CN101985668A - Leather making process for retanning by indefinitely recycling waste liquid - Google Patents
Leather making process for retanning by indefinitely recycling waste liquid Download PDFInfo
- Publication number
- CN101985668A CN101985668A CN2010101746177A CN201010174617A CN101985668A CN 101985668 A CN101985668 A CN 101985668A CN 2010101746177 A CN2010101746177 A CN 2010101746177A CN 201010174617 A CN201010174617 A CN 201010174617A CN 101985668 A CN101985668 A CN 101985668A
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- China
- Prior art keywords
- retanning
- waste liquid
- minute
- acid
- changeed
- Prior art date
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- 239000007788 liquid Substances 0.000 title claims abstract description 30
- 239000002699 waste material Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title abstract description 12
- 239000010985 leather Substances 0.000 title abstract description 8
- 238000004064 recycling Methods 0.000 title abstract 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000005516 engineering process Methods 0.000 claims description 10
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 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 claims description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 3
- 235000019253 formic acid Nutrition 0.000 claims description 3
- 239000001632 sodium acetate Substances 0.000 claims description 3
- 229960004249 sodium acetate Drugs 0.000 claims description 3
- 235000017281 sodium acetate Nutrition 0.000 claims description 3
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 claims description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 238000013038 hand mixing Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 description 5
- 239000011651 chromium Substances 0.000 description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention provides a leather making process for retanning by indefinitely recycling waste liquid. The process is characterized by greatly reducing the using amount of chromium powder and other retanning materials by 40 to 60 percent, and realizing indefinite recycling of all waste liquids, and the retanning effect is better than that of the conventional process.
Description
Technical field
The invention belongs in the leather production technical field and make full use of starting material, reduce the green circulation technology of disposal of pollutants, release the leather-making technology that a kind of recycle in indefinitely waste liquid carries out retanning herein.
Background technology
Now, China has become the leather big producing country that generally acknowledges in the world, and still, developing rapidly of leather industry also caused serious environmental pollution, the wasting of resources and ecological damage.Chrome Tanning Wastewater is that tannery pollutes one of the most serious waste water, be wherein unique heavy metal contamination, but chrome tanning can give leather good performance, is the mainstream technology of leather tanning always, almost can't shake.In the chrome tanning process, the effective rate of utilization of chromium generally has only 60%-70%, and the chromic salts of all the other 30%-40% remains in the waste water, Cr in its useless chrome liquor
2O
3Content is up to 2000mg/L-5000mg/L.The Cr of composite wastewater
2O
3Concentration is also more than 30mg/L.So discharge, not only can cause great pollution, and can produce the great wasting of resources environment with the useless chrome liquor of high-content.
At present, the method of both at home and abroad chromate waste water being handled mainly contains: chemical reduction method, electrolytic process, membrane separation process, absorption method, ion exchange method, biological process etc., height, efficient are low, weak effect can't reach real pollution treatment purpose but its operational process often spends.
Summary of the invention
Purpose of the present invention: recycle the retanning waste liquid indefinitely; outside removing the normal volatilization under the state of nature and inevitably spilling; the rate of recovery of waste liquid can reach 100%; thoroughly eradicated the right problem of serious dirt that the chroming waste liquor discharging brings, a large amount of simultaneously chromium powder and other relevant chemical materials saved.Save chromium powder 40%-60%, save other associated materials 40%-60%, save energy about 20%, and guarantee the retanning effect, and shrinkage temperature improves more than 1 ℃ than common process, and grain is careful, smooth.The finished product of Sheng Chaning is removed from office every performance index and is all reached requirement thus, and has improved the degree of packing and the fullness ratio of finished leather.
For achieving the above object, technical scheme of the present invention is as follows:
The waste liquid liquid storage tank is set near the retanning rotary drum, and acid proof pump is set in order to pumping waste liquid usefulness.Whipping appts is set, also available hand mixing in the waste liquid pool.From entering retanning waste liquid liquid storage tank behind the solid substance in the waste liquid elimination waste liquid of retanning operation, stir, to be ready for use on down the retanning of batch skin; The technology of utilizing the retanning waste liquid to carry out retanning is: in graywall weight, transfer to 0.4-2.5 with will the give up pH value of chrome liquor of hydrochloric acid or sulfuric acid or other acid, carry out retanning then.Technology is: give up retanning liquid, temperature of 120%-250% transfers to 32 ℃-42 ℃, 0.1%-0.5% formic acid (or acetic acid), rotary drum rotated 20-50 minute, 0.5%-2.5% acrylic acid double tanning agent (or other retanning agent), changeed 0.5%-2.0% chromium powder, 0.2%-0.6% fatting agent 10-40 minute, changeed 30-90 minute, the 0.5%-1.5% alkanoic changeed 0.3%-1.0 sodium formiate (or sodium-acetate) 20-50 minute, 0.1%-0.5 sodium bicarbonate, changeed 30-90 minute, change 10 minutes/stopped 3-8 time continuously 50 minutes, or stop drum and spend the night, the pH value requires 3.2-4.2.
This such scheme, the consumption of various chemical materials and operating time, working order, heating and cooling amplitude etc. all can be made significantly and adjusting.The percentage ratio of used chemical materials is in the weight of skin.
Embodiment
Below by example the present invention is carried out concrete description and further instruction.
Embodiment
Technology is: 150% useless retanning liquid, temperature transfer to 36 ℃, 0.3% formic acid (or acetic acid), and rotary drum rotated 30 minutes, 1.5% acrylic acid double tanning agent (or other retanning agent) changeed 1.0 chromium powders 30 minutes, 0.3% fatting agent changeed 1.0% alkanoic 60 minutes, changeed 0.8 sodium formiate (or sodium-acetate), 0.2 sodium bicarbonate 30 minutes, changeed 60 minutes, change 10 minutes/stopped continuous 5 times 50 minutes, or stop drum and spend the night, the pH value requires 3.7-4.0.
Under the situation that does not break away from spirit of the present invention or substantive features, can implement the present invention with other form, with reference to claim but not above-mentioned specification sheets, as indication scope of the present invention.
Claims (4)
1. on retanning rotary drum side retanning waste liquid liquid storage tank is set,, stirs, to be ready for use on down the retanning of batch skin from entering retanning waste liquid liquid storage tank behind the solid substance in the waste liquid elimination waste liquid of retanning operation; The technology of utilizing the retanning waste liquid to carry out retanning is: in graywall weight, transfer to 0.4-2.5 with will the give up pH value of chrome liquor of hydrochloric acid or sulfuric acid or other acid, carry out retanning then.Technology is: give up retanning liquid, temperature of 120%-250% transfers to 32 ℃-42 ℃, 0.1%-0.5% formic acid (or acetic acid), rotary drum rotated 20-50 minute, 0.5%-2.5% acrylic acid double tanning agent (or other retanning agent), changeed 0.5%-2.0% chromium powder, 0.2%-0.6% fatting agent 10-40 minute, changeed 30-90 minute, the 0.5%-1.5% alkanoic changeed 0.3%-1.0 sodium formiate (or sodium-acetate) 20-50 minute, 0.1%-0.5 sodium bicarbonate, changeed 30-90 minute, change 10 minutes/stopped 3-8 time continuously 50 minutes, or stop drum and spend the night, the pH value requires 3.2-4.2.
2. the consumption of the various chemical materials in the right 1, heating and cooling amplitude, operating time and working order etc. all can be made significantly and adjusting.
Right 1,2, in percentage ratio in the weight of skin.
4. the waste liquid liquid storage tank is set near the retanning rotary drum, and acid proof pump is set in order to pumping waste liquid usefulness.Whipping appts is set, also available hand mixing in the waste liquid pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101746177A CN101985668A (en) | 2010-05-04 | 2010-05-04 | Leather making process for retanning by indefinitely recycling waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101746177A CN101985668A (en) | 2010-05-04 | 2010-05-04 | Leather making process for retanning by indefinitely recycling waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101985668A true CN101985668A (en) | 2011-03-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101746177A Pending CN101985668A (en) | 2010-05-04 | 2010-05-04 | Leather making process for retanning by indefinitely recycling waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101985668A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586503A (en) * | 2012-01-18 | 2012-07-18 | 朗盛（无锡）化工有限公司 | Method for treating leather by using tannery wastewater and method for producing leather |
| CN102690903A (en) * | 2012-06-11 | 2012-09-26 | 科凯精细化工（上海）有限公司 | Process method for retanning and fatliquoring with phosphorus-containing fire retardant |
| WO2014169564A1 (en) * | 2013-04-18 | 2014-10-23 | Zhang Zhuangdou | Tannery waste liquid step-by-step recycling process having improved effect |
| WO2015081624A1 (en) * | 2013-12-04 | 2015-06-11 | 张壮斗 | Tanning process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4430290A1 (en) * | 1994-08-26 | 1996-02-29 | Basf Ag | Leather mfr. with reduced chemical consumption and amt. of waste liquor |
| CN1807655A (en) * | 2006-02-20 | 2006-07-26 | 陕西科技大学 | Production method of leather in which hexavalent chromium content reaches the standard |
| CN101423875A (en) * | 2008-10-21 | 2009-05-06 | 温州大学 | Process technology for recycling and reuse waste chrome liquor in retanning |
| CN101649362A (en) * | 2009-08-28 | 2010-02-17 | 温州大学 | Leather retanning filling agent in branched structure and preparation method thereof |
-
2010
- 2010-05-04 CN CN2010101746177A patent/CN101985668A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4430290A1 (en) * | 1994-08-26 | 1996-02-29 | Basf Ag | Leather mfr. with reduced chemical consumption and amt. of waste liquor |
| CN1807655A (en) * | 2006-02-20 | 2006-07-26 | 陕西科技大学 | Production method of leather in which hexavalent chromium content reaches the standard |
| CN101423875A (en) * | 2008-10-21 | 2009-05-06 | 温州大学 | Process technology for recycling and reuse waste chrome liquor in retanning |
| CN101649362A (en) * | 2009-08-28 | 2010-02-17 | 温州大学 | Leather retanning filling agent in branched structure and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586503A (en) * | 2012-01-18 | 2012-07-18 | 朗盛（无锡）化工有限公司 | Method for treating leather by using tannery wastewater and method for producing leather |
| CN102586503B (en) * | 2012-01-18 | 2014-02-26 | 朗盛（常州）有限公司 | Method for treating leather by using tannery wastewater and method for producing leather |
| CN102690903A (en) * | 2012-06-11 | 2012-09-26 | 科凯精细化工（上海）有限公司 | Process method for retanning and fatliquoring with phosphorus-containing fire retardant |
| WO2014169564A1 (en) * | 2013-04-18 | 2014-10-23 | Zhang Zhuangdou | Tannery waste liquid step-by-step recycling process having improved effect |
| WO2015081624A1 (en) * | 2013-12-04 | 2015-06-11 | 张壮斗 | Tanning process |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110316 |
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| C49 | Reinstatement of patent right or utility model | ||
| RA01 | Restoration of patent right |
Former decision: deemed withdrawal of patent application after publication Former decision publication date: 20140115 |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110316 |