US56833A - Improvement in bleaching paper-stock - Google Patents
Improvement in bleaching paper-stock Download PDFInfo
- Publication number
- US56833A US56833A US56833DA US56833A US 56833 A US56833 A US 56833A US 56833D A US56833D A US 56833DA US 56833 A US56833 A US 56833A
- Authority
- US
- United States
- Prior art keywords
- stock
- improvement
- bleaching
- paper
- bleaching paper
- 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
- 238000004061 bleaching Methods 0.000 title description 16
- KZBUYRJDOAKODT-UHFFFAOYSA-N chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 229910052801 chlorine Inorganic materials 0.000 description 6
- 239000000460 chlorine Substances 0.000 description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 6
- 238000009835 boiling Methods 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- 239000000126 substance 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
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
Definitions
- Our improved process consists in taking paper-stock, after it has been boiled in a caustic alkaline solution, and has been washed and made ready for the process of bleaching by the methods well known to manufacturers of paper from straw and other fibrous substances, and saturating the same thoroughly with a solution of chlorine.
- the object of the pressure is to bring the chlorine in contact with every part of the stock, so that the process of bleaching may be completed within one-half of the time ordinarily required for that purpose.
- the chlorine gas is forced into the close vessel by means of a force-pumpa means Well known to the public.
- the process of bleaching paper-stock under pressure produced by forcing a weak chlorine gas, withor without atmospheric air, into a close vessel contain the stock, in combination with the. use t solution of chlorine, with which the stock to be bleached is saturated, substantially in the manner and for the purposes herein described.
Description
UNITED vSTATES PATENT OFFICE.
JOEL 'IIEFANY, OF ALBANY, AND HARRISON B. MEEOH, OF FORT EDWARD,
' NEW YORK..
IMPROVEMENT IN BLEACHING PAPER-STOCK.
Specification forming part of Letters Patent No. 56,833, dated July 31, 1866.
To all whom it may cohcem:
Be it known that we, JOEL TIFFANY, of
the city of Albany and State of New York,
7 cess of Bleaching Paper-Stock for the Manufacture of White Paper; and we do hereby declare the following to be a full and exact description of the same. A
Our improved process consists in taking paper-stock, after it has been boiled in a caustic alkaline solution, and has been washed and made ready for the process of bleaching by the methods well known to manufacturers of paper from straw and other fibrous substances, and saturating the same thoroughly with a solution of chlorine. We place the same in a close vessel. We then close the Vessel airtight, and force into the same a diluted chlorine gas, which may or may not be mixed with atmospheric air, as is most convenient, until an internal pressure of thirtypounds to the square inch, or upward, is obtained. The object of the pressure is to bring the chlorine in contact with every part of the stock, so that the process of bleaching may be completed within one-half of the time ordinarily required for that purpose. The chlorine gas is forced into the close vessel by means of a force-pumpa means Well known to the public.
We do not claim the bleaching of paperstock by the use of chlorine gas or the bleach ing, of such stock under pressure merely; but
What we do claim, and seek to secure by Letters Patent, is-
The process of bleaching paper-stock under pressure produced by forcing a weak chlorine gas, withor without atmospheric air, into a close vessel contain the stock, in combination with the. use t solution of chlorine, with which the stock to be bleached is saturated, substantially in the manner and for the purposes herein described.
JOEL TIFFANY. H. B. MEEGH.
Witnesses:
J 0s. F. WINNE, EDWARD WADE.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US56833A true US56833A (en) | 1866-07-31 |
Family
ID=2126373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US56833D Expired - Lifetime US56833A (en) | Improvement in bleaching paper-stock |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US56833A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0207062A1 (en) * | 1985-06-14 | 1986-12-30 | Kamyr, Inc. | Pressurized pulp chlorination, and chlorine introduction in minute bubbles |
-
0
- US US56833D patent/US56833A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0207062A1 (en) * | 1985-06-14 | 1986-12-30 | Kamyr, Inc. | Pressurized pulp chlorination, and chlorine introduction in minute bubbles |
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