CN109072317A - Chrome tanning process - Google Patents
Chrome tanning process Download PDFInfo
- Publication number
- CN109072317A CN109072317A CN201780018098.5A CN201780018098A CN109072317A CN 109072317 A CN109072317 A CN 109072317A CN 201780018098 A CN201780018098 A CN 201780018098A CN 109072317 A CN109072317 A CN 109072317A
- Authority
- CN
- China
- Prior art keywords
- leather
- water
- rawhide
- chrome tanning
- tanning
- 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.)
- Granted
Links
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 239000010985 leather Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000011651 chromium Substances 0.000 claims abstract description 20
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 20
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 18
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 238000007667 floating Methods 0.000 claims description 10
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 8
- 150000007524 organic acids Chemical class 0.000 claims description 6
- 125000002091 cationic group Chemical group 0.000 claims description 5
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 235000019253 formic acid Nutrition 0.000 claims description 4
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- 235000011054 acetic acid Nutrition 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 150000003839 salts Chemical class 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 230000001953 sensory effect Effects 0.000 abstract 1
- 239000010865 sewage Substances 0.000 abstract 1
- 238000004148 unit process Methods 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 description 8
- 238000010306 acid treatment Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004064 recycling Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical group O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000021962 pH elevation Effects 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- 241000718541 Tetragastris balsamifera Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002699 waste material 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
- C14C3/04—Mineral tanning
- C14C3/06—Mineral tanning using chromium compounds
-
- 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
- C14C3/14—Fat tanning; Oil tanning
-
- 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
- C14C3/28—Multi-step processes
-
- 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
- C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
- C14C9/02—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes using fatty or oily materials, e.g. fat liquoring
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The present invention reveals that water must be used in the leather manufacturing process because it is important for the diffusion and distribution of chemicals in the leather matrix. Since a large amount of water is used in various unit processes, sewage discharge increases accordingly as pollutants increase. The invention relates to a chromium-free tanning process avoiding pickling-basification with water. Auxiliary chemicals such as fatliquoring agents are used to increase the chromium consumption during tanning. Furthermore, the new process avoids the use of salts and alkalization processes. The sensory and strength properties of tanned leather are comparable to conventionally processed leather. The new process is directed to tanning using the moisture carried in the leather itself, thus achieving sustainability with reduced pollution load.
Description
Technical field
The present invention relates to a kind of improved chrome tanning process.More particularly it relates in the case where not adding water into
Row chrome tanning process.The moisture carried in rawhide is used for chrome tanning.The technique enhances tanning using auxiliary chemicals such as fatting agent
The distribution and consumption of chromium in the process.In addition, the new process avoids use and the alkalinization of salt.The organoleptic attribute of tan leather
It is suitable with the leather of conventional machining.The strength characteristics of crust leather complies with standard specification, and determines the quality of leather finish.It is described new
Technique is dedicated to realizing sustainable development by reducing pollutional load.
Background technique
Leather processing procedure uses a large amount of water, this cause a large amount of waste water discharge (draw Austria etc., clean manufacturing magazine, 11,
591-599,2003).Researcher all over the world is involved in technological development, so that the dosage of water is reduced to most in leather processing
It is small.Due to its universal performance, chrome tanning becomes a kind of widely used leather manufacture technology.The use of water is for making in Chrome Tanning Process
Chromium uniformly spreads, is distributed and hydrolyzes extremely important.Chrome wastewater contains the chromium of 1500-3500ppm.The discharge of chromium is focal point,
Total chromium of 2ppm be leather-making waste water in Inland Water regulated discharge standard (Su Leishi etc., clean manufacturing magazine, 9,483-491,
2001).Therefore, it is necessary to for reducing pollution of chromium substitute technology or substitution tanning system change present case.Due to not having
There is most suitable substitution tanning agent, it appears that continue to use trivalent chromium and be more suitable for as main tanning material, and control by source
The chromium management that system or end treatment reduce pollution also complies with logic.
