US1584462A - Soaking liquor for dried hides and the like - Google Patents
Soaking liquor for dried hides and the like Download PDFInfo
- Publication number
- US1584462A US1584462A US714566A US71456624A US1584462A US 1584462 A US1584462 A US 1584462A US 714566 A US714566 A US 714566A US 71456624 A US71456624 A US 71456624A US 1584462 A US1584462 A US 1584462A
- Authority
- US
- United States
- Prior art keywords
- hides
- water
- dried
- gallons
- lbs
- 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
- 238000002791 soaking Methods 0.000 title description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 150000003839 salts Chemical class 0.000 description 11
- 239000000243 solution Substances 0.000 description 7
- 239000001509 sodium citrate Substances 0.000 description 6
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 6
- 239000003513 alkali Substances 0.000 description 5
- 239000000276 potassium ferrocyanide Substances 0.000 description 5
- 235000012249 potassium ferrocyanide Nutrition 0.000 description 5
- 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 5
- 229940048086 sodium pyrophosphate Drugs 0.000 description 5
- XOGGUFAVLNCTRS-UHFFFAOYSA-N tetrapotassium;iron(2+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] XOGGUFAVLNCTRS-UHFFFAOYSA-N 0.000 description 5
- 235000019818 tetrasodium diphosphate Nutrition 0.000 description 5
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 4
- GTSHREYGKSITGK-UHFFFAOYSA-N sodium ferrocyanide Chemical compound [Na+].[Na+].[Na+].[Na+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] GTSHREYGKSITGK-UHFFFAOYSA-N 0.000 description 4
- 239000000264 sodium ferrocyanide Substances 0.000 description 4
- 235000012247 sodium ferrocyanide Nutrition 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 210000002966 serum Anatomy 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 100 gallons Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 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
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000011083 sodium citrates Nutrition 0.000 description 1
- 239000001117 sulphuric acid Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 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
- C14C1/04—Soaking
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 May 11, 1926.
DOROTHY JORDAN LLOYD AND ROBERT HOWSON ASSIGNORS TO OURSELVES AND THE BRITISH PICKARD, or LONDON, ENGLAND, LEATHER MANUFACTURERS RE- SEARCH ASSOCIATION, OF LONDON, ENGLAND.
SOAKING LIQUOR FOR DRIED HIDES AND THE LIKE.
No Drawing.
This invention relates to an improved method of treatment for dried hides, kips, skins and the like to soften the said hides or the like and has for one of its objects the provision of means whereby the time of treatment is considerably reduced as compared with that necessary when dried hides, kips, skins and the like are merely soaked in water or known soaking liquors containing accelerators in the form of acids or alkalies or substances behaving analogously to acids or alkalies, a further object being to produce a soaked pelt of better substance than can be obtained when known accelerators are used.
Experiments have shown that certain soluble salts which in dilute solution are capable of dispersing serum albumen which has been coagulated by heat will in such dilute solution soften and loosen dried (or drysalted) hides in approximately one third of the time usually required. It is to be understood that in this specification the use of the term polyvalent is to be held to exclude divalency and the use of the expression dried hides is to include drysalted hides in accordance with the usual practice.
- The invention consists in an improved iethod of treatment for dried hides, kips, skins and the like to soften the said hides or the like and comprises soaking the said hides or the like in a dilute aqueous solution of one or more soluble salts which contain polyvalent radicals and form negative polyvalent ions in such dilute solutions, said soluble salts in the concentration employed, being capable of dispersing serum albumen which has been coagulated by heat, but not capable of tanning the pelt.
In order that the invention may be the better understood we will now proceed to describe examples which will enable the in vention to be put into practical effect but obviously many modifications and variations may be introduced to suit particular requirements Soluble salts suitable for use in preparing a soaking liquor according to this invention include sodium citrate, potassium ferro cyanide, sodium ferrocyanide and sodium pyrophosphate and any of these salts in the proportion of approximately one two hundredth of the weight of the anhydrous n1ole- Application filed May 20, 1924. Serial No. 714,566.
cule expressed in pounds dissolved in one hundred gallons of water may be employed.
Specifically, for dealing with average dried kips and skins of average weight either of the following soaking liquors may be employed viz Sodium citrate, 1.3 lbs; water, 100 gal ions; or potassium ferrocyanide, 1.9 lbs; water, 100 gallons; or sodium ferrocyanide, 1.5 lbs; water, 100 gallons; or sodium pyrophosphate, 1.3 lbs; water, 100 gallons.
hen thick average dried hides or thin average dried skins are to be treated greater or less concentration respectively should be used for example either of the following soaking liquors may be used for treating thick average dried hides, viz
Sodium citrate, 2.0 lbs; water, 100 gallons; or potassium ferrocyanide, 2.8 lbs; Water, 100 gallons; or sodium ferrocyanide, 2.2 lbs; water, 100 gallons; or'sodium pyrophosphate, 2.0 lbs; water, 100 gallons; and either of the following for treating thin average dried (or drysalted) skins, viz
Sodium citrate, 1.0 lb; water, 100 gallons; or potassium ferrocyanide, 1.5 lbs; water, 100 gallons; or sodium ferrocyanide, 1.3 lbs; water, 100 gallons; or sodium pyrophosphate, 1.0 lb; water 100 gallons.
Obviously in dealing with dried (or drysalted) hides, kips, skins, and the like it is impossible to absolutely define the best possible concentration for the solutions owing to-the absence of any standard for comparison of such hides and the like and therefore it may be necessary to vary the concentration when the degree of drying, heat of drying, or exposure to sun or other light rays has produced other than an average dried hide, kip, skin or the like.
In some cases more than one of the soluble salts may be included in the prepared soaking liquor provided that no objectionable chemical interaction or reaction takes place; for example a suitable soaking liquor for treating average dried kips or skins of average weight may include Sodium citrate, 0.6 lbs; potassium ferrocyanide, 1.0 lb; water, 100 gallons, or sodium citrate, 0.4 lbs; sodium pyrophosphate, 0.9 lbs; water, 100 gallons.
\Vhen making up soaking liquors in accordance with this invention the effect of the constituents of the water on the negative polyvalent ion which should be present as a result of the solution of the selected salt or salts in the water, must be considered; for example if a Water containing sodium or other alkali carbonate or bicarbonate is to be used the alkali must first be neutralized by the addition of sulphuric acid for example. Alternatively, the alkali may be neutralized by such an acid as will produce one or more of the soluble salts of the type already defined and in such case allowance must be made in calculating the addition required to produce a soaking liquor.
Having now particularly described and as certained the nature of our said invention and in What manner the same is to be performed, we declare that what we claim is 1. An improved method of treatment for dried hides, kips, skins and the like to soften the said hides, comprising the soaking of the said hides in a dilute solution in water of one or more soluble salts which contain polyvalent radicals and form negative polyvalent ions in such dilute solution said soluble salts in the concentration employed being capable of dispersing serum albumen which has been coagulated by heat but not capable of tanning the pelt.
2. In a soaking liquor as claimed in claim 1 the use of a concentration of approximately one two hundredth of the molecular weight of the anhydrous molecule expressed in pounds dissolved in one hundred gallons ot' water.
In testimony whereof we have signed our names to this specification.
DOROTHY JORDAN LLOYD. ROBERT H. PIOKARD.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19312/23A GB221058A (en) | 1923-07-27 | 1923-07-27 | Improvements in and relating to soaking liquors for dried hides and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1584462A true US1584462A (en) | 1926-05-11 |
Family
ID=10127279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US714566A Expired - Lifetime US1584462A (en) | 1923-07-27 | 1924-05-20 | Soaking liquor for dried hides and the like |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1584462A (en) |
| GB (1) | GB221058A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050132499A1 (en) * | 2003-08-14 | 2005-06-23 | Council Of Scientific & Industrial Research | Process for leather making using saline water |
| CN107779526B (en) * | 2017-10-28 | 2020-06-23 | 海宁森德皮革有限公司 | Production method of seat leather special for high-speed train |
-
1923
- 1923-07-27 GB GB19312/23A patent/GB221058A/en not_active Expired
-
1924
- 1924-05-20 US US714566A patent/US1584462A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB221058A (en) | 1924-09-04 |
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