CN101319254A - Cleaning treatment process for cow leather - Google Patents
Cleaning treatment process for cow leather Download PDFInfo
- Publication number
- CN101319254A CN101319254A CNA2008101385720A CN200810138572A CN101319254A CN 101319254 A CN101319254 A CN 101319254A CN A2008101385720 A CNA2008101385720 A CN A2008101385720A CN 200810138572 A CN200810138572 A CN 200810138572A CN 101319254 A CN101319254 A CN 101319254A
- Authority
- CN
- China
- Prior art keywords
- weight part
- minutes
- liming
- add
- rotated
- 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.)
- Pending
Links
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses a cleaning treatment process for cowhide, which orderly comprises process steps of soaking, liming, reliming, non-ammonium deliming softening and so on. The process is mainly characterized in that: soaking enzyme is mainly adopted in the step of the soaking, which greatly reduces the use level of a surfactant and the content of COD and BOD. Compared with the prior hair burning method, the liming and the reliming are characterized in that: a hair-saving liming process changes the process thought; the liming expansion is performed after hair saving and hair filtration, which reduces the content of ammonia nitrogen, the COD, the BOD and solid waste in wastewater. And waste liquid after the liming realizes recycling and achieves zero discharge. A non-ammonium deliming softening system is adopted, which reduces the content of the ammonia nitrogen in the wastewater. The use level and the discharge of sulfide and lime which are used to produce leather by the cowhide are reduced by 50 percent or so, an ammonium salt deliming process is saved, the content of the ammonia nitrogen is reduced by more than 90 percent, and the COD and suspended substances are reduced by more than 85 percent.
Description
Technical field
The present invention relates to the treatment process of leather industry ox-hide.
Background technology
Rawhide mainly is by collagen protein and Keratin sulfate, Saliva Orthana, and mucoid, sphaeroprotein, compositions such as elastin, the needed just collagen protein of process hides is removed from office needed feel and outward appearance in order to reach finished product, unwanted protein removal must be fallen.The conventional surfactant-based immersion agent of the main employing of production technique immersion can produce very high BOD.Conventional liming is to ruin a mao liming, and drawback is a lime, and sodium sulphite class material usage quantity is big, and residual quantity is a lot of in the waste liquid, and environmental pollution is serious; Hair-destroying process mainly be with on the skin with the hair fall with highly basic class material decomposition, this effect can produce a large amount of solid waste and very high COD, BOD, conventional deashing and softening method is used a large amount of Ammonia materials, and as ammonium sulfate and ammonium chloride, this makes that the ammonia-nitrogen content in the waste water is very high.So conventional ox-hide is handled to environmental pollution and is brought very big pressure.
Summary of the invention
Technical problem to be solved by this invention provides a kind of cleaning treatment process for cow leather, alleviates environmental pollution, is fit to requirement on environmental protection.
Cleaning treatment process for cow leather of the present invention is characterized in that comprising successively following treatment step:
(1) immersion: get the fur 100 weight parts rotary drum of packing into, add 300 weight parts waters, 0.8～1.2 weight part soda ash, 0.1～0.15 weight part sterilant, 0.1～0.15 weight part grease-removing agent and 0.3～0.5 weight part soaking enzyme, rotated 60～90 minutes, the rotary drum rotating speed is 8r/m, according to per hour rotating 5～8 minutes, continue 18 ~ 24 hours then;
(2) liming: the fur control water purification after the immersion, squeeze into the liming waste liquid after precipitation, filtration, get fur 100 weight parts after the immersion, add 300 weight part liming waste liquids, the liming agent of 0.6～1 weight part and 0.5～1 weight part white lime rotated in rotary drum 40～60 minutes, adding 0.4～0.6 weight part sodium sulphite again rotated 40～60 minutes, begin the filter hair, filter hair knot bundle adds 0.3～0.4 weight part Sodium sulfhydrate and 1～1.5 weight part white lime and rotated 30～40 minutes;
(3), multiple ash: add 0.5～1 weight part white lime again and carry out multiple ash;
(4), get 100 weight part alkali leather jackets drum, the multiple ash of adding 2～2.5 weight part white limes, the clean lixivium of control behind the multiple ash behind the split, add that water is vexed to be washed once, the control water purification is adjusted temperature to 28 ℃～30 ℃, add water 60～80 weight parts, adding 1.5～1.7 weight parts does not have the ammonium deliming agent, changes and checks otch full impregnated, PH=8.2～8.4 in 60～90 minutes, add the not macerating enzyme of ammonium salt-containing of 1～1.5 weight part then, rotate and stopped drum in 60～90 minutes, PH=8.0～8.2, washing then;
(5), in above-mentioned drum, add 20 ℃～22 ℃ water 60～80 weight parts, add sodium-chlor 6～8 weight parts, rotated 10～20 minutes, formic acid 0.3～0.5 weight part, sulfuric acid 0.8～1.0 weight part rotated 90～120 minutes, stopped drum after 3 hours, entered tanning.
