US2225083A - Treatment of chrome leather - Google Patents
Treatment of chrome leather Download PDFInfo
- Publication number
- US2225083A US2225083A US170390A US17039037A US2225083A US 2225083 A US2225083 A US 2225083A US 170390 A US170390 A US 170390A US 17039037 A US17039037 A US 17039037A US 2225083 A US2225083 A US 2225083A
- Authority
- US
- United States
- Prior art keywords
- leather
- acid
- treatment
- deacidifying
- chrome
- 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
- 239000010985 leather Substances 0.000 title description 15
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title description 9
- 239000002253 acid Substances 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 10
- 150000003839 salts Chemical class 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 6
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 5
- 235000003704 aspartic acid Nutrition 0.000 description 5
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 5
- 238000004043 dyeing Methods 0.000 description 4
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- -1 alkaline earth metal salts Chemical class 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 241000920033 Eugenes Species 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000000126 substance Substances 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
-
- 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
- C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
Definitions
- the present invention relates to a new treatment of leather tanned with chrome tanning agents for the purpose of deacidifying it.
- deacidifying can be advan- 5 tageously carried out with basic-reacting salts, in particular alkali or alkaline earth metal salts or quaternary ammonium salts, of weak nitrogenous organic polycarboxylic acids which have the property of so changing chromium hydroxide free from electrolytes in neutral aqueous solu-' tion that by the subsequent addition of acid or substantive dyestufis, which otherwise would form diflicultly soluble compounds therewith, no
- Suitable salts are for example alkaline reacting alkali and alkaline earth metal salts, as well as quaternary ammonium salts of weak nitrogenous organic polycarboxylic acids, such as triglycolamic and aspartic acid.
- the process which may be used for leather which has been tanned with chrome tanning agents alone or with the co-employment of other tanning agents, offers the advantage that by dyeing the leather, very uniform dyeings are obtained.
- the said deacidifying agents may be used as such, in admixture with each other, or in conjunction with known neutralizing agents or substances which favor the homogeneity of the dyeing of the leather.
- the deacidification may also be carried out simultaneously with the dyeing;
- Example 100 parts of shaved chrome leather are treated instead of the above mentioned deacidifying agents the salts of beta-nitrophthalic acid and aspartic acid may be employed.
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
Patented Dec. 17, 1940 UNITED STATES PATENT OFFICE 2,225,083 TREATMENT or CHROME LEATHER tion of Delaware No Drawing. Application October 22, 1937, Se-
rial No. 170,390.
In Germany October 31, 1936 4 Claims. 149-6) The present invention relates to a new treatment of leather tanned with chrome tanning agents for the purpose of deacidifying it.
We have found that deacidifying can be advan- 5 tageously carried out with basic-reacting salts, in particular alkali or alkaline earth metal salts or quaternary ammonium salts, of weak nitrogenous organic polycarboxylic acids which have the property of so changing chromium hydroxide free from electrolytes in neutral aqueous solu-' tion that by the subsequent addition of acid or substantive dyestufis, which otherwise would form diflicultly soluble compounds therewith, no
formation of difilcultly soluble compounds is caused.
Suitable salts are for example alkaline reacting alkali and alkaline earth metal salts, as well as quaternary ammonium salts of weak nitrogenous organic polycarboxylic acids, such as triglycolamic and aspartic acid.
The process, which may be used for leather which has been tanned with chrome tanning agents alone or with the co-employment of other tanning agents, offers the advantage that by dyeing the leather, very uniform dyeings are obtained.
The said deacidifying agents may be used as such, in admixture with each other, or in conjunction with known neutralizing agents or substances which favor the homogeneity of the dyeing of the leather. The deacidification may also be carried out simultaneously with the dyeing;
Example 100 parts of shaved chrome leather are treated Instead of the above mentioned deacidifying agents the salts of beta-nitrophthalic acid and aspartic acid may be employed.
