CN1504415A - Method for producing composite polyaluminium ferric sulfate water-purifying agent - Google Patents
Method for producing composite polyaluminium ferric sulfate water-purifying agent Download PDFInfo
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- CN1504415A CN1504415A CNA021521255A CN02152125A CN1504415A CN 1504415 A CN1504415 A CN 1504415A CN A021521255 A CNA021521255 A CN A021521255A CN 02152125 A CN02152125 A CN 02152125A CN 1504415 A CN1504415 A CN 1504415A
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- ferric sulfate
- aluminium
- poly
- purifying agent
- making
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a process for preparing poly-aluminum ferric sulfate composite water purification agent, which combines the characteristic of ferrum and aluminum polymeric compound to improve water purification efficiency. The water purification agent making process includes the steps of dissolution, oxidization and polymerization, it realizes simple process, low reaction temperature and wide scope of product application.
Description
Technical field
The invention belongs to the use in waste water treatment water purification agent, mainly is the method for making of compound type purifying agent.
Technical background
Polyaluminium sulfate and bodied ferric sulfate are a kind of coagulating agent (scavenging agents), but coagulation performance is not ideal, obtaining the comprehensively characteristics of the two of poly-aluminium ferric sulfate (PAFS) after Tai-Ace S 150 and the ferric sulfate polymerization, improve the colourity of coagulation effect and minimizing water greatly.Poly-aluminium ferric sulfate (PAFS) is compound ferric subsulfate, Tai-Ace S 150 polymkeric substance, and general formula is [Fe
2(OH) n (So4)
3-0.5n] m[Al
2(OH) x (So4)
3-0.5y] k (n, x＜2, m, k＞10), there be the multiple monokaryon and the multinuclear coordination thing of iron and aluminium in its aqueous solution, the continuous hydrolysis of these compounds, polymerization, the polymer complex that the formation molecular weight is huge, these materials make water-borne glue body particulate and suspended substance form thick floc sedimentation by absorption, bridge formation, crosslinked action and sedimentation rapidly.Be mainly used in the purifying treatment of the sewage and the trade effluent in city, particularly remove gluey pollutent in the waste water.Poly-aluminium ferric sulfate is a kind of inorganic polymer flocculant that grew up in recent years.Present domestic report production method is less, and all has some deficiency.The purpose of this invention is to provide the method for making poly-aluminium ferric sulfate composite water purifying agent, this method has that temperature of reaction is low, speed of response fast, the technology characteristic of simple.
Summary of the invention
The method for making of poly-aluminium sulfuric acid swage water purification agent provided by the present invention, mainly with aluminium salt and molysite as raw material, form through oxypolymerization, technological process comprises as follows:
According to Al/Fe mol ratio 3: 7 Al
2(So4)
318H2O and FeSO
4The 7H2O water dissolves, and is right
Back normal temperature adds oxygenant and stablizer down and carries out oxidation, obtains the PAFS liquid product in 4 hours 70 ℃ of following polymerizations after the oxidation, and drying can obtain the PAFS solid phase prod again.
Influence the factor of product performance:
1, pH value: it is an important factor that pH value directly influences coagulation performance, also influences hydrolysis and extent of polymerization and product stability, and pH value increases, and hydrolysis degree increases, but the stability reduction generates Al (OH) 3 and Fe (OH) 3 precipitations easily.Therefore best PH should be controlled between the 1.5-2.0.
2, stablizer: produce because the preparation PAFS shelf-time has precipitation when long, influence quality product, thus need the interpolation stablizer, stablizer commonly used has Na3PO4, Tartaric acid, oxalic acid etc.Find that through experiment WDJ (phosphoric acid) effect is better, the content of WDJ has a significant impact stability and flocculating effect.
3, Al/Fe mol ratio: flocculating effect and stability influence to PAFS are bigger, and directly influence the pH value of PAFS, the polymerization degree etc.When the raw waste water turbidity is 50.1mg/L, when CODcr was 250mg/L, different al/Fe saw the following form to the influence of sewage disposal
| Al∶Fe | ????1∶9 | ????3∶7 | ????5∶5 | ????7∶3 | |
| Residual turbidity (mg/L) | ????8.7 | ????4.6 | ????4.9 | ????8.8 | |
| CODcr | ????180 | ????108 | ????110 | ????140.5 |
Water purification agent add-on when disposing of sewage is that 30-60mg/L is best.
