CN86106921A - Synthesizing of a kind of modified zeolite - Google Patents
Synthesizing of a kind of modified zeolite Download PDFInfo
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- CN86106921A CN86106921A CN 86106921 CN86106921A CN86106921A CN 86106921 A CN86106921 A CN 86106921A CN 86106921 CN86106921 CN 86106921 CN 86106921 A CN86106921 A CN 86106921A CN 86106921 A CN86106921 A CN 86106921A
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- zeolite
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- crystallization
- ammonium
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- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
Synthesizing of a kind of modified zeolite is to be main raw material with the natural zeolite, adds a certain amount of aluminium hydroxide, Repone K, sodium hydroxide and water and carries out batch mixing, controls certain temperature and time and is carried out to glue and crystallization.Synthetic method of the present invention is simple, and cost is lower, can be used for from solution according to institute of the present invention synthetic product, is specially adapted to directly extract potassium and remove ammonium from seawater from waste water, also can be used to adsorb caesium, rubidium, strontium etc.It is dynamically inhaled potassium capacity and can reach 37 milligrams/gram and do, and inhales the ammonium capacity and can reach 36 milligrams/gram and do.
Description
The invention belongs to a kind of synthetic method of alkali exchange silico-aluminate of nonmetallic compound, relate to a kind of synthetic method that is used for the modified zeolite of k adsorption and ammonium.
Synthesizing of zeolite generally is that batch mixing becomes glue and crystallization regular hour at a certain temperature according to a certain percentage with chemical reagent such as compound that contains silicon and aluminium and alkali metal hydroxides.The permutite that obtains like this, exchange capacity are than higher, but the synthetic cost is higher, can't be in industrial application.Thereby, try to make a comment with natural zeolite by the method [" inorganic chemicals industry " of directly extracting sylvite in the seawater, 1～6 page of 1980 the 6th phase] and natural zeolite handle waste water and feedwater [" Treatment of Industrial Water ", 12～14 pages of the 1st phases of nineteen eighty-three] mention in two literary compositions and adopt using natural clinoptilolite as sorbent material, be used for from seawater, extracting potassium and from trade effluent, remove ammonium.The natural zeolite aboundresources, cheap and easy to get, but exchange capacity is lower.
The objective of the invention is with natural zeolite cheap and easy to get is main raw material, the synthetic high mineral ion sorbent material of a kind of exchange capacity.
Zeolite is a kind of aqueous alkali and alkaline-earth metal skeleton shape silico-aluminate, has uniform micropore, according to its effective pore radius, can be used for sieving the molecule or the ion that vary in size.The aperture of each zeolite, silica alumina ratio, loading capacity are fixed value.So clinoptilolite can be from solution preferentially adsorbed potassium and ammonium etc., the hydrated ionic radius that just is them is littler than the hydration radius of the ion of other coexistence such as sodium, calcium, magnesium etc., and the effective pore radius (4.0～4.4 of approaching clinoptilolite
) cause.So, if some natural zeolite is carried out chemical treatment, make its silica alumina ratio, aperture etc. do certain improvement, just can obtain being suitable for extracting potassium and the isoionic sorbent material of ammonium.
Implementing main points of the present invention is: natural zeolite powder and aluminium hydroxide, Repone K, sodium hydroxide and water are carried out batch mixing with certain mole ratio, under agitation become glue, and the crystallization of heating again, the powdered absorbent that obtains, useful binders is kneaded into granulated product.
The said batch mixing of the present invention, its mole ratio is:
SiO
2: Al
2O
3Be 4～6; Na
2O:SiO
2Be 0.28～0.5;
H
2O:Na
2O is 20～40; K
2O:K
2O+Na
2O is 0.25～0.5
Behind the batch mixing, need under agitation make silicon-dioxide and aluminum oxide in the natural zeolite constantly be dissolved into glue, gelatigenous optimal temperature is 20～50 ℃, and gelation time is 1～3 hour.Above said crystallization, just synthetic 48～72 hours 90～100 ℃ of following hydro-thermals, make former zeolite constantly transfer the material of another kind of crystal formation to, improve k adsorption and the isoionic purpose of ammonium to reach.Because the new crystal of crystallization gained is to crystallize out in the silica-alumina gel by excess base, the surface attachment of crystal grain has a large amount of oxyhydroxide, must the water flush away, otherwise can influence the quality of product.Through the resulting powdered modified zeolite of hydrothermal synthesis reaction, be difficult to mediate granulation with hydrophilic adhesive, to satisfy the requirement of ion exchange process in industrial application.
