US511007A - Art of tawing hides or skins - Google Patents
Art of tawing hides or skins Download PDFInfo
- Publication number
- US511007A US511007A US511007DA US511007A US 511007 A US511007 A US 511007A US 511007D A US511007D A US 511007DA US 511007 A US511007 A US 511007A
- Authority
- US
- United States
- Prior art keywords
- skins
- hides
- art
- tawing
- sulphide
- 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
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 9
- 239000010985 leather Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- OIDPCXKPHYRNKH-UHFFFAOYSA-J chrome alum Chemical compound [K]OS(=O)(=O)O[Cr]1OS(=O)(=O)O1 OIDPCXKPHYRNKH-UHFFFAOYSA-J 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical class O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
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 more particularly to anew and improved process of tawing skins or hides for the purpose of making kid leather, the present process being an improvement over my former process of tawing hides, described in my application for Letters Patent of the United States filed October 13, 1892, Serial No. 448,759.
- This invention relates more especially to a novel process for tawing skins or hides, and consists in subjecting the skins or hides to the action of certain metallic compounds, which are ofiered to the skins in two dififerent baths, and whereby, by exposing the skins or hides to the action ofthe chemical compositions, the leather is rendered, not only watar-proof, soft and flexible, but a leather of higher superiority in quality is the result, than leather made by other similar processes.
- the skins or hides For preparing the skins or hides and producing a strong, flexible and water -proof leather in a much shorter time than heretofore, I subject the skins or hides, after the raw hide has been prepared in the ordinary manner for tanning, to two baths.
- the first bath consists of a weak, preferably a one-half per cent. solution of chromic acid or its equivalent.
- the previously prepared hides or skins are placed in this solution, and after they have been left therein from one to three hours or more, according to the thickness of the skins so as to be thoroughly impregnated by the solution, they are removed therefrom and drained and the surplus water is pressed out.
- the skins or hides are then transferred to the second bath, which consists essentially.
- a chromic oxide salt and a sulphide of an alkali or a suitable sulphide of an earth alkali.
- chromic oxide salt I prefer to use chrome alum and for the sulphide I may use sulphide of sodium or sulphide of potassium.
- the hides or skins are left in this bath from ten to fifteen hours according to their thickness, and are then removed, washed, and'finished in the ordinary manner.
- the liquor in which the skins are placed may be analyzed after their removal and brought to the proper concentration required, when the baths can be used for the treatment of the second batch of skins or hides, as will be evident.
- the leather produced in this manner is very soft, elastic, strong and water-proof.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Coloring (AREA)
Description
UNITED STATES PATENT OFFICE.
WILLIAM ZAlilN, OF NEWARK, NEW JERSEY.
ART OF TAWING HlDES OR KlNS.
SPECIFICATION forming part of Letters Patent No. 511,007, dated December 19, 1893.
Application filedMay 27, 1893- Serial No. 4%,684- (No specimens.)
To all whom it may concern:
Be it known that 1, 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 Hides or Skins; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
My present invention has reference more particularly to anew and improved process of tawing skins or hides for the purpose of making kid leather, the present process being an improvement over my former process of tawing hides, described in my application for Letters Patent of the United States filed October 13, 1892, Serial No. 448,759.
This invention relates more especially to a novel process for tawing skins or hides, and consists in subjecting the skins or hides to the action of certain metallic compounds, which are ofiered to the skins in two dififerent baths, and whereby, by exposing the skins or hides to the action ofthe chemical compositions, the leather is rendered, not only watar-proof, soft and flexible, but a leather of higher superiority in quality is the result, than leather made by other similar processes.
In order that a clear understanding may be had of my present invention and the manner in which the same is to be put into practice, I will now give a description of the same.
For preparing the skins or hides and producing a strong, flexible and water -proof leather in a much shorter time than heretofore, I subject the skins or hides, after the raw hide has been prepared in the ordinary manner for tanning, to two baths. The first bath consists of a weak, preferably a one-half per cent. solution of chromic acid or its equivalent. The previously prepared hides or skins are placed in this solution, and after they have been left therein from one to three hours or more, according to the thickness of the skins so as to be thoroughly impregnated by the solution, they are removed therefrom and drained and the surplus water is pressed out. The skins or hides are then transferred to the second bath, which consists essentially.
of a chromic oxide salt and a sulphide of an alkali or a suitable sulphide of an earth alkali. For the chromic oxide salt I prefer to use chrome alum and for the sulphide I may use sulphide of sodium or sulphide of potassium. The hides or skins are left in this bath from ten to fifteen hours according to their thickness, and are then removed, washed, and'finished in the ordinary manner.
The liquor in which the skins are placed may be analyzed after their removal and brought to the proper concentration required, when the baths can be used for the treatment of the second batch of skins or hides, as will be evident.
The leather produced in this manner is very soft, elastic, strong and water-proof.
Of course I am aware that some of the substances named herein above have been used before,but never before, to my knowledge, in the combination herein above described, and the sulphide of an alkali or earth alkali has not been used before for the purposes herein set forth.
Having thus described my invention, what I claim is 1. In the art of tawing skins or hides, the herein described composition consisting of chrome alum, sulphide of sodium and sulphide of potassium, substantially as set forth.
2. In the art of tawing skins or hides, the herein above mentioned-composition consisting of chrome alum, and a sulphide of an akali or earth alkali, substantially as set forth.
In testimony that I claim the invention set forth above I have hereunto set my hand this 22d day of May, 189-3.
WILLIAM ZAHN.
Witnesses:
WM. H. CAMFIELD, J r., FREDK. O. FRAENTZEL.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US511007A true US511007A (en) | 1893-12-19 |
Family
ID=2579834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US511007D Expired - Lifetime US511007A (en) | Art of tawing hides or skins |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US511007A (en) |
-
0
- US US511007D patent/US511007A/en not_active Expired - Lifetime
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