The 3 described multiple ash times of above-mentioned steps are at least 16 hours, and the described multiple ash time of step 4 is 16 ~ 18 hours.
Soaking enzyme described in the above-mentioned steps, sterilant, liming agent, no ammonia deliming agent, no ammonia macerating enzyme can adopt the conventional or general product of leather industry.Preferred soaking enzyme adopts proteolytic enzyme, as Germany, and TRUPOWETSA of Tang Pule company (soup Pood SA) or the PELLVIT C of De Rui company (skin Witter C); The De Saibei LG that Sichuan De Saier company produces.The sterilant such as the U.S., the BUSAN 85 of Bark Man (cloth gloomy 85), BUSAN 1236 (cloth gloomy 1236), BUSAN 40L (the gloomy 40L of cloth); The smart KF of the moral plug of Sichuan De Saier company.Grease-removing agent can be used Switzerland, the BORRON A of TFL company (glass swell A), BORRON T (glass swell T); The wetting agent jfc that Zhejiang brother company produces.The ERHAVIT MB of the available TFL of liming agent company (the grey special MB of strategic point), ERHAVIT SRI (the grey special SRI of strategic point), ERHAVIT K2 (the grey special K2 of strategic point).No ammonia deliming agent can be used the DEAMASCAL CD (De Masi detains CD) of TFL company, DEAMASCAL F (De Masi detains F); The smart TM of the moral plug that Sichuan De Saier company produces.No ammonia macerating enzyme such as Switzerland, the OROPON ON2 of TFL company (softening precious ON2); The De Saibei AE that Sichuan De Saier company produces.
Advantage of the present invention:
1, mainly adopts soaking enzyme in the immersion step, significantly reduced the usage quantity of tensio-active agent, reduced the content of COD, BOD.
2, liming is compared with traditional hair-destroying process with the characteristics of multiple ash, the technology thinking of having protected hair liming process reform, protect earlier hair filter hair again liming expand, reduced the content of the ammonia nitrogen in the waste water, COD, BOD, solid waste.The gross weight that leaches accounts for 22% of tare weight, and it is about 60% that whole liming process material consumption is saved, and the waste liquid after the liming realized recycling, and has accomplished zero release.The alkali skin expands evenly, the surface cleaning, and the growth line is opened, and rate of grade improves about 20% than hair-destroying process.
3, the no ammonium deashing and softening of employing system has reduced the ammonia-nitrogen content in the waste water.
4, ox-hide process hides sulfide, lime use and quantity discharged minimizing about 50%, economize deammoniation salt deliming technology, and ammonia-nitrogen content reduces more than 90%, and COD, suspended substance reduce more than 85%.
Embodiment
Below in conjunction with embodiment the present invention is described, but does not limit the present invention.
