US1395733A - Tanning - Google Patents
Tanning Download PDFInfo
- Publication number
- US1395733A US1395733A US1395733DA US1395733A US 1395733 A US1395733 A US 1395733A US 1395733D A US1395733D A US 1395733DA US 1395733 A US1395733 A US 1395733A
- Authority
- US
- United States
- Prior art keywords
- tanning
- formaldehyde
- bath containing
- skins
- insoluble
- 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
- WSFSSNUMVMOOMR-UHFFFAOYSA-N formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 36
- 210000003491 Skin Anatomy 0.000 description 18
- 150000001491 aromatic compounds Chemical class 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000007859 condensation product Substances 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- GHMLBKRAJCXXBS-UHFFFAOYSA-N Resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000010985 leather Substances 0.000 description 4
- WVNKNVVVOHHGBZ-UHFFFAOYSA-N OCl.NC1=CC=CC2=CC=CC=C12 Chemical compound OCl.NC1=CC=CC2=CC=CC=C12 WVNKNVVVOHHGBZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 150000001447 alkali salts Chemical class 0.000 description 2
- 150000004780 naphthols Chemical class 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000000717 retained Effects 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C14C3/28—Multi-step processes
Definitions
- ADOLF lib MEIR OF STU'ITGART, GERMANY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE CHEMICAL FOUNDATION, INC., A CORPORATION OF DELAWARE.
- the present invention relates to the method of tanning skins and more particularly to tanning by means of synthetic condensation products of formaldehyde and aromatic compounds. It is known that certain aromatic compounds give insoluble prod:
- ucts when they are brought together, in aqueous solution, with formaldehyde and according to the present invention 1 make use of this reaction for tanning skins by treating the skins alternately with formaldehyde and with an aqueous solution of a compound which has the property of giving insoluble condensation products with formaldehyde.
- a compound which has the property of giving insoluble condensation products with formaldehyde When the said compound is suificiently soluble in water to be dissolved in the tanning bath, such as for instance resorcinol, it can be used in the free state, otherwise it can be used in the form of a salt or other derivative; for instance I can use alkali salts of the naphthols, salts of the naphthylamins with acids and so on.
- the insoluble formaldehyde condensation product is formed in the fiber of the skin and is thereby intimately attached thereto.
- the reverse succession can be employed, if the aromatic compound is sulficiently retained by the fiber. If desired the succession of said steps can be repeated several times.
- the hide to be tanned is first treated with a bath containing 2 to 5 per cent. of -lormaldehyde, during one or several days according to the thickness of the skin. Then the hide is treated with a bath containing say 1 to 2 per cent. of alpha-naphthylamin chlorhydrate during several days, where upon the leather is finished in the usual way.
- the properties of the leather may be modified by varying the time of treatment, the concentrations employed or by adding other substances, for instance tanning substances oi vegetable nature.
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)
Description
UNITED srarss FAT-ENE @FFHQE.
ADOLF lib MEIR, OF STU'ITGART, GERMANY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE CHEMICAL FOUNDATION, INC., A CORPORATION OF DELAWARE.
Patented Nov. 1, 1921.
r TANNING.
1,395,733, Specification of Letters Patent.
Ho Drawing. Application filed December 23, 1916.
To all whom it may concern:
Be it known that I, Anonr R-6MER, citizen of the German Empire, residing at Stuttgart, Germany have invented new and useful Improvements in Tanning, of which the following is a specification.
The present invention relates to the method of tanning skins and more particularly to tanning by means of synthetic condensation products of formaldehyde and aromatic compounds. It is known that certain aromatic compounds give insoluble prod:
ucts when they are brought together, in aqueous solution, with formaldehyde and according to the present invention 1 make use of this reaction for tanning skins by treating the skins alternately with formaldehyde and with an aqueous solution of a compound which has the property of giving insoluble condensation products with formaldehyde. When the said compound is suificiently soluble in water to be dissolved in the tanning bath, such as for instance resorcinol, it can be used in the free state, otherwise it can be used in the form of a salt or other derivative; for instance I can use alkali salts of the naphthols, salts of the naphthylamins with acids and so on. By this process, the insoluble formaldehyde condensation product is formed in the fiber of the skin and is thereby intimately attached thereto. Generally I have found it preferable first to act on the skin with formaldehyde and then with the solution-of the aromatic compound, but often the reverse succession can be employed, if the aromatic compound is sulficiently retained by the fiber. If desired the succession of said steps can be repeated several times.
Serial No. 138,665.
In order to illustrate my invention. more fully I give the following example, but the invention is of course not confined to this example:
The hide to be tanned is first treated with a bath containing 2 to 5 per cent. of -lormaldehyde, during one or several days according to the thickness of the skin. Then the hide is treated with a bath containing say 1 to 2 per cent. of alpha-naphthylamin chlorhydrate during several days, where upon the leather is finished in the usual way. The properties of the leather may be modified by varying the time of treatment, the concentrations employed or by adding other substances, for instance tanning substances oi vegetable nature.
Now what I claim is:
1. The process of tanning which comprises treating the skins in a bath containing formaldehyde and subsequently in a bath containing a salt of a naphthylamin.
2. The process of tanning which comprises treating the skins in a bath containing tormaldehyde and subsequently in a bath containing an alphanaphthylaminchlorhydrate.
3. The process of tanning which comprises treating the skins in a bath containing formaldehyde and subsequently in a bath containing a soluble aromatic compound containing an animo group and capable of forming an insoluble product with formaldehyde.
In testimony whereof I have hereunto set my hand.
DR. ADULF RUMEB.
In presence of EnNnsT ENTEMANN, FRIEDA KLAIBER.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1395733A true US1395733A (en) | 1921-11-01 |
Family
ID=3400102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US1395733D Expired - Lifetime US1395733A (en) | Tanning |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1395733A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2519842A (en) * | 1947-06-28 | 1950-08-22 | American Enka Corp | Treatment of wool and other animal fibers |
| US2552130A (en) * | 1946-12-13 | 1951-05-08 | John R Evans & Company | Tanning proteinaceous fibers with a mixture of an aldehyde and a polyhydric phenol in a molecular ratio of at least 2 to 1 |
| US2552129A (en) * | 1946-05-11 | 1951-05-08 | John R Evans & Company | Tanning with a free aldehyde and a free polyhydric phenol mixture in a molecular ratio of at least 2 to 1 |
| US2840445A (en) * | 1954-06-09 | 1958-06-24 | Koppers Co Inc | Process of retaning mineral tanned leather with resorcinol-formaldehyde |
-
0
- US US1395733D patent/US1395733A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2552129A (en) * | 1946-05-11 | 1951-05-08 | John R Evans & Company | Tanning with a free aldehyde and a free polyhydric phenol mixture in a molecular ratio of at least 2 to 1 |
| US2552130A (en) * | 1946-12-13 | 1951-05-08 | John R Evans & Company | Tanning proteinaceous fibers with a mixture of an aldehyde and a polyhydric phenol in a molecular ratio of at least 2 to 1 |
| US2519842A (en) * | 1947-06-28 | 1950-08-22 | American Enka Corp | Treatment of wool and other animal fibers |
| US2840445A (en) * | 1954-06-09 | 1958-06-24 | Koppers Co Inc | Process of retaning mineral tanned leather with resorcinol-formaldehyde |
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