CN103130258A - Preparation method of polymeric aluminum with high concentration high alcohol (Alc) content by making use of membrane distillation technology - Google Patents
Preparation method of polymeric aluminum with high concentration high alcohol (Alc) content by making use of membrane distillation technology Download PDFInfo
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- CN103130258A CN103130258A CN2011103851187A CN201110385118A CN103130258A CN 103130258 A CN103130258 A CN 103130258A CN 2011103851187 A CN2011103851187 A CN 2011103851187A CN 201110385118 A CN201110385118 A CN 201110385118A CN 103130258 A CN103130258 A CN 103130258A
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Abstract
The invention relates to a preparation method of polymeric aluminum with high concentration high alcohol (Alc) content by making use of membrane distillation technology. By means of the preparation method of the polymeric aluminum with the high concentration high Alc content by making use of the membrane distillation technology, on the basis of polymeric aluminum which is prepared through chemical synthesis and with concentration of 0.2-0.5 mol/L and albumin (Alb) content of 50-85%, low concentration (0.2-0.5 mol/L) and high Alc content (60-85%) polymeric aluminum solution is prepared through heat transmission, and then the high concentration high Alc content polymeric aluminum product with concentration larger than 2.0 mol/L and Alc content higher than 80% is prepared through the membrane distillation technology. The preparation method of the polymeric aluminum with the high concentration high Alc content by making use of the membrane distillation technology has an excellent flocculation effect and has good application prospect in the water processing field .
Description
Technical field
The present invention relates to a kind of film distillation technology that utilizes and prepare the high Al of high density
cThe method of content polymeric aluminum, product has a wide range of applications in fields such as water treatment flocculant, Neutral Synthetic Size From Rosin, nano composite material, pillared composites.
Background technology
In water treatment coagulation technology field, inorganic macromolecule flocculant poly aluminum chloride is the widest a kind of water treatment agent of present range of application.Polymerize aluminum chloride is that aluminum ion is hydrolyzed the kinetics intermediate product of one polymerization-precipitin reaction process under artificial forced hydrolysis condition, has the hydrolytic polymerization form of multiple mutual conversion in the aqueous solution, and recent research shows, except advantage form Al
13(Al
b) outside, Al
30(Alc) form is newfound another kind of advantage form, and it is the Al of Keggin structure under hot conditions
13The result that the further polymerization of form transforms.Al
30Form has 18 positive charges, and the unit particle diameter is about 2.0nm, has the Al of ratio
13Higher charge neutrality ability and morphological stability, its content height directly affects the performance of goods, finds that by analysis high Alc content correspondence high Al
30Content.Therefore, the polymeric aluminum product that how to obtain the high Alc content of high density has caused another target that the polymeric aluminum production technique is pursued.
The membrane distillation concentration method is a kind ofly to utilize hydrophobic microporous membrane with the solution of two kinds of differing tempss separately, take the partial pressure difference of fenestra both sides gaseous component as the mass transfer motivating force, thereby completes a kind of new membrane isolation technique of mass transfer.The primary process of membrane distillation obtains highly purified volatile matter in the distillate side simultaneously for obtain the concentrated solution of non-volatile substance in the feed liquid side, demonstrates superior performance at aspects such as high density material purifications at present.
Summary of the invention
Purpose of the present invention is exactly to adopt the membrane distillation concentration technology to prepare the high Alc content of high density polymeric aluminum taking full advantage of on membrane distillation concentration technology own characteristic basis.Adopt the technology of the present invention, can prepare total aluminium concentration greater than 2.0mol/L, Alc content is up to 85% the high Alc content of high density polymeric aluminum.
Main technical content of the present invention is: obtain in chemosynthesis carrying out the polymeric aluminum that thermal conversion is prepared the high Alc of lower concentration on the polymeric aluminum basis of the high Alb of lower concentration, then adopt the membrane distillation concentration technology to prepare the high Alc content of high density polymeric aluminum product.
Chemosynthesis temperature of the present invention is 40～65 ℃.
The polymeric aluminum solution of the high Alb of lower concentration of the present invention, total aluminium concentration are 0.2～0.5mol/L, and Alb content is 50～85%.
Thermal conversion temperature of the present invention is 80～120 ℃, and be 10～24h heat-up time.
