GB343429A - Improvements in or relating to the process of producing cellulosic pulp - Google Patents
Improvements in or relating to the process of producing cellulosic pulpInfo
- Publication number
- GB343429A GB343429A GB31321/29A GB3132129A GB343429A GB 343429 A GB343429 A GB 343429A GB 31321/29 A GB31321/29 A GB 31321/29A GB 3132129 A GB3132129 A GB 3132129A GB 343429 A GB343429 A GB 343429A
- Authority
- GB
- United Kingdom
- Prior art keywords
- digestion
- caustic soda
- cornstalks
- digesting
- liquor
- 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
Landscapes
- Paper (AREA)
Abstract
343,429. Cellulose pulp. CORNSTALK PRODUCTS CO., Inc., 10, East 40th Street, New York, U.S.A.-(Assignees of Darling, E. R. ; P.O. Box 88, Danville, Illinois, U.S.A.) Oct. 15, 1929, No. 31321. Convention date, Dec. 13, 1928. [Class 96.] In the digestion of cellulose material, particularly of plants of annual growth, such as cornstalks, the initial strength of the digesting liquor is maintained constant during the operation. Digestion may be effected by caustic soda or calcium bisulphite, or by caustic soda and sodium sulphite. In the use of caustic soda a strength of one per cent solution is maintained, and, in consequence, the time of digestion is reduced by one quarter and the pressure by one half; for example, in digesting cornstalks the time for digestion is one and a half hours and the pressure two and a half atmospheres, corresponding to a temperature of 137 C. Concentrated or weak solutions, or solid alkali may be introduced, to an amount determined by a curve plotted to show the normal degradation, by means, for example, of an injector or pump. The liquor, separated subsequently by a centrifuge, may, by reason of the refortification be used again up to six times.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US325894A US1845488A (en) | 1928-12-13 | 1928-12-13 | Process of producing cellulosic pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB343429A true GB343429A (en) | 1931-02-16 |
Family
ID=23269925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31321/29A Expired GB343429A (en) | 1928-12-13 | 1929-10-15 | Improvements in or relating to the process of producing cellulosic pulp |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1845488A (en) |
| GB (1) | GB343429A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2810647A (en) * | 1954-12-21 | 1957-10-22 | Valite Corp | Process of preparing fiber from pithcontaining plant materials |
| DE1104810B (en) * | 1957-01-14 | 1961-04-13 | Condi Engineering Corp | Device for the continuous digestion of lignocellulosic material |
| DE1088335B (en) * | 1957-02-21 | 1960-09-01 | West Virginia Pulp & Paper Co | Process for the continuous digestion of wood chips |
| US2944929A (en) * | 1959-01-05 | 1960-07-12 | Hawaiian Dev Company | Rapid soda process for pulping bagasse and other non-woody plant lignocellulose |
-
1928
- 1928-12-13 US US325894A patent/US1845488A/en not_active Expired - Lifetime
-
1929
- 1929-10-15 GB GB31321/29A patent/GB343429A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1845488A (en) | 1932-02-16 |
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