CN103387239A - Novel silica gel washing method - Google Patents
Novel silica gel washing method Download PDFInfo
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- CN103387239A CN103387239A CN2013103245491A CN201310324549A CN103387239A CN 103387239 A CN103387239 A CN 103387239A CN 2013103245491 A CN2013103245491 A CN 2013103245491A CN 201310324549 A CN201310324549 A CN 201310324549A CN 103387239 A CN103387239 A CN 103387239A
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- silica gel
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Abstract
The invention discloses a novel silica gel washing method. The novel silica gel washing method comprises the following steps: preparing and ageing silica gel; tapping and washing the aged silica gel with seawater instead of tap water; washing the silica gel with tap water; drying the washed silica gel to prepare the silica gel. The gel is washed with seawater, so the limited freshwater resources are saved; the pH value of the seawater is 7.9 to 8.3, so the washing speed is increased by the ionized OH<->; the OH<-> has a chambering effect on the silica gel and gross-porosity silica gel with the pore volume requirement being more than 0.76 ml/g does not need to be subjected to ammonia soaking, so that the production efficiency of the silica gel is greatly improved and the production cost is reduced. The silica gel prepared by the silica gel washing method has the characteristic of high adsorbability. The novel silica gel washing method has a good economic benefit and a certain social benefit.
Description
Technical field
The invention belongs to inorganic silica gel production technique field, be specifically related to a kind of novel silica gel method for washing.
Background technology
The technical process of mostly adopting in the inorganic silica gel production field at present is certain density sulfuric acid and water glass glue, aging, rubber tapping, washing, ammonia bubble, the operation such as dry, owing to generating water glass in the glue process, and excessive acid, just completed aging silica gel for acid.Follow-up rubber tapping, washing two procedures main purpose are to remove water glass with a large amount of washings, and the pH value of glue are washed till in the terminal scope of processing requirement, then through operations such as ammonia bubble, dryings, make silica gel.1 ton of silica gel of every production need expend 20-30 ton water according to statistics.
China is the country of a drought and water shortage, and the water yield is only 2200 cubic metres per capita, is only 1/4 of world average level, ranks 121 in the world, is one of 13 countries that water resources is the poorest per capita in the whole world.The contradiction that expends between large water gaging in the shortage of water resources and inorganic silica gel production highlights day by day, therefore is badly in need of solving this technical problem.
Summary of the invention
The glue water requirement is larger for tapping rubber in the inorganic silica gel production process, washing, and the contradiction of tap water resource between relatively less, the invention provides a kind of novel silica gel method for washing, the technological improvement of carrying out mainly for washing process in inorganic silica gel production, the present invention specifically uses seawater to replace part of running water to tap rubber, wash, and makes silica gel with the laggard row oven dry of less tap water washing finally.
For achieving the above object, the present invention adopts following technical proposals to be achieved:
A kind of novel silica gel method for washing, silica gel through glue, aging after, discharge aging water, add the seawater of pH value 7.9-8.3 to tap rubber, tap rubber complete until the seawater liquid level during higher than glue face 30-50cm, stop adding seawater and carry out seawater and wash glue, controlling seawater, to wash the temperature of glue be 40-90 ℃, and seawater is washed glue, and to be washed till endpoint pH be 3.0-6.0; Then change the tap water washing, the water temperature of tap water washing is controlled at 40-85 ℃, and tap water is washed till terminal pH 〉=5.0, and then drying makes thick-hole block silica gel.
Further, to wash the glue preferred range be 50-60 ℃ to described seawater.
Further, to wash the preferred pH value of glue scope be 4.0-5.0 to described seawater.
Further, described tap water washing preferred range is 55-65 ℃.
Further, described tap water washing preferable range is pH 〉=5.8.
Further, the pore volume of described thick-hole block silica gel is more than 0.76ml/g.
Compared with prior art, advantage of the present invention and technique effect are: due to the weakly alkaline of seawater self and the singularity of moiety, the OH in seawater
-Enter in pore silicon-dioxide is had melting, so seawater has certain reaming effect to silica gel, pore volume is required to make in the direct oven dry after seawater washing, washing from the beginning of the silochrom more than 0.76ml/g, can remove ammonia bubble operation from.Wash glue with seawater and reach the time of endpoint pH because the weakly alkaline of seawater has also shortened, the whole silica gel Production Flow Chart time is shortened.Seawater is washed glue and has not only been improved washing speed, and has saved ammonia bubble operation, and this not only increases substantially silica gel production efficiency, and has reduced production cost.