Embodiment 1:
(1) immersion: get fur 100 weight parts dress drum, add 300 weight parts waters, 0.8 weight part soda ash, 0.1 weight part sterilant BUSAN 85 (cloth gloomy 85), 0.12 weight part grease-removing agent BORRON A and 0.4 weight part soaking enzyme TRUPOWET SA, rotated 80 minutes, according to per hour rotating 6 minutes, continue 20 hours then;
(2) liming: the fur control water purification after the immersion, squeeze into batch liming waste liquid of going up after precipitation, filtration, with fur 100 weight parts after the immersion, add 300 weight part liming waste liquids, the liming agent EVHAVIT MB of 0.8 weight part and 0.6 weight part white lime changeed 40 minutes, adding 0.4 weight part sodium sulphite again changeed 60 minutes, begin the filter hair, filter hair knot bundle after 1 hour, adding 0.3 weight part Sodium sulfhydrate and 1.5 weight part white limes changeed 40 minutes;
(3) multiple ash: add 0.7 weight part white lime again and carried out multiple grey 16 hours;
(4) get 100 weight part alkali skins (ox-hide after step 3 is handled) dress drum behind the split, added the multiple ash of 2 weight part white limes 18 hours, the clean lixivium of multiple ash back control, add that water is vexed to be washed once, the control water purification, adjust temperature to 28 ℃～30 ℃, add water 70 weight parts, adding 1.5 weight parts does not have ammonium deliming agent DERMASCAL CD, changes and checks the otch full impregnated in 80 minutes, PH=8.3, add the not macerating enzyme OROPON K2 of ammonium salt-containing of 1.3 weight parts then, rotate and stopped drum, PH=8.0 in 60 minutes, washing then, water lotion is drained;
(5) in above-mentioned drum, add 20 ℃～22 ℃ water 80 weight parts, add Industrial Salt (sodium-chlor) 7 weight parts, rotated 15 minutes, formic acid 0.5 weight part, sulfuric acid 1.0 weight parts rotated 100 minutes, stopped drum after 3 hours, entered tanning.
Contrast after testing, ammonia-nitrogen content is 1930mg/L in the employing common process discharge of wastewater liquid, COD---5430mg/L, suspended substance---5060mg/L.Adopt that ammonia-nitrogen content is 55mg/L in the processing wastewater relief liquor of the present invention, COD1540mg/L, suspended substance 372mg/L.
Embodiment 2:
(1) immersion: get fur 100 weight parts dress drum, add 300 weight parts waters, 1.2 weight part soda ash, 0.15 weight part sterilant (BUSAN 1236), 0.15 weight part grease-removing agent (BORRON T) and 0.5 weight part soaking enzyme PELLVITC), rotated 60 minutes, according to per hour rotating 8 minutes, continue 24 hours then;
(2) liming: the fur control water purification after the immersion, squeeze into batch liming waste liquid of going up after precipitation, filtration, with fur 100 weight parts after the immersion, add 300 weight part liming waste liquids, liming agent of 1 weight part (ERHAVIT SRI) and 0.9 weight part white lime, 60 minutes, adding 0.6 weight part sodium sulphite again changeed 50 minutes, begin the filter hair, filter hair knot bundle after 1 hour adds 0.4 weight part Sodium sulfhydrate and 1 weight part white lime changes 35 clocks;
(3) multiple ash: add 1 weight part white lime again and carried out multiple grey 16 hours;
(4) get 100 weight part alkali skins (ox-hide after step 3 is handled) dress drum behind the split, added the multiple ash of 2.5 weight part white limes 16 hours, the clean lixivium of multiple ash back control, add that water is vexed to be washed once, the control water purification, adjust temperature to 28 ℃～30 ℃, add water 60 weight parts, adding 1.7 weight parts does not have ammonium deliming agent (Switzerland, the DEAMASCAL F of TFL company), change and checked the otch full impregnated in 90 minutes, PH=8.4 adds the not macerating enzyme of ammonium salt-containing (OROPONON2 of TFL company) of 1.5 weight parts then, rotate and stopped drum in 90 minutes, PH=8.2, washing then, water lotion is drained;
(5) in above-mentioned drum, add 20 ℃～22 ℃ water 60 weight parts, add Industrial Salt (sodium-chlor) 6 weight parts, rotated 15 minutes, formic acid 0.3 weight part, sulfuric acid 0.8 weight part rotated 120 minutes, stopped drum after 3 hours, entered tanning.
Contrast after testing, ammonia-nitrogen content is 1865mg/L in the employing common process discharge of wastewater liquid, COD---6010mg/L, suspended substance---5170mg/L.Adopt that ammonia-nitrogen content is 50mg/L in the processing wastewater relief liquor of the present invention, COD1640mg/L, suspended substance 296mg/L.