What we claim is:
1. The process of deacidifying a leather tanned while using a chrome tanning agent which comprisestreating the said leather with a salt selected from the alkali metal, alkaline earth meta1 and quaternary ammonium salts of triglycolamic acid.
2. The process of deacidifying a leather tanned while using a chrome tanning agent which comprises treating the said leather with a basic-reacting salt of a weak organic nitrogenous polycarboxylic acid selected from the group consisting of triglycolamic acid and aspartic acid which salt has the property of so changing chromium hydroxide free from electrolytes in neutral aqueous solutions that by the subsequent addition of an acid dyestufi which otherwise would form a difiicultly soluble compound therewith, formation of a diificultly soluble compound is avoided.
3. The process of deacidifying a leather tanned while using a chrome tanning agent which comprises treating the said leather with a basic reacting alkali salt of a weak organic nitrogenous polycarboxylic acid selected from the group consisting of triglycolamic acid and aspartic acid which salt has the property of so changing chromium hydroxide free from electrolytes in neutral aqueous solutions that by the subsequent addition of an acid dyestuif which otherwise would form a diflicultly soluble compound therewith, formation of a difficultly soluble compound is avoided.
4. The process of deacidifying a leather tanned while using a chrome tanning agent which comprises treating the said leather with a basic-reacting salt selected from the class consisting of the alkali metal, alkaline earth metal and quaternary ammonium salts of organic nitrogenous polycarboxylic acids selected from the group consisting of triglycolamic acid and aspartic acid.
GERHARD o'rro. EUGEN HAMENDOERFER.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2225083X | 1936-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2225083A true US2225083A (en) | 1940-12-17 |
Family
ID=7991064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US170390A Expired - Lifetime US2225083A (en) | 1936-10-31 | 1937-10-22 | Treatment of chrome leather |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2225083A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1159125B (en) * | 1958-09-03 | 1963-12-12 | Schill & Seilacher Chem Fab | Process for the simultaneous neutralization and greasing of bare bones treated with chrome tanning agents |
-
1937
- 1937-10-22 US US170390A patent/US2225083A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1159125B (en) * | 1958-09-03 | 1963-12-12 | Schill & Seilacher Chem Fab | Process for the simultaneous neutralization and greasing of bare bones treated with chrome tanning agents |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2225083A (en) | Treatment of chrome leather | |
| DE3419405A1 (en) | METHOD FOR PRODUCING LEATHER AND FURS | |
| DE740472C (en) | Process for pickling ashed skin | |
| EP0024014B1 (en) | Method of retanning mineral tanned leather with aromatic sulfonic acids | |
| US1941285A (en) | Titanium sulphate compounds | |
| DE663827C (en) | Process for de-acidifying leather tanned using chrome tanning agents | |
| US2923595A (en) | Method of soaking animal hides and skins | |
| DE639787C (en) | Process for the production of iron leather | |
| DE487670C (en) | Process for tanning hides and skins with the help of iron compounds | |
| DE685744C (en) | Process for fixing tanning agents in leather | |
| GB476581A (en) | Improvements in or relating to the treatment of textile materials and compositions for such treatment | |
| US1603169A (en) | Tanning material and process of producing same | |
| US1941485A (en) | Manufacture of leather | |
| DE767061C (en) | Process for pickling ashed skin | |
| DE701549C (en) | Process for the production of tanned bare | |
| US2553375A (en) | Process of dyeing fur skins with insoluble azo dyestuffs | |
| GB569385A (en) | Improvements in or relating to methods of preparing leather and to leather prepared thereby | |
| US2178102A (en) | Iron-tanned leather and process of making same | |
| DE863241C (en) | Tanning process | |
| DE600727C (en) | Process for the production of mineral-tanned leather | |
| CH149899A (en) | Process for the production of a chromium-containing dye. | |
| DE629996C (en) | Process for greasing animal skins and leather | |
| DE658363C (en) | Process for the production of metal-containing azo dyes | |
| GB317834A (en) | Process for treating mineral tanned leather | |
| DE2549527B2 (en) | Process for the production of leather |