Compare with existing inorganic silica gel production technique, advantage of the present invention and technique effect are: seawater rubber tapping of the present invention replaces part of running water washing process principal feature to be: (1) has saved limited Freshwater resources, is conducive to the Sustainable development of society and the protection of ecotope; (2) shortened and washed the time that reaches pH value terminal, improved the production efficiency of silica gel; (3) thick-hole block silica gel of pore volume index request more than 0.76ml/g removed from ammonia bubble operation, thereby improved production efficiency, reduced cost.
Embodiment
Below in conjunction with embodiment, technical scheme of the present invention is described in further detail.
Embodiment 1
Sulfuric acid, flower bulb alkali, by the rear glue, aging of concrete technology requirement concentration preparation, after aging end, are put into the aging water in ageing tank to specify storage place, then seawater is put into ageing tank and tap rubber.Tap rubber and completely until the seawater water surface, close the seawater valve during higher than glue face 30cm, add 45 ℃ of thermal control seawater water temperatures and carry out seawater and wash glue, adopt each water washing tank list to wash, go here and there the water-washing method of washing combination, be washed till blob of viscose pH value and reach at 3.2 o'clock and bleed off seawater; Add tap water to carry out tap water washing, 45 ℃ of temperature controls, stop washing while being washed till in glue pH value 5.8, dries and make thick-hole block silica gel.
Embodiment 2
Glue, aging after sulfuric acid, flower bulb alkali are prepared by processing requirement concentration, bleed off aging water after aging end, put into the seawater rubber tapping, the complete seawater valve of closing during higher than glue face 30cm until the seawater water surface of tapping rubber, control 45 ℃ of seawater water temperatures and carry out seawater and wash glue, and blob of viscose pH value reaches at 4.0 o'clock and bleeds off seawater, add tap water, 65 ℃ of temperature controls, stop washing while being washed till in glue pH value 6.0, dry and make silica gel.
Embodiment 3
Glue, aging after sulfuric acid, flower bulb alkali are prepared by processing requirement concentration, bleed off aging water after aging end, put into the seawater rubber tapping, the complete seawater valve of closing during higher than glue face 30cm until the seawater water surface of tapping rubber, control 65 ℃ of seawater water temperatures and carry out seawater and wash glue, and blob of viscose pH value reaches at 4.5 o'clock and bleeds off seawater, add tap water, 55 ℃ of temperature controls, stop washing while being washed till in glue pH value 6.0, dry and make silica gel.
Embodiment 4
Glue, aging after sulfuric acid, flower bulb alkali are prepared by processing requirement concentration, bleed off aging water after aging end, put into the seawater rubber tapping, the complete seawater valve of closing during higher than glue face 40cm until the seawater water surface of tapping rubber, control 75 ℃ of seawater water temperatures and carry out seawater and wash glue, and blob of viscose pH value reaches at 4.2 o'clock and bleeds off seawater, add tap water, 65 ℃ of temperature controls, stop washing while being washed till in glue pH value 6.0, dry and make silica gel.
Embodiment 5
Glue, aging after sulfuric acid, flower bulb alkali are prepared by processing requirement concentration, bleed off aging water after aging end, put into the seawater rubber tapping, the complete seawater valve of closing during higher than glue face 40cm until the seawater water surface of tapping rubber, control 55 ℃ of seawater water temperatures and carry out seawater and wash glue, and blob of viscose pH value reaches at 3.0 o'clock and bleeds off seawater, add tap water, 65 ℃ of temperature controls, stop washing while being washed till in glue pH value 6.0, dry and make silica gel.
The hole index is as shown in the table after testing for the silica gel that makes:
| Embodiment | Pore volume (ml/g) | Aperture () | Than table (m 2/g） |
| 1 | 0.78 | 81 | 385 |
| 2 | 0.81 | 88 | 367 |
| 3 | 0.79 | 79 | 401 |
| 4 | 0.85 | 83 | 412 |
| 5 | 0.80 | 81 | 396 |
Can be found out by index in above table, silica gel is washed, is washed from the beginning in the situation without ammonia bubble operation through seawater, and after oven dry, pore volume, all greater than 0.76ml/g, has reached the requirement of silochrom.Compare with traditional technology and saved ammonia bubble operation, reach the time of endpoint pH because the weakly alkaline of seawater has also shortened washing in addition.Not only improve production efficiency so seawater is washed glue, and reduced production cost.
