US385222A - Tanning process - Google Patents
Tanning process Download PDFInfo
- Publication number
- US385222A US385222A US385222DA US385222A US 385222 A US385222 A US 385222A US 385222D A US385222D A US 385222DA US 385222 A US385222 A US 385222A
- Authority
- US
- United States
- Prior art keywords
- skins
- solution
- tanning
- leather
- water
- 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 10
- 210000003491 Skin Anatomy 0.000 description 50
- 239000010985 leather Substances 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 239000000203 mixture Substances 0.000 description 10
- 239000010697 neat foot oil Substances 0.000 description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 150000003839 salts Chemical class 0.000 description 8
- 239000011780 sodium chloride Substances 0.000 description 8
- 235000011149 sulphuric acid Nutrition 0.000 description 8
- 239000001117 sulphuric acid Substances 0.000 description 8
- AKHNMLFCWUSKQB-UHFFFAOYSA-L Sodium thiosulphate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 6
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 6
- 229910052700 potassium Inorganic materials 0.000 description 6
- 239000011591 potassium Substances 0.000 description 6
- 235000019345 sodium thiosulphate Nutrition 0.000 description 6
- 239000001263 FEMA 3042 Substances 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- FOHHNHSLJDZUGQ-UHFFFAOYSA-N Halofantrine Chemical compound FC(F)(F)C1=CC=C2C(C(O)CCN(CCCC)CCCC)=CC3=C(Cl)C=C(Cl)C=C3C2=C1 FOHHNHSLJDZUGQ-UHFFFAOYSA-N 0.000 description 4
- 229940033123 Tannic Acid Drugs 0.000 description 4
- LRBQNJMCXXYXIU-NRMVVENXSA-N Tannic acid Chemical compound OC1=C(O)C(O)=CC(C(=O)OC=2C(=C(O)C=C(C=2)C(=O)OC[C@@H]2[C@H]([C@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)[C@@H](OC(=O)C=3C=C(OC(=O)C=4C=C(O)C(O)=C(O)C=4)C(O)=C(O)C=3)O2)OC(=O)C=2C=C(OC(=O)C=3C=C(O)C(O)=C(O)C=3)C(O)=C(O)C=2)O)=C1 LRBQNJMCXXYXIU-NRMVVENXSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 4
- 229910052785 arsenic Inorganic materials 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229960003242 halofantrine Drugs 0.000 description 4
- 235000011167 hydrochloric acid Nutrition 0.000 description 4
- 239000010871 livestock manure Substances 0.000 description 4
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 235000011121 sodium hydroxide Nutrition 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 4
- 235000015523 tannic acid Nutrition 0.000 description 4
- 229920002258 tannic acid Polymers 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- VXMKYRQZQXVKGB-CWWHNZPOSA-N Tannin Chemical compound O([C@H]1[C@H]([C@@H]2OC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)O[C@H]([C@H]2O)O1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 VXMKYRQZQXVKGB-CWWHNZPOSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 235000021388 linseed oil Nutrition 0.000 description 2
- 239000000944 linseed oil Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 229920001864 tannin Polymers 0.000 description 2
- 235000018553 tannin Nutrition 0.000 description 2
- 239000001648 tannin Substances 0.000 description 2
- 235000015112 vegetable and seed oil Nutrition 0.000 description 2
- 239000008158 vegetable oil Substances 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
Definitions
- My invention relates to an improved process of tanning skins for making kid leather; and theprocess consists, first,in preparing the skins for tanning by treatment with sulphide of sodium or arsenic and unhairing the same, then treating it with dog-manure and a solution of salt and water. After this preparatory treatment the skins are exposed to the action of three different solutions, the first solution consisting of bichromate of potassium, salt, and muriatic acid, the second solution of hyposulphite of soda and sulphuric acid, and the third solution of a mixture of neatsfoot oil saponified by caustic soda and extract of quercitron-bark or other tannin containing extract.
- the first solution consisting of bichromate of potassium, salt, and muriatic acid
- the second solution of hyposulphite of soda and sulphuric acid the third solution of a mixture of neatsfoot oil saponified by caustic soda and extract of quercitron-bark or other tannin containing extract.
