US2353243A - Method of making cellulose powder - Google Patents
Method of making cellulose powder Download PDFInfo
- Publication number
- US2353243A US2353243A US398675A US39867541A US2353243A US 2353243 A US2353243 A US 2353243A US 398675 A US398675 A US 398675A US 39867541 A US39867541 A US 39867541A US 2353243 A US2353243 A US 2353243A
- Authority
- US
- United States
- Prior art keywords
- cellulose
- fibers
- powder
- cellulose powder
- making cellulose
- 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
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title description 7
- 238000004519 manufacturing process Methods 0.000 title description 7
- 239000000463 material Substances 0.000 description 15
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 14
- 229960002645 boric acid Drugs 0.000 description 14
- 235000010338 boric acid Nutrition 0.000 description 14
- 239000000835 fiber Substances 0.000 description 13
- 239000000843 powder Substances 0.000 description 12
- 229920002678 cellulose Polymers 0.000 description 10
- 239000001913 cellulose Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 8
- 229920003043 Cellulose fiber Polymers 0.000 description 6
- 239000004327 boric acid Substances 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 238000000227 grinding Methods 0.000 description 5
- 230000002421 anti-septic effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009877 rendering Methods 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 2
- 230000001476 alcoholic effect Effects 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XDVOLDOITVSJGL-UHFFFAOYSA-N 3,7-dihydroxy-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound O1B(O)OB2OB(O)OB1O2 XDVOLDOITVSJGL-UHFFFAOYSA-N 0.000 description 1
- 240000008564 Boehmeria nivea Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000003049 inorganic solvent Substances 0.000 description 1
- 229910001867 inorganic solvent Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- VGTPKLINSHNZRD-UHFFFAOYSA-N oxoborinic acid Chemical compound OB=O VGTPKLINSHNZRD-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
Definitions
- the present invention relates to cellulose powder and the method of making same. More specifically the invention relates to the kind of powder and the method of making same from fibrous, cellulose material covered by my copending application, Serial No. 341,678, filed June 21, 1940, and assigned to the same assignee as the present application.
- cellulose fibers may be readily ground or pulverized to a fine powder upon first rendering the fibers brittle by steeping them in certain solutions and subsequently drying the steeped fibers or fibrous, cellulose material.
- One object of my invention is to provide an improved, cellulose powder adapted for general use and particularly suitable as an absorptive and antiseptic material.
- Another object of my invention is to provide an improved method of making cellulose powder, which method may be carried out economically and efficiently.
- the orthoboric acid contained in the steeped fibers is transformed into meta and tetraboric acids as the fibers are dried at temperatures of about 80 to 140 C.
- the meta and tetraboric acids may form coatings on the fibers or fill pores or intermolecular spaces therein and thus render the fibers brittle, though it is diflicult to understood that the relatively small amount of boric acid necessary to render the cellulose fibers brittle should be suificient to produce such coatings or fill the pores on the relatively large surfaces of the fibers.
- brittleness is caused by the formation of compounds of boric acid with the fibrous cellulose which may be in the form of a chemical compound due to a reaction between the free hydroxyl groups of cellulose with boric acid.
- Such compound may also be in the form of an absorption compound similar to that of alkali cellulose.
- the orthoboric acid may be regained by a washing process, subjecting the powder to water or any suitable organic or inorganic solvent such as alcohol. During the washing process the meta and tetraboric acid are converted into orthoboric acid.
- the boric acid contained in the powder upon grinding of the brittle cellulose fibers may be retained therein as it will not subsequently chemically act on the cellulose powder. In many instances, especially when the powder is to be used as an absorptive, antiseptic material, it is advantageous to retain the boric acid in the powder.
- Example Ramie, cotton linters, wood pulp, cornstalk fibers, rayon waste or like cellulose material are placed into an aqueous or an alcoholic bath of from 2 to 12% orthoboric acid and subjected to such solution for about /2 hour at room temperature.
- the fibers are then removed from the bath and dried .at a temperature of from to C. and thereafter ground in a pebble mill.
- Method of making a highly absorptive antiseptic powder comprising the steps of steeping fibrous cellulose material in a solution of orthoboric acid, drying the steeped material at a temperature of between 80 and 140 C. and grinding the dried material.
- Method of making cellulose powder comprising the steps of steeping fibrous cellulose material in a solution of orthoboric acid, drying the steeped material at a temperature between 80 and 140 C., grinding the dried material, and removing the boric acid from the ground material.
