CN105314687A - Preparation method of polymeric ferric sulfate - Google Patents
Preparation method of polymeric ferric sulfate Download PDFInfo
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- CN105314687A CN105314687A CN201510857714.9A CN201510857714A CN105314687A CN 105314687 A CN105314687 A CN 105314687A CN 201510857714 A CN201510857714 A CN 201510857714A CN 105314687 A CN105314687 A CN 105314687A
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- sulfate
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- ferric sulfate
- sodium hydroxide
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Abstract
The invention provides a preparation method of polymeric ferric sulfate, and belongs to the technical field of preparation of flocculating agents. According to the method, ferrous sulfate and ferric sulfate are selected as raw materials; an inorganic base is selected as a reactant; by the characteristic that ferrous hydroxide is easily oxidized into ferric hydroxide by air in an alkaline condition, ferrous sulfate is converted into ferric hydroxide; and a proper amount of sulfuric acid is added for polymerization reaction for a period of time, so as to obtain polymeric ferric sulfate. Compared with an existing preparation method for common polymeric ferric sulfate, the technological process is relatively short in elapsed time, good in process repeatability, free of a poisonous and harmful gas, simple in equipment and controllable in cost, and has obvious economic value.
Description
Technical field
The invention belongs to flocculation agent preparing technical field.Be specifically related to a kind of preparation method of aggretion type ferric sulfate.
Background technology
Bodied ferric sulfate (PFS) is a kind of New Inorganic High Polymer Coagulant, has the features such as hydrolysis rate is fast, floc density is large, pH is applied widely, little to equipment corrosion, production cost is low.In PFS and suspended particle electric charge very capable, specific surface area is large, high adsorption capacity, the impurity such as suspended substance, microorganism, organism, sulfide, heavy metal ion in water can be removed well, and the functions such as decolouring, deodorizing, breakdown of emulsion and sludge dewatering are comparatively strong, are widely used in the process of service water, municipal effluent and tap water.
According to the difference of mode of oxidizing, the preparation method of bodied ferric sulfate is mainly divided into direct oxidation method and catalytic oxidation.The preparation of industrial most of bodied ferric sulfate adopts direct oxidation method, and this method operational path is comparatively simple, can reduce facility investment and production link for industrial production, reduce equipment cost, but this production technique must depend on oxygenant, as: H
2o
2, KClO
3, HNO
3deng inorganic oxidizer.If select H in direct oxidation method
2o
2for catalyzer, then cost compare is high; Select KClO
3for remaining higher chlorion and chloranion in catalyzer then product, be unsuitable for drinking water treatment, Potcrate is expensive simultaneously; Select HNO
3for can NO be generated in reaction during catalyzer
2, processed for avoiding causing environmental pollution need increase special absorption unit.Catalytic oxidation is generally oxygenant with air, production cost is relatively low, but need carry out at higher temperature and certain pressure, the simultaneous reactions time is longer, also need waste gas purification apparatus to be installed to slough a large amount of oxides of nitrogen gas produced in reaction process, technical process is complicated, higher to equipment requirements, invests larger.In summary it can be seen in existing method and all have obvious deficiency, therefore, the poly ferric sulfate preparation method finding the environmental issues such as a kind of technique is simple, cost is controlled, emission-free purification has obvious economic benefit and social benefit.
Summary of the invention
The present invention is directed to the problems referred to above existed in current poly ferric sulfate preparation method, propose a kind of new aggretion type ferric sulfate preparation method.Present method selects ferrous sulfate and ferric sulfate to be raw material, and mineral alkali is reagent.First utilize ferrous hydroxide under alkaline condition to be easily oxidised with air to the feature of ironic hydroxide, make ferrous sulfate change ironic hydroxide into, then add moderate amount of sulfuric acid polyreaction certain hour, obtain molecular formula for [Fe
2(OH)
n(SO
4)
3-n/2]
mbodied ferric sulfate.Do not use expensive oxygenant relative in present method direct oxidation method, and release without obnoxious flavour; Relative catalytic oxidation style present method effectively shortens the reaction times and releases without obnoxious flavour; Present method also by-product Sodium sulfate anhydrous.min(99), effectively improves economic value added simultaneously.According to 2013 yearly correlation price of chemical products measuring and calculating, total raw material cost about 870 yuan/ton, corresponding generation about 2000 yuan of value products, thus present method has obvious economic worth.
