CN101435003A - White leather tanning agent and production method thereof - Google Patents
White leather tanning agent and production method thereof Download PDFInfo
- Publication number
- CN101435003A CN101435003A CNA2008102438509A CN200810243850A CN101435003A CN 101435003 A CN101435003 A CN 101435003A CN A2008102438509 A CNA2008102438509 A CN A2008102438509A CN 200810243850 A CN200810243850 A CN 200810243850A CN 101435003 A CN101435003 A CN 101435003A
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- CN
- China
- Prior art keywords
- tanning agent
- parts
- leather tanning
- yellowing
- white leather
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000010985 leather Substances 0.000 title claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 238000004383 yellowing Methods 0.000 claims abstract description 13
- 238000004821 distillation Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000010992 reflux Methods 0.000 claims abstract description 11
- 238000005292 vacuum distillation Methods 0.000 claims abstract description 11
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical class OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 238000010792 warming Methods 0.000 claims description 10
- BDAGIHXWWSANSR-UHFFFAOYSA-N Formic acid Chemical compound OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- ZZVUWRFHKOJYTH-UHFFFAOYSA-N diphenhydramine Chemical compound C=1C=CC=CC=1C(OCCN(C)C)C1=CC=CC=C1 ZZVUWRFHKOJYTH-UHFFFAOYSA-N 0.000 claims description 5
- ZNZYKNKBJPZETN-WELNAUFTSA-N Dialdehyde 11678 Chemical compound N1C2=CC=CC=C2C2=C1[C@H](C[C@H](/C(=C/O)C(=O)OC)[C@@H](C=C)C=O)NCC2 ZNZYKNKBJPZETN-WELNAUFTSA-N 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- 150000001299 aldehydes Chemical class 0.000 claims description 3
- WUUHFRRPHJEEKV-UHFFFAOYSA-N tripotassium borate Chemical compound [K+].[K+].[K+].[O-]B([O-])[O-] WUUHFRRPHJEEKV-UHFFFAOYSA-N 0.000 claims description 3
- 229960004418 trolamine Drugs 0.000 claims description 3
- 229910021538 borax Inorganic materials 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims description 2
- 239000004328 sodium tetraborate Substances 0.000 claims description 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- WYNCHZVNFNFDNH-UHFFFAOYSA-N Oxazolidine Chemical compound C1COCN1 WYNCHZVNFNFDNH-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract description 2
- 150000001342 alkaline earth metals Chemical class 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract description 2
- -1 aliphatic aldehydes Chemical class 0.000 abstract 2
- 150000001408 amides Chemical class 0.000 abstract 2
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 abstract 2
- 229910052783 alkali metal Inorganic materials 0.000 abstract 1
- 150000001340 alkali metals Chemical class 0.000 abstract 1
- 230000006837 decompression Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000004321 preservation Methods 0.000 description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 6
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005576 amination reaction Methods 0.000 description 2
- 235000012721 chromium Nutrition 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 206010023126 Jaundice Diseases 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052728 basic metal Inorganic materials 0.000 description 1
- 150000003818 basic metals Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a chromium-free tanning agent in the tanning industry and a synthetic production process thereof; the formula (weight ratio) comprises: 60-150 parts of amide containing hydroxymethyl, 30-100 parts of aliphatic aldehydes, and 1-5 parts of anti-yellowing agent. The production method comprises the following steps: in the first step, 60-150 parts of amide containing hydroxymethyl are added into a reaction kettle with a stirring function, a thermometer, a reflux condenser and a vacuum distillation unit; in the second step, temperature is raised to 30 to 40 DEG C; in the third step, 30-100 parts of aliphatic aldehydes are dripped; in the fourth step, 1-5 parts of anti-yellowing agent are added with 2-4 hours of heat insulation; and in the fifth step, decompression distillation is carried out for 4-6h at the temperature of 50-90 DEG C and the pressure of -0.3bar-0.95bar for removing the water. The third step and the fourth step can be exchanged. The invention solves the color changing problem in the production and storage processes of the products, adds a small amount of anti-yellowing material alkali metal and the borate solution of alkaline earth metal, greatly improves the storage conditions of the 'oxazolidine' type tanning agent, and prolongs the quality guaranteeing time; as the anti-yellowing material has low price, is easy for acquisition, and has small adding amount, the invention does not affect the application characteristics of the products and can be widely promoted.