Embodiment:
With 104 gram Al
2(So4)
318H2O and FeSO
47H2O is dissolved in the 200ml water, adds the dense H of 8ml
2SO4 and 2mlH
3PO
4, the H of slow adding 30% under stirring and normal temperature condition
2O
2100ml and phosphoric acid (WDK) stablizer carries out oxidizing reaction, H
2O
2Adding speed be 4 hours, add 100ml and exceed, after reaction finishes,, promptly obtain liquid PAFS russet 70 ℃ of following slakings 4 hours, drying can get the PAFS solid phase prod again.
Claims (3)
1, a kind of method for making of poly-aluminium ferric sulfate compound type purifying agent, comprise dissolving, oxidation and polymerization process, it is characterized in that with aluminium salt and molysite being that raw material dissolves, normal temperature adds oxygenant and stablizer down and carries out oxidation, obtained poly-aluminium ferric sulfate liquid product in 4 hours 70 ℃ of following polymerizations then, drying can obtain poly-aluminium ferric sulfate solid phase prod again.
2, according to the method for making of the poly-aluminium ferric sulfate compound type purifying agent described in the claim 1, it is characterized in that described oxygenant is 30% hydrogen peroxide, it is phosphoric acid that oxidising process adds stablizer.
3, according to the method for making of the poly-aluminium ferric sulfate compound type purifying agent described in the claim 1, it is characterized in that described aluminium salt and molysite are Tai-Ace S 150 and ferric sulfate, consumption is 3: 7 inputs according to the Al/Fe mol ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021521255A CN1504415A (en) | 2002-12-04 | 2002-12-04 | Method for producing composite polyaluminium ferric sulfate water-purifying agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021521255A CN1504415A (en) | 2002-12-04 | 2002-12-04 | Method for producing composite polyaluminium ferric sulfate water-purifying agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1504415A true CN1504415A (en) | 2004-06-16 |
Family
ID=34234632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021521255A Pending CN1504415A (en) | 2002-12-04 | 2002-12-04 | Method for producing composite polyaluminium ferric sulfate water-purifying agent |
Country Status (1)
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|---|---|
| CN (1) | CN1504415A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805051A (en) * | 2010-04-06 | 2010-08-18 | 重庆大学 | Compound phosphoric polyferric sulfate flocculant and production method thereof |
| CN102887575A (en) * | 2011-07-20 | 2013-01-23 | 宝山钢铁股份有限公司 | Technology for recycling recovery of waste sulfuric acid |
| CN104724804A (en) * | 2015-03-26 | 2015-06-24 | 徐颖惠 | Method for preparing polyaluminium ferric sulfate through acid self coupling balance method |
| CN104803460A (en) * | 2015-03-26 | 2015-07-29 | 徐颖惠 | Method for preparing PAFS (polymeric aluminum ferric sulfate) by adopting acid self-coupling balance and near-dry method |
-
2002
- 2002-12-04 CN CNA021521255A patent/CN1504415A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805051A (en) * | 2010-04-06 | 2010-08-18 | 重庆大学 | Compound phosphoric polyferric sulfate flocculant and production method thereof |
| CN101805051B (en) * | 2010-04-06 | 2012-07-25 | 重庆大学 | Compound phosphoric polyferric sulfate flocculant and production method thereof |
| CN102887575A (en) * | 2011-07-20 | 2013-01-23 | 宝山钢铁股份有限公司 | Technology for recycling recovery of waste sulfuric acid |
| CN102887575B (en) * | 2011-07-20 | 2015-04-01 | 宝山钢铁股份有限公司 | Technology for recycling recovery of waste sulfuric acid |
| CN104724804A (en) * | 2015-03-26 | 2015-06-24 | 徐颖惠 | Method for preparing polyaluminium ferric sulfate through acid self coupling balance method |
| CN104803460A (en) * | 2015-03-26 | 2015-07-29 | 徐颖惠 | Method for preparing PAFS (polymeric aluminum ferric sulfate) by adopting acid self-coupling balance and near-dry method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |