US1780750A - Method of preparing cellulose pulp - Google Patents
Method of preparing cellulose pulp Download PDFInfo
- Publication number
- US1780750A US1780750A US411219A US41121929A US1780750A US 1780750 A US1780750 A US 1780750A US 411219 A US411219 A US 411219A US 41121929 A US41121929 A US 41121929A US 1780750 A US1780750 A US 1780750A
- Authority
- US
- United States
- Prior art keywords
- pulp
- bagasse
- cellulose
- bearing material
- digestor
- 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
- 229920002678 cellulose Polymers 0.000 title description 26
- 239000001913 cellulose Substances 0.000 title description 26
- 238000000034 method Methods 0.000 title description 13
- 241000609240 Ambelania acida Species 0.000 description 20
- 239000010905 bagasse Substances 0.000 description 20
- 239000000463 material Substances 0.000 description 19
- 238000010411 cooking Methods 0.000 description 12
- 238000010009 beating Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 241000209504 Poaceae Species 0.000 description 7
- 239000010902 straw Substances 0.000 description 7
- 239000002023 wood Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 229920000297 Rayon Polymers 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 4
- 239000002964 rayon Substances 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000007201 Saccharum officinarum Nutrition 0.000 description 2
- 240000000111 Saccharum officinarum Species 0.000 description 2
- 239000004902 Softening Agent Substances 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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
- D21C3/18—Pulping cellulose-containing materials with halogens or halogen-generating compounds
-
- 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
- D21C3/224—Use of means other than pressure and temperature
-
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
Definitions
- This invention relates to new and useful improvements in'a method of preparing cellulose pulp from cellulose bearing material such as bagasse, straws, grasses, wood, cornstalk and the like.
- the invention relates to similar subject matter as disclosed in my copending application, Serial Number 410,702, filed simultaneously with this application.
- the invention proposes simultaneous cooking, beating and electrically and chemically treating bagasse, straws, grasses, wood, cornstalk and the like for forming a pulp capable of being used in well known manner for manufacturing paper, rayon, etc., and which besides distinguishing in the reduction of the cost of the pulp, differs in the production of a higher grade of pulp. It may be obvious that if various steps of a method could be performed simultaneous, that time will be saved, but the producing of a superior product or the possibility of simultaneously performing all of the steps without interference of the steps with each other could not preyiously be recognized, except by actual trymg.
- bagasse which is typical of the various cellulose materials previously mentioned. It may be well to call attention that sugar cane is usually cut by a hand cutter a few inches above the ground, because the vegetation of the cane occurs in a junglelike field. After the sugar cane is cut, it is heaped and loaded in a cart and delivered to a factory. The upper part of the cane which forms the leaves and branches is removed and the cane proper is dumped into a crushing machine. The crushing machine has crushing rollers which squeeze out the juice which is used for preparing sugar. The remainder is the bagasse. Millions of tons of this bag-asse must be carried away from the sugar mills and destroyed by burning or otherwise.
- the present invention utilizes this bagasse so that it is possible to refine it and make pulp of good quality cheaply and on a commercial basis.
- the pulp produced may be used for making paper, rayon or the like, by methods which are well known.
- one method is cited which consists in feeding the pulp as obtained from the crusher to a conveyor, drying out the moisture from the pulp by a suitable suction device beneath the conveyer and spreading the pulp into paper sheets after the removal of the moisture. It is necessary to refine the pulp before feeding it to the conveyer by various treatments and coloring to conform with particular requirements.
- the paper may be manufactured to be of different grades depending upon the quality or thickness of the fibres in the pulp which is of cottonlike texture.
- the above method of making paper is conventional, but the particular transforming of the bagasse into pulp as follows, is new.
- the shredded bagasse as obtained from the crusher must first be washed for removing various impurities such as the remains of the juice dirt, sand and other foreign matter, and then must be fed into a container which is generally known as a digest or by means of a conveyer or thru a manhole. Water is supplied into the conveyer with the shredded bagasse preferably a sufficient amount to cover all of the latter element.
- a plurality of rods are loosely located in the bottom part of the digestor so that upon rotation these rods may move around and accomplish proper beating of the shredded bagasse.