Natural zeolite of the present invention can be clinoptilolite or mordenite, or their any mixture.
Following Example is used for further specifying the present invention, also is optimum implementation of the present invention:
A kind of using natural clinoptilolite, its chemical constitution is (weight percent) by analysis:
SiO
2Al
2O
3K
2O Na
2O CaO MgO ∑Fe
65 11.9 1.89 4.04 3.5 1.02 0.5
Take by weighing 500 milliliters of above-mentioned zeolite powder 268.84 grams, industrial aluminium hydroxide 43.24 grams, Repone K 49.61 grams, sodium hydroxide 62.24 grams, water.Earlier with Repone K and dissolution of sodium hydroxide in water, under agitation aluminium hydroxide is dissolved in the heat alkali liquid, add zeolite powder at last, stirred 1.5 hours down at 25 ℃, static crystallization is 68 hours under 98 ℃, tells solution, and crystalline product washes with water to pH=8～10, granulation is mediated with hydrophilic adhesive in dry back, and it is standby to transfer the sodium type to sodium chloride solution then.
Because the present invention is to be main raw material with the natural zeolite, so product cost is lower, and synthetic method is simple.According to institute of the present invention synthetic modified zeolite, can be used for from solution, can be used for especially directly extracting potassium and from waste water, adsorbing ammonium from seawater, can also be used to adsorb caesium, rubidium, strontium etc.Its loading capacity is than using natural clinoptilolite high nearly one times (seeing attached list 1 and 2).
The performance of subordinate list 1 natural zeolite and k adsorption of the present invention relatively
| Adsorption medium | Suction type | Inhale potassium capacity (milligram/gram is done) | |
| Natural zeolite | The present invention | ||
| Pure KCl solution | Static | 50～60 | 85～90 |
| Seawater * | Static | 15～17 | 30～32 |
| Dynamically | 20 | 36～38 | |
* solution composition (grams per liter): K
+=0.38, Na
+=13, Ca
++=0.4
Mg
++＝1.5，Cl
-＝17，SO
2 4＝6.2
The performance that ammonium is adsorbed in subordinate list 2 natural zeolites and the present invention compares
| Adsorption medium | Suction type | Inhale ammonium capacity (milligram/gram is done) | |
| Natural zeolite | The present invention | ||
| Pure NH 4Cl solution | Static | 15 | 36 |
| Dynamically | 18 | 36 | |
| Contain NH 4 +Solution * | Static | 9 | 17 |
* solution composition (grams per liter): NH
+ 4=0.1, Na
+=0.4
K
+＝0.08，Ca
++＝0.4，Mg
++＝0.1
Claims (2)
1, a kind of modified zeolite is synthetic, be with containing the compound of silicon and aluminium and alkali metal hydroxide and water with certain mole ratio batch mixing, pass through again into glue and crystallization, feature of the present invention is to be main raw material with the natural zeolite, add aluminium hydroxide, Repone K, sodium hydroxide and water, its mole ratio be respectively:
SiO
2: Al
2O
3Be 4～6; Na
2O:SiO
2Be 0.28～0.5;
H
2O:Na
2O is 20～40; K
2O:K
2O+Na
2O is 0.25～0.5
Carry out batch mixing, under 20～50 ℃, became glue 1～3 hour, 90～100 ℃ of crystallization 48～72 hours.