Description
Technical field
The present invention relates to chrome-free tanning agent and synthesis and production process thereof in a kind of leather industry, belong to the technical field of fine chemistry industry.
Background technology
The wet blue that makes with chrome tanning remains the main flow of leather industry at present, does not also have a kind of material can substitute chromium powder fully.But along with the pay attention to day by day of the mankind to environment and health, a large amount of unabsorbed trivalent chromiums and sexavalent chrome more and more cause people's attention to human and biological carcinogenic and transgenation effect in the chrome tanning process, so after the seventies, the research of the substitute of various chrome tanning agents is the brainstorm subject of national governments and R﹠D institution always, and the energy part substitute chromium tanning agent of using always has at present:
1, other metal tanning agents (iron tannage, aluminum tanning, zirconium tanning etc.): because of its tanning stability, characteristics such as the post shrinkage temperature of tanning all do not reach the performance of chrome tanning and do not use on a large scale;
2, aldehyde tannage: formaldehyde commonly used though its tanned leather of glutaraldehyde has many advantages, also has many shortcomings such as the formaldehyde hazardness to human body simultaneously, the expensive and easy xanthochromia of glutaraldehyde price;
3, oil tanning: shrinkage temperature is too low;
4, other synthetic tanning agentes: can only be used in retanning.
Sichuan University successfully synthesized " oxazolidine " class Chrome-free main tanning agent in 2004, shrinkage temperature height, but this class tanning agent poor heat stability, and easy xanthochromia is not so enter formal big production always.
Summary of the invention
The objective of the invention is the deficiency of the Chrome-free main tanning agent product poor heat stability that causes at prior art and improved plan is provided, impel this series products to realize suitability for industrialized production early.
Purpose of the present invention is achieved through the following technical solutions:
Prescription (weight ratio): the aminate that contains methylol: 60-150 part, alkanoic: 30-100 part, anti-yellowing agent: 1-5 part.
The aminate that wherein contains methylol can be at least a in hydramine or diethanolamine or the trolamine; Alkanoic is single aldehyde, the oxalic dialdehyde of C1-C4, at least a in the glutaraldehyde; Anti-yellowing agent is the borate solution of alkalies and alkaline earth, and as Sodium Tetraborate, potassium borate etc. also can add boric acid earlier, and the back adds sodium hydroxide or potassium hydroxide.