- the skins are first treated with sulphide of sodium for about three or four daysfor seven to eight days when arsenic is used.
- the skins are then unhaired,scraped,and placed in dog-manure for some time.
- the skins are then cleaned of the dogmanure and placed into a solution of five pounds of common saltand one hundred pounds of water, in which they are allowed to remain for about one-half an hour.
- the skins are then removed and exposed to the first bath, which consists for every hun dred pounds of skins of a solution of five pounds ofbichromate of potassiunntwo pounds of salt, and two and one-half pounds of miniatic acid in five gallons of water.
- the skins are placed with this solution into a tub and rotated by stirrers in the same for about thirty minutes, so as to be thoroughly impregnated by the solution.
- the skins are then allowed to remain in the solution for about three hours, after which they are again rotated for about thirty minutes with the same.
- Thinner skins have to be exposed to the action of the solution for a less length of time than thicker skins, which have to remain for a greater length of time in the solution, so as to be thoroughly impregnated by the same.
- the skins consists for every hundred pounds of skins of eight pounds of hyposulphite (Na,S,O,) of soda and one and one-half pound of sulphuric acid of 6 Baum, dissolved in ten gallons of water.
- the skins are placed with thesolution into the tub and agitated in the same for about halfan hour. After an intermission of halfan hour they are again agitated for half auhour, and then allowed to remain in the same from two to ten hours, according to the thickness of the skins.
- the leather is made soft and strong, and which consists for every one hundred pounds of skinsof a mix ture of saponified neatsfoot oil and a tanning extract.
- This mixture is prepared of one and one-halfpound of neats-footoiland twoounces of caustic soda, which are dissolved in one galion of water and heated by steam until the neatsfoot oil is properly saponified.
- an extract of five pounds of quercitroubark in five gallons of water, or any other suitable solution containing tannic acid is added.
- the skins are placed with this solution in the socalled piuwvheel, the last solution softening the skins and imparting the final tanning action to the same.
- the skins are exposed to the tannic-acid solution for about half an hour, after which the leather is removed and dyed in the usual manner.
- the dye is given to the leather while it is in the pin-wheel, it being finally washed off and allowed to dry, while for dyeing black it is best to remove the leather to the working-bench and spread the color over the same.
- a coating of oil is then given to the leather on the grain side, after which it is dried at a temperature of from 70 to 80 Fahrenheit. Ifa gloss is to be imparted to the leather, a coating of some vegetable oil, preferably linseed-oil, is finally given, which renders the leather water-proof,soft,and durable.
- tanning ICO skins which consists in subjecting the prepared and depilated skins successively to the action of three different tanning solutions: first, to a solution of bichromate of potassium, muriatic acid, and water; secondly, toa solution of hyposulphite of soda, sulphuric acid, and water, and, thirdly, to a mixture of saponified neats foot oil and a suitable bark extract, substantially as set forth.
- tanning skins which consists, first, in subjecting the skins to the preparatory treatment of unhairing, softening, and cleaning the same; second, subjecting the skins to the action of asolution of bichromate of potassium, salt, muriatic [5' acid,and water; thirdly, to the action of a solution of hyposulphite of soda, sulphuric acid, and water, and, fourthly, to the action of a mixture of saponified neats-foot oil with a suitable bark extract, substantially as set 20 forth.
Description
UNITE' STATES WILLIAM ZAHN, OF NEYVARK, NEVI JERSEY.
TANNING PROCESS.
SPECIFICATION forming part of Letters Patent No. 385,222, dated June 26, 1888. Application filed Deeeuilnrfir I887. Serial No. 259,261. (No sperimens.)
To all whom it may concern:
Be it known that I, WILLIAM ZAHN, of Newark,in the county ofEssex and State ofNew Jersey, haveinvented certain new and useful Improvements in Processes of Tanning, of which the following is a specification.
My invention relates to an improved process of tanning skins for making kid leather; and theprocess consists, first,in preparing the skins for tanning by treatment with sulphide of sodium or arsenic and unhairing the same, then treating it with dog-manure and a solution of salt and water. After this preparatory treatment the skins are exposed to the action of three different solutions, the first solution consisting of bichromate of potassium, salt, and muriatic acid, the second solution of hyposulphite of soda and sulphuric acid, and the third solution of a mixture of neatsfoot oil saponified by caustic soda and extract of quercitron-bark or other tannin containing extract.