- These rods may be round or of any other suitable shape and may be formed with depressions, slots, grooves or the like.
- Sodium chloride is added to the water in the digester and one terminal of an electric source is connected at one end of the digestor and the other terminal to the other end.
- the current is then passed thru the liquid in the. digestor and electrolytical and chemical action takes place forming sodium hydroxide and chlorine, and siml'lltaneously the digestor is rotated by mechanical means for about two hours.
- This treatment constitutes a powerful softening agent for the shredded bagasse. It is advisable that 10 pounds of sodium chloride be added to 100 pounds of shredded bagasse in 100 gallons of Water;
- the digestor After two hours of rotation, the digestor is stopped and lime and soda ash is added. Then the digestor is again rotated and simultaneously steam is supplied within it at a pressure of from thirty to fifty pounds. The digestor is now allowed to rotate for a period of from one to two hours. During this period, the steam cooks the contents of the digestor and adds to the softening of the bagasse. Preferably the digestor should rotate at eighteen revolutions per minute. When the machine is stopped, the material is dumped into a container and the juice or water drains off. The resultant matter is the pulp which is to be used in the preparation of paper, rayon and the like by any conventional method.
- the resultant matter is the pulp which is to be used in the preparation of paper, rayon and the like by any conventional method.
- juice or water may be used for the recovery of by-products such as fertilizers, etc.
- the invention method eliminates the necessity of many operations. It eliminates the beating of the pulp either partially or completely and the result is far more eflicient than if pulp would be produced by separate steps since cooking, beating, electrical and chemical processes all take place simultaneously and in united action more efiiciently and thoroughly accomplish their results than if they were acting singularly.
- a method for-preparing cellulose pulp from cellulose bearing material such as bagasse, straws, grasses, wood, cornstalk and the like, consisting in simultaneously cooking, beating and electrically and chemically treating the cellulose bearing material.
- a method for preparing cellulose pulp from cellulose bearing material such as bagasse, straws, grasses, wood, cornstalk, and the like, consisting in simultaneously cooking, beating and'electrically and chemically treating the cellulose bearing material, said cooking being accomplished by the introduction of steam into a digestor rotating and carrying the cellulose bearing material in water.
- a method for preparing cellulose pulp from cellulose bearing material such as bagasse, straws grasses, Wood, cornstalk, and the like, consisting in simultaneously cooking, beating and electrically and chemically treating the cellulose bearing material, said cooking being accomplished by the introduction of steam into a digestor rotating and carrying the cellulose bearing material in water, said beating being accomplished by loose rods within the digestor.
- a method for preparing cellulose pulp from cellulose bearing material such as bagasse, straws, grasses, wood, cornstalk and the like, consisting in simultaneously cooking, beating and electrically and chemically treating the cellulose bearing material, said cooking being accomplished by the introduction of steam into a digestor rotating and carrying the cellulose bearing material in water, said electrical and chemical treatment con. sists in passing a current thru said water to which sodium chloride has been previously added.
- a method for preparing cellulose pulp from cellulose bearing material such as bagasse, straws, grasses, wood, cornstalk and the like, consisting in simultaneously cooking, beating and electrically and chemically treating the cellulose bearing material, said cooking being accomplished by the introduction of steam into a digestor rotating and carrying the cellulose bearing material in water, said electrical and chemical treatment consists in passing a current thru said water to which sodium chloride has been previously added, and at a later soda ash.
- a method of preparing cellulose pulp from cellulose bearing material comprising simultaneous cooking, beating and electrically and chemically treating the material, said chemical treatment including the use of a softening agent.
Landscapes
- Paper (AREA)
Description
Patented Nov. 4, 1930 UNITED STATES PATENT OFFICE HARRY L. HORN, OF NEW YORK, N. Y., ASSIGNOR TO BAGASSE DEVELOPMENT INC., A CORPORATION OF NEW YORK METHOD OF PREPARING CELLULOSE PULP No Drawing.
This invention relates to new and useful improvements in'a method of preparing cellulose pulp from cellulose bearing material such as bagasse, straws, grasses, wood, cornstalk and the like.
The invention relates to similar subject matter as disclosed in my copending application, Serial Number 410,702, filed simultaneously with this application.
