US1678998A - Process of tanning hides - Google Patents
Process of tanning hides Download PDFInfo
- Publication number
- US1678998A US1678998A US746248A US74624824A US1678998A US 1678998 A US1678998 A US 1678998A US 746248 A US746248 A US 746248A US 74624824 A US74624824 A US 74624824A US 1678998 A US1678998 A US 1678998A
- Authority
- US
- United States
- Prior art keywords
- tanning
- tar
- product
- acid solution
- aliphatic
- 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 5
- 239000011269 tar Substances 0.000 description 12
- 239000002253 acid Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- 238000006277 sulfonation reaction Methods 0.000 description 7
- 125000001931 aliphatic group Chemical group 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000003077 lignite Substances 0.000 description 4
- 238000003763 carbonization Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 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
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000004508 fractional distillation Methods 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 239000002641 tar oil 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
- C14C3/24—Chemical tanning by organic agents using lignin derivatives, e.g. sulfate liquor
Definitions
- This invention relates to the use of artificial tanning materials in tannery and consists in the valuable discovery that sulfonic acids obtained from lignite tar which is pro- 5 quizd by the carbonization of lignite at low temperatures, or from low temperaturecarbonization tar from other rarities of coal, which products may be comprised by the term aliphatic tars, or from fractions thereof, have very good tanning propertiesv and may be applied for treating hides or skins either alone or in conjunction with natural or other usual tanning materials.
- the leather thus obtained has very good properties, especially good body and.
- Example 1 3 parts of a tar oil obtained from lignite (brown coal) tar by fractional distillation and by separating solid paratfin bycooling,
- Example 2 4 parts of low temperature carbonization bonate. It is then ready for tanning which is done in a slightly acidulated and diluted thick tar and from 5 to 6 parts of monohydratic sulfuric acid are vigorously stirred for several hours at a moderately elevated temperature. The sulfonation mixture is worked up as described in Example 1 and the product can be used for tanning in the usual manner employing it in a dilute slightly acid aqueous solution. The product may be used either alone 'or in mixture with other tanning substances.
- the process of tanning .wZhich consists in treating hides with a slightly acid solution containing a sulfonation product of an aliphatic tar.
- a new tanning composition a slight 1y acid solution containing a product ob' tained oy-the sulfonatio-n of the distillation so products of low temperature carbonization tars.
Description
Patented July 31, 1928 UNITED-STATES KURT H. MEYER AND HERMAN N SCHlI TTTE, OF MANNHEIM, GERMANY, ASSIGNORS To I. G. FARBENINDUSTRIE AKTIENGESELLSCHAFT, OF FRANKFORT-ON-THE-MAIN,
GETtMANY.
PROCESS OF TANNING RIDES.
No Drawing. Application filed October 27, 1924, Serial No. 746,248, and in Germany November 14, 1923.
This invention relates to the use of artificial tanning materials in tannery and consists in the valuable discovery that sulfonic acids obtained from lignite tar which is pro- 5 duced by the carbonization of lignite at low temperatures, or from low temperaturecarbonization tar from other rarities of coal, which products may be comprised by the term aliphatic tars, or from fractions thereof, have very good tanning propertiesv and may be applied for treating hides or skins either alone or in conjunction with natural or other usual tanning materials. The leather thus obtained has very good properties, especially good body and.
Example 1. 3 parts of a tar oil obtained from lignite (brown coal) tar by fractional distillation and by separating solid paratfin bycooling,
, is mixed with from 3 to 4 parts of concen-' trated sulfuric acid of 66 degrees Baum and the mixture is vigorously stirred at a'moderately raised temperature. After a While, the mixture is poured into ice water and the un altered oil separated from the acid .solu
tion, which latter is'neutralized with lime,
filtered and decomposed with sodium carsolution.
I Ewample 2. 4 parts of low temperature carbonization bonate. It is then ready for tanning which is done in a slightly acidulated and diluted thick tar and from 5 to 6 parts of monohydratic sulfuric acid are vigorously stirred for several hours at a moderately elevated temperature. The sulfonation mixture is worked up as described in Example 1 and the product can be used for tanning in the usual manner employing it in a dilute slightly acid aqueous solution. The product may be used either alone 'or in mixture with other tanning substances.
\Vhat we claim is: a
1. The process of tanning .wZhich consists in treating hides with a slightly acid solution containing a sulfonation product of an aliphatic tar.
2. The process of tanning which consists in treating hides with a slightly acid solution of a sulfonation product of a fraction of-an aliphatic tar. I
3. The process of tanning which consists in treating hides with a slightly acid solution containing a sulfonation product of an aliphatic tar and a usual tanning material.
4. Asa new tanning composition a slight 1y acid solution containing a sulfonation product of an aliphatic tar. I
5. As anew tanning composition a slightly acid solution containlng a sulfonation product of a-fraction of an aliphatic tar.
6. As a new tanning composition a slightly acid solution of a sulfonat-ion product of 7 an 1aliphatic tar and a usual tanning matcria 7. As a new tanning composition a slight 1y acid solution containing a product ob' tained oy-the sulfonatio-n of the distillation so products of low temperature carbonization tars.
In testimony whereof we. have hereunto set our hands.
' .KURT H MEYER: HERMANN soHUTTE.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1678998X | 1923-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1678998A true US1678998A (en) | 1928-07-31 |
Family
ID=7739149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US746248A Expired - Lifetime US1678998A (en) | 1923-11-14 | 1924-10-27 | Process of tanning hides |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1678998A (en) |
-
1924
- 1924-10-27 US US746248A patent/US1678998A/en not_active Expired - Lifetime
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