GB526636A - Process for the production of celluloses by digestion with calcium hydroxide and subsequent treatment with dilute caustic alkalis - Google Patents
Process for the production of celluloses by digestion with calcium hydroxide and subsequent treatment with dilute caustic alkalisInfo
- Publication number
- GB526636A GB526636A GB920539A GB920539A GB526636A GB 526636 A GB526636 A GB 526636A GB 920539 A GB920539 A GB 920539A GB 920539 A GB920539 A GB 920539A GB 526636 A GB526636 A GB 526636A
- Authority
- GB
- United Kingdom
- Prior art keywords
- digestion
- fibres
- calcium hydroxide
- dilute
- celluloses
- 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
Abstract
526,636. Refining cellulosic materials. HESS, K. March 23, 1939, No. 9205. [Class 2 (ii)] Vegetable material such as straw is subjected to digestion with calcium hydroxide solution and then washed, for example with water, while simultaneously treating the fibres in a beating engine or similar apparatus, and thereafter the fibres are subjected to boiling with dilute caustic alkali solutions. If a dilute acid, e.g. hydrochloric acid, is employed as the washing liquid, the treatment in a beating engine may be omitted. In an example, chopped rye straw is heated with a suspension of milk of lime. After running off the lime, the material is washed in a beating engine until the washing water no longer deposits solids on standing. The fibres are then boiled under pressure with a dilute solution of caustic soda. Specification 493,828 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB920539A GB526636A (en) | 1939-03-23 | 1939-03-23 | Process for the production of celluloses by digestion with calcium hydroxide and subsequent treatment with dilute caustic alkalis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB920539A GB526636A (en) | 1939-03-23 | 1939-03-23 | Process for the production of celluloses by digestion with calcium hydroxide and subsequent treatment with dilute caustic alkalis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB526636A true GB526636A (en) | 1940-09-23 |
Family
ID=9867436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB920539A Expired GB526636A (en) | 1939-03-23 | 1939-03-23 | Process for the production of celluloses by digestion with calcium hydroxide and subsequent treatment with dilute caustic alkalis |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB526636A (en) |
Cited By (1)
| 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 |
-
1939
- 1939-03-23 GB GB920539A patent/GB526636A/en not_active Expired
Cited By (1)
| 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 |
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