US1940610A - Method of mineral tanning - Google Patents
Method of mineral tanning Download PDFInfo
- Publication number
- US1940610A US1940610A US652687A US65268733A US1940610A US 1940610 A US1940610 A US 1940610A US 652687 A US652687 A US 652687A US 65268733 A US65268733 A US 65268733A US 1940610 A US1940610 A US 1940610A
- Authority
- US
- United States
- Prior art keywords
- lbs
- tanning
- zirconium
- solution
- salts
- 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
- 238000000034 method Methods 0.000 title description 17
- 229910052500 inorganic mineral Inorganic materials 0.000 title description 6
- 239000011707 mineral Substances 0.000 title description 6
- 239000000243 solution Substances 0.000 description 27
- 150000003839 salts Chemical class 0.000 description 21
- 239000010985 leather Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 12
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical class [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 12
- 229910052726 zirconium Inorganic materials 0.000 description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 10
- 150000003754 zirconium Chemical class 0.000 description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical class [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 235000010755 mineral Nutrition 0.000 description 5
- 239000011780 sodium chloride Substances 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 229910021653 sulphate ion Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical class [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 239000010936 titanium Chemical class 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N Gluconic acid Natural products OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical class [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000011696 chromium(III) sulphate Substances 0.000 description 2
- 235000015217 chromium(III) sulphate Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000174 gluconic acid Substances 0.000 description 2
- 235000012208 gluconic acid Nutrition 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010697 neat foot oil Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- OERNJTNJEZOPIA-UHFFFAOYSA-N zirconium nitrate Chemical compound [Zr+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O OERNJTNJEZOPIA-UHFFFAOYSA-N 0.000 description 2
- XJUNLJFOHNHSAR-UHFFFAOYSA-J zirconium(4+);dicarbonate Chemical compound [Zr+4].[O-]C([O-])=O.[O-]C([O-])=O XJUNLJFOHNHSAR-UHFFFAOYSA-J 0.000 description 2
- ZXAUZSQITFJWPS-UHFFFAOYSA-J zirconium(4+);disulfate Chemical compound [Zr+4].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZXAUZSQITFJWPS-UHFFFAOYSA-J 0.000 description 2
- IULJSGIJJZZUMF-UHFFFAOYSA-N 2-hydroxybenzenesulfonic acid Chemical compound OC1=CC=CC=C1S(O)(=O)=O IULJSGIJJZZUMF-UHFFFAOYSA-N 0.000 description 1
- 208000002874 Acne Vulgaris Diseases 0.000 description 1
- 241001070941 Castanea Species 0.000 description 1
- 235000014036 Castanea Nutrition 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 235000017343 Quebracho blanco Nutrition 0.000 description 1
- 241000065615 Schinopsis balansae Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical class [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical class [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 206010000496 acne Diseases 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229940000425 combination drug Drugs 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 239000010703 silicon Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 239000011135 tin Chemical class 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- DUNKXUFBGCUVQW-UHFFFAOYSA-J zirconium tetrachloride Chemical compound Cl[Zr](Cl)(Cl)Cl DUNKXUFBGCUVQW-UHFFFAOYSA-J 0.000 description 1
- IPCAPQRVQMIMAN-UHFFFAOYSA-L zirconyl chloride Chemical compound Cl[Zr](Cl)=O IPCAPQRVQMIMAN-UHFFFAOYSA-L 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
- C14C3/04—Mineral tanning
Definitions
- This invention relates to a new method of mineral tanning.
- salts of zirconium can be used to produce stable white leather resistant to prolonged washing and to hot water, which has a different character to that produced with other mineral salts such as magnesium or titanium.
- zirconium salts such as the sul phate
- water soluble salts of zirconium can be utilized, such as the chloride, nitrate, or sulphate, though the sulphate appears to be the most suitable for development on a practical scale.
- the whitest leather results from the use of a solution of the to pure sulphate, but good leather may besecured even if a technical product is utilized.
- a still milder neutralizing action can be secured by adding a small amount of an organic acid such as gluconic acid to the solution before commencing the addition of the alkali.
- zirconium salts in tanning Another important method of use of zirconium salts in tanning is to apply them in conjunction with suitable synthetic tanning agents. In this way white leather with different characteristics may 7 be obtained dependent on the nature of the synthetic tanning agent selected. It is also possible to use zirconium salts in conjunction with the vetgetable tannins.
- a solution of zirconium sulphate containing 20% ZlOz was usedto tan pickled sheepskin as follows: 100 lbs, pickled sheepskin showing pI-I less than 2 was drummed in 300 lbs. of 5% solution of sodium chloride, and 35 lbs. of tanning solution added in one feed. After drumming for 6 hours the skins felt tanned. The liquor was drained, and the skins washed with water until a pH of 4 /2 was reached, then dried out. By rewetting and staking good white leather was obtained.
