 BE BE578040A patent/BE578040A/en unknown
- 1959-04-23 DE DEA31892A patent/DE1132790B/en active Pending
- 1959-04-23 ES ES0248917A patent/ES248917A3/en not_active Expired
- 1959-04-23 GB GB1385159A patent/GB910001A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015150841A1 (en) | 2014-03-31 | 2015-10-08 | Marinko MIKULIC | A continuous process for production of cellulose pulp from grass-like plant feedstock |
US9777429B2 (en) | 2014-03-31 | 2017-10-03 | Marinko Mikulic | Continuous process for production of cellulose pulp from grass-like plant feedstock |
Also Published As
Publication number | Publication date |
---|---|
NL238470A (en) | |
ES248917A3 (en) | 1959-12-01 |
FR1222196A (en) | 1960-06-08 |
BE578040A (en) | 1959-08-17 |
DE1132790B (en) | 1962-07-05 |
NL129156C (en) | |
CH382546A (en) | 1964-09-30 |
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