Production method:
The first step: the aminate adding that 60-150 part is contained methylol has in the reactor of stirring, thermometer and reflux exchanger and vacuum distillation plant;
Second step: be warming up to 30-40 ℃;
The 3rd step: drip 30-100 part alkanoic;
The 4th step: add 1-5 part anti-yellowing agent, be incubated 2-4 hour;
The 5th step: at temperature 50-90 ℃, pressure-0.3bar--0.95bar carries out underpressure distillation 4-6h and removes moisture;
Or:
The first step: the aminate adding that 60-150 part is contained methylol has in the reactor of stirring, thermometer and reflux exchanger and vacuum distillation plant;
Second step: be warming up to 30-40 ℃;
The 3rd step: add 1-5 part anti-yellowing agent;
The 4th step: drip 30-100 part alkanoic, be incubated 2-4 hour;
The 5th step: at temperature 50-90 ℃, pressure-0.3bar--0.95bar carries out underpressure distillation 4-6h and removes moisture;
Beneficial effect: " oxazolidine " class tanning agent product is color meeting flavescence in production and storage process, influences the whiteness of finished product skin, reduces result of use.The present invention is on original technical foundation, in reaction mixture, add the borate solution of basic metal and alkaline-earth metal,, solved the discoloration problem in products production and the storage process through test, add the borate solution of a small amount of anti-xanthochromia raw material alkalies and alkaline earth, improve the condition of storage of " oxazolidine " class tanning agent greatly, prolong and guarantee the quality the time, used anti-xanthochromia cost of material is cheap, obtain easily, anti-xanthochromia raw material dosage is few, does not influence the application characteristic of product, can extensively promote.What the present invention obtained is colourless to faint yellow finished product, but room temperature preservation, if there is the temporary cessation of production of needs also can not cause deterioration in quality in the production process because of the intermediate jaundice.After adding the borate solution of alkalies and alkaline earth in process of production, the work in-process normal temperature storage time before the underpressure distillation can obviously prolong, and color and luster is constant, and the finished product storage time also obviously prolongs, and can accomplish room temperature preservation substantially, thereby realizes suitability for industrialized production.
Embodiment
Embodiment 1:
The first step: the adding of 61kg hydramine is had stirring, in the reactor of thermometer and reflux exchanger and vacuum distillation plant;
Second step: be warming up to 30-40 ℃;
The 3rd step: drip the 30kg Paraformaldehyde 96;
The 4th step: add the 1kg dobell's solution again, be incubated 2 hours again after adding;
The 5th step: at temperature 50-90 ℃, pressure-0.3bar--0.95bar carries out underpressure distillation 6h and removes moisture, obtains colourless extremely faint yellow finished product, but room temperature preservation.
Embodiment 2:
The first step: the adding of 61kg hydramine is had stirring, in the reactor of thermometer and reflux exchanger and vacuum distillation plant;
Second step: be warming up to 30-40 ℃;
The 3rd step: add the 2kg dobell's solution;
The 4th step: drip 46kg acetaldehyde, be incubated 4 hours again after adding;
The 5th step: at temperature 50-90 ℃, pressure-0.3bar--0.95bar carries out underpressure distillation 4h and removes moisture, obtains colourless extremely faint yellow finished product, but room temperature preservation.
Embodiment 3:
The first step: the adding of 61kg hydramine is had stirring, in the reactor of thermometer and reflux exchanger and vacuum distillation plant;
Second step: be warming up to 30-40 ℃;
The 3rd step: add 1.2kg boric acid, the back that stirs adds 0.8kg sodium hydroxide (95%);
The 4th step: drip the 100kg glutaraldehyde, be incubated 4 hours again after adding;
The 5th step: at temperature 50-90 ℃, pressure-0.3bar--0.95bar carries out underpressure distillation 4h and removes moisture, obtains colourless extremely faint yellow finished product, but room temperature preservation.
Embodiment 4:
The first step: the adding of 105kg di-alcohol amination thing is had stirring, in the reactor of thermometer and reflux exchanger and vacuum distillation plant;
Second step: be warming up to 30-40 ℃;
The 3rd step: drip 46kg acetaldehyde;
The 4th step: add the 3kg dobell's solution, be incubated 4 hours again after adding;
The 5th step: at temperature 50-90 ℃, pressure-0.3bar--0.95bar carries out underpressure distillation 6h and removes moisture, obtains colourless extremely faint yellow finished product, but room temperature preservation.
Embodiment 5:
The first step: the adding of 105kg di-alcohol amination thing is had stirring, in the reactor of thermometer and reflux exchanger and vacuum distillation plant;
Second step: be warming up to 30-40 ℃;
The 3rd step: drip the 60kg oxalic dialdehyde;
The 4th step: add 1.8kg boric acid, add 1.2kg sodium hydroxide after adding again, the insulation of dissolving back is 4 hours fully;
The 5th step: at temperature 50-90 ℃, pressure-0.3bar--0.95bar carries out underpressure distillation 6h and removes moisture, obtains colourless extremely faint yellow finished product, but room temperature preservation.