Claims (4)
1, a kind of cleaning treatment process for cow leather is characterized in that comprising successively following treatment step:
(1) immersion: get the fur 100 weight parts rotary drum of packing into, add 300 weight parts waters, 0.8～1.2 weight part soda ash, 0.1～0.15 weight part sterilant, 0.1～0.15 weight part grease-removing agent and 0.3～0.5 weight part soaking enzyme, rotated 60～90 minutes, the rotary drum rotating speed is 8r/m, according to per hour rotating 5～8 minutes, continue 18 ~ 24 hours then;
(2) liming: the fur control water purification after the immersion, squeeze into the liming waste liquid after precipitation, filtration, get fur 100 weight parts after the immersion, add 300 weight part liming waste liquids, the liming agent of 0.6～1 weight part and 0.5～1 weight part white lime rotated in rotary drum 40～60 minutes, adding 0.4～0.6 weight part sodium sulphite again rotated 40～60 minutes, begin the filter hair, filter hair knot bundle adds 0.3～0.4 weight part Sodium sulfhydrate and 1～1.5 weight part white lime and rotated 30～40 minutes;
(3), multiple ash: add 0.5～1 weight part white lime again and carry out multiple ash;
(4), get 100 weight part alkali leather jackets drum, the multiple ash of adding 2～2.5 weight part white limes, the clean lixivium of control behind the multiple ash behind the split, add that water is vexed to be washed once, the control water purification is adjusted temperature to 28 ℃～30 ℃, add water 60～80 weight parts, adding 1.5～1.7 weight parts does not have the ammonium deliming agent, changes and checks otch full impregnated, PH=8.2～8.4 in 60～90 minutes, add the not macerating enzyme of ammonium salt-containing of 1～1.5 weight part then, rotate and stopped drum in 60～90 minutes, PH=8.0～8.2, washing then;
(5), in above-mentioned drum, add 20 ℃～22 ℃ water 60～80 weight parts, add sodium-chlor 6～8 weight parts, rotated 10～20 minutes, formic acid 0.3～0.5 weight part, sulfuric acid 0.8～1.0 weight part rotated 90～120 minutes, stopped drum after 3 hours, entered tanning.
2, treatment process according to claim 1 is characterized in that the described soaking enzyme of step 1 adopts proteolytic enzyme, is selected from soup Pood SA, skin Witter C and De Saibei LG.
3, treatment process according to claim 1, it is characterized in that described sterilant adopts that cloth is gloomy 85, cloth is gloomy 1236, the gloomy 40L of cloth and the smart KF of De Sai, grease-removing agent adopts the grand A of glass, the grand T of glass and wetting agent jfc, the grey special MB of strategic point, the grey special SRI of strategic point or the grey special K2 of strategic point are adopted in the liming agent, no ammonia deliming agent adopts De Masi button CD, De Masi button F or the smart TM of moral plug, and no ammonia macerating enzyme adopts softening precious 0N2 or De Saibei AE.
4, treatment process according to claim 1 is characterized in that the described multiple ash time of step 3 be at least 16 hours, and the described multiple ash time of step 4 is 16 ~ 18 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101385720A CN101319254A (en) | 2008-07-22 | 2008-07-22 | Cleaning treatment process for cow leather |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101385720A CN101319254A (en) | 2008-07-22 | 2008-07-22 | Cleaning treatment process for cow leather |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101319254A true CN101319254A (en) | 2008-12-10 |
Family
ID=40179528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101385720A Pending CN101319254A (en) | 2008-07-22 | 2008-07-22 | Cleaning treatment process for cow leather |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101319254A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITRE20100049A1 (en) * | 2010-06-14 | 2010-09-13 | Rinaldo Cogolo | METHOD FOR SKIN TREATMENT |
| CN101982547A (en) * | 2010-10-18 | 2011-03-02 | 海宁森德皮革有限公司 | Light-proof and sweat-proof leathers for steering wheels |
| CN101993958A (en) * | 2010-11-23 | 2011-03-30 | 福建冠兴皮革有限公司 | Method for recycling waste tanning liming liquid |
| CN102534057A (en) * | 2012-01-16 | 2012-07-04 | 宁夏西部皮草有限公司 | Method for tanning Tan sheep skin with nano softening enzyme |
| CN101497929B (en) * | 2009-02-26 | 2012-07-25 | 温州大学 | Hair protecting, dehairing and liming method for cattle hide tanning |
