US96239A - Improved process of reducing wood and woody fibres for paper-pulp - Google Patents
Improved process of reducing wood and woody fibres for paper-pulp Download PDFInfo
- Publication number
- US96239A US96239A US96239DA US96239A US 96239 A US96239 A US 96239A US 96239D A US96239D A US 96239DA US 96239 A US96239 A US 96239A
- Authority
- US
- United States
- Prior art keywords
- pulp
- paper
- improved process
- woody
- fibres
- 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
- 238000000034 method Methods 0.000 title description 14
- 239000002023 wood Substances 0.000 title description 10
- 229920001131 Pulp (paper) Polymers 0.000 title description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000003513 alkali Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 239000007844 bleaching agent Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 239000011122 softwood Substances 0.000 description 2
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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
- D21C9/083—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with inorganic compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/02—Chip soaking
Description
diluted States tenant can.
Letters Patent N 96,239, dated October 26, 1869; a'ntedaterl October 20, 1869.
IMPROVED PROCESS or REDUCING- woo'n AND WOODY means FOR PAPER-PULP.
The Schedule referred to in these Letters Patent and making part of the same.
To all whom it may concern:
Be it known thatl, VINCENT E. KEEG-AN,1V[. D., of *Koston lziighlands, in the county ofSufiolk, in the State of Massachusetts, have invented a new and improved Process for Reducing Wood and Woody Fibres; and, I do hereby declare that the following is a. full and exact description thereof.
The nature of my invention consists in a peculiar inanncroi' reducing wood and woody fibres-with alkalies, whereby I produce an immediate and complete action,
To enable others skilled in the art to use my in.-
' veutiou, I will proceed to describe the process.
I first reduce the wood to blocks, chips, or crushed shreds of about one-half an inch in thickness, and' three or four inches long, whichis a very practical size. Larger pieces may he used, even boards, provided that they are all bf the same size, nearly. I then boil these chips in a caustic alkaline solution of about 2.5 gravity, although a weaker or stronger solution may be used, according to the time that may be desired to reduce them in. Having boiled them for about thirty minutes briskly, and if they are completely saturated, I drain off the supernatantliquor, and place the saturated chips into a boiler, that must then be made steam-tight, pertcctlyso, and to'revolve upon its horizontal arms, (to prevent the liquor pressed out oi the chips by the stomp-pressure from settliug,) in a chamber heated to 325, and in two hours the reduction will be completed. Some arrangement will be required on the boiler to enable the operator to test the condition of the contents, so that the exact time will be known when the chips are done, and I propose the construction of a valve upon the inside of the boiler, to act automatically, and connected with acyliiuler-piston on the outside, provided with a cup on the end that reaches the boiler; then, by forcing this piston into the boiler through the valve-opening,-and dipping out with the cup a few of the chips, their condi tion can be tested, and a-t't-eranumber of practical operations, the strength of the alkali used, degree of heat, time by testing, &-o., being all noted, then the further use of the test cylinder-piston will be unnecessary.
When the chips are so reduced that they make a perfect oottony pulp by adding a little water,-they must be taken out of the boiler, and washed thoroughly from the alkali'by boiling in water, and then washed pure and quitewhite with hot steam, in such a manner that great suction will be produced in a mass of the pulp, so that the coloring-matter contained in the tubes of the fibres will be drawn out, leaving thenr almost pure white, and requiring but asmall amount of bleaching-agent to bleach them afterward.
I now, previous to bleaching the pulp, boil it for one quarterv of an hour in water acidulatcd with hydrochlozic acid, using one pound of acid to four gallons of water, and then strain it, and nowbleach it by any process; but to use first, chlorine-gas, and then chloride of lime, will be found most economical. Itcan then be made into paper of the nicest quality.
I prefer the soft woods to the hard woods, for their fibremakes a superior paper to any other.
\Vlrat I claim, and desire'to secure by Letters Patent, is-
The process for reducing wood and woody fibres, for the manufaotme of paper-pulp, wit-h alkalics, in the manner of the process as described, or its substantial equivalent.
VINCENT E. KEEGAN, M. D.
Witnesses:
Anna T. Knnoas, H. P. Knncsx.
Publications (1)
Publication Number | Publication Date |
---|---|
US96239A true US96239A (en) | 1869-10-26 |
Family
ID=2165706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US96239D Expired - Lifetime US96239A (en) | Improved process of reducing wood and woody fibres for paper-pulp |
Country Status (1)
Country | Link |
---|---|
US (1) | US96239A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2599572A (en) * | 1946-02-01 | 1952-06-10 | Watervliet Paper Company | Alkaline pulping of preimpregnated deciduous wood |
-
0
- US US96239D patent/US96239A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2599572A (en) * | 1946-02-01 | 1952-06-10 | Watervliet Paper Company | Alkaline pulping of preimpregnated deciduous wood |
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