US1845341A - Tanning of fur skins - Google Patents
Tanning of fur skins Download PDFInfo
- Publication number
- US1845341A US1845341A US537487A US53748731A US1845341A US 1845341 A US1845341 A US 1845341A US 537487 A US537487 A US 537487A US 53748731 A US53748731 A US 53748731A US 1845341 A US1845341 A US 1845341A
- Authority
- US
- United States
- Prior art keywords
- skins
- tanning
- formaldehyde
- solution
- fur
- 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
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 18
- 239000000243 solution Substances 0.000 description 9
- 239000004133 Sodium thiosulphate Substances 0.000 description 6
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 6
- 235000019345 sodium thiosulphate Nutrition 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000344 soap Substances 0.000 description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Substances OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000001117 sulphuric acid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241000283973 Oryctolagus cuniculus Species 0.000 description 1
- 241001481789 Rupicapra Species 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000037336 dry skin Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
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
- C14C3/16—Chemical tanning by organic agents using aliphatic aldehydes
Definitions
- This invention relates to the tanning of fur skins, and more particularly to the tanning of such skins dehyde solutions.
- the dried pelts are first soaked in water until soft; a small amount of an organic acid such as 0.5 percent of formic or acetic acid may be added to the soaking water to aid the softening. W'hen the skins have become properly softened so that the membrane is loosened and the skins themselves are plump they are worked on a fleshing machine to completely remove the membrane in order that the skins will take the dressing.
- an organic acid such as 0.5 percent of formic or acetic acid
- the skins After flashing the skins are pickled in a salt and sulphuric acid bath consisting, for example, of one pound of salt and one-eighth pound of sulphuric acid per gallon of solution.
- the skins are Worked in this pickle until they are properly tawed, that is, until they have a dry doughy feel after which they are placed in piles to drain.
- the pickled skins are first soaked for a period of about one hour in a 2 percent aqueous solution of sodium thiosulp'hate and then hydroextracted in a centrifugal. They are now ready for the tanning operation proper.
- the tanned skins may also be oiled if desired by using any good fur oil in place or" the glycerine: and salt and then treated as described above. Other after tanning treatments may also be applied. In the treatment as described above, after the dust has been removed from the skins and they have been dried they may be bleached, dyed or otherwise treated for use.
- the process of this invention is applicable to any of the common fur skins and I have found that it has specific value in the'tam nage of rabbit skins or in the preparation of chamois.
- Method of tanning fur skins which comprises pickling the skins and subjecting them to treatment in a tanning bath comprising water, formaldehyde, sodium thiosulphate and soap until the skins become tanned.
- Method of tanning formaldehyde skins which comprises softening, flashing and pickling the skins, treating with a. solution of sodium thiosulphate and then tanning in a solution of water, sodium thiosulphate, formaldehyde and soap.
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)
Description
Patented Feb. 16, 1932 UNITED STATES PATENT] OFFICE AIiLEN ROGERS, 0F BROOKLYN, NEW YORK, ASSIGNOR TO THE ROESSLER & HASSLACHEB CHEMICAL COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE TAN HING- OI' FUR SKINS No Drawing.
This invention relates to the tanning of fur skins, and more particularly to the tanning of such skins dehyde solutions.
Various solutions for tanning to employ the beneficial effects of formaldehyde tannage have been previously proposed, but I have found in general that the tanned skins were not sufficiently soft or'that after tanning with such mixtures such as formaldehyde and alum, on washing the salts would be to a large extent removed and the skins would again become firm. The objects of this invention are to secure a tannage which would give a good leather which would leave the skins in a soft condition and which after washing would not become hard. I have discovered that if the tanning solution be composed of water, formaldehyde, sodium thiosulphate and soap the desired beneficial results can be obtained.
' In tanning by my process the dried pelts are first soaked in water until soft; a small amount of an organic acid such as 0.5 percent of formic or acetic acid may be added to the soaking water to aid the softening. W'hen the skins have become properly softened so that the membrane is loosened and the skins themselves are plump they are worked on a fleshing machine to completely remove the membrane in order that the skins will take the dressing.
After flashing the skins are pickled in a salt and sulphuric acid bath consisting, for example, of one pound of salt and one-eighth pound of sulphuric acid per gallon of solution. The skins are Worked in this pickle until they are properly tawed, that is, until they have a dry doughy feel after which they are placed in piles to drain. The pickled skins are first soaked for a period of about one hour in a 2 percent aqueous solution of sodium thiosulp'hate and then hydroextracted in a centrifugal. They are now ready for the tanning operation proper.
The skins are now placed in a drum and milled for about two hours in a solution of sodium thiosulphate, formaldehyde and soap. I have found that a tanning solution consisting of 200 parts by weight of water, 5
Application filed Kay 14,
by'a process involving formal- 1981. .serial 1T0. 537,487.
parts of sodium thiosulphate, 5 parts of U. S. P. formaldehyde and 5 parts of soap, will give the most satisfactory tannage. These exact percentages may be somewhat varied without departing from the scope of this invention. After milling in this tannin solution the skins are hung up and allowe to dry, after which they may be finished in any desirable manner; for example, the dry skins may be dampened back by rubbing a 10 percent salt solution containing 10 percent glycerine on the flesh side; the dampened skins are then placed in piles to sammie and when uniformly damp are milled in hardwood sawdust. The partially dried skins are again milled in fresh clean and dry sawdust until the skins are dry and fluffy, after which the furs are freed from excess dus and finally dried.
The tanned skins may also be oiled if desired by using any good fur oil in place or" the glycerine: and salt and then treated as described above. Other after tanning treatments may also be applied. In the treatment as described above, after the dust has been removed from the skins and they have been dried they may be bleached, dyed or otherwise treated for use.
The process of this invention is applicable to any of the common fur skins and I have found that it has specific value in the'tam nage of rabbit skins or in the preparation of chamois.
Claims:
1. Method of tanning fur skins which comprises pickling the skins and subjecting them to treatment in a tanning bath comprising water, formaldehyde, sodium thiosulphate and soap until the skins become tanned.
2. Method of tanning formaldehyde skins which comprises softening, flashing and pickling the skins, treating with a. solution of sodium thiosulphate and then tanning in a solution of water, sodium thiosulphate, formaldehyde and soap.
Si ned at Brooklyn in the county of Kings and tate of New York, this 12th day of May,
ALLEN ROGERS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US537487A US1845341A (en) | 1931-05-14 | 1931-05-14 | Tanning of fur skins |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US537487A US1845341A (en) | 1931-05-14 | 1931-05-14 | Tanning of fur skins |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1845341A true US1845341A (en) | 1932-02-16 |
Family
ID=24142858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US537487A Expired - Lifetime US1845341A (en) | 1931-05-14 | 1931-05-14 | Tanning of fur skins |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1845341A (en) |
-
1931
- 1931-05-14 US US537487A patent/US1845341A/en not_active Expired - Lifetime
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