Chrome wastewater recycling is used for tanning or pickling is one of the best chromium management method for solving the problems, such as pollution of chromium (Si Laimu
Deng, American Leather chemist association magazine, 100,233-242, Larry tower is not blue and John, WO patent 2012153203A1,
2012).However, it is necessary to periodically control and monitor the acidity and salinity of liquid.Recycling/reuse method is very simply and effectively
The method for reducing pollution of chromium, and more and more important (Si Laimu and La Masa meter, resource, protection and recycling, 38,185-212,
2003).It has developed at present and (has drawn horse Murthy etc., clean technologies using row's chromium auxiliary agent, high row's chrome tanning salt manufacturing and few chromium technology
And environmental policy, 16,647-654,2014；Model and Brendler, United States Patent (USP) 7063728B2,2014).
Pickling-alkalization is the development of another commericially feasible without chrome tanning, and wherein chrome tanning does not use ordinary salt, and about 5.0
Higher pH under carry out.In addition, do not need in this process alkalization (Lai Gaisai etc., American Leather chemist association magazine, 97,
475-486 2002, drawing Austria etc., American Leather chemist association magazine, 99,82-94,2004, John and the Larry Mo tower are blue, WO
Patent 2012153203A1,2006).However, compared with traditional chrome tanning system based on pickling, technique disclosed in this invention
Using a large amount of water-bearing media and discharge the waste water of at a fairly low pollutional load.In addition, researcher is also in research in chrome tanner
The substitute medium of water is used in skill.Xi Lanbalasang et al. (Royal Society of Chemistry periodical, 5,66815-66823,2015)
Have shown that chrome tanning can be in ethyl alcohol and its derivative without carrying out in water.Similarly, use it is carbon dioxide pressurized as
The report (Manfredi etc., supercritical fluid magazine, 66,291-296,2012) of the medium of chrome tanning.A nearest research table
Internal water (Xi Lanbalasang that is bright, needing collagen stroma to contain at least 55-65% for the comparable chrome tanning leather of manufacturing quality
Deng clean manufacturing magazine, 87,567-572,2015).
It can be seen that from the prior art, the existing knowledge about more clean chrome tanning process and other chromium management measures is to enable
Known to people.The prior art concentrates on pickling-free, substitutes the technologies such as use of substitute medium in tanning system and chrome tanning.Certain
A little industries also use the recycling and reuse of waste liquid.However, the generation of chromate waste water be still leather manufacture quotient face it is main
Challenge.In addition, the available good water sources of chrome tanning also become rare.Therefore, there is an urgent need to provide zero water chrome tanning system.
Goal of the invention
The main object of the present invention is to provide a kind of zero water chrome tanning process, eliminates above-mentioned limitation.
Another object of the present invention is to carry out chrome tanning using the moisture carried in rawhide.
A further object of the present invention is to stablize fatting agent and sun using auxiliary chemicals such as acid during chrome tanning process
Ion fatting agent.
Another object of the present invention is that organic acid for adjusting pH is used before chrome tanning.
Another object of the present invention is to improve the absorption of chromium.
Another object of the present invention is pollution and the toxic chemical substance reduced in waste water.
Another object of the present invention is the physical strength characteristics for having leather similar to conventional chrome tanned leathers.
Compared with conventional machining, another object of the present invention is to shorten the process time of chrome tanning.
Compared with conventional machining, another object of the present invention is to save alkalinization.
Summary of the invention
Therefore, the present invention provides a kind of improved chrome tanning process comprising:
(1) in the water of 40-60%, dedusting rawhide/crust is handled with the organic acid of 0.5-1.5%, to adjust pH value extremely
4.8-5.8；
(2) rawhide/crust for floating material being discharged and being obtained with the conventional fatting agent processing step (1) of 0.5-2.0% continues
20 to 60 minutes；
(3) rawhide/crust 240 that conventional chrome tanning agent processing step (2) primary or that 5-8% is added several times obtains to
360 minutes, obtain chrome leather.
In one embodiment of the invention, used organic acid is selected from one of formic acid, acetic acid and oxalic acid or more
Kind various combination.
In another embodiment of the present invention, used conventional fatting agent is selected from cationic fat liquor, sour stablize adds
Rouge agent, general fatting agent and chromium stablize one of fatting agent or a variety of various combinations.
Specific embodiment
The present invention is described in detail as follows.