The invention proposes simultaneous cooking, beating and electrically and chemically treating bagasse, straws, grasses, wood, cornstalk and the like for forming a pulp capable of being used in well known manner for manufacturing paper, rayon, etc., and which besides distinguishing in the reduction of the cost of the pulp, differs in the production of a higher grade of pulp. It may be obvious that if various steps of a method could be performed simultaneous, that time will be saved, but the producing of a superior product or the possibility of simultaneously performing all of the steps without interference of the steps with each other could not preyiously be recognized, except by actual trymg.
Specific application of the instant invention will be given as it relates to bagasse which is typical of the various cellulose materials previously mentioned. It may be well to call attention that sugar cane is usually cut by a hand cutter a few inches above the ground, because the vegetation of the cane occurs in a junglelike field. After the sugar cane is cut, it is heaped and loaded in a cart and delivered to a factory. The upper part of the cane which forms the leaves and branches is removed and the cane proper is dumped into a crushing machine. The crushing machine has crushing rollers which squeeze out the juice which is used for preparing sugar. The remainder is the bagasse. Millions of tons of this bag-asse must be carried away from the sugar mills and destroyed by burning or otherwise.
Numerous attempts have been made to com mercially use the bagasse in the production of pulp for the manufacture of paper, rayon and the like, but have failed in that the cost was prohibitive or the product unsatisfactory.
Application filed December 2, 1929. Serial No. 411,219.
The present invention .utilizes this bagasse so that it is possible to refine it and make pulp of good quality cheaply and on a commercial basis.
The pulp produced may be used for making paper, rayon or the like, by methods which are well known. For example, one method is cited which consists in feeding the pulp as obtained from the crusher to a conveyor, drying out the moisture from the pulp by a suitable suction device beneath the conveyer and spreading the pulp into paper sheets after the removal of the moisture. It is necessary to refine the pulp before feeding it to the conveyer by various treatments and coloring to conform with particular requirements. The paper may be manufactured to be of different grades depending upon the quality or thickness of the fibres in the pulp which is of cottonlike texture.
The above method of making paper is conventional, but the particular transforming of the bagasse into pulp as follows, is new. The shredded bagasse as obtained from the crusher must first be washed for removing various impurities such as the remains of the juice dirt, sand and other foreign matter, and then must be fed into a container which is generally known as a digest or by means of a conveyer or thru a manhole. Water is supplied into the conveyer with the shredded bagasse preferably a sufficient amount to cover all of the latter element. A plurality of rods are loosely located in the bottom part of the digestor so that upon rotation these rods may move around and accomplish proper beating of the shredded bagasse.
These rods may be round or of any other suitable shape and may be formed with depressions, slots, grooves or the like.
Sodium chloride is added to the water in the digester and one terminal of an electric source is connected at one end of the digestor and the other terminal to the other end. The current is then passed thru the liquid in the. digestor and electrolytical and chemical action takes place forming sodium hydroxide and chlorine, and siml'lltaneously the digestor is rotated by mechanical means for about two hours. This treatment constitutes a powerful softening agent for the shredded bagasse. It is advisable that 10 pounds of sodium chloride be added to 100 pounds of shredded bagasse in 100 gallons of Water;
After two hours of rotation, the digestor is stopped and lime and soda ash is added. Then the digestor is again rotated and simultaneously steam is supplied within it at a pressure of from thirty to fifty pounds. The digestor is now allowed to rotate for a period of from one to two hours. During this period, the steam cooks the contents of the digestor and adds to the softening of the bagasse. Preferably the digestor should rotate at eighteen revolutions per minute. When the machine is stopped, the material is dumped into a container and the juice or water drains off. The resultant matter is the pulp which is to be used in the preparation of paper, rayon and the like by any conventional method. The
juice or water may be used for the recovery of by-products such as fertilizers, etc.
The invention method eliminates the necessity of many operations. It eliminates the beating of the pulp either partially or completely and the result is far more eflicient than if pulp would be produced by separate steps since cooking, beating, electrical and chemical processes all take place simultaneously and in united action more efiiciently and thoroughly accomplish their results than if they were acting singularly.