- a solution of zirconium chloride was prepared by dissolving basic zirconium carbonate in an amount of concentrated hydrochloric acid calculated to give ZIOClz, and diluting to a solution containing theequivalent of 20% ZrOz.
- a solution of zirconium nitrate was prepared in a manner similar to the chloride by dissolving basic zirconium carbonate in nitric acid and di- 105 luting to a solution containing the equivalent of 20% ZrOz.
- a process of tanning consisting in the application of water soluble salts of zirconium to hide or skin.
- a process of tanning consisting in the application of Water soluble salts of zirconium to pickled skin, with subsequent washing to remove free acid.
- a process of tanning consisting in the application of water soluble salts of zirconium to pickled skin, with subsequent addition of a mild alkali to neutralize free acid.
- a process of tanning consisting in the application of a solution of zirconium sulphate to pickled skin, with subsequent neutralization of free acid.
- a process of tanning consisting in the application of a solution of zirconyl chloride to pickled skin with subsequent neutralization of free acid.
- a process of tanning consisting in the application to hide or skin of water soluble salts of zirconium in conjunction with salts of chromium.
- a process of tanning consisting in the application to hide or-skin of water soluble salts of zirconium in conjunction with salts of aluminum.
- a process of tanning consisting in the application to hide or skin partially tanned with formaldehyde, of water soluble salts of zirconium.
- a process of tanning consisting in the application to hide or skin of water soluble salts of zirconium in conjunction with synethetic tanning agents.
- a process of tanning consisting in the application to hide or skin partially tanned with vegetable tanning materials, of water soluble salts of zirconium.
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 Dec. 19, 1933 PATENT OFFICE METHOD OF MINERAL TANNING Ian 0. Somerville, Fox Chase, Pa., assignor to Rohm & Haas Company, Inc., Philadelphia,
No Drawing. Application January 20, 1933 Serial No. 652,687
10 Claims.
This invention relates to a new method of mineral tanning.
The earliest mineral salt to be used in the conversion of raw skin into leather was alum, and it this tannage is still used to some extent in the manufacture of white leather. It has the disadvantage that the leather is not stable against prolonged washing nor resistant to hot water. An improvementv in both these respects was effected in the introduction of salts of chromium as tanning agents, and this process is universally used where a stable tannage resistant to hot water is desired. Leather made in this way, however, has a greenish blue color, and it is extremely difiicult to modify this tannage to give white leather. Consequently other mineral salts have been tried in an endeavor to give a stable tannage which would have a white color, and patents have been taken out covering the use of salts of magnesium, silicon, titanium, tin and others.
I have now discovered that the salts of zirconium can be used to produce stable white leather resistant to prolonged washing and to hot water, which has a different character to that produced with other mineral salts such as magnesium or titanium.
Whereas it is diflicult to secure tannage with titanium salts, zirconium salts, such as the sul phate, of considerable range of basicity have now been found to combine readily with pickled skin, even in quite acid condition. The method of procedure is illustrated in the examples set out below. In general it may be said that water soluble salts of zirconium can be utilized, such as the chloride, nitrate, or sulphate, though the sulphate appears to be the most suitable for development on a practical scale. The whitest leather results from the use of a solution of the to pure sulphate, but good leather may besecured even if a technical product is utilized. This may contain traces of iron or titanium, but these do not produce an appreciable effect on the quality of the leather. The range of basicity allowable 5 at the time of application to the skin is considerable, but I prefer to apply the zirconium salt in stronglyacid condition, and neutralize all excess of acid by'washing or addition of mild alkalies.
A still milder neutralizing action can be secured by adding a small amount of an organic acid such as gluconic acid to the solution before commencing the addition of the alkali.
As a further development of this invention I have found it possible to utilize the salts of zirconium in conjunction with other standard types of tannage. For example it is possible to effect a combination tannage with salts of zirconium and chromium. The zirconium salts may be applied first, and followed by chromium, or a chrome tannage may be modified by subsequent treatment with zirconium salts. A similar combina-- tion tannage can be carried out with aluminum and zirconium salts. Further it is possible to improve the character of formaldehyde-tanned leather by application of zirconium salts after $5 the formaldehyde has been taken up. Another important method of use of zirconium salts in tanning is to apply them in conjunction with suitable synthetic tanning agents. In this way white leather with different characteristics may 7 be obtained dependent on the nature of the synthetic tanning agent selected. It is also possible to use zirconium salts in conjunction with the vetgetable tannins.