- Method of making a highly absorptive antiseptic powder comprising the steps of subjecting fibrous cellulose material to an aqueous solution of from 2% to 12% orthoboric acid for about /2 hour at room temperature, removing the material from the solution and drying it at a temperature of between 80 and 140 C., and pulverizing the dried material.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Description
Patented July 11, 1944 UNITED STATES PATENT OFFICE Julius Kent, New York, N. Y., assignor to Kent Chemical Corporation, a corporation of Delaware No Drawing. Application June 18, 1941, Serial No. 398,675
3 Claims.
The present invention relates to cellulose powder and the method of making same. More specifically the invention relates to the kind of powder and the method of making same from fibrous, cellulose material covered by my copending application, Serial No. 341,678, filed June 21, 1940, and assigned to the same assignee as the present application. As disclosed in said ap plication, cellulose fibers may be readily ground or pulverized to a fine powder upon first rendering the fibers brittle by steeping them in certain solutions and subsequently drying the steeped fibers or fibrous, cellulose material.
One object of my invention is to provide an improved, cellulose powder adapted for general use and particularly suitable as an absorptive and antiseptic material.
Another object of my invention is to provide an improved method of making cellulose powder, which method may be carried out economically and efficiently.
This is accomplished in accordance with my invention by the process of rendering cellulose fibers brittle by steeping them in an aqueous, alcoholic or like solution of o-rthoboric acid for a period of time suificient to cause penetration of the fibers and thereafter drying the steeped fibers.
I have found that the use of orthoboric acid solutions in the process of rendering cellulose fibers brittle permits wide variations in the strength of the solutions without materially affecting the degree of brittleness and the quality of the powder produced by grinding the brittle fibers. Due to the small size of the particles the powder has a lower viscosity than the original cellulose fibers. Otherwise the powder has retained substantially all physical and chemical properties of the original cellulose, such as its content of alpha cellulose, its copper figure, etc.
According to my theory, the orthoboric acid contained in the steeped fibers is transformed into meta and tetraboric acids as the fibers are dried at temperatures of about 80 to 140 C. The meta and tetraboric acids may form coatings on the fibers or fill pores or intermolecular spaces therein and thus render the fibers brittle, though it is diflicult to understood that the relatively small amount of boric acid necessary to render the cellulose fibers brittle should be suificient to produce such coatings or fill the pores on the relatively large surfaces of the fibers. It appears more plausible that the brittleness is caused by the formation of compounds of boric acid with the fibrous cellulose which may be in the form of a chemical compound due to a reaction between the free hydroxyl groups of cellulose with boric acid. Such compound may also be in the form of an absorption compound similar to that of alkali cellulose.
After the fibers are pulverized to a fine powder in a pebble mill or like grinding or comminuting apparatus the orthoboric acid may be regained by a washing process, subjecting the powder to water or any suitable organic or inorganic solvent such as alcohol. During the washing process the meta and tetraboric acid are converted into orthoboric acid. The boric acid contained in the powder upon grinding of the brittle cellulose fibers may be retained therein as it will not subsequently chemically act on the cellulose powder. In many instances, especially when the powder is to be used as an absorptive, antiseptic material, it is advantageous to retain the boric acid in the powder.
Example Ramie, cotton linters, wood pulp, cornstalk fibers, rayon waste or like cellulose material are placed into an aqueous or an alcoholic bath of from 2 to 12% orthoboric acid and subjected to such solution for about /2 hour at room temperature. The fibers are then removed from the bath and dried .at a temperature of from to C. and thereafter ground in a pebble mill.
What I claim as new and desire to secure by Letters Patent of the United States, is:
1. Method of making a highly absorptive antiseptic powder comprising the steps of steeping fibrous cellulose material in a solution of orthoboric acid, drying the steeped material at a temperature of between 80 and 140 C. and grinding the dried material.
2. Method of making cellulose powder comprising the steps of steeping fibrous cellulose material in a solution of orthoboric acid, drying the steeped material at a temperature between 80 and 140 C., grinding the dried material, and removing the boric acid from the ground material.
3. Method of making a highly absorptive antiseptic powder comprising the steps of subjecting fibrous cellulose material to an aqueous solution of from 2% to 12% orthoboric acid for about /2 hour at room temperature, removing the material from the solution and drying it at a temperature of between 80 and 140 C., and pulverizing the dried material.
JULIUS KENT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US398675A US2353243A (en) | 1941-06-18 | 1941-06-18 | Method of making cellulose powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US398675A US2353243A (en) | 1941-06-18 | 1941-06-18 | Method of making cellulose powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2353243A true US2353243A (en) | 1944-07-11 |
Family
ID=23576329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US398675A Expired - Lifetime US2353243A (en) | 1941-06-18 | 1941-06-18 | Method of making cellulose powder |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2353243A (en) |
-
1941
- 1941-06-18 US US398675A patent/US2353243A/en not_active Expired - Lifetime
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