US1974861A - Production of leather - Google Patents
Production of leather Download PDFInfo
- Publication number
- US1974861A US1974861A US722815A US72281534A US1974861A US 1974861 A US1974861 A US 1974861A US 722815 A US722815 A US 722815A US 72281534 A US72281534 A US 72281534A US 1974861 A US1974861 A US 1974861A
- Authority
- US
- United States
- Prior art keywords
- leather
- tanning
- production
- treatment
- skins
- 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
- 239000010985 leather Substances 0.000 title description 6
- 238000004519 manufacturing process Methods 0.000 title description 4
- 210000003491 skin Anatomy 0.000 description 11
- 239000005018 casein Substances 0.000 description 5
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 5
- 235000021240 caseins Nutrition 0.000 description 5
- 238000005406 washing Methods 0.000 description 4
- 239000003995 emulsifying agent Substances 0.000 description 3
- 239000002425 soil liming agent Substances 0.000 description 3
- 108010010803 Gelatin Proteins 0.000 description 2
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 description 2
- 235000011180 diphosphates Nutrition 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 229940048084 pyrophosphate Drugs 0.000 description 2
- 239000001397 quillaja saponaria molina bark Substances 0.000 description 2
- 229930182490 saponin Natural products 0.000 description 2
- 150000007949 saponins Chemical class 0.000 description 2
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 2
- 229940048086 sodium pyrophosphate Drugs 0.000 description 2
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 235000017709 saponins Nutrition 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
Definitions
- This invention is based on the observation that a pre-treatr'nent of the skins, with a washing and emulsifying agent obtainable according to German Specification No. 506.338 from a pyro- 30 phosphate and glue, gelatin, proteins, saponin,
- Skins which have been prepared in the beamhouse in the usual manner by liming and bating are placed-in water having a temperature of 35-40 C., on the reel or in the drum and moved for 1-1 hours with the addition of 1-1 per cent of a mixture of 2 parts of neutralized sodium pyrophosphate and 1 part of casein. The skins are then washed and tanned in the usual manner.
- the proportion of the mixture of pyrophosphate and casein which is used depends upon the origin of the skins and must be greater the higher the content of the skins in fat.
- casein it may be possible to use in this example any natural, vegetable or animal albumen such as glue, gelatin, a protein, saponin and so on.
- any natural, vegetable or animal albumen such as glue, gelatin, a protein, saponin and so on.
- An improvement in the production of leather consisting in subjecting the skin, in the course of the treatment preparatory to tanning, to a treatment with a solution of a washing and emulsifying agent obtainable from a pyrophosphate and any natural, vegetable or animal albumen.
- An improvement in the production of leather consisting in subjecting the skin, in the course of the treatment preparatory to tanning, to a treatment with a solution of a washing and emulsifying agent obtainable from sodium pyrophosphate and casein.
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)
- Detergent Compositions (AREA)
Description
Patented Sept. 25, 1934 PATENT OFFICE 1,974,861 PRODUCTION OF LEATHER Giorgio Chiera, Torino, Italy, assignor to the firm J. R. Geigy A. G., Basel, Switzerland No Drawing Application April '27, 1934, Serial vNo. 722,815. In Germany May 11, 1933 2 Claims. (Cl. 149-2) As isweli knownv it isj'necessary to subject animal skins, before tanning, to a preparatory treatment for separatingthe epidermis and the under-skin. After liming and after removal of 5 the hair-bearing outer-'layer'the corium is left in a strongly swollen, plump and full condition, in whichit still enclqses residues of the liming agent.- 'If the skin istanned whilst it is in this swollen condition ityields only a poor leatheri ..gl3y bating or drenching, for example,
. with "a fermented infusion {of bran or dung'or even with pure enzymes; the swelling is reduced and the skinbecomesj'flaccid or fallen; whilst it is in this condition the residual impurities,
even those enclosedwithin the skin, can be removed easily by mechanical means.
