ES376210A1 - Process for chromium tanning and bath for carrying out said process - Google Patents
Process for chromium tanning and bath for carrying out said processInfo
- Publication number
- ES376210A1 ES376210A1 ES376210A ES376210A ES376210A1 ES 376210 A1 ES376210 A1 ES 376210A1 ES 376210 A ES376210 A ES 376210A ES 376210 A ES376210 A ES 376210A ES 376210 A1 ES376210 A1 ES 376210A1
- Authority
- ES
- Spain
- Prior art keywords
- per cent
- parts
- chromium salt
- bath
- aluminium
- 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
Links
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
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)
Abstract
In a process for the tanning of leather using at least one trivalent chromium salt, the chromium salt is mixed with a double carbonate of aluminium and an alkaline metal. Preferably, a double carbonate of aluminium and sodium is used, having a composition given by the following percentages by weight: Al 2 O 3 , 30 to 50 per cent CO 2 , 10 to 25 per cent Na 2 O, 10 to 20 per cent, and this composition is preferably modified by heat treatment, at temperatures in the range of 250-300 C. for about two to three hours, to reduce the CO 2 content to between 0À4 and 2 per cent prior to mixing it with the chromium salt. In the example, 100 parts of the skin are pickled at pH 3À1 to 3À3 in 30 to 70 parts of an acid bath and are then treated with 10 to 15 parts of the mixture in aqueous solution.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR6902541A FR2031725A5 (en) | 1969-02-05 | 1969-02-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES376210A1 true ES376210A1 (en) | 1972-03-16 |
Family
ID=9028643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES376210A Expired ES376210A1 (en) | 1969-02-05 | 1970-02-04 | Process for chromium tanning and bath for carrying out said process |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3690812A (en) |
| BE (1) | BE745359A (en) |
| BR (1) | BR7016573D0 (en) |
| ES (1) | ES376210A1 (en) |
| FR (1) | FR2031725A5 (en) |
| GB (1) | GB1272532A (en) |
| NL (1) | NL7001593A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4502859A (en) * | 1983-04-11 | 1985-03-05 | Rockmont Industries, Inc. | Hide tanning composition and method of preparing same |
| GB8409266D0 (en) * | 1984-04-10 | 1984-05-23 | Alcan Int Ltd | Tanning of leather using aluminium compounds |
-
1969
- 1969-02-05 FR FR6902541A patent/FR2031725A5/fr not_active Expired
-
1970
- 1970-02-02 BE BE745359D patent/BE745359A/en unknown
- 1970-02-03 US US8431A patent/US3690812A/en not_active Expired - Lifetime
- 1970-02-04 GB GB5390/70A patent/GB1272532A/en not_active Expired
- 1970-02-04 NL NL7001593A patent/NL7001593A/xx unknown
- 1970-02-04 BR BR216573/70A patent/BR7016573D0/en unknown
- 1970-02-04 ES ES376210A patent/ES376210A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE745359A (en) | 1970-07-16 |
| DE2004682A1 (en) | 1970-11-19 |
| US3690812A (en) | 1972-09-12 |
| BR7016573D0 (en) | 1973-02-20 |
| GB1272532A (en) | 1972-05-03 |
| NL7001593A (en) | 1970-08-07 |
| FR2031725A5 (en) | 1970-11-20 |
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