For preparing the skins and producing a strong and soft kid leather in a much shorter time than heretofore the skins are first treated with sulphide of sodium for about three or four daysfor seven to eight days when arsenic is used. The skins are then unhaired,scraped,and placed in dog-manure for some time. The skins are then cleaned of the dogmanure and placed into a solution of five pounds of common saltand one hundred pounds of water, in which they are allowed to remain for about one-half an hour. They are then removed and exposed to the first bath, which consists for every hun dred pounds of skins of a solution of five pounds ofbichromate of potassiunntwo pounds of salt, and two and one-half pounds of miniatic acid in five gallons of water. The skins are placed with this solution into a tub and rotated by stirrers in the same for about thirty minutes, so as to be thoroughly impregnated by the solution. The skins are then allowed to remain in the solution for about three hours, after which they are again rotated for about thirty minutes with the same. Thinner skins have to be exposed to the action of the solution for a less length of time than thicker skins, which have to remain for a greater length of time in the solution, so as to be thoroughly impregnated by the same. The skins consists for every hundred pounds of skins of eight pounds of hyposulphite (Na,S,O,) of soda and one and one-half pound of sulphuric acid of 6 Baum, dissolved in ten gallons of water. The skins are placed with thesolution into the tub and agitated in the same for about halfan hour. After an intermission of halfan hour they are again agitated for half auhour, and then allowed to remain in the same from two to ten hours, according to the thickness of the skins. They are then washed and placed into the third bath, by which the leather is made soft and strong, and which consists for every one hundred pounds of skinsof a mix ture of saponified neatsfoot oil and a tanning extract. This mixture is prepared of one and one-halfpound of neats-footoiland twoounces of caustic soda, which are dissolved in one galion of water and heated by steam until the neatsfoot oil is properly saponified. Then an extract of five pounds of quercitroubark in five gallons of water, or any other suitable solution containing tannic acid, is added. The skins are placed with this solution in the socalled piuwvheel, the last solution softening the skins and imparting the final tanning action to the same. The skins are exposed to the tannic-acid solution for about half an hour, after which the leather is removed and dyed in the usual manner.
are then transferred to the second bath, which I For light colors the dye is given to the leather while it is in the pin-wheel, it being finally washed off and allowed to dry, while for dyeing black it is best to remove the leather to the working-bench and spread the color over the same. A coating of oil is then given to the leather on the grain side, after which it is dried at a temperature of from 70 to 80 Fahrenheit. Ifa gloss is to be imparted to the leather, a coating of some vegetable oil, preferably linseed-oil, is finally given, which renders the leather water-proof,soft,and durable.
By my improved method of tanning skins the same can be changed into leather in from fourteen to sixteen days, the process producing kid leather of superior quality.
Having thus described my invention, Iclaim as new and desire to secure by Letters Patent 1. The method herein described of tanning ICO skins, which consists in subjecting the prepared and depilated skins successively to the action of three different tanning solutions: first, to a solution of bichromate of potassium, muriatic acid, and water; secondly, toa solution of hyposulphite of soda, sulphuric acid, and water, and, thirdly, to a mixture of saponified neats foot oil and a suitable bark extract, substantially as set forth.
2. The method herein described of tanning skins, which consists, first, in subjecting the skins to the preparatory treatment of unhairing, softening, and cleaning the same; second, subjecting the skins to the action of asolution of bichromate of potassium, salt, muriatic [5' acid,and water; thirdly, to the action of a solution of hyposulphite of soda, sulphuric acid, and water, and, fourthly, to the action of a mixture of saponified neats-foot oil with a suitable bark extract, substantially as set 20 forth.
In testimony thatI claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.
. WILLIAM ZAHN.
Witnesses:
PAUL GonPEL, JOHN A. STRALEY.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US385222A true US385222A (en) | 1888-06-26 |
Family
ID=2454206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US385222D Expired - Lifetime US385222A (en) | Tanning process |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US385222A (en) |
-
0
- US US385222D patent/US385222A/en not_active Expired - Lifetime
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