US504014A - Art of tawing skins - Google Patents
Art of tawing skins Download PDFInfo
- Publication number
- US504014A US504014A US504014DA US504014A US 504014 A US504014 A US 504014A US 504014D A US504014D A US 504014DA US 504014 A US504014 A US 504014A
- Authority
- US
- United States
- Prior art keywords
- skins
- hides
- tawing
- art
- bath
- 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
- 210000003491 Skin Anatomy 0.000 title description 44
- 238000000034 method Methods 0.000 description 16
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 12
- 239000011780 sodium chloride Substances 0.000 description 10
- 235000002639 sodium chloride Nutrition 0.000 description 10
- 239000010985 leather Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- OIDPCXKPHYRNKH-UHFFFAOYSA-J Chrome alum Chemical compound [K]OS(=O)(=O)O[Cr]1OS(=O)(=O)O1 OIDPCXKPHYRNKH-UHFFFAOYSA-J 0.000 description 6
- SQQMAOCOWKFBNP-UHFFFAOYSA-L Manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 6
- NWONKYPBYAMBJT-UHFFFAOYSA-L Zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 6
- 235000007079 manganese sulphate Nutrition 0.000 description 6
- 239000011702 manganese sulphate Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- WGLPBDUCMAPZCE-UHFFFAOYSA-N trioxochromium Chemical class O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 6
- 150000003751 zinc Chemical class 0.000 description 6
- 235000009529 zinc sulphate Nutrition 0.000 description 6
- 239000011686 zinc sulphate Substances 0.000 description 6
- KRVSOGSZCMJSLX-UHFFFAOYSA-L Chromic acid Chemical compound O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 239000011591 potassium Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- GLFNIEUTAYBVOC-UHFFFAOYSA-L MANGANESE CHLORIDE Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 description 2
- 241001272996 Polyphylla fullo Species 0.000 description 2
- DPLVEEXVKBWGHE-UHFFFAOYSA-N Potassium sulfide Chemical compound [S-2].[K+].[K+] DPLVEEXVKBWGHE-UHFFFAOYSA-N 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N Sodium sulfide Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxyl anion Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 150000002696 manganese Chemical class 0.000 description 2
- 235000002867 manganese chloride Nutrition 0.000 description 2
- 239000011565 manganese chloride Substances 0.000 description 2
- 229940099607 manganese chloride Drugs 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/04—Mineral tanning
- C14C3/06—Mineral tanning using chromium compounds
Definitions
- My present invention has reference to a novel process in the art of tawing skins or hides for the purpose of making kid or other leather, and the process consists essentially in the treatment of the skins or hides with certain novel chemical compositions consisting of chromic oxide salts and a zinc salt, to which is added manganese sulphate, and to the action of which the skins or hides are exposed, whereby the leather is rendered waterproof, soft and flexible, and by the employment of which much time and labor are saved.
- the temperature of the bath or baths thus prepared is maintained at a uniform temperature of say about 85 Fahrenheit, and the method of procedure of tawing the hides or skins and an exact description of the bath used, is as follows: The required quantities of chrome alum, zinc sulphate, sulphate of manganese and sodium chloride are dissolved in hot water, to which is then added enough water to cover the skins or hides which are then placed in this bath.
- Sulphide of potassium which has been previously dissolved in as little water as possible is then added, and after the skins or hides have remained in this bath a sufficient length of time, which is about eight hours, the skins or hides are taken out and drained, and surplus water is pressed out, after which they, are finished in the usual manner.
- the metallic salts baths may be divided into several baths, prefing about eight hours, more or less, according to the thickness of the skins or hides to be tawed.
- the liquor in which the skins are placed may be analyzed after the removal of the skins and again brought to the proper concentration required, when it can be used for the treatment of a second batch of skins or hides to be tawed.
- Leather made in this manner will be perfectly waterproof, elastic and strong. The duration of the process is short and can be used for skins or hides of every description.
- the exact proportions of the several ingredients employed in my process of tanning hides or skins may be varied, without departingfrom the scope of mypresentinvention.
Description
UNITED STATES WILLIAM ZAHN, OF NEWARK, NEW JERSEY.
ART OF TAWING SKINS.
SPECIFICATION forming part of Letters Patent No. 504,014, dated August 29, 1893.
