US1402210A - Production of cellulose from vegetable matter - Google Patents
Production of cellulose from vegetable matter Download PDFInfo
- Publication number
- US1402210A US1402210A US398980A US39898020A US1402210A US 1402210 A US1402210 A US 1402210A US 398980 A US398980 A US 398980A US 39898020 A US39898020 A US 39898020A US 1402210 A US1402210 A US 1402210A
- Authority
- US
- United States
- Prior art keywords
- cellulose
- vegetable matter
- fibres
- bath
- production
- 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 - Lifetime
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
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
Definitions
- the present invention relates to a cold chemical treatment without pressure, which permits separation of the cellulose from all vegetable matter, impurities and other substances surrounding it. Consideration is taken of the fact that the practical capacity for resistance is limited to a marked degree and, hence, only such materials are used as are favorable to the resistance of the cellulose of the vegetable matter treated, do not deprive it of any of its specific properties, and prevent appreciable loss.
- the plants, leaves or stems, of leaves and stems, according to their type are harvested and then are suitably dried.
- the thus prepared vegetable material is then immersed in cold water and separated into coarse fibres in order to facilitate the subsequent penetration by osmosis of the liquid of the treatment bath, this bath being preferably prepared as follows:
- Anhydrous lime in great quantity is placed on the floor of a container intended for the treatment, and is covered with the vegetable fibres to a desired height.
- a cold alkaline solution of 2 to 4 B6. is supplied thereto in the form of a shower, and thereafter a certain amount of volatile alkali, preferably ammonia, which may be of 2% strength, is supplied to the surface of the bath in the form of a shower or in any other form by any desired means.
- a certain amount of volatile alkali preferably ammonia, which may be of 2% strength
- the fibrous material is thoroughly washed with cold water and is then placed in a fibre press or mill or subjected to the action of other suitable comminuting mechanism.
- the vegetable material may be placed in a fresh bath of the same character as the previous one, but to which a bleaching agent suited to the vegetable matter under treatment has been added immediately before the introduction of the ammonia or other volatile alkali.
- Subsequent baths similar to those mentioned for the preliminary treatment, may be used according to the degree of comminution of the fibres.
- energetic washing with cold water may be carried out for a certain length of time by means of suitable mechanical devices, and the fibres thus obtained may be bleached and refined as considered advisable.
- cellulose fibres are obtained which are completely separated from vegetable matter, impurities and other surrounding substances, so that they are suitable for industrial use, either Without bleaching or after bleaching and further refinement.
- the cellulose thus obtained has properties which will compete with those of the best grades of cellulose.
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Paper (AREA)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1919345314D DE345314C (de) | 1920-07-26 | 1919-08-05 | Verfahren zur Gewinnung von Zellulose aus Pflanzenstoffen auf kaltem Wege ohne Anwendung von Druck |
US398980A US1402210A (en) | 1920-07-26 | 1920-07-26 | Production of cellulose from vegetable matter |
GB27904/20A GB175330A (en) | 1920-07-26 | 1920-10-01 | Improved process of obtaining cellulose from vegetable matter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US398980A US1402210A (en) | 1920-07-26 | 1920-07-26 | Production of cellulose from vegetable matter |
Publications (1)
Publication Number | Publication Date |
---|---|
US1402210A true US1402210A (en) | 1922-01-03 |
Family
ID=23577610
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US398980A Expired - Lifetime US1402210A (en) | 1920-07-26 | 1920-07-26 | Production of cellulose from vegetable matter |
Country Status (3)
Country | Link |
---|---|
US (1) | US1402210A (de) |
DE (1) | DE345314C (de) |
GB (1) | GB175330A (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA752864A (en) * | 1965-10-12 | 1967-02-14 | Pulp And Paper Research Institute Of Canada | Extraction of fibrous cellulosic material with ammonia following treatment with chlorine, chlorine dioxide or other reagents |
CN111188215B (zh) * | 2020-01-10 | 2024-10-01 | 广东叶囵生物科技发展有限公司 | 一种叶子纤维原浆的制作方法 |
-
1919
- 1919-08-05 DE DE1919345314D patent/DE345314C/de not_active Expired
-
1920
- 1920-07-26 US US398980A patent/US1402210A/en not_active Expired - Lifetime
- 1920-10-01 GB GB27904/20A patent/GB175330A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE345314C (de) | 1921-12-09 |
GB175330A (en) | 1922-02-01 |
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