Embodiment 6:
The first step: the adding of 150kg trolamine thing is had stirring, in the reactor of thermometer and reflux exchanger and vacuum distillation plant;
Second step: be warming up to 30-40 ℃;
The 3rd step: add 4kg potassium borate solution;
The 4th step: drip the 65kg oxalic dialdehyde, be incubated 4 hours again after adding;
The 5th step: at temperature 50-90 ℃, pressure-0.3bar-0.95bar carries out underpressure distillation 6h and removes moisture, obtains colourless extremely faint yellow finished product, but room temperature preservation.
Claims (8)
1, a kind of white leather tanning agent is characterized in that comprising following prescription (weight ratio): the aminate that contains methylol: 60-150 part, alkanoic: 30-100 part, anti-yellowing agent: 1-5 part.
2, white leather tanning agent according to claim 1 is characterized in that: the aminate that wherein contains methylol can be hydramine or diethanolamine or trolamine.
3, white leather tanning agent according to claim 1 is characterized in that: alkanoic is single aldehyde or oxalic dialdehyde or the glutaraldehyde of C1-C4.
4, white leather tanning agent according to claim 1 is characterized in that: anti-yellowing agent is the borate solution of alkalies and alkaline earth.
5, white leather tanning agent according to claim 4 is characterized in that: the borate solution of alkalies and alkaline earth is Sodium Tetraborate or potassium borate.
6, white leather tanning agent according to claim 1 is characterized in that: anti-yellowing agent is for adding boric acid earlier, and the back adds sodium hydroxide or potassium hydroxide.
7, a kind of production method of white leather tanning agent according to claim 1 is characterized in that:
The first step: the aminate adding that 60-150 part is contained methylol has in the reactor of stirring, thermometer and reflux exchanger and vacuum distillation plant;
Second step: be warming up to 30-40 ℃;
The 3rd step: drip 30-100 part alkanoic;
The 4th step: add 1-5 part anti-yellowing agent, be incubated 2-4 hour;
The 5th step: at temperature 50-90 ℃, pressure-0.3bar--0.95bar carries out underpressure distillation 4-6h and removes moisture.
8, the production method of another kind of white leather tanning agent according to claim 1 is characterized in that:
The first step: the aminate adding that 60-150 part is contained methylol has in the reactor of stirring, thermometer and reflux exchanger and vacuum distillation plant;
Second step: be warming up to 30-40 ℃;
The 3rd step: add 1-5 part anti-yellowing agent;
The 4th step: drip 30-100 part alkanoic, be incubated 2-4 hour;
The 5th step: at temperature 50-90 ℃, pressure-0.3bar--0.95bar carries out underpressure distillation 4-6h and removes moisture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102438509A CN101435003B (en) | 2008-12-09 | 2008-12-09 | White leather tanning agent and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102438509A CN101435003B (en) | 2008-12-09 | 2008-12-09 | White leather tanning agent and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101435003A true CN101435003A (en) | 2009-05-20 |
| CN101435003B CN101435003B (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102438509A Active CN101435003B (en) | 2008-12-09 | 2008-12-09 | White leather tanning agent and production method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN101435003B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995861A (en) * | 2017-06-15 | 2017-08-01 | 泉州鑫彩贸易有限公司 | Tanning agent and its grey squirrel process for tanning for grey squirrel |