Concrete steps of the present invention are as follows:
(1) corresponding amount ferrous sulfate and sodium hydroxide is taken respectively by amount of substance 1:2,50% sodium hydroxide is configured to the sodium hydroxide solution of certain mass mark, in sodium hydroxide solution, add ferrous sulfate and residual hydrogen sodium oxide under blowing air agitation condition simultaneously, reaction certain hour, filtering separation, and with a small amount of hot wash filter cake, obtain filter cake and filtrate;
(2) filter cake adds a small amount of water and is modulated into thickness pulpous state, adds moderate amount of sulfuric acid under strong stirring condition, and reaction certain hour, namely obtains polyaluminum sulfate iron product;
(3) filtrate that step (1) obtains makes wherein sodium sulfate separate out by crystallisation by cooling, obtains byproduct Sodium sulfate anhydrous.min(99).
embodiment:
embodiment 1:corresponding amount ferrous sulfate 278g and sodium hydroxide 80g is taken respectively by amount of substance 1:2,40g sodium hydroxide is configured to the sodium hydroxide solution 200g that massfraction is 20%, in sodium hydroxide solution, add ferrous sulfate and residual hydrogen sodium oxide under blowing air agitation condition simultaneously, evenly add in 10min, continue stirring reaction 50min, filtering separation, and with a small amount of hot wash filter cake, obtain filter cake and filtrate; Filter cake adds 200mL and is modulated into thickness pulpous state, adds the vitriol oil of 60mL mass concentration 98% under strong stirring condition, and reaction 20min, namely obtains bodied ferric sulfate.The filtrate that said process obtains makes wherein sodium sulfate separate out by crystallisation by cooling, obtains byproduct Sodium sulfate anhydrous.min(99).
embodiment 2:corresponding amount ferrous sulfate 278g and sodium hydroxide 80g is taken respectively by amount of substance 1:2,40g sodium hydroxide is configured to the sodium hydroxide solution 400g that massfraction is 10%, in sodium hydroxide solution, add ferrous sulfate and residual hydrogen sodium oxide under blowing air agitation condition simultaneously, evenly add in 10min, continue stirring reaction 30min, filtering separation, and with a small amount of hot wash filter cake, obtain filter cake and filtrate; Filter cake adds 200mL and is modulated into thickness pulpous state, adds the vitriol oil of 70mL mass concentration 98% under strong stirring condition, and reaction 20min, namely obtains polyaluminum sulfate iron product.The filtrate that said process obtains makes wherein sodium sulfate separate out by crystallisation by cooling, obtains byproduct Sodium sulfate anhydrous.min(99).
embodiment 3:corresponding amount ferrous sulfate 278g and sodium hydroxide 80g is taken respectively by amount of substance 1:2,40g sodium hydroxide is configured to the sodium hydroxide solution 267g that massfraction is 15%, in sodium hydroxide solution, add ferrous sulfate and residual hydrogen sodium oxide under blowing air agitation condition simultaneously, evenly add in 10min, continue stirring reaction 40min, filtering separation, and with a small amount of hot wash filter cake, obtain filter cake and filtrate; Filter cake adds 200mL and is modulated into thickness pulpous state, adds the vitriol oil of 54mL mass concentration 98% under strong stirring condition, and reaction 20min, namely obtains polyaluminum sulfate iron product.The filtrate that said process obtains makes wherein sodium sulfate separate out by crystallisation by cooling, obtains byproduct Sodium sulfate anhydrous.min(99).
