US51572A - Improved process for making paper-pulp - Google Patents
Improved process for making paper-pulp Download PDFInfo
- Publication number
- US51572A US51572A US51572DA US51572A US 51572 A US51572 A US 51572A US 51572D A US51572D A US 51572DA US 51572 A US51572 A US 51572A
- Authority
- US
- United States
- Prior art keywords
- pulp
- making paper
- improved process
- solution
- digester
- 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 12
- 229920001131 Pulp (paper) Polymers 0.000 title description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 12
- 239000002023 wood Substances 0.000 description 10
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 8
- 239000010902 straw Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 235000013311 vegetables Nutrition 0.000 description 6
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 240000006394 Sorghum bicolor Species 0.000 description 2
- 235000011684 Sorghum saccharatum Nutrition 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000006193 liquid solution Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
Definitions
- Heat may be communicated by acoilof steam or hot-water pipes in the bottom of the digester, or any other convenient mode.
- the heat of the liquid solution in the digester may be varied from 300 to 400 Fahrenheit, according to the nature of the substance to be treated, the length of time under treatment,
Description
UNITED STATES PATENT OFFIc.
JOHN W. DIXON, OF PHILADELPHIA, PENNSYLVANIA.
IMPROVED PROCESS FOR MAKING PAPER-PULP.
Specification forming part of Letters Patent No. 51,572, dated December 19, 1865.
To all whom it may concern:
Be it known that I, JOHN W. DIXON, of the city of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in the Process of Making Paper-Pulp from wood, straw, cornstalks, and other vegetable fibrous substance; and I do hereby declare the following to be a full and exact description of the same.
I cut the wood, straw, cornsta'lks, 850., into short lengths by any convenient cutting-machine. The cuttings are then placed in a strong closed boiler or digester and submitted to the action of a solution of caustic lime, or unslaked lime of commerce. Boiling in this solution of caustic lime under pressure is of essen tial importance. By the words under pressure is meant a pressure at, near, or above 300 of Fahrenheits scale, which is as low as is advisable to work the process. WVith wood I find a solution of 4 Baum, at a pressure of one hundred and twenty-five pounds, and the corresponding temperature theretosa-y will complete the pulping operation in from ten to twelve hours. A less strength of solution at this temperaturesay from 1 to 3 of Baum-will answer with straw, cornstalks, or sorghum, and I indicate these temperatures and strengths respectively in a good digesting apparatus, such as is hereinafter described. I prefer, also, to perform the digesting operation under pressure in the peculiar apparatus for which I have applied for a patent, in which the boiling-liquid under pressure containing the. caustic lime is made to circulate from the bottom to the top of the digester and through the mass to be pulped within the digester, by means of a pump.
Heat may be communicated by acoilof steam or hot-water pipes in the bottom of the digester, or any other convenient mode.
After the material has been thus treated it is to be washed in the usual way, and bleached with chlorine or chloride of lime in the usual way.
I do not desire to limit myself to the above degrees of temperature for treating the material, nor the above strength of solution, nor to any special form of pulp-digesting apparatus. The heat of the liquid solution in the digester may be varied from 300 to 400 Fahrenheit, according to the nature of the substance to be treated, the length of time under treatment,
and the form of digesting apparatus adopted.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is
The process of treating wood or other vegetable substances by boiling in a solution of caustic lime under pressure as a process, or preparatory process, for making pulp for the manufacture of paper from wood, straw, or other vegetable substances, substantially as described.
JOHN W. DIXON.
Witnesses:
J. ROBERTS HOWELL, Gno. BUGKLEY.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US51572A true US51572A (en) | 1865-12-19 |
Family
ID=2121121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US51572D Expired - Lifetime US51572A (en) | Improved process for making paper-pulp |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US51572A (en) |
-
0
- US US51572D patent/US51572A/en not_active Expired - Lifetime
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