| CN107022655A (en) * | 2017-06-15 | 2017-08-08 | 泉州鑫彩贸易有限公司 | Tanning agent and its dogskin process for tanning for dogskin |
| CN107034324A (en) * | 2017-06-15 | 2017-08-11 | 泉州鑫彩贸易有限公司 | Tanning agent and its sheepskin process for tanning for sheepskin |
| CN107058648A (en) * | 2017-06-15 | 2017-08-18 | 泉州鑫彩贸易有限公司 | Tanning agent and its fox skin process for tanning for fox skin |
| CN107090527A (en) * | 2017-06-15 | 2017-08-25 | 泉州鑫彩贸易有限公司 | Tanning agent and its crocodile skin process for tanning for crocodile skin |
| CN107099625A (en) * | 2017-06-15 | 2017-08-29 | 泉州鑫彩贸易有限公司 | Tanning agent and its horse skin process for tanning for horse skin |
| CN107099624A (en) * | 2017-06-15 | 2017-08-29 | 泉州鑫彩贸易有限公司 | Tanning agent and its pigskin process for tanning for pigskin |
| CN107190108A (en) * | 2017-06-15 | 2017-09-22 | 泉州鑫彩贸易有限公司 | Tanning agent and its lynx process for tanning for lynx |
| CN107419039A (en) * | 2017-06-15 | 2017-12-01 | 泉州鑫彩贸易有限公司 | Tanning agent and its donkey hide process for tanning for donkey hide |
| CN107419040A (en) * | 2017-06-15 | 2017-12-01 | 泉州鑫彩贸易有限公司 | Tanning agent and its ox-hide process for tanning for ox-hide |
| IT201700007426A1 (en) * | 2017-01-24 | 2018-07-24 | Re Al Color S R L | TANNING AGENTS AND TANNING PROCESS |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1219077C (en) * | 2002-06-21 | 2005-09-14 | 四川大学 | Chrome free or less chrome main tanning agent for leather and preparation process thereof |
-
2008
- 2008-12-09 CN CN2008102438509A patent/CN101435003B/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201700007426A1 (en) * | 2017-01-24 | 2018-07-24 | Re Al Color S R L | TANNING AGENTS AND TANNING PROCESS |
| EP3351646A1 (en) * | 2017-01-24 | 2018-07-25 | Re. Al. Color S.r.l. | Chromium-free tanning agents and tanning process |
| CN106995861A (en) * | 2017-06-15 | 2017-08-01 | 泉州鑫彩贸易有限公司 | Tanning agent and its grey squirrel process for tanning for grey squirrel |
| CN107022655A (en) * | 2017-06-15 | 2017-08-08 | 泉州鑫彩贸易有限公司 | Tanning agent and its dogskin process for tanning for dogskin |
| CN107034324A (en) * | 2017-06-15 | 2017-08-11 | 泉州鑫彩贸易有限公司 | Tanning agent and its sheepskin process for tanning for sheepskin |
| CN107058648A (en) * | 2017-06-15 | 2017-08-18 | 泉州鑫彩贸易有限公司 | Tanning agent and its fox skin process for tanning for fox skin |
| CN107090527A (en) * | 2017-06-15 | 2017-08-25 | 泉州鑫彩贸易有限公司 | Tanning agent and its crocodile skin process for tanning for crocodile skin |
| CN107099625A (en) * | 2017-06-15 | 2017-08-29 | 泉州鑫彩贸易有限公司 | Tanning agent and its horse skin process for tanning for horse skin |
| CN107099624A (en) * | 2017-06-15 | 2017-08-29 | 泉州鑫彩贸易有限公司 | Tanning agent and its pigskin process for tanning for pigskin |
| CN107190108A (en) * | 2017-06-15 | 2017-09-22 | 泉州鑫彩贸易有限公司 | Tanning agent and its lynx process for tanning for lynx |
| CN107419039A (en) * | 2017-06-15 | 2017-12-01 | 泉州鑫彩贸易有限公司 | Tanning agent and its donkey hide process for tanning for donkey hide |
| CN107419040A (en) * | 2017-06-15 | 2017-12-01 | 泉州鑫彩贸易有限公司 | Tanning agent and its ox-hide process for tanning for ox-hide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101435003B (en) | 2012-06-06 |
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