CN106115797A - It is a kind of that catalytic wet persulfate oxidation is desuifurized prepares polymeric ferric sulfate flocculant method - Google Patents
It is a kind of that catalytic wet persulfate oxidation is desuifurized prepares polymeric ferric sulfate flocculant method Download PDFInfo
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- CN106115797A CN106115797A CN201610473606.6A CN201610473606A CN106115797A CN 106115797 A CN106115797 A CN 106115797A CN 201610473606 A CN201610473606 A CN 201610473606A CN 106115797 A CN106115797 A CN 106115797A
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- desuifurized
- ferric sulfate
- persulfate
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- flocculant
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/14—Sulfates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- Hydrology & Water Resources (AREA)
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Abstract
The invention provides a kind of desuifurized method preparing polymeric ferric sulfate flocculant of catalytic wet persulfate oxidation, belong to resource reclaim reutilization technology field.Ferrous ion in desuifurized and heating helper activity persulfate, produce potentiometric titrations and ferric ion, and in potentiometric titrations oxidation sweetening waste residue, sulfide is sulfate radical, obtains iron sulfate mother solution.Its hydrolytic polymerization synthesizing polymeric ferric sulfate flocculant is made by regulation iron sulfate mother liquor acid basicity.The invention have the advantages that resources such as effectively utilizing desuifurized middle ferrum, sulfur, the potentiometric titrations utilizing persulfate activation to produce efficiently processes desuifurized middle sulfide, reduces environmental pollution and waste residue harm.Experimental technique is simple, and ferrum leaching rate is high, and gained polymeric ferric sulfate flocculant flocculating property is good, has wide application prospect.
Description
Technical field
The invention belongs to resource reclaim reutilization technology field, relate to a kind of catalytic wet persulfate oxidation desuifurized
The method preparing polymeric ferric sulfate flocculant.
Background technology
At present, the technique of hydrogen sulfide gas is removed present in natural gas, coal gas, oil because of it with ferrum oxide for adsorbent
Simple to operate, removal efficiency is high and is extensively favored.This technique is mainly in irreproducibility desulfurization typical Slurrisweet
Method, makees Fine Desulfurizer at Ambient Temperature, due to Fe with EF-2 type special type ferrum oxide3+There is Strong oxdiative performance, can be with S2-There is oxidoreduction
Reaction, generates FeS, Fe2S3Sulfides, and then removing hydrogen sulfide gas.What thus technique obtained is desuifurized containing abundant
Iron resource, but because it is mainly composed of iron sulfide easily spontaneous combustion in the case of room temperature, meet high heat, acidity and easily decompose generation sulfuration
The gas such as hydrogen, sulfur dioxide, is detrimental to health, and destroys central nervous system and respiratory system, deals with easy initiation potential improperly.
Currently, less for desuifurized processing mode, the method that is mainly humidified, acid wash, alkali wash, oxidant method, Chemical Inhibition
Method etc..Various processing modes be intended to stable or shift desuifurized in sulfide, but stable after waste residue need large area
Disposal field, relatively costly, the sulfide after transfer forms more stable compound such as Na2Although S toxicity is less than H2S but this
Planting alkaline waste to be difficult to process, the most desuifurized effectively utilizing is still the important topic that urgent need solves.
Bodied ferric sulfate is a kind of New Inorganic High Polymer Coagulant, and it has that hydrolysis rate is fast, floc density big,
The features such as pH is applied widely, little to equipment corrosion, production cost is low, can remove well the float in water, microorganism,
The impurity such as Organic substance, sulfide, heavy metal ion, are widely used in the process of industry water, municipal sewage and drinking water.Polymerization
The preparation of iron sulfate mainly with ferrous sulfate for raw material utilize oxidizing, hydrolyze, be polymerized to iron sulfate polymer, it has
Effect composition is mainly iron ion, sulfate ion, hydroxyl ion.Have numerous studies at present with industrial residue and spent acid such as scrap iron
Bits, iron and steel pickling waste liquid, titanium white production waste material, Melanteritum and ferrous salt solution, pyrite cinder etc. prepare polymerised sulphur for raw material
Acid ferrum.Obtaining mother solution many employings Leaching by strong acid curing ferrous solution from spent acid or industrial residue at present, in mother solution, iron ion is of a great variety,
Need oxidized dose of oxidation rear hydrolyzable polymerization synthesizing polymeric ferric sulfate.Complex process, energy resource consumption is bigger.
