US150698A - Improvement in processes for making parchment-paper - Google Patents
Improvement in processes for making parchment-paper Download PDFInfo
- Publication number
- US150698A US150698A US150698DA US150698A US 150698 A US150698 A US 150698A US 150698D A US150698D A US 150698DA US 150698 A US150698 A US 150698A
- Authority
- US
- United States
- Prior art keywords
- paper
- bath
- parchment
- acid
- processes
- 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
- 239000011088 parchment paper Substances 0.000 title description 10
- 239000000123 paper Substances 0.000 description 20
- 239000002253 acid Substances 0.000 description 16
- 235000002639 sodium chloride Nutrition 0.000 description 14
- 239000011780 sodium chloride Substances 0.000 description 14
- 150000003839 salts Chemical class 0.000 description 10
- 239000012266 salt solution Substances 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000001117 sulphuric acid Substances 0.000 description 6
- 235000011149 sulphuric acid Nutrition 0.000 description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- XTEGARKTQYYJKE-UHFFFAOYSA-M chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000005591 charge neutralization Effects 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 230000001264 neutralization Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H5/00—Special paper or cardboard not otherwise provided for
- D21H5/08—Vegetable parchment
Definitions
- This invention relates to that class of processes employed in the treatment of sized or unsized paper in the manufacture of the article known as parchment-paper; and it consists, first, in the joint use of certain ingredients entering into the composition of what is known as the acid-bath or first step of the process.
- the acid is added gradually to the salt solution, and the mixture allowed to stand until about the temperature of the. surrounding atmosphere.
- the specific gravity of the solution thus formed is about 1.650, more or less, provided the salt solution used is 1.100.
- the sheet of sized or unsized paper is passed, and allowed to remain until such time as a complete change of the paper takes place-th at is, until it has the clear even transparent appearance common to parchment after which it is removed from the acid-bath.
- the superfluous acid may then be removed, either by scraping or rollers, .or in any other suitable manner.
- the sheet is then passed to the water-bath to wash out any free acid that may remain.
- the sheet or sheets thus treated, are then passed into an alkaline bath, which may be composed of carbonate of soda, potash, caustic soda, ammonia, or any alkali that will complete the neutralization of the acid.
- blotting-paper should be left for a greater length of time, or until the change above mentioned is completed. I find that in treating blotting-paper a temperature of from 45 to 50 Fahrenheit is preferable. Salt in its dry state may be used, and the desired effect obtained, but the bath is thicker and not so manageable.
Landscapes
- Paper (AREA)
Description
UNITED STATES EDWARD METZGER, OF PITTSBURG, PENNSYLVANIA.
IMPROVEMENT IN PROCESSES FOR MAKING PARCHMENT-PAPER.
Specification forming part of Letters Patent N0. 150,698, dated May 12, 1874; application filtd March 28, 1874.
To all whom it may concern:
Be it known that I, EDWARD METZGER, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Method of Making Parchment-Paper; and I do hereby declare the following to be a full, clear, and exact description thereof.
This invention relates to that class of processes employed in the treatment of sized or unsized paper in the manufacture of the article known as parchment-paper; and it consists, first, in the joint use of certain ingredients entering into the composition of what is known as the acid-bath or first step of the process.
In preparing the acid-bath according to the first part of my invention, I take of the on dinary commercial sulphuric acid and of a solution of common salt or chloride of sodium, in the proportions of one and one-half of the saline solution to four parts of acidthat is to say, four ounces of sulphuric acid and an ounce and a half of the salt solution. The acid is added gradually to the salt solution, and the mixture allowed to stand until about the temperature of the. surrounding atmosphere. The specific gravity of the solution thus formed is about 1.650, more or less, provided the salt solution used is 1.100. Into this bath the sheet of sized or unsized paper is passed, and allowed to remain until such time as a complete change of the paper takes place-th at is, until it has the clear even transparent appearance common to parchment after which it is removed from the acid-bath. The superfluous acid may then be removed, either by scraping or rollers, .or in any other suitable manner. The sheet is then passed to the water-bath to wash out any free acid that may remain. The sheet or sheets thus treated, are then passed into an alkaline bath, which may be composed of carbonate of soda, potash, caustic soda, ammonia, or any alkali that will complete the neutralization of the acid.
The paper, when removed from this alkaline bath, is again submitted to a water-bath fo the removal of any alkali.
The different kinds of paper will require different lengths of treatment. For instance,
paper such as blotting-paper should be left for a greater length of time, or until the change above mentioned is completed. I find that in treating blotting-paper a temperature of from 45 to 50 Fahrenheit is preferable. Salt in its dry state may be used, and the desired effect obtained, but the bath is thicker and not so manageable.
All acid-baths heretofore employed work irregularly, and are only effective under certain conditions, which cannot be insured; but the bath made by my process is constant, and the results regular, the paper produced uniform, and waste avoided.
I am well aware that sulphuric acid is commonl y employed in the manufacture of parchmentpaper, and that various salts have been used in such baths, and lay no clai-n thereto. The object to be attained by me is to obtain a regular, constant, and uniform working bath, which is believed to be attained by my process, and to be due to the following causes: The addition of the salt solution to the acid causes the formation of an acid salt in the bath, which is probably a double salt of the sulphate and chlorate of soda. acting as a carrier yields back to the bath a portion of the acid upon each introduction of paper, so that the bath is maintained uniform in character and operation, working steadily until completely exhausted, the last sheet coming from the bath being equally perfect with the first submitted, and the exhausted bath containing simply dregs-mainly sulphate of soda.
Having thus described my l1lV6l1tlOl1,Wli at I claim, and desire to secure by Letters Patent,
This acid salt"
Publications (1)
Publication Number | Publication Date |
---|---|
US150698A true US150698A (en) | 1874-05-12 |
Family
ID=2220111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US150698D Expired - Lifetime US150698A (en) | Improvement in processes for making parchment-paper |
Country Status (1)
Country | Link |
---|---|
US (1) | US150698A (en) |
-
0
- US US150698D patent/US150698A/en not_active Expired - Lifetime
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