At the same time the surface of theskin requires the favourable fcondition required for the tanning operation, this being recognized by 29 the slippery feel of the skin. The softness and.--,
suppleness of theleather obtained after tanning is dependent not only on the known specific action of the liming agent. but'also largely on the extent to; which the liming agent and the g5 impurities are removed. 7
This invention is based on the observation that a pre-treatr'nent of the skins, with a washing and emulsifying agent obtainable according to German Specification No. 506.338 from a pyro- 30 phosphate and glue, gelatin, proteins, saponin,
casein and so on, prior to. tanning, is remarkably suitable for the purpose of rendering the leather very soft and supple. If an animal hide which has been prepared for tanning in the usual manner is treated, before or after the hating or drenching operation, in a bath containing a washing and emulsifying preparation obtainable according to the aforesaid specification, there is obtained after tanning a leather which is much softer and more supple than that which is obtained with the aid of the hitherto usual hating processes. Thus a treatment in accordance with the invention may replace the hitherto usual bating processes. The duration of the treatment will vary according to the effect which is desired and according to the concentration of the bath.
The following example illustrates the invention, the parts being by weight:
Skins which have been prepared in the beamhouse in the usual manner by liming and bating are placed-in water having a temperature of 35-40 C., on the reel or in the drum and moved for 1-1 hours with the addition of 1-1 per cent of a mixture of 2 parts of neutralized sodium pyrophosphate and 1 part of casein. The skins are then washed and tanned in the usual manner. The proportion of the mixture of pyrophosphate and casein which is used depends upon the origin of the skins and must be greater the higher the content of the skins in fat.
Instead of casein, it may be possible to use in this example any natural, vegetable or animal albumen such as glue, gelatin, a protein, saponin and so on.
What I claim is:--
1. An improvement in the production of leather. consisting in subjecting the skin, in the course of the treatment preparatory to tanning, to a treatment with a solution of a washing and emulsifying agent obtainable from a pyrophosphate and any natural, vegetable or animal albumen.
2. An improvement in the production of leather, consisting in subjecting the skin, in the course of the treatment preparatory to tanning, to a treatment with a solution of a washing and emulsifying agent obtainable from sodium pyrophosphate and casein.
GIORGIO CHIERA.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEG85519A DE622213C (en) | 1933-05-11 | 1933-05-11 | Process for improving the softness and suppleness of leather |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1974861A true US1974861A (en) | 1934-09-25 |
Family
ID=89942814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US722815A Expired - Lifetime US1974861A (en) | 1933-05-11 | 1934-04-27 | Production of leather |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US1974861A (en) |
| BE (1) | BE403029A (en) |
| DE (1) | DE622213C (en) |
| FR (1) | FR772976A (en) |
| GB (1) | GB433815A (en) |
| NL (1) | NL38797C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1213950B (en) * | 1957-07-17 | 1966-04-07 | Benckiser Gmbh Joh A | Process for tanning hides and skins with chrome tanning agents |
| DE1221394B (en) * | 1960-03-11 | 1966-07-21 | Benckiser Gmbh Joh A | Process for tanning hides and skins with chrome tanning agents |
| DE2930342A1 (en) * | 1979-07-26 | 1981-02-19 | Roehm Gmbh | IMPROVED METHOD FOR PRODUCING LEATHER |
-
1933
- 1933-05-11 DE DEG85519A patent/DE622213C/en not_active Expired
-
1934
- 1934-04-27 US US722815A patent/US1974861A/en not_active Expired - Lifetime
- 1934-05-07 NL NL69365A patent/NL38797C/en active
- 1934-05-08 BE BE403029A patent/BE403029A/en unknown
- 1934-05-08 FR FR772976D patent/FR772976A/en not_active Expired
- 1934-05-11 GB GB14280/34A patent/GB433815A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB433815A (en) | 1935-08-21 |
| DE622213C (en) | 1935-11-22 |
| BE403029A (en) | 1934-06-30 |
| NL38797C (en) | 1936-08-15 |
| FR772976A (en) | 1934-11-09 |
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