US837016A - Process for detanning mineral or chrome tanned leather or leather-waste. - Google Patents
Process for detanning mineral or chrome tanned leather or leather-waste. Download PDFInfo
- Publication number
- US837016A US837016A US17797603A US1903177976A US837016A US 837016 A US837016 A US 837016A US 17797603 A US17797603 A US 17797603A US 1903177976 A US1903177976 A US 1903177976A US 837016 A US837016 A US 837016A
- Authority
- US
- United States
- Prior art keywords
- leather
- waste
- mineral
- detanning
- acid
- 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 17
- 239000010985 leather Substances 0.000 title description 10
- 239000002699 waste material Substances 0.000 title description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 title description 3
- 239000011707 mineral Substances 0.000 title description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 7
- 239000003292 glue Substances 0.000 description 7
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical class Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 235000011167 hydrochloric acid Nutrition 0.000 description 4
- 108010010803 Gelatin Proteins 0.000 description 3
- 235000012255 calcium oxide Nutrition 0.000 description 3
- 229920000159 gelatin Polymers 0.000 description 3
- 239000008273 gelatin Substances 0.000 description 3
- 235000019322 gelatine Nutrition 0.000 description 3
- 235000011852 gelatine desserts Nutrition 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 2
- 235000006408 oxalic acid 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
- 238000005406 washing Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229960002050 hydrofluoric acid Drugs 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09H—PREPARATION OF GLUE OR GELATINE
- C09H3/00—Isolation of glue or gelatine from raw materials, e.g. by extracting, by heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S530/00—Chemistry: natural resins or derivatives; peptides or proteins; lignins or reaction products thereof
- Y10S530/827—Proteins from mammals or birds
- Y10S530/842—Skin; hair; nails; sebaceous glands; cerumen
Definitions
- tracting process also lasted too long.
- the present invention relates to a new or improved method or process whereby mineral-dressed materials--such, for instance, as chrome-tanned leather or leatherwastecan have the tanning substance removed for the purpose-of making gelatin or glue therefrom.
- the sulfuric acid formed with the quicklime which was also used, a plaster or gypsum mud, which rendered the worln'ng updifiicult and gave the glue produced a bad appearance.
- the tannin-ex- It required from thirty-six to forty days.
- the action of the sulfuric acid upon the spetches or glue materials was the chief reason why the quality and appearance of the glue obtained was not satisfactory.
- the leather cuttings are washed and laid in acid.
- muriatic acid is preferably employed; but any othermineral acids can also be used-such as fluorhydric acid, sulfurous acid, &c.either alone or combined with muriatic acid.
- An acid solution of a determined degree of concentra tion is used, according to the kind of acid.
- the acid for instance, muriatic acidremoves the tannin not only from the leather- Waste, but also dissolves any mineral admixtures which may originate from the tanning,
- the method of preparing glue which consists in subjecting chrome-tanned leather to the action of an alkaline solution, washing it thoroughly in water, steeping itwin murlatic acid, again carefully washing withflwater, 10 and finally neutralizing the resultant product.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Description
, tracting processalso lasted too long.
UNITED STATES PATENT OFFICE.
ALBERT RUDOLF WEISS, JR., OF H ILCHENBACH, GERMANY. PROCESS FOR DETANNING MINERAL 0R CHROME TANNED LEATHER 0R LEATHER-WASTE.
Specification of Letters Patent.
Patented 39v. 27, 19L 6.
Application filed October 21, 1903. Serial No. 177,976.
To all whom it may concern.-
Be it known that I, ALBERT RUnoLF WEISS, Jr. a subject of the German Emperor, residing at Hilchenbach, Westphalia, in the Kingdom of Prussia, Germany, have invented certain new and useful Improvements in an Improved Process for Detanning Mineral or Chrome Tanned Leather or Leather-Waste, of which the following is a s ecification.
The present invention relates to a new or improved method or process whereby mineral-dressed materials--such, for instance, as chrome-tanned leather or leatherwastecan have the tanning substance removed for the purpose-of making gelatin or glue therefrom.