Claims (5)
1. a preparation method for aggretion type ferric sulfate, is characterized in that the method concrete steps are as follows:
(1) corresponding amount ferrous sulfate and sodium hydroxide is taken respectively by amount of substance 1:2,50% sodium hydroxide is configured to the sodium hydroxide solution of certain mass mark, in sodium hydroxide solution, add ferrous sulfate and residual hydrogen sodium oxide under blowing air agitation condition simultaneously, reaction certain hour, filtering separation, and with a small amount of hot wash filter cake, obtain filter cake and filtrate;
(2) filter cake adds a small amount of water and is modulated into thickness pulpous state, adds moderate amount of sulfuric acid under strong stirring condition, and reaction certain hour, namely obtains polyaluminum sulfate iron product;
(3) filtrate that step (1) obtains makes wherein sodium sulfate separate out by crystallisation by cooling, obtains byproduct Sodium sulfate anhydrous.min(99).
2. according to claim 1, a kind of preparation method of aggretion type ferric sulfate, is characterized in that: the mass fraction of the sodium hydroxide solution described in step (1) is 10 ~ 20%.
3. according to claim 1, a kind of preparation method of aggretion type ferric sulfate, is characterized in that: the reaction times described in step (1) is 30 ~ 50min.
4. according to claim 1, a kind of preparation method of aggretion type ferric sulfate, is characterized in that: the sulfuric acid described in step (2) is the industrial sulphuric acid of mass concentration 98%.
5. according to claim 1, a kind of preparation method of aggretion type ferric sulfate, is characterized in that: the sulfuric acid described in step (2) is the industrial sulphuric acid of mass concentration 98%, and the amount adding sulfuric acid can just regulate the amount of substance ratio of sulfuric acid and iron between 1 ~ 1.3:1.
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|---|---|---|---|
| CN201510857714.9A CN105314687A (en) | 2015-11-30 | 2015-11-30 | Preparation method of polymeric ferric sulfate |
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| CN201510857714.9A CN105314687A (en) | 2015-11-30 | 2015-11-30 | Preparation method of polymeric ferric sulfate |
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| CN105314687A true CN105314687A (en) | 2016-02-10 |
Family
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109502655A (en) * | 2019-01-25 | 2019-03-22 | 杭州秀澈环保科技有限公司 | A kind of production technology of bodied ferric sulfate |
Citations (4)
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|---|---|---|---|---|
| CN102070198A (en) * | 2011-02-28 | 2011-05-25 | 湖南科技大学 | Method for preparing high-purity manganese sulfate and high-purity manganese carbonate by reduction leaching of pyrolusite through scrap iron |
| CN103864154A (en) * | 2014-03-27 | 2014-06-18 | 李科 | Production method of liquid polymeric ferric sulfate water purifying agent |
| CN104891537A (en) * | 2015-05-20 | 2015-09-09 | 南阳东方应用化工研究所 | Comprehensive utilization method of silicate minerals |
| CN104986838A (en) * | 2015-07-02 | 2015-10-21 | 季红军 | Preparation method for water treatment agent |
-
2015
- 2015-11-30 CN CN201510857714.9A patent/CN105314687A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070198A (en) * | 2011-02-28 | 2011-05-25 | 湖南科技大学 | Method for preparing high-purity manganese sulfate and high-purity manganese carbonate by reduction leaching of pyrolusite through scrap iron |
| CN103864154A (en) * | 2014-03-27 | 2014-06-18 | 李科 | Production method of liquid polymeric ferric sulfate water purifying agent |
| CN104891537A (en) * | 2015-05-20 | 2015-09-09 | 南阳东方应用化工研究所 | Comprehensive utilization method of silicate minerals |
| CN104986838A (en) * | 2015-07-02 | 2015-10-21 | 季红军 | Preparation method for water treatment agent |
Non-Patent Citations (2)
| Title |
|---|
| 阮复昌等: ""各种聚合硫酸铁生产方法的评比"", 《化学工业与工程》 * |
| 黄映恒: ""软锰矿直接浸取硫酸锰副产聚合硫酸铁的实验"", 《河池师专学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109502655A (en) * | 2019-01-25 | 2019-03-22 | 杭州秀澈环保科技有限公司 | A kind of production technology of bodied ferric sulfate |
| CN109502655B (en) * | 2019-01-25 | 2023-08-08 | 杭州秀澈环保科技有限公司 | Production process of polymeric ferric sulfate |
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Application publication date: 20160210 |
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