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
- Authority
- CN
- China
- Prior art keywords
- retanning
- waste liquid
- minute
- acid
- changeed
- 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
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
ID=43710068
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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101985668A (en) | Leather making process for retanning by indefinitely recycling waste liquid | |
| CN102041321B (en) | Leather manufacturing process by pickling and tanning salt-free and chrome-free recycled waste liquid | |
| CN107597073A (en) | A kind of industrial production process of resin cation base load zirconium nano-compound adsorbent | |
| CN102534055A (en) | Ashless (or less-ash) liming unhairing process by recycling waste lime liquor indefinitely | |
| CN102234694A (en) | Salt-free leather-making process capable of carrying out acid-picking chrome tannage by indefinitely recycling waste liquid | |
| CN106630008A (en) | Novel method for chrome tanning wastewater treatment and chrome recycling | |
| CN102559950B (en) | A kind of waste liquid that circulates carries out the leather-making technology of the large-scale production of pickling chrome tanning | |
| CN108358430A (en) | A kind of Treatment of Sludge conditioning medicament and its application method | |
| CN103288232A (en) | Resourceful treatment apparatus and method for waste liquid of chlorohydric acid pickling of steel | |
| CN102559948A (en) | Sheepskin leather making process with infinite cycling of waste liquid for liming (or restoring ash alkalinity) | |
| CN102965455A (en) | Method for preparing basic chromium sulfate tanning liquor by using tanning chromium sludge | |
| CN106186435B (en) | Integrated treatment and the reuse method of a kind of Benzene Chloride waste liquid and waste residue | |
| CN102534059B (en) | A kind of recycle waste liquid carries out the leather-making technology of retanning | |
| CN101797471A (en) | Treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment | |
| CN207108731U (en) | Aluminum profile extrusion wastewater treatment equipment | |
| CN207108677U (en) | A kind of cleaning system for handling high-concentration fluorine-contained waste liquid | |
| CN108640606A (en) | A kind of composite sludge is non-burning brick | |
| CN106430360A (en) | Efficient sewage treatment agent based on xanthan gum and preparation method thereof | |
| CN102534062B (en) | A kind of recycle waste liquid carries out the leather-making technology neutralized | |
| CN205773756U (en) | Automatic Cycle sewage disposal system | |
| CN201999825U (en) | Sodium carboxy methyl cellulose industrial sewage recycling device | |
| CN102336487A (en) | Method for recycling chromium sludge from waste liquor obtained through leather tanning | |
| CN215102624U (en) | Wet attitude dyeing and finishing waste liquid cyclic utilization system of tannery | |
| CN205473070U (en) | Waste water and mixed recycle's of sewage device | |
| CN206927636U (en) | A kind of dehydrogenation of isobutane device waste water reclaiming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110316 |
|
| 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 |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110316 |