US313177A - Manufacture of tanning extract - Google Patents
Manufacture of tanning extract Download PDFInfo
- Publication number
- US313177A US313177A US313177DA US313177A US 313177 A US313177 A US 313177A US 313177D A US313177D A US 313177DA US 313177 A US313177 A US 313177A
- Authority
- US
- United States
- Prior art keywords
- liquor
- manufacture
- acid
- steam
- tanning extract
- 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
- 239000000284 extract Substances 0.000 title description 10
- 238000004519 manufacturing process Methods 0.000 title description 10
- LSNNMFCWUKXFEE-UHFFFAOYSA-N sulfonic acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
-
- 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
- C14C3/10—Vegetable tanning
- C14C3/12—Vegetable tanning using purified or modified vegetable tanning agents
Definitions
- My invention relates to the manufacture of tanning extract from bark; and it consists in the improved process of evaporating the liquor, as hereinafter more fully described and claimed.
- the liquor is contained in a vacuum-pan of any desired construction having a condenser, and a stream of a mixture of carbonic-acid and sulphurousacid gases and steam isintroduced through the liquor.
- the carbonic-acid and sulphurous-acid gases are continued to be introduced through the liquor,while the steam is stopped, and only admitted at times, when, at a later stage of the evaporation, the liquor becomes so thick as to prevent the gases from passing freely through itand clog the passage up through which the said steam passes, thus serving to clear the passage.
- the carbonic acid being heavier than the air, will remain in a layer over the liquor after having carried the air contained in the liquor off by passing through it, thus preventing the air from reaching the liquor after having once been driven ofi, and the sulphurous acid will prevent OX- idation of the liquor by the air, and by combining with the air it will form sulphuric acid, which will serve to improve the liquor, although only appearing in a very small proportion.
- the result or product is a dry substance of a red color, which may be dissolved in Water and reproduce the original tau-liquor.
- tanning extracts which consists in passing carbonic-acid and sulphurous-acid gases and steam through the bark-liquor contained in a common vaouumpan, thereupon shutting off the steam, and at intervals introducing small quantities of steam, as and for the purpose shown and set forth.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Extraction Or Liquid Replacement (AREA)
Description
UNITED STATES PATENT OFFICE.
THEODORE FREDERIGK COLIN, OF BODINE, PENNSYLVANIA.
MANUFACTURE OF TANNING EXTRACT.
SPEGIFICATION forming part of Letters Patent No. 313,177, dated March 3,1885.
Application filed July 8, 1884. (No specimens.)
To all whom it may concern.-
Be it known that I, THEODORE F. COLIN, a citizen of the United States, and a resident of Bodine, in the county ofLycoming and State of Pennsylvania, have invented certain new and useful Improvements in the Manufacture of Tanning Extracts; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.
My invention relates to the manufacture of tanning extract from bark; and it consists in the improved process of evaporating the liquor, as hereinafter more fully described and claimed. In this .process the liquor is contained in a vacuum-pan of any desired construction having a condenser, and a stream of a mixture of carbonic-acid and sulphurousacid gases and steam isintroduced through the liquor. After the steam has assisted in heating the liquor the carbonic-acid and sulphurous-acid gases are continued to be introduced through the liquor,while the steam is stopped, and only admitted at times, when, at a later stage of the evaporation, the liquor becomes so thick as to prevent the gases from passing freely through itand clog the passage up through which the said steam passes, thus serving to clear the passage. The carbonic acid, being heavier than the air, will remain in a layer over the liquor after having carried the air contained in the liquor off by passing through it, thus preventing the air from reaching the liquor after having once been driven ofi, and the sulphurous acid will prevent OX- idation of the liquor by the air, and by combining with the air it will form sulphuric acid, which will serve to improve the liquor, although only appearing in a very small proportion. After the liquor has been evaporated the result or product is a dry substance of a red color, which may be dissolved in Water and reproduce the original tau-liquor.
I am aware that sulphurous acid has been used for the purpose of digesting bark for tanliquors, and I am also aware that tan-liquor has been evaporated in vacuum -pans, and I do not wish to make any broad claims either for the process of using sulphurous acid in the manufacture of tan-liquor, nor for the old and well-known process of evaporating liquids in a vacuum-pan; but
I claim I The process of making tanning extracts which consists in passing carbonic-acid and sulphurous-acid gases and steam through the bark-liquor contained in a common vaouumpan, thereupon shutting off the steam, and at intervals introducing small quantities of steam, as and for the purpose shown and set forth.
In testimony that I claim the foregoing as my own I have hereunto affixed my signature in presence of two witnesses.
THEODORE FREDERICK COLIN.
Vitnesses:
AUGUST PETERSON, D. E. MOELHINNY.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US313177A true US313177A (en) | 1885-03-03 |
Family
ID=2382328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US313177D Expired - Lifetime US313177A (en) | Manufacture of tanning extract |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US313177A (en) |
-
0
- US US313177D patent/US313177A/en not_active Expired - Lifetime
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