Persulfate, as novel advanced oxidation agent, produces strong under heat, light, the condition such as transition metal-catalyzed activate
The potentiometric titrations SO of oxidisability4-.Because it is simple and easy to get, the features such as workable, oxidisability is good, control in environmental pollution
Reason field is widely studied.
More than based on, set forth herein the desuifurized side preparing bodied ferric sulfate of a kind of catalytic wet persulfate oxidation
Method, i.e. utilize desuifurized in abundant iron resource activation sodium peroxydisulfate, produce potentiometric titrations for sulfur oxide compound and
Ferrum generates iron sulfate mother solution, and mother liquid coming depolymerizes generation polymeric ferric sulfate flocculant, it is achieved desuifurized recycling.
Summary of the invention
It is an object of the invention to provide the desuifurized side preparing bodied ferric sulfate of a kind of catalytic wet persulfate oxidation
Method.The method is convenient and easy, and reactant is simple, easy to operate, can effectively remove pollutant hydrogen sulfide and to obtain flocculating property good
Good polymeric ferric sulfate flocculant.
The reaction principle of the method for the invention is: the ferrous ion in desuifurized and heating helper activity persulfuric acid
Salt, produces potentiometric titrations and ferric ion, and in potentiometric titrations oxidation sweetening waste residue, sulfide is sulfate radical, obtains
Iron sulfate mother solution.Its hydrolytic polymerization synthesizing polymeric ferric sulfate flocculant is made by regulation iron sulfate mother liquor acid basicity.
Technical scheme:
A kind of catalytic wet persulfate oxidation is desuifurized prepares polymeric ferric sulfate flocculant method, and step is as follows: will
Persulfate and desuifurized 1.5:1 in mass ratio mixing, add deionized water and make persulfate dissolve, 20 DEG C～70 DEG C of temperature
Under the conditions of heating in water bath, and stir 1h-5h；It is desuifurized that reaction removes residue through vacuum filtration after terminating, it is thus achieved that yellowish-brown sulfur
Acid ferrum mother solution；Heating in water bath under the conditions of iron sulfate mother solution is placed in 55 DEG C-85 DEG C, stirring slowly regulation pH is 1.0-4.0, hydrolysis
Polymerization 2h-4h obtains the polymeric ferric sulfate flocculant of rufous thick liquid.
Described desuifurized be stink damp present in a kind of iron oxide adsorbent removing natural gas, coal gas, oil
The waste residue that body obtains.
Described pH regulator mainly uses common alkali solution such as: sodium hydroxide, potassium hydroxide, ammonia etc..
Beneficial effects of the present invention: 1) desuifurized activation sodium peroxydisulfate make sodium peroxydisulfate activation rate improve 5.5 times, more have
Being beneficial to the raising of sodium peroxydisulfate oxidisability, ferrum leaching rate reaches 93% simultaneously, and in waste residue, major part iron resource obtains Appropriate application.2)
Potentiometric titrations sulfur oxide compound is the raw material that bodied ferric sulfate is prepared in sulfate radical on the one hand acquisition, the most effectively removes
In waste residue, sulfide avoids desuifurized generation stink damp body pollution environment.3) polymeric ferric sulfate flocculant obtained by possesses good
Good flocculating effect, can quickly form huge alumen ustum when adding 0.05g/l products made thereby, soon in Kaolin turbidity water
Speed sedimentation, it goes turbid rate to reach 86%.4) operational approach is simple, and reaction condition is gentle, and ferrum leaching rate is high, and synthesizing polymeric ferric sulfate is wadded a quilt with cotton
Solidifying effective, have broad application prospects.
