GB716664A - Tanning materials and process for their recovery from the waste liquors obtained by the digestion of wood from deciduous trees for the manufacture of chemical woodpulp - Google Patents
Tanning materials and process for their recovery from the waste liquors obtained by the digestion of wood from deciduous trees for the manufacture of chemical woodpulpInfo
- Publication number
- GB716664A GB716664A GB13283/52A GB1328352A GB716664A GB 716664 A GB716664 A GB 716664A GB 13283/52 A GB13283/52 A GB 13283/52A GB 1328352 A GB1328352 A GB 1328352A GB 716664 A GB716664 A GB 716664A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- wood
- tanning materials
- solution
- digestion
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0007—Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for
-
- 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)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Fats And Perfumes (AREA)
- Artificial Filaments (AREA)
Abstract
Tanning materials are produced by adding to the waste liquors from the sulphite digestion of the wood of deciduous trees, especially beech, hot concentrated viscose spinning bath wastes containing alkali metal sulphates, separating calcium sulphate, reacting the solution with cation exchangers in the hydrogen form, concentrating and heating to 150 DEG C. the solution now containing free ligneous acids, particularly sulphonic acids, adding stabilizers, e.g. 2 per cent naphthalene sulphonic acids or their homologues, and finally atomizing the solution, when the solids content is 40-60 per cent by weight, e.g. by a rotating disc, in a drying tower to produce a voluminous powder. The hygroscopicity of the powder may be reduced by adding 0.2 per cent turkey red oil. The tanning materials may be dissolved in water and dialyzed through a viscose membrane.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT716664X | 1951-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB716664A true GB716664A (en) | 1954-10-13 |
Family
ID=3679784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13283/52A Expired GB716664A (en) | 1951-05-28 | 1952-05-26 | Tanning materials and process for their recovery from the waste liquors obtained by the digestion of wood from deciduous trees for the manufacture of chemical woodpulp |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB716664A (en) |
-
1952
- 1952-05-26 GB GB13283/52A patent/GB716664A/en not_active Expired
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