GB171136A - Improved process for obtaining tanning materials from cellulose waste sulphite lyes - Google Patents
Improved process for obtaining tanning materials from cellulose waste sulphite lyesInfo
- Publication number
- GB171136A GB171136A GB1915420A GB1915420A GB171136A GB 171136 A GB171136 A GB 171136A GB 1915420 A GB1915420 A GB 1915420A GB 1915420 A GB1915420 A GB 1915420A GB 171136 A GB171136 A GB 171136A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tanning
- lime
- calcium carbonate
- waste sulphite
- alkali
- 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
- C14C3/08—Chemical tanning by organic agents
- C14C3/24—Chemical tanning by organic agents using lignin derivatives, e.g. sulfate liquor
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Waste sulphite-cellulose lye is treated with lime or calcium carbonate to neutralize the acids, and is separated from the precipitate. The calcium is then precipitated by alkali compounds such as sodium carbonate or silicate. Hydrochloric, sulphuric, or other acid is added to the resulting solution of sulpho-lignates in amount equivalent to 50-100 per cent of the alkali used in precipitation. The liquid can then be used for tanning. Instead of acid, there may be added salts of metals such as are used in mineral tanning, for instance aluminium, iron, or chromium chloride; the liquids thus obtained can be used directly p for tanning. The liquid may be fermented after the addition of the lime or calcium carbonate, and may be concentrated by evaporation after the treatment with the alkali compound.ALSO:Waste sulphite-cellulose lye is treated with lime or calcium carbonate, to neutralize the acids, and is separated from the precipitate. The calcium is then precipitated by alkali compounds such as sodium carbonate or silicate. Salts of metals such as are used in mineral tanning, for instance aluminium, iron, or chromium chloride, are then added. The liquids thus obtained can be used directly for tanning. The liquid may be fermented after the addition of the lime or calcium carbonate, and may be concentrated by evaporation after the treatment with the alkali compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1915420A GB171136A (en) | 1920-07-07 | 1920-07-07 | Improved process for obtaining tanning materials from cellulose waste sulphite lyes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1915420A GB171136A (en) | 1920-07-07 | 1920-07-07 | Improved process for obtaining tanning materials from cellulose waste sulphite lyes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB171136A true GB171136A (en) | 1921-11-07 |
Family
ID=10124631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1915420A Expired GB171136A (en) | 1920-07-07 | 1920-07-07 | Improved process for obtaining tanning materials from cellulose waste sulphite lyes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB171136A (en) |
-
1920
- 1920-07-07 GB GB1915420A patent/GB171136A/en not_active Expired
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