The following examples illustrate the different 35 types of tannage in which zirconium salts may be utilized, but it is understood that the invention is in no way confined to these examples:
1. A solution of zirconium sulphate containing 20% ZlOz was usedto tan pickled sheepskin as follows: 100 lbs, pickled sheepskin showing pI-I less than 2 was drummed in 300 lbs. of 5% solution of sodium chloride, and 35 lbs. of tanning solution added in one feed. After drumming for 6 hours the skins felt tanned. The liquor was drained, and the skins washed with water until a pH of 4 /2 was reached, then dried out. By rewetting and staking good white leather was obtained.
2.- A solution of zirconium chloride was prepared by dissolving basic zirconium carbonate in an amount of concentrated hydrochloric acid calculated to give ZIOClz, and diluting to a solution containing theequivalent of 20% ZrOz.
100 lbs. pickled sheepskin showing pH 2 /4 was drummed in 250 lbs. 10% solution of sodium chloride and 25 lbs. of tanning solution added in 3 feeds at half hour intervals. Drummed 2 hours, lay overnight in liquor, then a solution of sodium bicarbonate added in successive portions 100 till a pH of over 4 was reached. Skins were washed well, and dried out.
3. A solution of zirconium nitrate was prepared in a manner similar to the chloride by dissolving basic zirconium carbonate in nitric acid and di- 105 luting to a solution containing the equivalent of 20% ZrOz.
100 lbs. pickled sheepskin showing pH 2 was drummed in 300 lbs. 10% solution of sodium chloride and 30 lbs. of tanning solution added in 5 1 10 feeds at /2 hour intervals. Drummed four hours after the last addition. The liquor was drained, and the skins drummed in 300 lbs. of 5% salt solution to which was added 3 lbs. gluconic acid, then a solution of borax in successive feeds until a pH of 5 was reached. The skin's'were washed, then fatliquored with 5 lbs. sulphonated cocoanut oil and dried out.
4. (a) 100 lbs. of calfskins were taken in the pickled condition and given 6 lbs. of a one third basic chromium sulphate, then 5 lbs. of the tanning solution described in Example 1. After drumming for 5 hours, the skins were neutralized to pH 4, washed well, fatliquored with 5 lbs. sulphonated neats-foot oil, and dried out.
(1)) 100 lbs. of calfskins were taken in the pickled condition and given 10 lbs. of the tanni solution described in Example 1. After drumming 3 hours, sodium carbonate was added until a pH of 3% was reached, then 3 lbs. of acne third basic chromium sulphate added. After drumming 2 hours sodium carbonate was added very slowly until a pH of 4 was reached, and the skins allowed to lie in the liquor overnight. In the morning they were processed as is customary for chrome tanned calfskin and gave good leather of bluish white color.
5. 100 lbs. of pickled sheepskins were drummed in 300 lbs. of 5% solution of sodium chloride, and given 20 lbs. of the tanning solution described in Example 1. Drummed for 4 hours, drained, and in a fresh liquor of 5% salt given 8 lbs. of aluminum sulphate. Drummed 4 hours, allowed to lie in liquor overnight, and next day sodium bicarbonate added in successive feeds until a pH of 4 was reached. Skins were rinsed, fatliquored with a mixture of 4 lbs. neats-foot oil and 3 lbs. Ivory soap, and dried out.
6. 100 lbs. of bated kidskins were given a light pickle with sulfuric acid and salt. then treated with 10 lbs. of a 37% solution of formaldehyde. Drummed for 3 hours, then neutralized to a pH of 7 and allowed to lie in the liquor overnight. Next day given 5 lbs. of the tanning solution described in Example 2, drummed for 3 hours, then washed until a pH of 4% was reached, fatliquored as in Example 5, and dried out.
'5. 100 lbs. of pickled calfskins showing pH of 2 were drummed with 300 lbs. of a 5% solution of sodium chloride and 20 lbs. of the tanning solution described in Example 1 added. Drummed for 4 hours, then neutralized with sodium bicarbonate to a pH of 3 Liquor was drained and the skins rinsed lightly, and divided into 4 parts. In fresh salt solution 5 lbs. of solutions of various synthetic tanning agents were added:
(a) Consisting of the product of condensation of phenol sulphonic acid and formaldehyde;
(b) Consisting of the product of sulphonation of the viscous resinous liquid produced by condensation of phenol with acetaldehyde;
(0) Consisting of the product of condensation of naphthalene sulphonic acid and formaldehyde;
(d) Consisting of the product of sulphonation of 4.4-dihydroxydiphenyldimethylmethane.
After drumming with the synthetic tanning agent for 3 hours, the skins were washed well, fatliquored, and dried out.