While I have described my invention with some degree of particularity, I realize that in practice various alterations therein may be made. I therefore reserve the right and privilege of changing the form of the details or otherwise altering the arrangement of the correlated sparts without departing from the spirit or the scope of the appended claims.
Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is 1. A method for-preparing cellulose pulp from cellulose bearing material such as bagasse, straws, grasses, wood, cornstalk and the like, consisting in simultaneously cooking, beating and electrically and chemically treating the cellulose bearing material.
2. A method for preparing cellulose pulp from cellulose bearing material such as bagasse, straws, grasses, wood, cornstalk, and the like, consisting in simultaneously cooking, beating and'electrically and chemically treating the cellulose bearing material, said cooking being accomplished by the introduction of steam into a digestor rotating and carrying the cellulose bearing material in water.
3. A method for preparing cellulose pulp from cellulose bearing material such as bagasse, straws grasses, Wood, cornstalk, and the like, consisting in simultaneously cooking, beating and electrically and chemically treating the cellulose bearing material, said cooking being accomplished by the introduction of steam into a digestor rotating and carrying the cellulose bearing material in water, said beating being accomplished by loose rods within the digestor.
4. A method for preparing cellulose pulp from cellulose bearing material such as bagasse, straws, grasses, wood, cornstalk and the like, consisting in simultaneously cooking, beating and electrically and chemically treating the cellulose bearing material, said cooking being accomplished by the introduction of steam into a digestor rotating and carrying the cellulose bearing material in water, said electrical and chemical treatment con. sists in passing a current thru said water to which sodium chloride has been previously added.
5. A method for preparing cellulose pulp from cellulose bearing material such as bagasse, straws, grasses, wood, cornstalk and the like, consisting in simultaneously cooking, beating and electrically and chemically treating the cellulose bearing material, said cooking being accomplished by the introduction of steam into a digestor rotating and carrying the cellulose bearing material in water, said electrical and chemical treatment consists in passing a current thru said water to which sodium chloride has been previously added, and at a later soda ash.
6. A method of preparing cellulose pulp from cellulose bearing material, comprising simultaneous cooking, beating and electrically and chemically treating the material, said chemical treatment including the use of a softening agent.
In testimony whereof I have aflixed my sig nature.
HARRY L. HORN.
period adding lime and-
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US411219A US1780750A (en) | 1929-12-02 | 1929-12-02 | Method of preparing cellulose pulp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US411219A US1780750A (en) | 1929-12-02 | 1929-12-02 | Method of preparing cellulose pulp |
Publications (1)
Publication Number | Publication Date |
---|---|
US1780750A true US1780750A (en) | 1930-11-04 |
Family
ID=23628067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US411219A Expired - Lifetime US1780750A (en) | 1929-12-02 | 1929-12-02 | Method of preparing cellulose pulp |
Country Status (1)
Country | Link |
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US (1) | US1780750A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4075071A (en) * | 1977-06-16 | 1978-02-21 | Kirschbaum Robert N | Method for the treatment of essential oils and wood particles containing essential oils |
US4341609A (en) * | 1981-02-26 | 1982-07-27 | The Standard Oil Company | Electrochemical conversion of biomass |
US4622101A (en) * | 1984-10-01 | 1986-11-11 | International Paper Company | Method of oxygen bleaching with ferricyanide lignocellulosic material |
US4622100A (en) * | 1984-10-01 | 1986-11-11 | International Paper Company | Process for the delignification of lignocellulosic material with oxygen, ferricyanide, and a protector |
-
1929
- 1929-12-02 US US411219A patent/US1780750A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4075071A (en) * | 1977-06-16 | 1978-02-21 | Kirschbaum Robert N | Method for the treatment of essential oils and wood particles containing essential oils |
US4341609A (en) * | 1981-02-26 | 1982-07-27 | The Standard Oil Company | Electrochemical conversion of biomass |
US4622101A (en) * | 1984-10-01 | 1986-11-11 | International Paper Company | Method of oxygen bleaching with ferricyanide lignocellulosic material |
US4622100A (en) * | 1984-10-01 | 1986-11-11 | International Paper Company | Process for the delignification of lignocellulosic material with oxygen, ferricyanide, and a protector |
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