CN1024916C - Composite flocculant containing polymerized silicic acid and aluminium and its prepn - Google Patents
Composite flocculant containing polymerized silicic acid and aluminium and its prepn Download PDFInfo
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- CN1024916C CN1024916C CN 91109348 CN91109348A CN1024916C CN 1024916 C CN1024916 C CN 1024916C CN 91109348 CN91109348 CN 91109348 CN 91109348 A CN91109348 A CN 91109348A CN 1024916 C CN1024916 C CN 1024916C
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- acid
- water
- aluminium
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- flocculation agent
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Abstract
The present invention relates to a polymerization silicic acid-aluminum composite flocculating agent which comprises the effective ingredients of the percentage contents: 4.5 to 7.0% of Al2O3, 3.5 to 6.0% of SiO2, 3.5 to 5.0% of Ca<2+>, 6.0 to 8.0% of Cl<-> and/or 0.5 to 3.5% of SO4<-2>, little amount of Mg<2+>, Fe<3+> and Mn<2+>, and water as the rest. The pH value of the flocculating agent is from 3.5 to 4.5. Bauxite or/and aluminum ash dregs are used as flocculation raw materials, and are dissolved by hydrochloric acid or/and sulphuric acid under normal pressure or the pressure of 2.0 to 3.0 kg/cm<2> and normal temperature or the temperature of 105 to 140 DEG C. The equivalent ratio of the acid to Al2O3 is from 1:0.55 to 1.2; the reaction time is from 4 to 8 hours. The dissolved raw materials are diluted with water and are added with calcium silicate to adjust the pH value to 3.5 to 4.5; the flocculation agent is prepared after the diluted raw materials are filtered and polymerized. The flocculating agent has the advantages of little corrosion, convenient use, easy acquirement of the raw materials, high acid utilization rate, low cost and superior water purification effect to PAC.
Description
The present invention relates to a kind of water treatment with flocculation agent and preparation method, specifically is a kind of polymeric silicicacid-aluminium salt composite flocculation agent and preparation method.
In water treatment, remove impurity and suspended state dispersed substance with flocculation agent, the flocculation agent that adopts has Tai-Ace S 150, iron trichloride, other low-molecular inorganic flocculation agent, polymerize aluminum chloride, polymeric silicicacid and other inorganic polymer flocculant, polyacrylamide and other organic polymer flocculation agent.
The Tai-Ace S 150 flocculation agent is inexpensive, but aggregation velocity is low, and the floss of formation is little, and when handling water at low temperature, congregation is carried out insufficiently.Can reduce basicity greatly with Tai-Ace S 150, must use with a large amount of alkali electroless medicines or other coagulant aids.
The iron trichloride treating water can form big floss, with heavy metal ion effective co-precipitation takes place, but iron trichloride corrodibility height, and it stable low needs and white lime uses together, can produce a large amount of mud.
The polymerize aluminum chloride force of flocculation is strong, even in water at low temperature, the formation speed of floss is also very fast, thereby is widely adopted, but polymerize aluminum chloride is produced raw materials used composition complexity, process is long, and the difficult control of condition is difficult to obtain the identical product of polymerizing power, and be subjected to the bauxitic clay activity influence, general water purification agent effective ingredient about 25% influences purifying water effect, and the aluminium salts contg is too high can to bring disadvantageous effect to HUMAN HEALTH again.Basicity is low besides, with a large amount of acid of alkali adjustment waste, makes the product cost height.
Though bodied ferric sulfate effect height, bigger to equipment corrosion, investment is many, the difficult control of water quality.
CN87101246A introduces Japanese a kind of water treatment method and flocculation agent, and it adopts high-polymeric silicic acid and little metal salt to use together.The advantage of this flocculation agent is that extremely strong ability of aggregation is arranged, the water treatment expense is taken low than conventional processing, but because of polymeric silicicacid water glass is produced, limited by raw material, difficult scale operation, and also polymeric silicicacid and metal-salt need be produced respectively, preserve, transportation and use are all than trouble, inconvenience is promoted, and becomes the polymeric silicicacid of gel in addition, can not be used as flocculation agent again.
Polyacrylamide and other organic polymer flocculation agent can form bigger floss with fast speeds, but the water that the shortcoming of organic floculant be cannot say for sure to demonstrate,prove after the processing is always safe and harmless.
