GB291065A - Improvements in or relating to processes for separating or extracting cellulose or paper pulp - Google Patents
Improvements in or relating to processes for separating or extracting cellulose or paper pulpInfo
- Publication number
- GB291065A GB291065A GB18740/27A GB1874027A GB291065A GB 291065 A GB291065 A GB 291065A GB 18740/27 A GB18740/27 A GB 18740/27A GB 1874027 A GB1874027 A GB 1874027A GB 291065 A GB291065 A GB 291065A
- Authority
- GB
- United Kingdom
- Prior art keywords
- liquor
- digesting
- paper pulp
- sulphites
- preparation
- 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)
- Extraction Or Liquid Replacement (AREA)
Abstract
291,065. Godfrey, Sir G. C., Benthall, E. C., Tarlton, E. S., and Wheeler, H. F., (trading as Bird & Co.), and Spencer, E. May 28, 1927, [Convention date]. Pulp, preparation of.-In a semi-continuous progressive process for the preparation of cellulose or paper pulp from bamboo, grasses, wood or reeds by digestion under a gradually increasing pressure and digesting liquor concentration, the liquor concentration in the last stage or the composition of the liquor, and if desired the pressure also in the final stage or stages, is reduced or modified so as to reduce the severity of its action and thereby avoid hydrolysis of the fibre. The greatest strength of the digesting liquor is arranged at an earlier stage and preferably at a lower pressure. Mixed digesting liquors are used e.g. caustic, sulphides and/or sulphites, the proportions being adjusted to obtain a greater amount of sulphites, which reduce the tendency toward hydrolysis, in the later stages. The process is particularly applicable to the processes described in Specifications 283,910 and 291,064.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN291065X | 1927-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB291065A true GB291065A (en) | 1928-10-11 |
Family
ID=11076480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18740/27A Expired GB291065A (en) | 1927-05-28 | 1927-07-14 | Improvements in or relating to processes for separating or extracting cellulose or paper pulp |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1761544A (en) |
| GB (1) | GB291065A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2675311A (en) * | 1948-08-09 | 1954-04-13 | John W Natwick | Paper pulp process and apparatus |
| US2885317A (en) * | 1954-03-30 | 1959-05-05 | Stora Kopparbergs Bergslags Ab | Method in manufacturing chemical or semi-chemical pulp from heavily resinous wood |
| JPS6059189A (en) * | 1983-08-24 | 1985-04-05 | ベロイト コ−ポレ−ション | Multi-stage digestion of wood pulp |
-
1927
- 1927-07-14 GB GB18740/27A patent/GB291065A/en not_active Expired
-
1928
- 1928-02-10 US US253311A patent/US1761544A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1761544A (en) | 1930-06-03 |
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