With rawhide/crust of the organic acid processing dedusting of 0.5-1.5% in the water of 40-60%.By the pH tune of rawhide
In the range of section to 4.8-5.8.Reach after pH requires, empty floating material, with the conventional fatting agent of 0.5-2.0% processing rawhide/
Crust.20 to after sixty minutes, and one or many conventional chrome tanning agents that 5-8% is added handle rawhide/crust, continue 240 to 360 points
Clock.Make pH value in the range of 3.6-4.4, to obtain chrome leather.
Creativeness of the invention is to carry out chrome tanning using the internal moisture of raw material, to reduce discharge of wastewater.In addition, described
New process does not use ordinary salt, and significant reduce water requirement, shortens the process time and reduce cost.
Following example is only shown by way of illustration, therefore should not be construed as limiting the scope of the invention.
Example 1
The dedusting rawhide of a slice weight 1.5kg is handled with the water-reducible 7.5g formic acid of 75ml, and carries out rotary drum in 600ml water
Processing.Make the pH value 4.8 of rawhide.After reaching pH value requirement, floating material is emptied, stablizes fatting agent with 7.5g acid and handles rawhide.
After twenty minutes, 75g routine chrome tanning agent (BCS) processing rawhide was added in two portions with 30 minutes intervals, continues 240 minutes.Make pH value
For 3.6 to obtain chrome leather.
Example 2
With the dedusting rawhide of the water-reducible three slice weight 5kg of 50g acetic acid treatment of 500ml, and rotary drum is carried out in 2.5L water and is added
Work.Make the pH value 5.0 of rawhide.After reaching pH value requirement, floating material is emptied, handles rawhide with 50g cationic fat liquor.45 points
Zhong Hou is added 350g routine chrome tanning agent (BCS) processing rawhide with 30 minutes intervals in three times, continues 300 minutes.Make pH value
3.8 to obtain chrome leather.
Example 3
With the dedusting rawhide of the water-reducible two slice weight 3kg of 45g acetic acid treatment of 450ml, and rotary drum is carried out in 1.8L water and is added
Work.Make the pH value 5.8 of rawhide.After reaching pH value requirement, floating material is emptied, handles rawhide with the general fatting agent of 60g.60 minutes
Afterwards, 240g routine chrome tanning agent (BCS) processing rawhide was added in four times with 30 minutes intervals, continues 360 minutes.Make pH value 4.4
To obtain chrome leather.
Example 4
With the dedusting rawhide of the water-reducible four slice weight 10kg of 100g acetic acid treatment of 1L, and rotary drum processing is carried out in 6L water.
Make the pH value 5.0 of rawhide.After reaching pH value requirement, floating material is emptied, handles rawhide with 100g cationic fat liquor.30 minutes
Afterwards, 600g routine chrome tanning agent (BCS) processing rawhide was added in two portions with 30 minutes intervals, continues 300 minutes.Make pH value 4.0
To obtain chrome leather.
Example 5
With the dedusting rawhide of the water-reducible two slice weight 6kg of 60g oxalic acid treatment of 600ml, and rotary drum is carried out in 3.6L water and is added
Work.Make the pH value 5.2 of rawhide.After reaching pH value requirement, floating material is emptied, stablizes fatting agent with 60g chromium and handles rawhide.60 points
Zhong Hou is added 360g routine chrome tanning agent (BCS) processing rawhide with 30 minutes intervals in three times, continues 240 minutes.Make pH value
4.4 to obtain chrome leather.
Example 6
With the dedusting rawhide of the water-reducible one slice weight 1kg of 10g oxalic acid treatment of 50ml, and rotary drum is carried out in 400ml water and is added
Work.Make the pH value 4.8 of fur.After reaching pH value requirement, floating material is emptied, handles rawhide with 5g cationic fat liquor.30 points
Zhong Hou is added in two portions 60g routine chrome tanning agent (BCS) processing rawhide with 30 minutes intervals, continues 240 minutes.Make pH value 4.4
To obtain chrome leather.
Example 7
The dedusting rawhide of three slice weight 6kg is handled with the water-reducible 30g acetic acid of 900ml and 30g formic acid, and in 3.6L water into
The processing of row rotary drum.Make the pH value 5.2 of rawhide.After reaching pH value requirement, floating material is emptied, stablizes fatting agent and 30g with 30g acid
Chromium stablizes fatting agent and handles rawhide.After sixty minutes, 360g routine chrome tanning agent (BCS) processing life was added in two portions with 30 minutes intervals
Skin continues 240 minutes.Make pH value 4.2, obtains chrome leather.