2, synthetic according to the said a kind of modified zeolite of claim 1 is characterized in that said natural zeolite is meant clinoptilolite, or mordenite, or their any mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86106921 CN86106921A (en) | 1986-10-23 | 1986-10-23 | Synthesizing of a kind of modified zeolite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86106921 CN86106921A (en) | 1986-10-23 | 1986-10-23 | Synthesizing of a kind of modified zeolite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86106921A true CN86106921A (en) | 1988-05-04 |
Family
ID=4803415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86106921 Pending CN86106921A (en) | 1986-10-23 | 1986-10-23 | Synthesizing of a kind of modified zeolite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86106921A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084711C (en) * | 1998-11-21 | 2002-05-15 | 吉林大学 | Method for synthesizing zeolite molecular sieve using minerals as raw material |
| CN101303907B (en) * | 2008-06-23 | 2011-11-16 | 西南科技大学 | Back filling material for disposing radioactive waste and preparation method thereof |
| CN102423686A (en) * | 2011-11-01 | 2012-04-25 | 昆明理工大学 | Modified mordenite adsorbent and preparation method thereof |
| CN102964029A (en) * | 2012-11-19 | 2013-03-13 | 常州大学 | High-concentration ammonia-nitrogen wastewater treatment method for recycling ammonia and nitrogen and system thereof |
| CN103998376A (en) * | 2011-12-20 | 2014-08-20 | 东曹株式会社 | Strontium-exchanged clinoptilolite |
| CN104692406A (en) * | 2015-03-05 | 2015-06-10 | 中南大学 | Preparation method of adsorbent for selectively separating cesium ions from salt lake brine |
| CN103691393B (en) * | 2013-11-29 | 2015-08-26 | 核工业北京地质研究院 | Remove waterborne radioactivity from the beginning 137inorganic compounding adsorbent of Cs and preparation method thereof |
| CN115445572A (en) * | 2022-09-14 | 2022-12-09 | 中国地质大学（武汉） | Light porous oblique zeolite foam environment-friendly material and preparation method and application thereof |
-
1986
- 1986-10-23 CN CN 86106921 patent/CN86106921A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084711C (en) * | 1998-11-21 | 2002-05-15 | 吉林大学 | Method for synthesizing zeolite molecular sieve using minerals as raw material |
| CN101303907B (en) * | 2008-06-23 | 2011-11-16 | 西南科技大学 | Back filling material for disposing radioactive waste and preparation method thereof |
| CN102423686A (en) * | 2011-11-01 | 2012-04-25 | 昆明理工大学 | Modified mordenite adsorbent and preparation method thereof |
| CN102423686B (en) * | 2011-11-01 | 2016-02-03 | 昆明理工大学 | A kind of modified mordenite adsorbent and preparation method thereof |
| CN103998376A (en) * | 2011-12-20 | 2014-08-20 | 东曹株式会社 | Strontium-exchanged clinoptilolite |
| CN103998376B (en) * | 2011-12-20 | 2016-02-10 | 东曹株式会社 | Strontium exchanges clinoptilolite |
| CN102964029A (en) * | 2012-11-19 | 2013-03-13 | 常州大学 | High-concentration ammonia-nitrogen wastewater treatment method for recycling ammonia and nitrogen and system thereof |
| CN102964029B (en) * | 2012-11-19 | 2013-11-20 | 常州大学 | High-concentration ammonia-nitrogen wastewater treatment method for recycling ammonia and nitrogen and system thereof |
| CN103691393B (en) * | 2013-11-29 | 2015-08-26 | 核工业北京地质研究院 | Remove waterborne radioactivity from the beginning 137inorganic compounding adsorbent of Cs and preparation method thereof |
| CN104692406A (en) * | 2015-03-05 | 2015-06-10 | 中南大学 | Preparation method of adsorbent for selectively separating cesium ions from salt lake brine |
| CN115445572A (en) * | 2022-09-14 | 2022-12-09 | 中国地质大学（武汉） | Light porous oblique zeolite foam environment-friendly material and preparation method and application thereof |
| CN115445572B (en) * | 2022-09-14 | 2023-08-25 | 中国地质大学（武汉） | Lightweight porous clinoptilolite foam environment-friendly material and preparation method and application thereof |
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| WD01 | Invention patent application deemed withdrawn after publication |