As is known, several attempts have al ready been made to prepare leather-waste by suitable treatment in such a way that gelatin and glue can be produced therefrom. Thus a process is already known whereby barktanned or chamoised leather-waste is treated first with alkalies or quicklime and then with oxalic acid. Furthermore, attempts have been made to remove the tannin from leatherwaste with the aid of sulfuric acid, this process being especially applicable to leatherwaste. The first-named process did not prove suitable even for bark-tanned or chamoised leather. For mineral-tanned, and especially chrome-tanned, leather it has not been used at all, as such tanned leathers were quite unknown at the time, and a process 'which had failed with bark-tanned and chamoised leather would not have been tried formineral or chrome tanned leather. The commercial failure of the process was due to the fact that the oxalic acid had an insufficient solvent-action and formed insoluble salts with the lime which was used in the form of quicklim'e. Owing to their price it was out of the question to use other alkalies with such a process if it was to be carried out on an industrial scale. With the second process mentioned the sulfuric acid formed with the quicklime, which was also used, a plaster or gypsum mud, which rendered the worln'ng updifiicult and gave the glue produced a bad appearance. The tannin-ex- It required from thirty-six to forty days. The action of the sulfuric acid upon the spetches or glue materials was the chief reason why the quality and appearance of the glue obtained was not satisfactory. These drawbacks are entirely removed by the method or process according to the present invention. According to this process the leather or the leather-waste (it being here a question of mineral-tanned, and more especially of chrometanned leather-waste) is treated first with alkalies. With a view to chea ness, instead of alkalies there can also be use uicklime or the corresponding combinationo one of the other alkaline earths either alone or with a slight addition of alkali,for instance, soda.
After the treatment with-quicklime, which can be used as lime-milk or in any other composition desired, the leather cuttings are washed and laid in acid. For this muriatic acid is preferably employed; but any othermineral acids can also be used-such as fluorhydric acid, sulfurous acid, &c.either alone or combined with muriatic acid. An acid solution of a determined degree of concentra tion is used, according to the kind of acid. The acidfor instance, muriatic acidremoves the tannin not only from the leather- Waste, but also dissolves any mineral admixtures which may originate from the tanning,
.the action of quicklime and then of muriatic acid upon the waste saves a considerable furic ,acid only a common glue is obtained,
while the use of muriatic acid enables a good gelatin to be produced. If the process is to e unusually accelerated, the time therefor can be still further reduced by the use of meamount oftime, The detanning and boiling chanically-agitated vessels, such as are used in various manufacturing branches, and employed forthe detanning processes.
What I claim as my invention, and desire to secure by Letters Patent, is-
The method of preparing glue, which consists in subjecting chrome-tanned leather to the action of an alkaline solution, washing it thoroughly in water, steeping itwin murlatic acid, again carefully washing withflwater, 10 and finally neutralizing the resultant product. Y
\ In testimony whereof I have hereunto set my hand in resenoe of two witnesses. Y
ALB RT RUDOLF WEISS, JR.
Witnesses:
GUSTAV OEsNER, WILHELM R PPERs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17797603A US837016A (en) | 1903-10-21 | 1903-10-21 | Process for detanning mineral or chrome tanned leather or leather-waste. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US17797603A US837016A (en) | 1903-10-21 | 1903-10-21 | Process for detanning mineral or chrome tanned leather or leather-waste. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US837016A true US837016A (en) | 1906-11-27 |
Family
ID=2905490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US17797603A Expired - Lifetime US837016A (en) | 1903-10-21 | 1903-10-21 | Process for detanning mineral or chrome tanned leather or leather-waste. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US837016A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2471022A (en) * | 1945-01-13 | 1949-05-24 | Richard Hodgson And Sons Ltd | Process of preserving vegetable tanned leather |
| US2751377A (en) * | 1953-02-26 | 1956-06-19 | Armour & Co | Method of extracting animal glue |
| US4100154A (en) * | 1977-04-22 | 1978-07-11 | A. L. Gebhardt Company | Process for recovery and separation of nutritious protein hydrolysate and chromium from chrome leather scrap |
-
1903
- 1903-10-21 US US17797603A patent/US837016A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2471022A (en) * | 1945-01-13 | 1949-05-24 | Richard Hodgson And Sons Ltd | Process of preserving vegetable tanned leather |
| US2751377A (en) * | 1953-02-26 | 1956-06-19 | Armour & Co | Method of extracting animal glue |
| US4100154A (en) * | 1977-04-22 | 1978-07-11 | A. L. Gebhardt Company | Process for recovery and separation of nutritious protein hydrolysate and chromium from chrome leather scrap |
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