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.
Description
UNHTED. STATES PATENT QFEEQE.
GONZALO JOSE BUSTAMANTE, OF SOUTH. HADLEY, MASSACHUSETTS.
PRODUCTION OF CELLULUSE FROM VEGETABLE MATTER.
N0 Drawing.
To all whom it may concern:
Be it known that I, GoNzALo J OSE BUSTA- MANTE, a subject of the King of Spain, and resident of South Hadley, in the county of Hampshire and State of Massachusetts, have invented certain new and useful Improvements in the Production of Cellulose from Vegetable Matter, of which the following is a specification.
It is generally known that cellulose obtained from vegetable matter such as lichens, trees, plants and shrubs of various kinds is capable of offering a certain amount of resistance to the destructive action of heat, pressure, acids and other natural agencies of like character. Theoretically, this power of resistance is unlimited; but practical experiments have proven that there is a definite limit, and that not only is the cellulose decomposed but a very considerable part thereof is lost.
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.
In carrying out the present process, 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. When the activity of the bath reaches its height, the bath is acjdulated gradually with hydrochloric V Specification of Letters Patent. Patented J an, 3, 1922, Application filed July 26, 1920. Serial No 398,980.
acid in ratio of 2:1000, and then with sulfuric acid in ratio of 1:1000.
After this bath, to the action of which the material may be subjected, for example, for slx hours, 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. According to its character, 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.
After the more or less great time of treatment in the bath, 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.
According to this method of treatment, 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.
I claim as my invention:
1. The process of obtaining cellulose from vegetable matter, which consists in immersing the vegetable matter to be treated in cold water; separating it into coarse fibres; depositing the fibres in a receptacle containing anhydrous lime; successively supplying a .cold alkaline solution and a solution of volatile alkali to said receptacle; successively acidulating the bath thus formed with hydrochloric and sulfuric acids; thereafter washing the fibres with cold Water; and finally comminuting said fibres.
2. The process of obtaining cellulose from vegetable matter, which consists in immersing the vegetable matter to be treated in cold water; separating it into coarse fibres; subj eating the fibres to the action of a bath comprising anhydrous lime, a cold alkaline solution and a solution of volatile alkali; acidulat ng said bath; thereafter washing the fibres with cold Water; and finally comminuting said fibres.
3. A process according to claim 2 in which a bleach agent is added to the bath before the volatile alkali solution.
4. The process of Obtaining cellulose from vegetable matter, Which consists in drying the vegetable matter to be treated; immersing it in cold Water; separating it into coarse fibres; depositing the fibres in a receptacle 10 formed; thereafter Washing the fibres; and 15 finally comminuting said fibres.
In testimony whereof I aflix my signature. G. J. BUSTAMANTE.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1919345314D DE345314C (en) | 1920-07-26 | 1919-08-05 | Process for the cold extraction of cellulose from vegetable matter without the application of pressure |
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 (en) |
DE (1) | DE345314C (en) |
GB (1) | GB175330A (en) |
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 |
CN111188215A (en) * | 2020-01-10 | 2020-05-22 | 广东叶囵生物科技发展有限公司 | Preparation method of leaf fiber raw stock |
-
1919
- 1919-08-05 DE DE1919345314D patent/DE345314C/en 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 |
---|---|
GB175330A (en) | 1922-02-01 |
DE345314C (en) | 1921-12-09 |
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