Advantage of the present invention
Main advantages of the present invention include:
1. carrying out tanning using the moisture that dedusting leather carries；
2. not using process water during chrome tanning process；
3. reducing the pollutional load to environment；
4. shortening the processing time；
5. being the technique suitable for various raw materials；
6. producing soft soft and elastic leather.
Claims (3)
1. a kind of improved chrome tanning process, comprising:
(1) in the water of 40-60%, dedusting rawhide/crust is handled with the organic acid of 0.5-1.5%, to adjust pH value to 4.8-
5.8；
(2) floating material and rawhide/crust for being obtained with the conventional fatting agent processing step (1) of 0.5-2.0% is discharged, continue 20 to
60 minutes；
(3) rawhide/240 to 360 points of crust that conventional chrome tanning agent processing step (2) primary or that 5-8% is added several times obtains
Clock obtains chrome leather.
2. a kind of improvement technique as described in claim 1, wherein used organic acid is in formic acid, acetic acid and oxalic acid
One or more various combinations.
3. a kind of improvement technique as described in claim 1, wherein used routine fatting agent is selected from cationic fat liquor, acid
Stablize fatting agent, general fatting agent and chromium and stablizes one of fatting agent or a variety of various combinations.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN201611009091 | 2016-03-16 | ||
| IN201611009091 | 2016-03-16 | ||
| PCT/IN2017/050016 WO2017158617A1 (en) | 2016-03-16 | 2017-01-11 | Chrome tanning process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109072317A true CN109072317A (en) | 2018-12-21 |
| CN109072317B CN109072317B (en) | 2021-07-02 |
Family
ID=58455375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780018098.5A Active CN109072317B (en) | 2016-03-16 | 2017-01-11 | Chrome tanning process |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP3430174B1 (en) |
| CN (1) | CN109072317B (en) |
| AR (1) | AR105795A1 (en) |
| BR (1) | BR112018068661B1 (en) |
| ES (1) | ES2632994B1 (en) |
| MX (1) | MX2018011207A (en) |
| PT (1) | PT3430174T (en) |
| TW (1) | TW201805434A (en) |
| WO (1) | WO2017158617A1 (en) |
| ZA (1) | ZA201608580B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116829738A (en) * | 2020-12-14 | 2023-09-29 | 伊科斯克有限公司 | Process for tanning animal hides |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060488A (en) * | 2012-12-26 | 2013-04-24 | 四川亭江新材料股份有限公司 | Environment-friendly type crust leather production method |
| CN103146850A (en) * | 2013-02-01 | 2013-06-12 | 四川大学 | Salt-free pickling-free amphoteric polymer chrome-free tanning agent |
| CN105063253A (en) * | 2015-08-10 | 2015-11-18 | 四川大学 | Salt-free high-chrome-absorption chrome tanning method for animal skin and application of salt-free high-chrome-absorption chrome tanning method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PT102211B (en) * | 1998-10-14 | 2003-10-31 | Ibeji Investimentos E Servicos | TREATMENT FOR WATERPROOFING SKINS OF BOVINE ANIMALS DESIGNATEDLY BORN WITH CHROMIUM |
| AU2003209672A1 (en) | 2002-02-28 | 2003-09-09 | Council Of Scientific And Industrial Research | A process for making chrome tanned leathers |
| BRPI0203260B8 (en) * | 2002-08-09 | 2022-11-29 | Rhodia Poliamida E Especialidades Ltda | SKIN TANNING PROCESS. |
| EP1611258B1 (en) * | 2003-04-04 | 2012-10-03 | TFL Ledertechnik GmbH | Composition comprising chromium salts for tanning |
| BR0318684A (en) * | 2003-12-25 | 2006-12-12 | Council Scient Ind Res | processed process for leather manufacture |
| WO2012153203A1 (en) | 2011-05-10 | 2012-11-15 | Council Of Scientific & Industrial Research | Chrome tanning process for leather making reusing exhaust chrome liquor |
-
2016
- 2016-08-18 ES ES201631104A patent/ES2632994B1/en not_active Expired - Fee Related
- 2016-08-22 TW TW105126822A patent/TW201805434A/en unknown
- 2016-08-23 AR ARP160102576A patent/AR105795A1/en active IP Right Grant