| CN103849693A (en) * | 2014-01-21 | 2014-06-11 | 刘志学 | Novel splitting method for cowhide leather making |
| CN104313202A (en) * | 2014-10-27 | 2015-01-28 | 浙江理工大学 | Softening method aiming at hardened fur cultural relics |
-
2008
- 2008-07-22 CN CNA2008101385720A patent/CN101319254A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497929B (en) * | 2009-02-26 | 2012-07-25 | 温州大学 | Hair protecting, dehairing and liming method for cattle hide tanning |
| WO2011158096A2 (en) | 2010-06-14 | 2011-12-22 | Rinaldo Cogolo | A method for treating hides |
| ITRE20100049A1 (en) * | 2010-06-14 | 2010-09-13 | Rinaldo Cogolo | METHOD FOR SKIN TREATMENT |
| WO2011158096A3 (en) * | 2010-06-14 | 2012-02-16 | Rinaldo Cogolo | A method for treating hides |
| CN101982547A (en) * | 2010-10-18 | 2011-03-02 | 海宁森德皮革有限公司 | Light-proof and sweat-proof leathers for steering wheels |
| CN101982547B (en) * | 2010-10-18 | 2013-05-29 | 海宁森德皮革有限公司 | Light-proof and sweat-proof leathers for steering wheels |
| CN101993958A (en) * | 2010-11-23 | 2011-03-30 | 福建冠兴皮革有限公司 | Method for recycling waste tanning liming liquid |
| CN101993958B (en) * | 2010-11-23 | 2013-08-21 | 福建冠兴皮革有限公司 | Method for recycling waste tanning liming liquid |
| CN102534057A (en) * | 2012-01-16 | 2012-07-04 | 宁夏西部皮草有限公司 | Method for tanning Tan sheep skin with nano softening enzyme |
| CN102534057B (en) * | 2012-01-16 | 2013-12-25 | 宁夏西部皮草有限公司 | Method for tanning Tan sheep skin with nano softening enzyme |
| CN103849693A (en) * | 2014-01-21 | 2014-06-11 | 刘志学 | Novel splitting method for cowhide leather making |
| CN104313202A (en) * | 2014-10-27 | 2015-01-28 | 浙江理工大学 | Softening method aiming at hardened fur cultural relics |
| CN104313202B (en) * | 2014-10-27 | 2016-05-11 | 浙江理工大学 | A kind of softening method for sclerosis peltry historical relic |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101319254A (en) | Cleaning treatment process for cow leather | |
| CN101445843B (en) | Method for carrying out unhairing and liming treatment without dust and akali sulphide during buffalo hide tanning | |
| CN101760569B (en) | Leather making bio-pretreatment method | |
| CN101265505A (en) | Ashless and alkali sulfide free depilation liming treatment method for preparing leather from raw sheep skin | |
| CN101509045A (en) | Sodium sulfide-free, lime-free depilation caustic dip method for lining leather of high-grade pig leather shoes | |
| CN102199675A (en) | Clean process for producing leather by using sturgeon skin | |
| CN101265506B (en) | Ashless and alkali sulfide free depilation liming treatment method for preparing leather from goatskin | |
| CN104673943A (en) | Method for manufacturing environment-friendly ecological tanned lamb skin | |
| CN107893133A (en) | A kind of process hides ox-hide enzymatic depilation method | |
| CN103525955A (en) | Tanning waste liquor stepwise recycling process with good effects | |
| CN109628663A (en) | A kind of blue wet yak leather preparation process | |
| CN102994657B (en) | Method for treating slunk | |
| JPH0140880B2 (en) | ||
| CN100497659C (en) | organosilicon and enzyme hair-protection and hair-removing composition and method for hair-protection and hair-removing animal skin by the same | |
| CN102952907B (en) | Method for depilating animal skin | |
| CN112608686A (en) | Liming method for preparing bone gelatin and application | |
| CN103555866B (en) | A kind of eco-car leather manufacture method adopting novel enzyme unhairing | |
| CN113136461B (en) | Method for unhairing in main soaking process by using complex enzyme preparation | |
| CN102876818B (en) | Ammonia-free softened composite enzyme preparation and application thereof in leather softening technology | |
| CN110129489A (en) | A kind of no chromic acid leather makees method | |
| CN103320550B (en) | A kind of micro-enzyme alkaline process protects the method for leather-making of hair depilation | |
| CN107619887A (en) | A kind of method for leather-making for protecting hair depilation | |
| CN102071268A (en) | Dry hair-saving unhair treatment method of raw hide | |
| US3133002A (en) | Treatment of hides | |
| CN114807460A (en) | Hair-saving unhairing leather-making process method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20081210 |