US590036A - Carl dreiier - Google Patents
Carl dreiier Download PDFInfo
- Publication number
- US590036A US590036A US590036DA US590036A US 590036 A US590036 A US 590036A US 590036D A US590036D A US 590036DA US 590036 A US590036 A US 590036A
- Authority
- US
- United States
- Prior art keywords
- skins
- carl
- chromium
- bath
- dreiier
- 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 description 30
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 12
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 12
- 235000014655 lactic acid Nutrition 0.000 description 12
- 239000004310 lactic acid Substances 0.000 description 12
- 150000003839 salts Chemical class 0.000 description 12
- 239000011780 sodium chloride Substances 0.000 description 12
- 229910052804 chromium Inorganic materials 0.000 description 10
- 239000011651 chromium Substances 0.000 description 10
- 239000010985 leather Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- KMUONIBRACKNSN-UHFFFAOYSA-N Potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 235000010755 mineral Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- AKHNMLFCWUSKQB-UHFFFAOYSA-L Sodium thiosulphate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 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
- 239000002253 acid Substances 0.000 description 2
- -1 chrome compound Chemical class 0.000 description 2
- 150000001844 chromium Chemical class 0.000 description 2
- QSWDMMVNRMROPK-UHFFFAOYSA-K chromium(3+) trichloride Chemical compound [Cl-].[Cl-].[Cl-].[Cr+3] QSWDMMVNRMROPK-UHFFFAOYSA-K 0.000 description 2
- UOUJSJZBMCDAEU-UHFFFAOYSA-N chromium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+3].[Cr+3] UOUJSJZBMCDAEU-UHFFFAOYSA-N 0.000 description 2
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 description 2
- 235000018553 tannin Nutrition 0.000 description 2
- 229920001864 tannin Polymers 0.000 description 2
- 239000001648 tannin 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
- Nrrnn YTATES ATENT Fries Nrrnn YTATES ATENT Fries.
- the chromium oxid is formed within the skins by charging them first with chromium salt, say chromium chlorid, and then depositing the oxid of chromium by immersing the skins so charged in an alkaline bath, or the skins are treated with salts of chromium-trioxid, and these salts are subsequently reduced in a second bath containing a reducing medium such,for example,as sodium thiosulfate or sulfureted hydrogen.
- chromium salt say chromium chlorid
- the fixing of the oxid of chromium in the skins may, however, be effected much more easily and even in a single bath if the skins are treated with a mixture of trioxid of chromium or its salts and lactic acid or salts thereof.
- Very good leather may be made in a comparatively short time in a single bath if, for eXample,oX-hides be treated in a'bath containing for every liter of water four grams lactic acid, (seventy-three per cent.,) 2.6 grams bichromate of potash, and 0.9 grams sulfuric acid.
- the skin prepared for tanning as usual and previously slightly swelled should be allowed to remain for about three days and then successively for a period of eight days in a bath at first twice as strong and then four times as strong as, that above mentioned.
- the skin after only three days immersion appears to be thoroughly penetrated with oXid of chromium and it looks green throughout.
- the skins are afterward washed, dried, and prepared, as usual.
- Thinner skins as calfskins and goatskins, are transformed into leather by treating them for about two days in a bath containing for every liter of water four grams lactic acid, (seventy-three per cent.,) 2.6 grams bichromate of potash, and 0.9 grams sulfuric acid.
- the best mode of procedure is to swell the skins slightly for about half an hour in the bath containing at first only the lactic acid above, adding the sulfuric acid and bichromate of potash afterward. To accelerate the process, the bath also may be slightly heated, say, to about 40 centigrade.
Description
Nrrnn YTATES ATENT Fries.
CARL DREl-IER, OF NIEDERINGELIIEIM, GERMANY, ASSIGNOR TO O/II.
BOEI-IRINGER S OHN, OF SAME PLACE.
SPECIFICATION forming part of Letters latent No. 590,036, dated September 14, 1897. Application filed October 21, 1896. Serial No. 609,582. (No specimens.) Patented in Germany April 9, 1897, No. 91,822-
To aZZ whom it may concern:
Be it known that I, CARL DREI-IER, chemist, doctor of philosophy, of Niederingelheim, on the Rhine, Germany, have invented new and useful Improvements in Processes of ManufacturingLeather, of which the following is a specification, and for which Letters Patent No. 91,822 were obtained with my consent by my assigns in Germany under date of June 23,1896, butissued April 9, 1897.
Formerly tannin was exclusively used in the manufacture of leather, but in recent years the practice of filling skins wit-h mineral oxids-for example, chromium oxids has become more and more common.
In manufacturingchrome-tanned leather the chromium oxid is formed within the skins by charging them first with chromium salt, say chromium chlorid, and then depositing the oxid of chromium by immersing the skins so charged in an alkaline bath, or the skins are treated with salts of chromium-trioxid, and these salts are subsequently reduced in a second bath containing a reducing mediumsuch,for example,as sodium thiosulfate or sulfureted hydrogen. The fixing of the oxid of chromium in the skins may, however, be effected much more easily and even in a single bath if the skins are treated with a mixture of trioxid of chromium or its salts and lactic acid or salts thereof.
Very good leather may be made in a comparatively short time in a single bath if, for eXample,oX-hides be treated in a'bath containing for every liter of water four grams lactic acid, (seventy-three per cent.,) 2.6 grams bichromate of potash, and 0.9 grams sulfuric acid. In this bath the skin prepared for tanning as usual and previously slightly swelled should be allowed to remain for about three days and then successively for a period of eight days in a bath at first twice as strong and then four times as strong as, that above mentioned. The skin after only three days immersion appears to be thoroughly penetrated with oXid of chromium and it looks green throughout. The skins are afterward washed, dried, and prepared, as usual.
Thinner skins, as calfskins and goatskins, are transformed into leather by treating them for about two days in a bath containing for every liter of water four grams lactic acid, (seventy-three per cent.,) 2.6 grams bichromate of potash, and 0.9 grams sulfuric acid.
The best mode of procedure is to swell the skins slightly for about half an hour in the bath containing at first only the lactic acid above, adding the sulfuric acid and bichromate of potash afterward. To accelerate the process, the bath also may be slightly heated, say, to about 40 centigrade.
Now what I claim, and desire to secure by Letters Patent, is the following:
1. The herein-described improvement in the process of tanning skins, which consists in treating said skins in a bath containing a chrome compound, a mineral acid and lactic acid or salts thereof, substantially as and for the purpose herein described.
2. The herein-described improvement in the art of chrome-tanning skins, which consists in treating said skins with chrome compounds and with lactic acid or its salts, substantially as and for the purpose described.
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
CARL nREnER.
Vitnesses:
RICHARD WIRTH, EVA SATTLER.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US590036A true US590036A (en) | 1897-09-14 |
Family
ID=2658695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US590036D Expired - Lifetime US590036A (en) | Carl dreiier |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US590036A (en) |
-
0
- US US590036D patent/US590036A/en not_active Expired - Lifetime
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