Accompanying drawing explanation
Fig. 1 is that desulfurization waste residue activates persulfate efficiency chart, and wherein, white is persulfate consumption rate, and black is ferrum
Leaching rate.
Fig. 2 is that sodium peroxydisulfate dosage affects figure to prepare iron sulfate mother solution, and wherein, triangle is sodium peroxydisulfate dosage
Affecting sodium peroxydisulfate consumption rate, ferrum dissolution rate is affected by circle for sodium peroxydisulfate dosage, square for sodium peroxydisulfate dosage pair
Hydrogen sulfide generation amount affects.
Fig. 3 is that reaction temperature affects figure to prepare iron sulfate mother solution, wherein, square disappears sodium peroxydisulfate for reaction temperature
Consumption rate affects, and ferrum dissolution rate is affected by circle for reaction temperature.
Fig. 4 is the response time to affect figure to prepare iron sulfate mother solution, and wherein, circle is that the response time is to sodium peroxydisulfate consumption
Rate affect, square for the response time on ferrum dissolution rate affect.
Fig. 5 is that reaction temperature affects figure to prepare bodied ferric sulfate, and wherein, triangle is that reaction temperature is to bodied ferric sulfate
PH affects, and square bodied ferric sulfate goes for reaction temperature turbid influential effect.
Fig. 6 is that pH affects figure to prepare bodied ferric sulfate.
Fig. 7 is the different dosage flocculant treatment effect figures to Kaolin turbidity water.
Detailed description of the invention
Below in conjunction with embodiment, outstanding feature and the marked improvement of the present invention are further elucidated with, are only that and this is described
Bright and be in no way limited to following instance.Use the present invention method to desuifurized carry out process prepare bodied ferric sulfate flocculation
Agent.
Embodiment 1 desuifurized activation persulfate efficiency
Reaction condition: in different reactor, persulfate and desuifurized 1.5:1 in mass ratio are mixed, wherein, over cure
Hydrochlorate mainly includes sodium peroxydisulfate, potassium peroxydisulfate, Ammonium persulfate. three kinds, adds deionized water stirring and makes it dissolve, by reactor
At 70 DEG C of heating in water bath 2h, waste residue is filtered constant volume filtrate and measures persulfate consumption and ferrum dissolution rate.
Result such as Fig. 1: result shows, has what figure understood persulfate to add the desuifurized middle ferrum of beneficially dissolution, wherein
Sodium peroxydisulfate effect is best, and dissolution rate reaches 87%.Meanwhile, persulfate is all had activation to make by the blank reaction desulfuration waste residue of contrast
With, wherein the highest to sodium peroxydisulfate activation efficiency, desuifurized make sodium peroxydisulfate activation rate improve 5.5 times.Therefore, reaction is main
Select sodium peroxydisulfate as reaction primary raw material.
The impact on preparing iron sulfate mother solution of the embodiment 2 sodium peroxydisulfate dosage
Reaction condition: in the reactor by sodium peroxydisulfate and desuifurized by 0.2:1,0.3:1,0.5:1,0.7:1,1:1,
1.5:1 proportionate relationship adds, and adds deionized water stirring and accelerates to dissolve, 70 DEG C of heating in water bath 5h, vacuum filtration constant volume filtrate.Survey
Fixed its sodium peroxydisulfate, ferrum, hydrogen sulfide content.
Result such as Fig. 2: result shows, has figure to understand sodium peroxydisulfate and adds ratio sodium peroxydisulfate excess during more than 1 with waste residue, have
A small amount of residue.The leaching rate of ferrum is continuously increased with sodium peroxydisulfate dosage, and when sodium peroxydisulfate and waste residue ratio are 1.5, ferrum soaks
Go out rate and reach maximum 93%.The generation amount of hydrogen sulfide is less is respectively less than 0.15mg/g, when sodium peroxydisulfate and waste residue add than for
When 1.5, hydrogen sulfide generation amount, close to zero, has minor impact to environment.
The impact on preparing iron sulfate mother solution of embodiment 3 reaction temperature
Reaction condition: set 20 DEG C, 40 DEG C, 60 DEG C, 70 DEG C of four temperature conditionss, add equivalent mistake in 1:1 ratio respectively
Sodium sulfate and waste residue, add deionized water stirring and accelerate to dissolve, at assigned temperature heating in water bath 5h, and vacuum filtration, filtrate constant volume,
Analyze component.
Experimental result such as Fig. 3: result shows, along with the rising of temperature, the consumption of sodium peroxydisulfate and the leaching rate of ferrum all in
Increasing trend, when temperature reaches 70 DEG C, sodium peroxydisulfate consumption rate reaches 94%, and the leaching rate of ferrum reaches 64%
The impact on preparing iron sulfate mother solution of embodiment 4 response time
Reaction condition: set 1h, in five response time of 2h, 3h, 4h, 5h, add over cure in the ratio that adds of 1.5:1 respectively
Acid sodium and waste residue, add ionized water stirring and accelerate to dissolve, and 70 DEG C of heating in water bath are specified the time, vacuum filtration, and filtrate constant volume is analyzed
Its component.
Result such as Fig. 4: result shows, the consumption rate of sodium peroxydisulfate has downward trend after now increasing with the response time, ferrum
Leaching rate is gradually increased along with the prolongation in response time.
The impact on preparing bodied ferric sulfate of embodiment 5 reaction temperature
Reaction condition: set 35 DEG C, 55 DEG C, 65 DEG C, 75 DEG C, 85 DEG C of five temperature conditionss respectively, take iron sulfate mother solution extremely
In reactor, it is intended that temperature water bath heats, slowly regulation pH to 2.5, and stir 2h, cooling measures its pH and removes turbidity energy
Power.
Result such as Fig. 5: result shows, along with the increase of reaction temperature, obtained bodied ferric sulfate goes turbid ability now to increase
Reducing after adding, when temperature reaches 55 DEG C, go turbid effect preferably to reach 83%, the increase along with temperature of Ph shows as first increasing subtracting afterwards
Little trend.
Embodiment 6 pH impact on preparing bodied ferric sulfate
Reaction condition: take 50ml iron sulfate mother solution, 55 DEG C of heating in water bath, regulate solution ph respectively, obtains a series of poly-
Close ferrum sulfuricum oxydatum solutum, finished product is put in Kaolin turbidity water, measure it and go turbid ability.
Result such as Fig. 6: result shows, along with pH value must increase, obtained bodied ferric sulfate goes turbid ability to significantly improve, when
During pH=3.20, corresponding to it, liquid polymerization iron sulfate finished product goes turbid efficiency to reach 90%.
The different dosage flocculant treatment effect to Kaolin turbidity water of embodiment 7
Reaction condition: above-mentioned obtained liquid polymerization ferrum sulfuricum oxydatum solutum is dried under natural environment, prepares with Kaolin
Turbidity water, stirs instrument by coagulation, adds the ferric polysulfate solid product 10mg/l of pH=2.0 hydrolytic polymerization respectively,
50mg/l, 100mg/l, 200mg/l, 300mg/l, 400mg/l, 500mg/l, measure its turbidity removal rate.
Result such as Fig. 7: result shows, makes the bodied ferric sulfate treatment effect to Kaolin turbidity water by oneself, along with adding
Increasing of amount occurs first increasing the trend reduced afterwards, and optimum dosage is 50mg/l, and its turbidity removal rate is 86%.
Claims (3)
1. a catalytic wet persulfate oxidation is desuifurized prepares polymeric ferric sulfate flocculant method, it is characterised in that step
Rapid as follows: persulfate and desuifurized 1.5:1 in mass ratio to be mixed, adds deionized water and make persulfate dissolve, at 20 DEG C
～heating in water bath under 70 DEG C of temperature conditionss, and stir 1h-5h；It is desuifurized that reaction removes residue through vacuum filtration after terminating, and obtains
Obtain yellowish-brown iron sulfate mother solution；Heating in water bath under the conditions of iron sulfate mother solution is placed in 55 DEG C-85 DEG C, stirring slowly regulation pH is
1.0-4.0, hydrolytic polymerization 2h-4h obtain the polymeric ferric sulfate flocculant of rufous thick liquid.
Catalytic wet persulfate oxidation the most according to claim 1 is desuifurized prepares polymeric ferric sulfate flocculant side
Method, it is characterised in that described desuifurized be sulfur present in a kind of iron oxide adsorbent removing natural gas, coal gas, oil
Change the waste residue that hydrogen obtains.
Catalytic wet persulfate oxidation the most according to claim 1 and 2 is desuifurized prepares polymeric ferric sulfate flocculant
Method, it is characterised in that regulation pH uses sodium hydroxide, potassium hydroxide or ammonia.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107216011A (en) * | 2017-07-11 | 2017-09-29 | 湖南大学 | Catalytic wet oxidation handles the method and system of oil-containing dross |
| CN113003818A (en) * | 2021-03-26 | 2021-06-22 | 沈阳大学 | Method for treating organic wastewater based on advanced oxidation system of magnesium-method flue gas desulfurization slag |
| CN115093005A (en) * | 2022-06-27 | 2022-09-23 | 中节能工程技术研究院有限公司 | Waste alkali liquor oxidation desulfurization method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328978A (en) * | 2011-06-24 | 2012-01-25 | 苏州科技学院 | Method for preparing compound flocculant by utilizing flue gas desulfurization waste slag |
| CN102701487A (en) * | 2012-06-25 | 2012-10-03 | 杨德敏 | Method for treating sulfur-containing wastewater of oil and gas field |
| CN103241779A (en) * | 2013-05-31 | 2013-08-14 | 西安科技大学 | Preparation method of polyferric sulfate (PFS) |
-
2016
- 2016-06-27 CN CN201610473606.6A patent/CN106115797A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328978A (en) * | 2011-06-24 | 2012-01-25 | 苏州科技学院 | Method for preparing compound flocculant by utilizing flue gas desulfurization waste slag |
| CN102701487A (en) * | 2012-06-25 | 2012-10-03 | 杨德敏 | Method for treating sulfur-containing wastewater of oil and gas field |
| CN103241779A (en) * | 2013-05-31 | 2013-08-14 | 西安科技大学 | Preparation method of polyferric sulfate (PFS) |
Non-Patent Citations (4)
| Title |
|---|
| 刘珍贤: "生产聚合硫酸铁的原料及方法", 《贵州化工》 * |
| 张忠磊等: "FeS/K2S2O8去除水体系中的2，4-D", 《环境工程学报》 * |
| 陈宪方等: "黄铁矿活化过硫酸钠降解对氯苯胺的研究", 《广东化工》 * |
| 黄仁和等: "HNO3氧化煤系硫铁矿生产聚铁的方法及装置", 《煤炭转化》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107216011A (en) * | 2017-07-11 | 2017-09-29 | 湖南大学 | Catalytic wet oxidation handles the method and system of oil-containing dross |
| CN113003818A (en) * | 2021-03-26 | 2021-06-22 | 沈阳大学 | Method for treating organic wastewater based on advanced oxidation system of magnesium-method flue gas desulfurization slag |
| CN113003818B (en) * | 2021-03-26 | 2023-04-21 | 沈阳大学 | Method for treating organic wastewater by using advanced oxidation system based on magnesium method flue gas desulfurization slag |
| CN115093005A (en) * | 2022-06-27 | 2022-09-23 | 中节能工程技术研究院有限公司 | Waste alkali liquor oxidation desulfurization method |
| CN115093005B (en) * | 2022-06-27 | 2023-11-10 | 中节能工程技术研究院有限公司 | Waste alkali liquid oxidation desulfurization method |
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