US2266448A - Process and products for deliming limed pelts - Google Patents
Process and products for deliming limed pelts Download PDFInfo
- Publication number
- US2266448A US2266448A US254008A US25400839A US2266448A US 2266448 A US2266448 A US 2266448A US 254008 A US254008 A US 254008A US 25400839 A US25400839 A US 25400839A US 2266448 A US2266448 A US 2266448A
- Authority
- US
- United States
- Prior art keywords
- pelts
- deliming
- acid
- water
- limed
- 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 14
- 150000003839 salts Chemical class 0.000 description 15
- 239000003795 chemical substances by application Substances 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000002253 acid Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 8
- 235000011941 Tilia x europaea Nutrition 0.000 description 8
- 239000004571 lime Substances 0.000 description 8
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 4
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical class NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 4
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 150000001735 carboxylic acids Chemical class 0.000 description 3
- 239000010985 leather Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 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 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 235000019253 formic acid Nutrition 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 229940062190 pancreas extract Drugs 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WWVBXWRCQNSAKA-UHFFFAOYSA-N 2-[butyl(carboxymethyl)amino]acetic acid Chemical compound CCCCN(CC(O)=O)CC(O)=O WWVBXWRCQNSAKA-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000283707 Capra Species 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 150000003868 ammonium compounds Chemical class 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- NBZBKCUXIYYUSX-UHFFFAOYSA-N iminodiacetic acid Chemical compound OC(=O)CNCC(O)=O NBZBKCUXIYYUSX-UHFFFAOYSA-N 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 210000000496 pancreas Anatomy 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 229910052979 sodium sulfide Inorganic materials 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- SOBHUZYZLFQYFK-UHFFFAOYSA-K trisodium;hydroxy-[[phosphonatomethyl(phosphonomethyl)amino]methyl]phosphinate Chemical compound [Na+].[Na+].[Na+].OP(O)(=O)CN(CP(O)([O-])=O)CP([O-])([O-])=O SOBHUZYZLFQYFK-UHFFFAOYSA-K 0.000 description 1
- 230000037303 wrinkles Effects 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S424/00—Drug, bio-affecting and body treating compositions
- Y10S424/06—Chelate
Definitions
- the present invention relates to a process and products for delimingv limed pelts.
- the elimination of the lime-from limed pelts is one of the most important operations which must be effected when the pelts are prepared for the tanning process. It is necessary that the pelts are delimed as quickly as possible and without damaging the hide material.
- the lime which remains in the pelts subjected to an incomplete deliming can bring about, as is known, various defectsappearlng in the course of further working up. With the carbonates or bicarbonates dissolved in the water, for instance, the lime easily forms insoluble precipitates which on the finished leather appear as lime blast, an inconvenience which is especially disagreeable in the case of fancy leather.
- deliming is effected by means of inorganic or organic acids, such as, for instance hydrochloric acid, sulfurous acid, sulfuric acid, formic acid, acetic acid, lactice acid, glycolic acid or butyric acid, which acids are used, if desired, in the form of their acid salts or their ammonium compounds, or also by means of the so-called bates, such as dungbates, pancreas extracts, bacterial bates or artificial bates.
- inorganic or organic acids such as, for instance hydrochloric acid, sulfurous acid, sulfuric acid, formic acid, acetic acid, lactice acid, glycolic acid or butyric acid, which acids are used, if desired, in the form of their acid salts or their ammonium compounds, or also by means of the so-called bates, such as dungbates, pancreas extracts, bacterial bates or artificial bates.
- bates such as dungbates, pancreas extracts, bacterial
- Acids of the above-indicated kind are, forinstance': nitrilotriacetic acid and its substitution products-such as C-methylor C-phenyl-nitrilo-triacetic acid, ethylene-bis-imino-diacetic acid, furthermore imino-diacetic acid and its derivatives substituted at the nitrogen.
- nitrilotriacetic acid and its substitution products such as C-methylor C-phenyl-nitrilo-triacetic acid, ethylene-bis-imino-diacetic acid, furthermore imino-diacetic acid and its derivatives substituted at the nitrogen.
- substitution products such as C-methylor C-phenyl-nitrilo-triacetic acid, ethylene-bis-imino-diacetic acid, furthermore imino-diacetic acid and its derivatives substituted at the nitrogen.
- atom for instance N-methy1-, N-butylimino-diace
- the salts of the above-named amino-carboxyli'c acids are distinguished by the'fact that they form water-soluble complex salts to bind the lime boundby the hide, the calcium compounds such as calcium carbonate present on the surface of the hide and the lime soap formed by decomposition of saponified hide fat.
- the calcium is no longer capable of entering into reaction, so that reaction which might take place in the courseof the tanning process, for instance with the bicarbonates dissolved in the water or with tanning agents, are
- the hitherto known deliming agents are capable of removing only the lime which is mechanically bound to the hide or which is dis-' solved in the water absorbed by the capillary action of the hide.
- salts of the above-named, amino-carboxylic acids may also be used together withthe usual deliming agents or with the bating agents I is distinctly smoother.
- the amino-carboxylates may be applied either before or after or also simultaneously with the usual deliming and bating agents. 4
- Example 1 the ,trisodium s'altlof nitrilo-triacetic acid, calculated' upon the pelt weight; After a twelve hours treatment and after rinsing, the pelts are delimed and may directly be worked up.
- Example 2 Limed cow pelts are, after soaking, delimed in a bath containing 2.5% of the tetrasodium salt of ethylene-bis-imino-diacetic acid, calculated upon the pelt weight.
- Limed calfskins are rinsed for a short time and then introduced into a bath containing 4% of the trisodium salt of 1-aminobenzene-N.N- diacetic acid-ortlro-carboxyllc acid, calculated upon the pelt weight. After a 20 hours treatment and subsequent rinsing, the material is delimed.
- Example 4 A 100 kg. of calfskins are limed in a lime-pit containing 1 cubic meter of water, 1 kg. of concentrated sodium sulfide and 6 kg. of quicklime; after rinsing, they are treated, for one hour with 0.300
- Example 6 100 kg. of limed sheep pelts are treated with 200 liters of water having a temperature of 35 C., 1 kg. of lactic acid and 0.015 kg. of the trisodium salt of 1-aminobenzene-N.N-diacetic acidortho-carbox'ylic acid. After 1 hours, the pelts are well delimed and may, in this state, be subjected to tanning.
- Example 7 100 kg. of cow pelts are fulled, for one hour, with 300-liters of water and 0.100 kg. of the tetra: sodium salt of ethylene-bis-imino-diacetic acid. The bath is then mixed with 0.100 kg. of hydrochloric acid and, after another hour, with 0.200 kg. of hydrochloric acid. After a further hour, the pelts are sufllciently free from lime for being subjected to further tanning. Pelts treated, for comparative purposes, without the addition of the tetra-sodium salt or ethylene-bis-imino-diacetic acid, show in the cut a considerably intenser red dyeing with phenolphthalein.
- Example 8 100 kg. of cow pelts are lulled, ior'two hours,
- Example 9 100 kg. of limed goat skins are fulled, for one hour, with 0.200 kg. oi! formic acid and'0.500 kg. of the tetrasodium salt of ethylene-bis-iminodiacetic acid and then rinsed for half-an-hour.
- the pelts thus treated are distinguished by a smooth Iceland a good depletion.
- Example 10 100 kg. of limed calfskins are rinsed and treated, for one hour, with 0200 kg. of a concentrated pancreas extract and 0.250 kg. of the trisodium salt of 'nitrilo-triacetic acid. After about hour's rinsing, the pelts maybe used for further tanning; they are distinguished by a I smooth feel of the grain .and byfa good depletion.
- Deliming agents consisting essentially of water-soluble salts of carboxylic acids containing nitrogen and at least 2 organic radicals substituted by carboxyl groups in alpha-position to a nitrogen atom.
- Deliming agents comprising a water-soluble salt of nitrilo-triacetic acid.
- Deliming agents comprising a water-soluble salt of l-amino-benzene-NN-diacetic acid-orthocarboxylic acid.
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Indole Compounds (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1938I0060457 DE693065C (de) | 1938-02-07 | 1938-02-07 | Verfahren zum Entkaelken von geaescherten Haeuten und Fellen |
Publications (1)
Publication Number | Publication Date |
---|---|
US2266448A true US2266448A (en) | 1941-12-16 |
Family
ID=89942503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US254008A Expired - Lifetime US2266448A (en) | 1938-02-07 | 1939-02-01 | Process and products for deliming limed pelts |
Country Status (4)
Country | Link |
---|---|
US (1) | US2266448A (de) |
DE (1) | DE693065C (de) |
FR (1) | FR849935A (de) |
GB (1) | GB524788A (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2556649A (en) * | 1948-06-23 | 1951-06-12 | Heinemann Felix | Deliming and deswelling hides with beet sugar molasses waste liquor extract |
US4213760A (en) * | 1978-06-08 | 1980-07-22 | Basf Aktiengesellschaft | Deliming of hides |
US4229175A (en) * | 1977-04-02 | 1980-10-21 | Basf Aktiengesellschaft | Lime-free and sulfide-free liming process |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3425068B1 (de) * | 2017-07-06 | 2021-08-04 | Stahl International B.V. | Ammonium- und borsäurefreies entkälkungsmittel seine verwendungen und entkälkungsverfahren |
-
1938
- 1938-02-07 DE DE1938I0060457 patent/DE693065C/de not_active Expired
-
1939
- 1939-02-01 US US254008A patent/US2266448A/en not_active Expired - Lifetime
- 1939-02-06 FR FR849935D patent/FR849935A/fr not_active Expired
- 1939-02-07 GB GB4073/39A patent/GB524788A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2556649A (en) * | 1948-06-23 | 1951-06-12 | Heinemann Felix | Deliming and deswelling hides with beet sugar molasses waste liquor extract |
US4229175A (en) * | 1977-04-02 | 1980-10-21 | Basf Aktiengesellschaft | Lime-free and sulfide-free liming process |
US4213760A (en) * | 1978-06-08 | 1980-07-22 | Basf Aktiengesellschaft | Deliming of hides |
Also Published As
Publication number | Publication date |
---|---|
DE693065C (de) | 1940-07-01 |
GB524788A (en) | 1940-08-14 |
FR849935A (fr) | 1939-12-05 |
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