Previous Chinese patent application of submitting to of the inventor numbers 90107193,5 and CN1050708A, a kind of polymeric silicate liquid flocculating agent and preparation method and a kind of polysilicate flocculant and preparation method have been introduced, be to be main raw material with blast furnace water slag, in case of necessity with addition of small amount of aluminum or iron, bauxitic clay, under normal temperature and pressure, molten, the polymerization of acid, in pH1.5-4.0 polymerization slaking, adjust then about pH value to 2, get the liquid flocculation agent, be dried to solid and make the solid flocculation agent, advantage is that raw material is cheap, technology is simpler, and product water purification power is strong, and cost is low.Its shortcoming is the preservation of liquid and uses pH value lower, and is bigger to equipment corrosion, and the pH value is too high to be easy to polymerization again, brings difficulty to preservation, the production of inconvenient specialized factory.
The objective of the invention is to gather the advantage of closing silicic acid flocculation agent and aluminium chlorohydroxide is one, and a kind of water purification agent and production method of efficient low aluminium is provided, and this flocculation agent raw material is easy to get, and corrodibility is little, and long preservative period is easy to use.
The technical measures that realize the object of the invention are to improve the ratio to 1 of silicic acid and aluminium salt: about 1.Utilize the interaction of silicic acid and aluminium salt can improve the principle of purifying water effect.Concrete preparation is with bauxitic clay or/and aluminium ash bits are raw material, at normal pressure or 2.0-3.0kg/cm
2Pressure, under the 105-140 ℃ of temperature with hydrochloric acid or/and sulfuric acid dissolution, reaction raw materials acid and Al
2O
3Equivalence ratio be 1: 0.55-1.2, dilute with water then, adding Calucium Silicate powder again, to adjust pH value be 3.5-4.2, polymerization 2-8 hour, get final product flocculant product.
Product effective component content weight percentage is that aluminium salt is by Al
2O
3Meter 4.5-7.0, polymeric silicicacid is pressed SiO
2Meter 3.5-6.0, Ca
++3.5-5.0, Cl
-6.0-8.0 all the other have a small amount of Mg
++, Fe
+++, M
++ DPH3.5-4.2.
As use hydrochloric acid and the production of vitriolic mixing acid, can keep SO
40.5-3.5%.
As replacing aluminium-containing substance to produce flocculation agent, as long as technology is improved a little with iron compound.
Advantage of the present invention is:
1. raw material is easy to get, and compares with aluminum chloride, can significantly reduce the difficulty that precipitation and pH adjust, and is convenient to industrial mass production.
2. compare with the polymerization aluminum chloride of bauxitic clay production, bauxitic clay can save valency 50%, and the hydrochloric acid utilization ratio can double, and aluminium content can reduce half in the product, can reduce aluminium salt pair human body, the particularly harm that the elderly's health is brought.
Embodiment 1:
Get 30% hydrochloric acid 700kg, water 700kg is to contain Al
2O
340% bauxitic clay 400kg is pressurized to 2.0-2.8kg/cm in reactor
2, start stirrer, temperature of reaction is controlled at 120-138 ℃, reacts 2-4 hour, take out, add water 1000kg dilution, when being chilled to 40-60 ℃, gradation adds Calucium Silicate powder 100kg, and agitation as appropriate, reacted 4-6 hour, when pH3.5-4.2, filter, got final product in polymerization 2-8 hour.
Embodiment 2:
Get 30% hydrochloric acid 700kg, water 700kg, to contain Al
2O
340% bauxitic clay 305kg in reactor, is pressurized to 2.0-2.8kg/cm
2, start stirrer, temperature of reaction is controlled at 120-138 ℃, reacts after 2-4 hour and to take out, and adds water 1000kg, and when being chilled to 40-60 ℃, gradation adds Calucium Silicate powder 170kg, and agitation as appropriate, reacts 4-6 hour, and when pH filters during to 3.5-4.2, polymerization 2-8 hour is promptly.
Embodiment 3:
Get 30% hydrochloric acid 700kg, water 700kg, to contain Al
2O
340% bauxitic clay 205kg, in reactor, pressurization 2.2-3.0kg/cm
2, start stirrer, temperature of reaction is controlled at 120-140 ℃, reacts taking-up in 2-4 hour, adds water 1000kg, is chilled to temperature 40-60 ℃ of gradation and adds Calucium Silicate powder 300kg, reacts 4-6 hour, and when pH filters during for 3.5-4.2, polymerization 2-8 hour is promptly.
Embodiment 4:
Get 30% hydrochloric acid 700kg, water 1400kg, to contain Al
2O
340% aluminium ash bits 170-350kg at normal temperatures and pressures, react 3-4 hour in container, added water 300kg, and gradation adding Calucium Silicate powder 90-240kg reacted 6-8 hour, and agitation as appropriate, when pH filters during to 3.5-4.5, got final product in polymerization 2-8 hour.
Embodiment 5:
Get 30% hydrochloric acid 700kg, water 700kg is to contain Al
2O
340% bauxitic clay 450kg in normal pressure and temperature 105-135 ℃ of following the reaction 4 hours, adds water 1000kg in container, gradation adds Calucium Silicate powder 110kg, and agitation as appropriate, reacts 6-8 hour, filters when pH3.5-4.2, gets final product in polymerization 2-8 hour.
The polymeric silicicacid that this law makes-aluminium salt mixture flocculation agent and aluminium chlorohydroxide (PAC) purifying water effect compare:
25 ℃ of former water pH7.2, temperature
(table is seen the literary composition back)
This shows that the purifying water effect of the flocculation agent of this law preparation is better than PAC.
Dosage raw water turbidity 15 minutes 30 minutes
Mg/l residual turbidity residual turbidity
The flocculation agent 10 500 20＜8 of this law preparation
PAC 12 500 25 8
The flocculation agent 12 1,000 25 8 of this law preparation
PAC 18 1000 30 10
The flocculation agent 18 2,000 30＜8 of this law preparation
PAC 25 2000 25 8
Annotate PAC and contain Al
2O
31.0% basicity B65% is that bauxitic clay is produced the synthetic product of CaO.
Claims (3)
1, a kind of method for preparing polymeric silicicacid-aluminium salt mixture flocculation agent is characterized in that with bauxitic clay or/and aluminium ash bits are raw material, at normal pressure or 2.0-3.0kg/cm
2Pressure, under normal temperature or the 105-140 ℃ temperature, with hydrochloric acid or/and sulfuric acid dissolution, reaction raw materials acid and Al
2O
3Equivalence ratio be 1: 0.55-1.2, reacted 4-8 hour, dilute with water then adds Calucium Silicate powder again and adjusts the pH value to 3.5-4.5, filters down at 40-60 ℃, stirs 2-8 hour, gets final product.
2, the method for preparing polymeric silicicacid-aluminium salt mixture flocculation agent as claim 1, when it is characterized in that being raw material, sour at normal temperatures and pressures molten with aluminium ash bits.
3, the method for preparing polymeric silicicacid-aluminium salt mixture flocculation agent as claim 1 is when is characterized in that being raw material with the bauxitic clay, at normal pressure or 2.0-3.0kg/cm
2Pressure, acid is molten under the 105-140 ℃ of temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91109348 CN1024916C (en) | 1991-09-28 | 1991-09-28 | Composite flocculant containing polymerized silicic acid and aluminium and its prepn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91109348 CN1024916C (en) | 1991-09-28 | 1991-09-28 | Composite flocculant containing polymerized silicic acid and aluminium and its prepn |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1059505A CN1059505A (en) | 1992-03-18 |
| CN1024916C true CN1024916C (en) | 1994-06-08 |
Family
ID=4909788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91109348 Expired - Fee Related CN1024916C (en) | 1991-09-28 | 1991-09-28 | Composite flocculant containing polymerized silicic acid and aluminium and its prepn |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1024916C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036387C (en) * | 1993-07-06 | 1997-11-12 | 李念章 | Production method for water purifying agent |
| KR100225565B1 (en) * | 1996-12-12 | 1999-10-15 | 유규재 | Process for preparing ultrafine particles of a calcium and magnesium salt of aluminium silicate |
| CN1325389C (en) * | 2004-05-28 | 2007-07-11 | 中国石油天然气股份有限公司 | Method for preparing poly aluminum silico-sulfate flocculant by using waste catalyst |
| CN102092828B (en) * | 2010-12-08 | 2012-10-03 | 东北电力大学 | Method for preparing polymer calcium-aluminum silicate coagulant from carbide slag |
| CN105217750A (en) * | 2014-05-27 | 2016-01-06 | 乔占印 | A kind of Domestic water purifying spirit and production technique thereof |
| CN108077306A (en) * | 2017-12-18 | 2018-05-29 | 徐州汇尔康食品有限公司 | A kind of environmental protection water purification fungicide |
| CN110723797B (en) * | 2019-11-04 | 2021-10-29 | 常熟理工学院 | Polysilicate aluminum cerium acrylate flocculant and preparation method and application thereof |
-
1991
- 1991-09-28 CN CN 91109348 patent/CN1024916C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1059505A (en) | 1992-03-18 |
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