The polymeric aluminum of the high Alc of lower concentration of the present invention, total aluminium concentration are 0.2～0.5mol/L, and Alc content is 60～85%
Membrane distillation concentration technology of the present invention, film used are flat board or mesopore rolling hydrophobic microporous membrane, and membrane material is polypropylene, tetrafluoroethylene and polyvinylidene difluoride (PVDF), and membrane pore size is 0.1～1.0 μ m; Under normal pressure, the film temperature difference maintains in 30～50 ℃ of scopes, makes the moisture in the polymeric aluminum solution of the high Alc content of lower concentration see through fenestra with the form of water vapour, constantly collects pure water in the membrane permeation side, carries out polymeric aluminum concentrated.
The high Alc content of high density of the present invention polymeric aluminum, total aluminium concentration are greater than 2.0mol/L, and Alc content is 60～85%.
Embodiment
Below in conjunction with a kind of method of utilizing the membrane distillation concentration technology to prepare the high Alc content of high density polymeric aluminum of the present invention, the specific embodiment of the present invention is described.
Embodiment 1:
Adding 190mL concentration in the there-necked flask of 2L is 1.0molL
-1AlCl
3Solution is 0.6molL with 700mL concentration
-1NaOH solution make basifier, in the time of 72 ℃ with 40mLmin
-1Speed add AlCl
3In the aqueous solution, make it reach predetermined basicity, continue reaction 20min, make total aluminium concentration Al
T=0.2molL
-1, Al
bContent is 84% polymeric aluminum solution; React the complete there-necked flask of reactant being put into 2L, stir and be warming up to 85 ℃ of reaction 12h; React and polymeric aluminum is carried out membrane distillation concentration after complete, adopting the aperture is the dull and stereotyped pvdf membrane material of 0.1 μ m, and 55 ℃ of hot side temperature, cold-side temperature are 20 ℃, and through the distillation and concentration of 50h, finally obtaining total aluminium concentration is 2.1mol/L, Al
cContent is 80% the high Al of high density
cThe polymeric aluminum of content.
Embodiment 2:
Adding 210mL concentration in the there-necked flask of 2L is 1.0molL
-1AlCl
3Solution is 0.6molL with 900mL concentration
-1NaOH solution make basifier, in the time of 72 ℃ with 40mL.min
-1Speed add AlCl
3In the aqueous solution, make it reach predetermined basicity, continue reaction 20min, make total aluminium concentration Al
T=0.3molL
-1, Al
bContent is 83% polymeric aluminum chlorides solution; React the complete there-necked flask of reactant being put into 2L, stir and be warming up to 95 ℃ of reaction 15h; React and polymeric aluminum is carried out membrane distillation concentration after complete, adopting the aperture is the dull and stereotyped pvdf membrane material of 0.4 μ m, and 65 ℃ of hot side temperature, cold-side temperature are 20 ℃, and through the distillation and concentration of 50h, finally obtaining total aluminium concentration is 2.2mol/L, Al
cContent is 83% the high Al of high density
cThe polymeric aluminum of content.
Embodiment 3:
Adding 210mL concentration in the there-necked flask of 2L is 1.0molL
-1AlCl
3Solution is 0.6molL with 900mL concentration
-1NaOH solution make basifier, in the time of 72 ℃ with 40mLmin
-1Speed add AlCl
3In the aqueous solution, make it reach predetermined basicity, continue reaction 20min, make total aluminium concentration Al
T=0.3molL
-1, Al
bContent is 85% polymeric aluminum chlorides solution; React the complete there-necked flask of reactant being put into 2L, stir and be warming up to 95 ℃ of reaction 15h; React and polymerize aluminum chloride is carried out membrane distillation concentration after complete, adopting the aperture is the hollow pvdf membrane material of 0.2 μ m, and 65 ℃ of hot side temperature, cold-side temperature are 20 ℃, and through the distillation and concentration of 70h, finally obtaining total aluminium concentration is 2.3mol/L, Al
cContent is 84% the high Al of high density
cThe polymeric aluminum of content.
Claims (7)
1. method of utilizing film distillation technology to prepare the high Alc content of high density polymeric aluminum.It is characterized in that: obtain in chemosynthesis carrying out the polymeric aluminum that thermal conversion is prepared the high Alc of lower concentration on the polymeric aluminum basis of the high Alb of lower concentration, then adopt the membrane distillation concentration technology to prepare the high Alc content of high density polymeric aluminum product.
