IT1155361B - Treatment of tannery waste to give chromium sulphate and proteins - Google Patents
Treatment of tannery waste to give chromium sulphate and proteinsInfo
- Publication number
- IT1155361B IT1155361B IT22416/82A IT2241682A IT1155361B IT 1155361 B IT1155361 B IT 1155361B IT 22416/82 A IT22416/82 A IT 22416/82A IT 2241682 A IT2241682 A IT 2241682A IT 1155361 B IT1155361 B IT 1155361B
- Authority
- IT
- Italy
- Prior art keywords
- proteins
- chromium
- waste
- tannery waste
- give
- Prior art date
Links
- 102000004169 proteins and genes Human genes 0.000 title abstract 5
- 108090000623 proteins and genes Proteins 0.000 title abstract 5
- 239000002699 waste material Substances 0.000 title abstract 5
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 238000000034 method Methods 0.000 abstract 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract 2
- 229910052804 chromium Inorganic materials 0.000 abstract 2
- 239000011651 chromium Substances 0.000 abstract 2
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 229920001184 polypeptide Polymers 0.000 abstract 2
- 102000004196 processed proteins & peptides Human genes 0.000 abstract 2
- 108090000765 processed proteins & peptides Proteins 0.000 abstract 2
- 239000003513 alkali Substances 0.000 abstract 1
- 230000015556 catabolic process Effects 0.000 abstract 1
- 235000015217 chromium(III) sulphate Nutrition 0.000 abstract 1
- 239000011696 chromium(III) sulphate Substances 0.000 abstract 1
- 239000002537 cosmetic Substances 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 abstract 1
- 230000007062 hydrolysis Effects 0.000 abstract 1
- 238000006460 hydrolysis reaction Methods 0.000 abstract 1
- 150000004679 hydroxides Chemical class 0.000 abstract 1
- 239000004576 sand Substances 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
Landscapes
- Peptides Or Proteins (AREA)
- Cosmetics (AREA)
Abstract
Chromium and proteins are extracted from tannery waste by the following process: the waste is mechanically broken down and treated with alkali to effect hydrolysis, iron filings are partially sepd., the alkaline suspension is filtered under vacuum to separate soluble polypeptides from insoluble chromium hydroxide, and these are purified separately. The polypeptides give high purity proteins and the chromium is obtd. as basic chromium sulphate suitable for use in tanning. Specifically the physical breakdown of tannery waste gives a prod. of millimetric size, and this is treated with Na, K, or Ca hydroxides, pref. at pH 11-12.5 and at a temp. of 95 deg.C or above, for a few minutes. Iron filings and abrasive sand, used in the tanning process, are allowed to settle, and the liq. decanted. This liq. is then filtered to give a chromium hydroxide residue and a filtrate contg. soluble proteins. The process overcomes the difficulties of disposing of tannery waste. The proteins may be used in animal feeds, foliar fertilisers, cosmetics, and for industrial use generally.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT22416/82A IT1155361B (en) | 1982-07-16 | 1982-07-16 | Treatment of tannery waste to give chromium sulphate and proteins |
| GB8300394A GB2118559B (en) | 1982-02-02 | 1983-01-07 | Process for extracting protein and chromium from chrome tanned hide wastes |
| CA000419496A CA1198260A (en) | 1982-02-02 | 1983-01-14 | Extraction of protein and chromium from tannery wastes |
| FR8301186A FR2520641B1 (en) | 1982-02-02 | 1983-01-26 | PROCESS FOR THE EXTRACTION OF PROTEINS AND CHROMIUM FROM WASTE OF CHROME-TANNED SKIN AND PRODUCTS, PROTEIN AND CHROMIUM SULFATE OBTAINED BY THIS PROCESS |
| ES519574A ES519574A0 (en) | 1982-02-02 | 1983-01-27 | PROCEDURE FOR THE EXTRACTION OF PROTEINS AND CHROME FROM THE WASTE OF SKIN CURED FROM CHROME. |
| US06/461,501 US4483829A (en) | 1982-02-02 | 1983-01-27 | Process for recovering proteins and chromium from chrome-tanning waste |
| BR8300450A BR8300450A (en) | 1982-02-02 | 1983-01-31 | PROCESS FOR EXTRACTION OF CHROME AND PROTEINS FROM LIQUID RESIDUES |
| IN150/CAL/83A IN159873B (en) | 1982-02-02 | 1983-02-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT22416/82A IT1155361B (en) | 1982-07-16 | 1982-07-16 | Treatment of tannery waste to give chromium sulphate and proteins |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| IT8222416A0 IT8222416A0 (en) | 1982-07-16 |
| IT8222416A1 IT8222416A1 (en) | 1984-01-16 |
| IT1155361B true IT1155361B (en) | 1987-01-28 |
Family
ID=11196008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT22416/82A IT1155361B (en) | 1982-02-02 | 1982-07-16 | Treatment of tannery waste to give chromium sulphate and proteins |
Country Status (1)
| Country | Link |
|---|---|
| IT (1) | IT1155361B (en) |
-
1982
- 1982-07-16 IT IT22416/82A patent/IT1155361B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT8222416A0 (en) | 1982-07-16 |
| IT8222416A1 (en) | 1984-01-16 |
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