CN101407365A - Method for processing chroming waste liquor - Google Patents
Method for processing chroming waste liquor Download PDFInfo
- Publication number
- CN101407365A CN101407365A CNA2007100613833A CN200710061383A CN101407365A CN 101407365 A CN101407365 A CN 101407365A CN A2007100613833 A CNA2007100613833 A CN A2007100613833A CN 200710061383 A CN200710061383 A CN 200710061383A CN 101407365 A CN101407365 A CN 101407365A
- Authority
- CN
- China
- Prior art keywords
- chromium
- processing
- waste liquor
- chroming
- chromium ion
- 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 relates to a method for processing chrome tannage waste fluid, belonging to the fields of the manufacture technology of light industrial products and environment protection. The invention aims at providing a method for processing and reusing the chrome tannage waste fluid and the aim is realized through the following technical scheme: the soaking, depilation, alkali swelling, acid etch, tanning and other processing procedures in leather production are carried out according to normal methods; chrome tannage waste fluid is collected, with the skin bit or other impurities in the fluid being removed; a chromium ion trapping agent is added to trap chromium ions in the fluid to form solids precipitation; and through separation, macromolecule chromium and supernatant which is suitable for acid etch are gained. With the use of the invention, the supernatant and the macromolecule chromium solid content obtained can be both used for the acid etch and chrome tannage of leather in follow-up processes.
Description
The present invention relates to a kind of method of handling chroming waste liquor, and will use Chrome Tanning Wastewater and the macromole that this treatment process obtains to cooperate chromium to carry out reutilization technology, belong to light industrial goods manufacturing technology and field of environment protection.
Chrome tanning is the operation of a key in the leather manufacturing processed.Because in tannery, chromium is not absorbed fully by collegen filament, cause to contain a large amount of trivalent chromic ions in the chroming waste liquor, they are discharged together with the neutral salt that adds in the chrome tanning pickling procedure in early stage, and environment is polluted.So the pollution that solves chroming waste liquor is an important technological problems during leather is made.
The traditional method of handling chroming waste liquor is the alkaline chemical precipitation method.Promptly in waste liquid, add a certain amount of alkaline matter (as sodium hydroxide), make chromium ion form chromium hydroxide precipitation, from solution, filter out then.This method exists serious technology barrier, and the one, because the particle diameter of chromium hydroxide is less, filtering difficulty is big; The 2nd, because the chromium of oxyhydroxide form has changed the complex structure form in solution, thereby lost flexibility, be difficult to be used in again tanning, cause the wasting of resources; The 3rd, because the waste liquid that this method is handled is alkaline state, can't utilize again or directly discharging, also must carry out secondary treatment.
The object of the present invention is to provide a kind of convenient method of handling chroming waste liquor.So that chroming waste liquor is effectively handled and utilization again.
The objective of the invention is to be achieved through the following technical solutions:
The preceding processing treatment of tanning of leather production is carried out according to a conventional method, behind the chrome tanning chroming waste liquor is collected, remove by filter skin bit wherein, in waste liquid, add the chromium ion trapping agent, make the chromium ion in itself and the chroming waste liquor form solids precipitation, separate waste liquid then and obtain the neutral supernatant liquor that macromole chromium and suitable pickling are used.
The treatment process of chroming waste liquor and step comprise as follows among the present invention:
(1) according to a conventional method animal skin is carried out processing before the chrome tanning, behind the chrome tanning with waste collection.
(2) according to following method chroming waste liquor is handled:
In waste liquid, add chromium ion trapping agent (its consumption is decided on content of chromium ion),
Stirring action reacted 20～40 minutes down,
Slowly add adjusting PH with base value to 6.0～9.0,
Waste liquid is filtered, obtain supernatant liquor and macromole chromium solid substance respectively.
(3) according to ordinary method to chrome tanning after wet blue leather carry out the back ornamenting.
The pickling, the chrome tanning that utilize supernatant liquor that the present invention obtains and macromole chromium solid substance all to can be used for follow-up leather.
Claims (3)
1. a method of handling chroming waste liquor is characterized in that, uses a kind of chromium ion trapping agent that chromium ion is separated from waste liquid, and waste liquid of handling and isolating chromium all can be used further to the leather manufacturing.
2. the method for processing chroming waste liquor as claimed in claim 1 is characterized in that, applying method and step that the present invention handles in the chroming waste liquor method comprise as follows:
(1) chroming waste liquor is collected, and removed by filter the skin slag.
(2) in waste liquid, add the chromium ion trapping agent, reacted 20 to 40 minutes.
(3) progressively in waste liquid, add alkali, the pH value is transferred to 6-9.