Application filed January 3, 1893. $erial No. 457,140. (No specimens.)
To all whom it may concern:
Be it knownthat I, WILLIAM ZAHN, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in the Art of Tawing Skins or Hides; and I do hereby declare the following to be a full, clear, and exact description of the nvention, such as will enable others skilled in the art to which it appertains to make and use the same.
My present invention has reference to a novel process in the art of tawing skins or hides for the purpose of making kid or other leather, and the process consists essentially in the treatment of the skins or hides with certain novel chemical compositions consisting of chromic oxide salts and a zinc salt, to which is added manganese sulphate, and to the action of which the skins or hides are exposed, whereby the leather is rendered waterproof, soft and flexible, and by the employment of which much time and labor are saved. 1 have found by careful experiments, that chromic oxide salts used in combination with a zinc salt and a sulphide of an alkali or any other alkali produces a very good result, and the skins or hides thus treated will produce a soft and elastic and a marketable leather.
The chemical reaction which takes place when using the chemical compositions herein above mentioned, during the process of tawing the skins or hides is similar to that described in my previous application herein above mentioned, in that the chromic oxide is partly precipitated as hydroxide and the zinc salt and the manganese salt precipitated as sulphides which are taken up by the skins or hides and firmly unite with the fiber of the same.
The following proportions are used in the herein described process for tawing the hides or skins: For one thousand pounds of prepared hides or skins, I prefer to use fifty pounds chrome alum, thirty pounds zinc sulphate, six pounds manganese sulphate, ten pounds sodium chloride and ten pounds of potassium sulphide. The temperature of the bath or baths thus prepared is maintained at a uniform temperature of say about 85 Fahrenheit, and the method of procedure of tawing the hides or skins and an exact description of the bath used, is as follows: The required quantities of chrome alum, zinc sulphate, sulphate of manganese and sodium chloride are dissolved in hot water, to which is then added enough water to cover the skins or hides which are then placed in this bath. Sulphide of potassium, which has been previously dissolved in as little water as possible is then added, and after the skins or hides have remained in this bath a sufficient length of time, which is about eight hours, the skins or hides are taken out and drained, and surplus water is pressed out, after which they, are finished in the usual manner.
I have found it advantageous to place the hides or skins, first, into a weak (one-half per cent.) solution of crystallized chromic acid, during half an hour or one hour, according to their thickness, and then I place them into the above mentioned metallic salts bath, which acts best when made gradually more and more concentrated.
It will be evident that the metallic salts baths may be divided into several baths, prefing about eight hours, more or less, according to the thickness of the skins or hides to be tawed. The liquor in which the skins are placed may be analyzed after the removal of the skins and again brought to the proper concentration required, when it can be used for the treatment of a second batch of skins or hides to be tawed. Leather made in this manner will be perfectly waterproof, elastic and strong. The duration of the process is short and can be used for skins or hides of every description. Of course it will be evident, that the exact proportions of the several ingredients employed in my process of tanning hides or skins may be varied, without departingfrom the scope of mypresentinvention.
Having thus described my invention, what I claim is- 1. In the art of tawing skins or hides, the herein described process, which consists in treating the same with a bath comprising ing of chrome alum, zinc sulphate, manganese sulphate, sodium chloride, and sulphide of potassium, substantially as set forth.
In testimony that I claim the invention set t5 forth above I have hereunto set my hand this 31st day of December, 1892.
WILLIAM ZAHN.
Witnesses:
FREDK. O. FRAENTZEL, CHAS. MUELLER.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US504014A true US504014A (en) | 1893-08-29 |
Family
ID=2572852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US504014D Expired - Lifetime US504014A (en) | Art of tawing skins |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US504014A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2809878A (en) * | 1954-05-13 | 1957-10-15 | American Zinc Lead & Smelting | Process of producing white tanned leather by precipitating in situ zinc sulfide and sulfhydrate compounds and product produced therefrom |
-
0
- US US504014D patent/US504014A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2809878A (en) * | 1954-05-13 | 1957-10-15 | American Zinc Lead & Smelting | Process of producing white tanned leather by precipitating in situ zinc sulfide and sulfhydrate compounds and product produced therefrom |
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