8. 100 lbs. of side leather which had been tanned by slow addition of a blend of quebracho and chestnut extracts was treated towards the conclusion of tannage with 5 lbs. of the tanning solution described in Example 1. After washing well, the skins were fatliquored, and dried out in the usual way.
The above examples illustrate several embodiments of the invention, but wide deviation is possible without departing from the spirit of the invention, the scope of which is limited only by the following claims:
What I claim is:
1. A process of tanning consisting in the application of water soluble salts of zirconium to hide or skin.
2. A process of tanning consisting in the application of Water soluble salts of zirconium to pickled skin, with subsequent washing to remove free acid.
3. A process of tanning consisting in the application of water soluble salts of zirconium to pickled skin, with subsequent addition of a mild alkali to neutralize free acid.
4. A process of tanning consisting in the application of a solution of zirconium sulphate to pickled skin, with subsequent neutralization of free acid.
5. A process of tanning consisting in the application of a solution of zirconyl chloride to pickled skin with subsequent neutralization of free acid.
6. A process of tanning consisting in the application to hide or skin of water soluble salts of zirconium in conjunction with salts of chromium.
7. A process of tanning consisting in the application to hide or-skin of water soluble salts of zirconium in conjunction with salts of aluminum.
8. A process of tanning consisting in the application to hide or skin partially tanned with formaldehyde, of water soluble salts of zirconium.
9. A process of tanning consisting in the application to hide or skin of water soluble salts of zirconium in conjunction with synethetic tanning agents.
10. A process of tanning consisting in the application to hide or skin partially tanned with vegetable tanning materials, of water soluble salts of zirconium.
IAN C. SOMERVILLE.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US652687A US1940610A (en) | 1933-01-20 | 1933-01-20 | Method of mineral tanning |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US652687A US1940610A (en) | 1933-01-20 | 1933-01-20 | Method of mineral tanning |
Publications (1)
Publication Number | Publication Date |
---|---|
US1940610A true US1940610A (en) | 1933-12-19 |
Family
ID=24617754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US652687A Expired - Lifetime US1940610A (en) | 1933-01-20 | 1933-01-20 | Method of mineral tanning |
Country Status (1)
Country | Link |
---|---|
US (1) | US1940610A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1257353B (en) * | 1965-03-26 | 1967-12-28 | Bayer Ag | Method of tanning |
US5630846A (en) * | 1992-01-27 | 1997-05-20 | Daikin Industries Ltd. | Agent for treating textile, method for treating textile and treated textile |
-
1933
- 1933-01-20 US US652687A patent/US1940610A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1257353B (en) * | 1965-03-26 | 1967-12-28 | Bayer Ag | Method of tanning |
US5630846A (en) * | 1992-01-27 | 1997-05-20 | Daikin Industries Ltd. | Agent for treating textile, method for treating textile and treated textile |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3104151A (en) | Combination tannage with tetrakis (hydroxy-methyl) phosphonium chloride and a phenol | |
JPS6284200A (en) | Production of fish skin | |
US3901929A (en) | Wet processing of leather | |
US1940610A (en) | Method of mineral tanning | |
US4715861A (en) | Economy chrome tanning process with aldehyde-acids and keto-acids | |
EP0533011B1 (en) | Process for producing chrome-tanned leather | |
US4919680A (en) | High-extraction chrome tanning process | |
US3174817A (en) | Chrome-acetate complex tannage | |
US2316740A (en) | Leather manufacture | |
US2264414A (en) | Tanning with complex basic zirconium sulphates | |
US4938779A (en) | Chrome tanning of leather with reduced waste of chromium | |
US4211529A (en) | Chrome-tanning | |
US2127304A (en) | Tanning | |
US3960481A (en) | Process for tanning leather | |
US2732278A (en) | Tanning with tetrakis- | |
US1985439A (en) | Method of chrome tanning of leather | |
US4327997A (en) | Chrome utilization in chrome tanning | |
US2115562A (en) | Method of tanning skins | |
US2009255A (en) | Method of tanning leather and the leather produced by said method | |
US3493318A (en) | Tanning composition made from a basic chrome sulfate and a tris(hydroxyacetato)chromiate | |
US2195715A (en) | Composition and process for making leather | |
US2322959A (en) | Tanning | |
US3395175A (en) | Condensation products of formaldehyde and phenolic compounds useful for tanning | |
US3617186A (en) | Tanning with tris(hydroxymethyl)nitromethane and a polyhydric phenol | |
US2955013A (en) | Process for tanning leather with waterinsoluble condensation product of a phenol, formaldehyde, and carboxylic acid |