2. chemosynthesis according to claim 1 is characterized in that: synthesis temperature is at 40～65 ℃.
3. the polymeric aluminum solution of the high Alb of lower concentration according to claim 1, it is characterized in that: total aluminium concentration is 0.2～0.5mol/L, Alb content is 50～85%.
4. thermal conversion according to claim 1, it is characterized in that: Heating temperature is 80～120 ℃, be 10～24h heat-up time.
5. the polymeric aluminum of the high Alc of lower concentration according to claim 1, it is characterized in that: total aluminium concentration is 0.2～0.5mol/L, Alc content is 60～85%.
6. membrane distillation concentration technology according to claim 1, it is characterized in that: film used is flat board or mesopore rolling hydrophobic microporous membrane, and membrane material is polypropylene, tetrafluoroethylene and polyvinylidene difluoride (PVDF), membrane pore size is 0.1～1.0 μ m; Under normal pressure, the film temperature difference maintains in 30～50 ℃ of scopes, makes the moisture in the polymeric aluminum solution of the high Alc content of lower concentration see through fenestra with the form of water vapour, constantly collects pure water in the membrane permeation side, carries out polymeric aluminum concentrated.
7. the high Alc content of high density polymeric aluminum according to claim 1, it is characterized in that: total aluminium concentration is greater than 2.0mol/L, and Alc content is 60～85%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103851187A CN103130258A (en) | 2011-11-28 | 2011-11-28 | Preparation method of polymeric aluminum with high concentration high alcohol (Alc) content by making use of membrane distillation technology |
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| CN2011103851187A CN103130258A (en) | 2011-11-28 | 2011-11-28 | Preparation method of polymeric aluminum with high concentration high alcohol (Alc) content by making use of membrane distillation technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104909440A (en) * | 2015-04-29 | 2015-09-16 | 南通大学 | New composite ethyl orthosilicate-polyaluminium chloride flocculant preparation method |
| CN111266080A (en) * | 2020-02-20 | 2020-06-12 | 中国科学院生态环境研究中心 | Modified HAP composite material for removing fluoride in water body, and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1796283A (en) * | 2004-12-24 | 2006-07-05 | 中国科学院生态环境研究中心 | Method and technique for preparing Nano type sol of polyaluminium chloride in high purity |
| CN1982216A (en) * | 2005-12-14 | 2007-06-20 | 中国科学院生态环境研究中心 | Method and apparatus for producing high-concentration and-purity nano-aluminum polychlorid by low-temperature film distillation technology |
| CN101468811A (en) * | 2007-12-27 | 2009-07-01 | 中国科学院生态环境研究中心 | Method for recovering alkali in aluminum oxide waste lye |
-
2011
- 2011-11-28 CN CN2011103851187A patent/CN103130258A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1796283A (en) * | 2004-12-24 | 2006-07-05 | 中国科学院生态环境研究中心 | Method and technique for preparing Nano type sol of polyaluminium chloride in high purity |
| CN1982216A (en) * | 2005-12-14 | 2007-06-20 | 中国科学院生态环境研究中心 | Method and apparatus for producing high-concentration and-purity nano-aluminum polychlorid by low-temperature film distillation technology |
| CN101468811A (en) * | 2007-12-27 | 2009-07-01 | 中国科学院生态环境研究中心 | Method for recovering alkali in aluminum oxide waste lye |
Non-Patent Citations (2)
| Title |
|---|
| ZHAO CHANGWEI ET AL.: ""Preparation of High Concentration Polyaluminum Chloride with High Alc Content by Membrane Distillation"", 《CHINESE JOURNAL OF CHEMICAL ENGINEERING》, vol. 19, no. 1, 28 February 2011 (2011-02-28), pages 173 - 176 * |
| 栾兆坤等: ""水解聚合铝溶液中Al30形态的研究"", 《化学进展》, vol. 17, no. 6, 30 November 2005 (2005-11-30), pages 1034 - 1039 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104909440A (en) * | 2015-04-29 | 2015-09-16 | 南通大学 | New composite ethyl orthosilicate-polyaluminium chloride flocculant preparation method |
| CN111266080A (en) * | 2020-02-20 | 2020-06-12 | 中国科学院生态环境研究中心 | Modified HAP composite material for removing fluoride in water body, and preparation method and application thereof |
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Application publication date: 20130605 |