(4) the macromole chromium solid substance with trapping agent and chromium ion formation carries out filtering separation.
(5) supernatant liquor is used for pickling procedure.
(6) macromole chromium solid substance is used for the preparation of chrome tanning agent.
3. the method for processing chroming waste liquor as claimed in claim 1 is characterized in that, employed chromium ion trapping agent is special oxidable type heavy metal capturing agent among the present invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100613833A CN101407365A (en) | 2007-10-10 | 2007-10-10 | Method for processing chroming waste liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100613833A CN101407365A (en) | 2007-10-10 | 2007-10-10 | Method for processing chroming waste liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101407365A true CN101407365A (en) | 2009-04-15 |
Family
ID=40570608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100613833A Pending CN101407365A (en) | 2007-10-10 | 2007-10-10 | Method for processing chroming waste liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101407365A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819021A (en) * | 2014-02-27 | 2014-05-28 | 南昌航空大学 | Method for processing heavy metal waste pipe |
| CN113955838A (en) * | 2021-09-23 | 2022-01-21 | 北京化工大学 | Method for co-processing electroplating waste residue and chromium-containing heavy metal ion waste liquid |
| CN115465968A (en) * | 2022-09-16 | 2022-12-13 | 嘉兴学院 | Method for separating and recovering chromium in chrome tanning waste liquid |
-
2007
- 2007-10-10 CN CNA2007100613833A patent/CN101407365A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819021A (en) * | 2014-02-27 | 2014-05-28 | 南昌航空大学 | Method for processing heavy metal waste pipe |
| CN113955838A (en) * | 2021-09-23 | 2022-01-21 | 北京化工大学 | Method for co-processing electroplating waste residue and chromium-containing heavy metal ion waste liquid |
| CN113955838B (en) * | 2021-09-23 | 2023-05-26 | 北京化工大学 | Co-treatment method for electroplating waste residue and chromium-containing heavy metal ion waste liquid |
| CN115465968A (en) * | 2022-09-16 | 2022-12-13 | 嘉兴学院 | Method for separating and recovering chromium in chrome tanning waste liquid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101870461B (en) | Method for treating waste liquid containing magnesium | |
| CN108372185B (en) | Titanium chloride slag resource utilization method and device | |
| CN101491771A (en) | Fenton and Fenton-like reaction catalyst regeneration and reclamation method | |
| CN108584901B (en) | Method for recovering ceramic-grade iron phosphate from polymetallic hazardous wastes | |
| CN103339271A (en) | Valuable metal leaching method, and valuable metal collection method employing the leaching method | |
| CN103395761B (en) | Method for preparing phosphate and iron oxide red by utilizing phosphated residue | |
| CN102031374A (en) | Method for separating and recovering nickel and lithium | |
| CN102276099A (en) | Comprehensive treatment method of waste water from laterite-nickel ore wet smelting | |
| CN104609683B (en) | A kind of renovation process of chrome tanning Heavy Metals in Sludge chromium | |
| CN103288231B (en) | Industrial treatment process for CODCr waste liquid | |
| CN101092272A (en) | Method for treating wastewater generated in vanadium oxide production | |
| CN101423875A (en) | Process technology for recycling and reuse waste chrome liquor in retanning | |
| WO2017080164A1 (en) | Electroplating waste water processing process | |
| CN105060599A (en) | Stainless steel pickling waste water resource recycling method | |
| CN104445720A (en) | Pickling waste liquid treatment process of steel industry | |
| CN111500864A (en) | Method for recycling electroplating sludge based on chromium recovery | |
| CN108328808A (en) | A kind of titanium chloride slag filtrate film integrated processing method and device | |
| CN102910760A (en) | Treatment process of contaminated acid containing heavy metals | |
| CN101407365A (en) | Method for processing chroming waste liquor | |
| CN110844890A (en) | Resource recycling method of waste sulfuric acid of storage battery | |
| JP6593084B2 (en) | Method of recovering phosphate from steel slag | |
| CN202657995U (en) | Recycling system for acid-containing wastewater | |
| CN109516443A (en) | A kind of processing method of the Waste Sulfuric Acid containing aluminium | |
| CN102515174A (en) | Process for recycling treatment of chromium slag and waste water | |
| CN106745109A (en) | Method for treating waste liquid generated by extracting cobalt and nickel by acid leaching process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Cheng Baojian Document name: Notice of correction Addressee: Cheng Baojian Document name: Deemed not to require loss of novelty grace notice |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Cheng Baojian Document name: Notification of Passing Preliminary Examination of the Application for Invention |
|
| 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 |
Open date: 20090415 |