- 2016-12-12 ZA ZA2016/08580A patent/ZA201608580B/en unknown
-
2017
- 2017-01-11 CN CN201780018098.5A patent/CN109072317B/en active Active
- 2017-01-11 BR BR112018068661-1A patent/BR112018068661B1/en active IP Right Grant
- 2017-01-11 MX MX2018011207A patent/MX2018011207A/en unknown
- 2017-01-11 EP EP17714567.9A patent/EP3430174B1/en active Active
- 2017-01-11 PT PT177145679T patent/PT3430174T/en unknown
- 2017-01-11 WO PCT/IN2017/050016 patent/WO2017158617A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060488A (en) * | 2012-12-26 | 2013-04-24 | 四川亭江新材料股份有限公司 | Environment-friendly type crust leather production method |
| CN103146850A (en) * | 2013-02-01 | 2013-06-12 | 四川大学 | Salt-free pickling-free amphoteric polymer chrome-free tanning agent |
| CN105063253A (en) * | 2015-08-10 | 2015-11-18 | 四川大学 | Salt-free high-chrome-absorption chrome tanning method for animal skin and application of salt-free high-chrome-absorption chrome tanning method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116829738A (en) * | 2020-12-14 | 2023-09-29 | 伊科斯克有限公司 | Process for tanning animal hides |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201805434A (en) | 2018-02-16 |
| EP3430174A1 (en) | 2019-01-23 |
| ZA201608580B (en) | 2018-05-30 |
| BR112018068661B1 (en) | 2023-01-31 |
| ES2632994A1 (en) | 2017-09-18 |
| AR105795A1 (en) | 2017-11-08 |
| BR112018068661A2 (en) | 2019-05-07 |
| ES2632994B1 (en) | 2018-06-28 |
| CN109072317B (en) | 2021-07-02 |
| WO2017158617A1 (en) | 2017-09-21 |
| PT3430174T (en) | 2020-08-26 |
| MX2018011207A (en) | 2019-05-30 |
| EP3430174B1 (en) | 2020-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101921881B (en) | Novel process for recycling waste leather-making liquid step by step | |
| CN103060488B (en) | Environment-friendly type crust leather production method | |
| CN102534056A (en) | Tanning production process capable of recycling waste water repeatedly from soaking to dyeing | |
| US6708531B1 (en) | Ecofriendly bio-process for leather processing | |
| CN104789715B (en) | One kind is salt-free to exempt from pickling short route less chrome tannage method | |
| CN102405297B (en) | Method for tanning animal skins | |
| EP3045548B1 (en) | Chromium tanning process with reduced waste discharge | |
| EP2881369A1 (en) | Tannery process with effluent recycling | |
| CN102120664B (en) | Process for recycling tanning waste liquid by steps | |
| Hutton et al. | Water pollution caused by leather industry: a review | |
| CN103525955A (en) | Tanning waste liquor stepwise recycling process with good effects | |
| CN105925735B (en) | One kind is salt-free to exempt from pickling short route bating method without chrome | |
| CN105063253A (en) | Salt-free high-chrome-absorption chrome tanning method for animal skin and application of salt-free high-chrome-absorption chrome tanning method | |
| Zhang et al. | An integrated pickling-bating technology for reducing ammonia-nitrogen and chloride pollution in leather manufacturing | |
| CN102703619A (en) | Energy-saving and environment-friendly mink skin tanning method | |
| CN109072317A (en) | Chrome tanning process | |
| CN104694675A (en) | Novel process for manufacturing leather with simple procedures and equipment | |
| US20160186275A1 (en) | Tanning Process With Reduced Waste Discharge | |
| WO2015104716A1 (en) | A composition for water free, pickle free chrome tanning of hides/skins | |
| CN103555866A (en) | Ecological automobile leather manufacturing method by adopting novel enzyme unhairing | |
| CN103725810B (en) | Method for tanning sheep shorn-pile | |
| CN108998595B (en) | High-stability vegetable oil leather fatting agent and preparation method thereof | |
| CN105586443B (en) | A kind of process for tanning of few salt pickling | |
| RU2126838C1 (en) | Method of leather production | |
| EP3704275B1 (en) | A composition useful for pre-treatment in waterless tanning and corresponding tanning process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |