CN108083400A - A kind of preparation method of phosphorous polyiron sulfate and its application for handling coking wastewater - Google Patents
A kind of preparation method of phosphorous polyiron sulfate and its application for handling coking wastewater Download PDFInfo
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- CN108083400A CN108083400A CN201711397120.XA CN201711397120A CN108083400A CN 108083400 A CN108083400 A CN 108083400A CN 201711397120 A CN201711397120 A CN 201711397120A CN 108083400 A CN108083400 A CN 108083400A
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- sulfate
- flocculant
- phosphorous
- phosphoric
- ferrous sulfate
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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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Abstract
A kind of production technology the invention discloses inorganic phosphor-contained composite high-molecular polyiron sulfate coagulant and its application in the high concentrated organic wastewaters such as coking wastewater advanced treating (dephosphorization and go residual COD)；For phosphorous polyiron sulfate to produce the byproduct ferrous sulfate of titanium dioxide, liquid oxygen etc. as raw material, finished product iron-holder (in terms of Fe) is 11.0% 15.5%, has the characteristics that comprehensive utilization of resources is high, of low cost；Using organic phosphoric acid as " crosslinking agent ", the degree of polymerization of hydrolysis iron ion is expanded, so as to preferably play bridging and cohesion ability of the iron ion in water body, performance promotes more than 10% compared with typical polymerization ferric sulfate.Simple production process of the present invention, it is easy to operate, it can be carried out under low-temperature atmosphere-pressure, suitable for large-scale production, three wastes generation, is a kind of environmentally protective technique in process of production.
Description
Technical field
The invention belongs to sewage treatment field, more particularly to a kind of system of novel phosphorus-containing composite coagulant polyiron sulfate
Preparation Method, more particularly to a kind of application of phosphoric polyferric sulfate flocculant processing coking wastewater.
Background technology
Macromolecule ferric flocculant is the inorganic high score for most having in the current chemistry in water treatment precipitation method development and application prospect
Sub- coagulant, for example, bodied ferric sulfate (PFS), poly-ferric chloride (PFC), ferric sulfate of polymerized silica (PFSS), polyphosphate iron sulfate
(PPFS), polyphosphate iron sulfate and compounding novel coagulant etc..Recent years, the use of bodied ferric sulfate is increasingly extensive, research
Produce bodied ferric sulfate new method and new process continue to bring out, simplify technique, reduce cost, improvement effect, enhancing product it is competing
Power is striven, is the general trend of bodied ferric sulfate technology of preparing development.
Bodied ferric sulfate (PFS) is also referred to as ferric subsulfate or hydroxide iron sulfate, and molecular formula is generally represented by [Fe2
(OH)n(SO4)3-n/2]m.It is an intermediate product of the ferric sulfate in hydrolysis-flocculation process.Liquid polymeric ferric sulfate sheet
Body contains substantial amounts of polymerizing cationically, such as [Fe3 (OH) 4] 5+, [Fe6 (OH) 12] 6+, [Fe4O (OH) 4] 6+.It is water-soluble
There is the complex cations such as [Fe (H2O) 6] 3+, [Fe2 (H2O) 3] 3+, [Fe (H2O) 2] 3+ in liquid.They are with hydroxyl (- OH)
Bridge formation forms multinuclear complex ion, so as to form huge inorganic macromolecule compound, can consumingly adsorb colloidal particles, pass through
Adherency is built bridge, crosslinked action, promotes particle coagulation.
The widely used dioxygen oxidation of China's industrial production of polymeric ferric sulfate and the method for nitrogen oxides catalysis, synthesizer
Following (the Chinese granted patent CN101805051B of reason：A kind of compound phosphoric polyferric sulfate flocculant and its production method；China authorizes
Patent CN104709992B：A kind of phosphoric polyferric sulfate flocculant and its preparation method and application；Li Fengting China coagulant polymeric
State-of-the-art [J] Treatment of Industrial Water of ferric sulfate, 2002,01:5-8.；Li Fengting, Liu celebrate inorganic polymer coagulations then
Synthetic method [J] Treatment of Industrial Water of agent poly-ferric chloride, 1999,06:26-27.)：
H2SO4+2MNO2=2HNO2+M2SO4 (1)
H2SO4+2HNO2+2FeSO4=Fe2(SO4)3+2NO+2H2O (2)
2NO+O2=2NO2 (3)
H2SO4+2NO2+2FeSO4=Fe2(SO4)3+2NO↑+2H2O (4)
Net reaction is：
4FeSO4·7H2O+2H2SO4+O2=2Fe2(SO4)3+30H2O (5)
(1) hydrolysis (fast response)：
Fe2(SO4)3+H2O=Fe2(OH)n(SO4)3-n/2+(n/2}H25O4 (6)
(2) polymerisation (fast response)：
n[Fe2(OH)n(SO4)3-n/2]=[Fe2(OH)n(SO4)3-n/2]m
Wherein：N≤2, m >=f (n)
In formula：M is alkali metal ion either alkaline-earth metal ions,
The ratio of appropriate adjustment FeSO4 and H2SO4, it is possible to prepare 3 solution of stable Fe2 (SO4) or with anion
Bodied ferric sulfate hydroxy.In bodied ferric sulfate, iron ion is in partial hydrolysis state, and ligand is sulfate radical and hydrogen-oxygen
Root, this chelation structure so that ferric sulfate is easier, in the rapid further hydrolysis close in neutral water body, cohesion to occur.
Polyphosphate iron sulfate (PPFS) is a kind of new structure coagulant synthesized on the basis of bodied ferric sulfate (PFS),
It introduces phosphate anion on the basis of bodied ferric sulfate, by the poly- effect of the increasing of phosphate radical, improves the basicity of product,
Bridging effect increases.Phosphoric acid has extraordinary complex performance with iron ion, but its molecular weight is relatively small, bridge linking effect
Still there is further widened space.
Have researcher and tentative work has been done using sodium pyrophosphate, utilize ferrous sulfate heptahydrate, sodium chlorate and coke
Sodium phosphate is raw material, the method that Polyferric Phosphate Sulfate flocculant is prepared by the synthesis technology of designed, designed, is produced for iron white powder
By-product ferrous sulfate heptahydrate, providing new application approach, (Liu Zhirong, Liu Dejun, Gu Zhongmao wait Polyferric Phosphate Sulfates
Preparation [J] chemical industry environmental protections of powder, 2004,24 (5)：373-375.).
Tripolyphosphate, various organic phosphoric acids etc. widely use in industrial circulating cooling water, exactly rely on they for iron,
Aluminium, calcium, the good complexing of magnesium plasma, while there is inducing action, regular crystal habit can not be formed.This kind of chemical combination
Object in addition to traditional tripolyphosphate (sodium), also has aminotrimethylenephosphonic acid (ATMP, Amino Trimethylene
Phosphonic Acid), 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP-1-Hydroxyethylidene-1,1-
Diphosphonicacid) etc., the unimolecule of this kind of substance at least contains there are three phosphate group, so as to the hydrolysis with iron
Substance forms star-like or spatial networks structures, so as to play " crosslinking " effect, to increase the molecular weight of complex compound or molten
Liquid apparent viscosity.Since this kind of substance has polyphosphoric acid group, no partially hydrolysed iron ion can be complexed, thus
Its than small molecule phosphoric acid have stronger complex performance, can be obviously improved bodied ferric sulfate extent of polymerization (Li Fengting, it is old
Auxiliary monarch, Du Xirong, old winter occasion are flourish, discussion [J] water supply and drainages of coagulant polymeric ferric sulfate reaction mechanism, and 1994,08:39-
40)。
The content of the invention
The purpose of the present invention will solve above-mentioned technical problem, provide in a kind of adjusting bodied ferric sulfate using organic phosphoric acid
The preparation method of Polymerization of Ferric Ions degree, and use it for the advanced treating of the typical high concentrated organic wastewater such as coking wastewater.
The object of the present invention is achieved like this：A kind of preparation method of phosphorous polyiron sulfate, it is characterised in that：Including with
Lower operating procedure：
A ferrous sulfate mixed liquor), is configured, ferrous sulfate heptahydrate or ferrous sulfate monohydrate are added to the water in proportion, and stir
It mixes uniformly；
B the pH value of ferrous sulfate mixed liquor), is adjusted, in the ferrous sulfate mixed liquor of preparation, is slowly added in proportion under stiring
Enter organic phosphoric acid, sulfuric acid and nitric acid, adjust its pH value less than 1.0；
C oxidation reaction), is carried out, is depressed in room temperature, liquid oxygen adds in reactor after gasification, oxidation reaction is carried out, during reaction
Between be 40-50 minutes；
D), after reaction, the bodied ferric sulfate that iron-holder is phosphorous 0.5~1% is produced.
The ferrous sulfate uses the substandard goods ferrous sulfate of production titanium dioxide as raw material.
The organic phosphoric acid is 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP).
A kind of phosphoric polyferric sulfate flocculant, it is characterised in that：It is prepared using method described in claim 1；The poly- phosphorus sulphur
In sour ferric flocculant product the full iron Fe3+ mass contents of active ingredient be 11%~15%, basicity for 13~25%, pH1.4~
1.6。
A kind of application of phosphoric polyferric sulfate flocculant processing coking wastewater, it is characterised in that：It will be poly- described in claim 4
Phosphorus ferric sulfate flocculant is used for the removal of phosphorus and residual COD during coking wastewater deep treatment, including following operating procedure：
A), phosphoric polyferric sulfate flocculant is added to biochemical processing process section secondary clarifier effluent, reacts 1~2min；Dosage
For 100~500ppm；
B polyacrylamide), is added into solution, after quick stirring 30s, 30s, sedimentation time 10min is mixed slowly, gathers
The dosage of acrylamide is 1~2ppm；
C), supernatant collection is discharged after precipitation；After sludge is collected, separation of solid and liquid is realized through mechanical dehydration, mud cake enters coke
Stove is calcined, and entire technique is generated without waste water,waste gas and industrial residue.
Step A) in phosphoric polyferric sulfate flocculant actual dosage need to according to secondary clarifier effluent matter and processing after, through beaker
It is determined after testing Integrated comparative.
Production technology of the present invention is easy, easy to operate, can be carried out under low-temperature atmosphere-pressure, and three wastes are produced in process of production
It is raw, it is a kind of environmentally protective production technology, phosphorous polyiron sulfate is to produce the byproduct ferrous sulfate of titanium dioxide, liquid oxygen etc.
For raw material, have the characteristics that comprehensive utilization of resources is high, of low cost, promoting and applying has good economic and social benefit.
Description of the drawings
Fig. 1 is influence table of three dephosphorization of the embodiment of the present invention experiment dosage to total phosphorus (TP) removal effect.
Fig. 2 is the COD removal tables of the embodiment of the present invention three.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings, but not as limitation of the present invention：
A kind of preparation method of phosphorous polyiron sulfate, it is characterised in that：Including following operating procedure：
A ferrous sulfate mixed liquor), is configured, ferrous sulfate heptahydrate or ferrous sulfate monohydrate are added to the water in proportion, and stir
It mixes uniformly；
B the pH value of ferrous sulfate mixed liquor), is adjusted, in the ferrous sulfate mixed liquor of preparation, is slowly added in proportion under stiring
Enter organic phosphoric acid, sulfuric acid and nitric acid, adjust its pH value less than 1.0；
C oxidation reaction), is carried out, is depressed in room temperature, liquid oxygen adds in reactor after gasification, oxidation reaction is carried out, during reaction
Between be 40-50 minutes；
D), after reaction, the bodied ferric sulfate that iron-holder is phosphorous 0.5~1% is produced；
The ferrous sulfate uses the substandard goods ferrous sulfate of production titanium dioxide as raw material；
The organic phosphoric acid is 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP).
A kind of phosphoric polyferric sulfate flocculant, it is characterised in that：It is prepared using method described in claim 1；The poly- phosphorus sulphur
In sour ferric flocculant product the full iron Fe3+ mass contents of active ingredient be 11%~15%, basicity for 13~25%, pH1.4~
1.6。
A kind of application of phosphoric polyferric sulfate flocculant processing coking wastewater, it is characterised in that：It will be poly- described in claim 4
Phosphorus ferric sulfate flocculant is used for the removal of phosphorus and residual COD during coking wastewater deep treatment, including following operating procedure：
A), phosphoric polyferric sulfate flocculant is added to biochemical processing process section secondary clarifier effluent, reacts 1~2min；Dosage
For 100~500ppm；
B polyacrylamide), is added into solution, after quick stirring 30s, 30s, sedimentation time 10min is mixed slowly, gathers
The dosage of acrylamide is 1~2ppm；
C), supernatant collection is discharged after precipitation；After sludge is collected, separation of solid and liquid is realized through mechanical dehydration, mud cake enters coke
Stove is calcined, and entire technique is generated without waste water,waste gas and industrial residue；
Step A) in phosphoric polyferric sulfate flocculant actual dosage need to according to secondary clarifier effluent matter and processing after, through beaker experiments
It is determined after Integrated comparative.
When it is implemented, the present invention using organic phosphoric acid as " crosslinking agent ", has expanded the degree of polymerization for hydrolyzing iron ion, from apparent
On improve the viscosity of bodied ferric sulfate, so as to preferably play iron ion bridging and cohesion ability in water body；
The present invention is after adopting the above technical scheme, the iron-holder (in terms of Fe) of phosphorous polyiron sulfate flocculant is 11.0%-
15.5%.It can be used for the processing of various sewage, performance promotes more than 10% compared with typical polymerization ferric sulfate.
Embodiment one, preparation method one：1) 650.0g ferrous sulfate heptahydrates are weighed to be placed in 2L glass reaction kettles, is added in
5.0ml mass concentrations be 92.5% industrial sulphuric acid, 1.0ml mass concentrations be 65.0% industrial HEDP, 3.0ml mass concentrations
For 60.0% industrial nitric acid, 2min is stirred under the mixing speed of 300-500r/min so that reactant is formed at normal temperatures
Even liquid；
2) by after liquid oxygen gasification, it is added in reaction kettle, is sufficiently stirred, gas phase and liquid phase are brown mixture, in reaction process,
Mixture temperature meeting nature rises to 70-80 DEG C, and liquid becomes transparent, and color also gradually becomes transparent rufous from brown.
After reacting 40min, the ferrous ion in mixed liquor is measured, then reaction was completed for complete oxidation.
3) after the completion of above-mentioned steps, take out, you can obtain the phosphorous polyiron sulfate 1 of product high viscosity；
The phosphorous polyiron sulfate of high viscosity obtained 1 is detected.After testing, product appearance obtained is sticky reddish brown
Liquid：Density:1.53g/ml；Full weight of iron concentration：14.3%；Basicity 15.3%.
Embodiment two, preparation method two：1) it is anti-to be placed in the 2L glass equipped with insulating layer for weighing 660.0g ferrous sulfate heptahydrates
It answers in kettle, adds in the industrial sulphuric acid that 5.5ml mass concentrations are 92.5%, 1.0ml mass concentrations are 50.0% industrial ATMP,
3.0ml mass concentrations are that mass concentration is 60.0% industrial nitric acid, are stirred at normal temperatures under the mixing speed of 300-500r/min
Mix 2min so that reactant forms uniform liquid；
2) after liquid oxygen gasification, will be added in the reaction kettle equipped with insulating layer；It is sufficiently stirred, gas phase and liquid phase mix for brown
Object, in reaction process, mixture temperature can nature rise to 70-80 DEG C, liquid becomes transparent, and color also gradually becomes from brown
Transparent brownish red；After reacting 45min, the ferrous ion in mixed liquor is measured, then reaction was completed for complete oxidation；
3) after the completion of above-mentioned steps, take out, you can obtain the phosphorous polyiron sulfate 2 of product high viscosity.
The phosphorous polyiron sulfate of high viscosity obtained 2 is detected.After testing, product appearance obtained is sticky dark red
Brown liquid；Density：1.51g/ml；Full weight of iron concentration：14.0%；Basicity 13.3%.
The application of embodiment three, flocculant process coking wastewater, coking wastewater take off charcoal phosphor-removing effect：
Experiment water sample is derived from Shanghai coke-oven plant sewage disposal secondary clarifier effluent, 10 DEG C of temperature ﹤；The water quality of experimental water：PH is
6.91, turbidity 17.17NTU, colourity are 20 times (in terms of extension rates), and total phosphorus TP concentration is 3.00mg/L；
(300r/min) adds in a certain amount of coagulated agent into 1L water samples first under fast stirring, and 1min is stirred in continuation soon；So
Afterwards under the conditions of (100r/min) is stirred slowly, PAM is put into, persistently stirs 1min；Finally staticly settle 10min.Supernatant is taken to survey TP,
Wherein the measure of phosphate standard curve and TP uses GB11893-89《The measure of water quality total phosphorus --- ammonium molybdate spectrophotometric
Method》；Water turbidity and colourity are directly measured by instrument；CODcr uses Hash colorimetric method for determining；
As shown in Figure 1, with the increase of dosage, total phosphorus concentration TP is down to 0.27mg/L, maximum material removal rate by 3.00mg/L
Reach 91.0%；Dosage is higher than after 100mg/L, and total phosphorus concentration variation is little.Clearly as can be seen that working as adding of agent
Measure for 80mg/L when, total phosphorus TP can be down to 0.92mg/L, and at this moment the removal rate of total phosphorus TP reaches 69.3%；When dosage exists
During 96mg/L, total phosphorus TP can be down to 0.42mg/L, and the removal rate of total phosphorus TP reaches 86.0% at this time；
As shown in Figure 2, which reaches the COD removal rates of coking wastewater more than 52% ((dosage is dosage to be above
500ppm), water outlet COD<80mg/L meets《Coking chemistry emission of industrial pollutants standard (GB16171-2012)》.
The above embodiment of the present invention is only to clearly demonstrate examples of the invention, but is not limited to this hair
Bright protection domain, all equivalent technical solutions fall within scope of the invention, and scope of patent protection of the invention should be by each
Item claim limits.
Claims (6)
1. a kind of preparation method of phosphorous polyiron sulfate, it is characterised in that：Including following operating procedure：
A ferrous sulfate mixed liquor), is configured, ferrous sulfate heptahydrate or ferrous sulfate monohydrate are added to the water in proportion, and stir
It mixes uniformly；
B the pH value of ferrous sulfate mixed liquor), is adjusted, in the ferrous sulfate mixed liquor of preparation, is slowly added in proportion under stiring
Enter organic phosphoric acid, sulfuric acid and nitric acid, adjust its pH value less than 1.0；
C oxidation reaction), is carried out, is depressed in room temperature, liquid oxygen adds in reactor after gasification, oxidation reaction is carried out, during reaction
Between be 40-50 minutes；
D), after reaction, the bodied ferric sulfate that iron-holder is phosphorous 0.5~1% is produced.
2. a kind of preparation method of phosphorous polyiron sulfate according to claim 1, it is characterised in that：The ferrous sulfate
The substandard goods ferrous sulfate of production titanium dioxide is used as raw material.
3. a kind of preparation method of phosphorous polyiron sulfate according to claim 1, it is characterised in that：The organic phosphoric acid
For 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP).
4. a kind of phosphoric polyferric sulfate flocculant, it is characterised in that：It is prepared using method described in claim 1；The poly- phosphorus sulfuric acid
In ferric flocculant product the full iron Fe3+ mass contents of active ingredient be 11%~15%, basicity for 13~25%, pH1.4~
1.6。
5. a kind of application of phosphoric polyferric sulfate flocculant processing coking wastewater, it is characterised in that：By the poly- phosphorus described in claim 4
Ferric sulfate flocculant is used for the removal of phosphorus and residual COD during coking wastewater deep treatment, including following operating procedure：
A), phosphoric polyferric sulfate flocculant is added to biochemical processing process section secondary clarifier effluent, reacts 1~2min；Dosage
For 100~500ppm；
B polyacrylamide), is added into solution, after quick stirring 30s, 30s, sedimentation time 10min is mixed slowly, gathers
The dosage of acrylamide is 1~2ppm；
C), supernatant collection is discharged after precipitation；After sludge is collected, separation of solid and liquid is realized through mechanical dehydration, mud cake enters coke
Stove is calcined, and entire technique is generated without waste water,waste gas and industrial residue.
6. a kind of application of phosphoric polyferric sulfate flocculant processing coking wastewater according to claim 5, it is characterised in that：Step
Rapid A) in phosphoric polyferric sulfate flocculant actual dosage need to according to secondary clarifier effluent matter and processing after, through beaker experiments integrate ratio
After determine.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109777425A (en) * | 2019-01-22 | 2019-05-21 | 袁艺宁 | A kind of preparation method and applications of phosphorus ferric sulfate polymer |
| CN111268779A (en) * | 2020-03-09 | 2020-06-12 | 常熟理工学院 | Method for quickly converting tributyl phosphate in waste liquid into polymerized iron phosphate flocculant |
| CN113716665A (en) * | 2021-09-22 | 2021-11-30 | 浙江吉泰新材料股份有限公司 | Method for preparing flocculating agent by utilizing strong-acid wastewater containing phosphorus and sulfur |
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| US5785862A (en) * | 1994-03-04 | 1998-07-28 | Imperial College Of Science Technology & Medicine | Preparation and uses of polyferric sulphate |
| KR20010038615A (en) * | 1999-10-26 | 2001-05-15 | 임정규 | Coagulant composition for water treatment and its use |
| CN1524800A (en) * | 2003-09-15 | 2004-09-01 | 武汉理工大学 | Method for preparing polymeric ferric phosphate sulfate |
| CN104709992A (en) * | 2015-03-26 | 2015-06-17 | 重庆大学 | Polymeric phosphorus ferric sulfate flocculating agent as well as preparation method and application thereof |
| CN105293657A (en) * | 2015-10-14 | 2016-02-03 | 河南卷烟工业烟草薄片有限公司 | Further treatment method of papermaking method reproduced tobacco leaf waste water |
| CN105753122A (en) * | 2016-04-21 | 2016-07-13 | 苏州云舒新材料科技有限公司 | Environment-friendly efficient composite flocculant |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785862A (en) * | 1994-03-04 | 1998-07-28 | Imperial College Of Science Technology & Medicine | Preparation and uses of polyferric sulphate |
| KR20010038615A (en) * | 1999-10-26 | 2001-05-15 | 임정규 | Coagulant composition for water treatment and its use |
| CN1524800A (en) * | 2003-09-15 | 2004-09-01 | 武汉理工大学 | Method for preparing polymeric ferric phosphate sulfate |
| CN104709992A (en) * | 2015-03-26 | 2015-06-17 | 重庆大学 | Polymeric phosphorus ferric sulfate flocculating agent as well as preparation method and application thereof |
| CN105293657A (en) * | 2015-10-14 | 2016-02-03 | 河南卷烟工业烟草薄片有限公司 | Further treatment method of papermaking method reproduced tobacco leaf waste water |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109777425A (en) * | 2019-01-22 | 2019-05-21 | 袁艺宁 | A kind of preparation method and applications of phosphorus ferric sulfate polymer |
| CN109777425B (en) * | 2019-01-22 | 2021-06-04 | 袁艺宁 | Preparation method and application of iron phosphosulfate polymer |
| CN111268779A (en) * | 2020-03-09 | 2020-06-12 | 常熟理工学院 | Method for quickly converting tributyl phosphate in waste liquid into polymerized iron phosphate flocculant |
| CN111268779B (en) * | 2020-03-09 | 2022-03-08 | 常熟理工学院 | Method for quickly converting tributyl phosphate in waste liquid into polymerized iron phosphate flocculant |
| CN113716665A (en) * | 2021-09-22 | 2021-11-30 | 浙江吉泰新材料股份有限公司 | Method for preparing flocculating agent by utilizing strong-acid wastewater containing phosphorus and sulfur |
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