Above embodiment is only in order to technical scheme of the present invention to be described, but not is limited; The technical scheme that those of ordinary skills put down in writing previous embodiment is modified or part technical characterictic wherein is equal to replacement, and these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of the present invention's technical scheme required for protection.
Claims (6)
1. novel silica gel method for washing, it is characterized in that: silica gel through glue, aging after, discharge aging water, add the seawater of pH value 7.9-8.3 to tap rubber, tap rubber complete until the seawater liquid level during higher than glue face 30-50cm, stop adding seawater and carry out seawater and wash glue, controlling seawater, to wash the temperature of glue be 40-90 ℃, and seawater is washed glue, and to be washed till endpoint pH be 3.0-6.0; Then change the tap water washing, the water temperature of tap water washing is controlled at 40-85 ℃, and tap water is washed till terminal pH 〉=5.0, and then drying makes thick-hole block silica gel.
2. a kind of novel silica gel method for washing according to claim 1, it is characterized in that: it is 50-60 ℃ that described seawater is washed the glue preferred range.
3. a kind of novel silica gel method for washing according to claim 1 and 2, it is characterized in that: it is 4.0-5.0 that described seawater is washed the preferred pH value of glue scope.
4. a kind of novel silica gel method for washing according to claim 1 is characterized in that: described tap water washing preferred range is 55-65 ℃.
5. according to claim 1 or 4 described a kind of novel silica gel method for washing is characterized in that: described tap water washing preferable range is pH 〉=5.8.
6. a kind of novel silica gel method for washing according to claim 1, it is characterized in that: the pore volume of described thick-hole block silica gel is more than 0.76ml/g.
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| CN201310324549.1A CN103387239B (en) | 2013-07-30 | 2013-07-30 | Novel silica gel washing method |
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| CN201310324549.1A CN103387239B (en) | 2013-07-30 | 2013-07-30 | Novel silica gel washing method |
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| CN103387239A true CN103387239A (en) | 2013-11-13 |
| CN103387239B CN103387239B (en) | 2014-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109292784A (en) * | 2018-10-25 | 2019-02-01 | 青岛美高集团有限公司 | A kind of preparation method of silica gel and thus resulting silica gel |
Citations (4)
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|---|---|---|---|---|
| US3178388A (en) * | 1961-10-03 | 1965-04-13 | Burke | Silica fillers reacted with sea water and uses thereof |
| CN1112519A (en) * | 1994-05-27 | 1995-11-29 | 梁儒诚 | Process for white fume |
| CN101795965A (en) * | 2007-06-27 | 2010-08-04 | J.M.休伯有限公司 | Composite caustic silica gel manufacturing method and gels made thereby |
| CN102923720A (en) * | 2012-11-20 | 2013-02-13 | 安徽科技学院 | Method for preparing nanometer white carbon black through comprehensively utilizing sodium chloride wastewater |
-
2013
- 2013-07-30 CN CN201310324549.1A patent/CN103387239B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3178388A (en) * | 1961-10-03 | 1965-04-13 | Burke | Silica fillers reacted with sea water and uses thereof |
| CN1112519A (en) * | 1994-05-27 | 1995-11-29 | 梁儒诚 | Process for white fume |
| CN101795965A (en) * | 2007-06-27 | 2010-08-04 | J.M.休伯有限公司 | Composite caustic silica gel manufacturing method and gels made thereby |
| CN102923720A (en) * | 2012-11-20 | 2013-02-13 | 安徽科技学院 | Method for preparing nanometer white carbon black through comprehensively utilizing sodium chloride wastewater |
Non-Patent Citations (2)
| Title |
|---|
| 赵希鹏: "大孔容高比表面积硅胶的制备", 《万方学位论文》, 30 November 2012 (2012-11-30) * |
| 赵希鹏: "硅胶的制备及应用现状", 《广州化工》, vol. 39, no. 24, 31 December 2011 (2011-12-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109292784A (en) * | 2018-10-25 | 2019-02-01 | 青岛美高集团有限公司 | A kind of preparation method of silica gel and thus resulting silica gel |
| CN109292784B (en) * | 2018-10-25 | 2021-10-01 | 青岛美高集团有限公司 | Preparation method of silica gel and silica gel obtained by preparation method |
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| CN103387239B (en) | 2014-12-17 |
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