CN103754890A - Preparation method for anhydrous sodium metasilicate - Google Patents
Preparation method for anhydrous sodium metasilicate Download PDFInfo
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- CN103754890A CN103754890A CN201310691724.0A CN201310691724A CN103754890A CN 103754890 A CN103754890 A CN 103754890A CN 201310691724 A CN201310691724 A CN 201310691724A CN 103754890 A CN103754890 A CN 103754890A
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- sodium metasilicate
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Abstract
The invention provides a preparation method for anhydrous sodium metasilicate. The preparation method comprises the following steps: adding pretreated quartz sand and liquid alkali with a concentration of 30 to 35% according to a weight ratio of 2.5-3.5: 1 into a mixing kettle and carrying out a reaction at a temperature of 100 to 150 DEG C; subjecting a reacted clear liquid to regulation, allowing a crystal to be precipitated, carrying out solid-liquid separation, then carrying out continuous atomization, granulation and drying so as to obtain sodium metasilicate pentahydrate, putting prepared sodium metasilicate pentahydrate into a rotary drying bed and removing moisture in sodium metasilicate through heating with hot air so as to obtain anhydrous sodium metasilicate; and carrying out solid-liquid separation by using an automatic piston centrifuge and adjusting a gap between filter boards. The preparation method has the following advantages: caustic soda with a concentration of 30 to 35% obtained after electrolysis with an ion-exchange film is directly used to react with quartz sand, so the procedure of evaporative concentration in conventional production processes is omitted, steam consumption is reduced, production time is shortened, energy is saved, and cost is low.
Description
Technical field
The present invention relates to chemical technology field, particularly a kind of preparation method of anhydrous sodium metasilicate.
Background technology
In adopting quartz sand and the ordinary method of caustic soda as raw material production Starso, conventionally the strength of solution of caustic soda is more than 38%, at this moment, must carry out evaporation concentration to the caustic soda of electrolysis 32% left and right out could use, need evaporating concentration process, extended the production time, also caused the waste of the energy, cost is high.
Summary of the invention
Object of the present invention is just to provide a kind ofly directly utilizes the caustic soda that electrolysis with ion-exchange film concentration is out 30-35% directly to react with quartz sand, reduces steam consumption, the preparation method of the anhydrous sodium metasilicate reducing production costs.
Solution of the present invention is such:
A preparation method for anhydrous sodium metasilicate, is characterized in that: comprise step:
(1), by pretreated quartz sand and concentration, being 30-35%, liquid caustic soda drops into mixing kettle by weight 2.5-3.5:1 ratio, then under 100-150 ° of C temperature range, react;
The equation in ingredient of SiO2 and NaOH:
mSiO2＋2NaOH＝Na2O·mSiO＋H2O
M is modulus, m=SiO2/ Na2O * 1.032
Batching foundation: m=2.4, calculates silicon-dioxide and caustic soda input ratio with this
(2), reacted clear liquid is carried out to mode transfer, crystallization, it is 0.5-1 that clear liquid is adjusted modulus, treats that solution temperature, 40-55 ℃ of left and right, starts to add crystal seed; In tank, material is concentrated into density 1.7(suggestion and provides scope) time, stop logical vapour concentrated, prepare blowing, after solid-liquid separation, adopt continuous atomization granulating drying technology to obtain metasilicate pentahydrate sodium;
(3), the metasilicate pentahydrate sodium of preparation put into Rotary drying bed use warm air beating to remove Starso moisture content, obtain anhydrous sodium metasilicate.
Technical scheme also comprises more specifically: in described continuous atomization granulating drying technology, control temperature is 80-90 ℃.
Further: described solid-liquid separation adopts automatic piston whizzer to carry out, and filter plate gap is adjusted.
Further: described automatic centrifuge goes to mix with quartz sand with the pre-stirred pot that the mother liquor of pressure filter is sent reactor back to by transport pipe, then adds reactor to go.
Further: the temperature that described Rotary drying bed is used warm air to heat is 80-90 ℃.
Advantage of the present invention is directly to utilize the caustic soda that electrolysis with ion-exchange film concentration is out 30-35% directly to react with quartz sand, exempts evaporating concentration process in original production process, reduces the consumption of steam, shortens the production time, save energy, and cost is low.
Accompanying drawing explanation
Accompanying drawing 1 is FB(flow block) of the present invention.
Embodiment
As shown in Figure 1, the present invention includes step:
(1), by pretreated quartz sand 490kg and concentration, being 30-35%, liquid caustic soda 284kg ratio drops into mixing kettle, the steam that leads to 0.89t reacts under 100-150 ° of C temperature range;
The equation in ingredient of SiO2 and NaOH:
mSiO2＋2NaOH＝Na2O·mSiO＋H2O
M is modulus, m=SiO2/ Na2O * 1.032
Batching foundation: m=2.4, calculates silicon-dioxide and caustic soda input ratio with this.
(2), reacted clear liquid is carried out to mode transfer, crystallization, it is 0.5-1 that clear liquid is adjusted modulus, treats that solution temperature, 40-55 ℃ of left and right, starts to add crystal seed; In tank, material is concentrated into density 1.7(suggestion and provides scope) time, stop logical vapour concentrated, prepare blowing, after solid-liquid separation, adopt continuous atomization granulating drying technology to obtain metasilicate pentahydrate sodium.
(3), the metasilicate pentahydrate sodium of preparation put into Rotary drying bed use warm air beating to remove Starso moisture content, obtain anhydrous sodium metasilicate.
(4), in described continuous atomization granulating drying technology, control temperature is 80-90 ℃.
(5), described solid-liquid separation adopts automatic piston whizzer to carry out, and filter plate gap is adjusted.
(6), Recycling Mother Solution used, the mother liquor of automatic centrifuge and pressure filter can reclaim, the pre-stirred pot of getting back to reactor goes to mix with quartz sand, then adds reactor to go.
Claims (5)
1. a preparation method for anhydrous sodium metasilicate, is characterized in that: comprise step:
(1), by pretreated quartz sand and concentration, being 30-35%, liquid caustic soda drops into mixing kettle by weight 2.5-3.5:1 ratio, then under 100-150 ° of C temperature range, react;
(2), reacted clear liquid is carried out to mode transfer, crystallization, it is 0.5-1 that clear liquid is adjusted modulus, treats that solution temperature, 40-55 ℃ of left and right, starts to add crystal seed; In tank, material is concentrated into density 1.7(suggestion and provides scope) time, stop logical vapour concentrated, prepare blowing, after solid-liquid separation, adopt continuous atomization granulating drying technology to obtain metasilicate pentahydrate sodium;
(3), the metasilicate pentahydrate sodium of preparation put into Rotary drying bed use warm air beating to remove Starso moisture content, obtain anhydrous sodium metasilicate.
2. the preparation method of anhydrous sodium metasilicate according to claim 1, is characterized in that: in described continuous atomization granulating drying technology, control temperature is 80-90 ℃.
3. the preparation method of anhydrous sodium metasilicate according to claim 2, is characterized in that: described solid-liquid separation adopts automatic piston whizzer to carry out, and filter plate gap is adjusted.
4. the preparation method of anhydrous sodium metasilicate according to claim 3, is characterized in that: described automatic centrifuge goes to mix with quartz sand with the pre-stirred pot that the mother liquor of pressure filter is sent reactor back to by transport pipe, then adds reactor to go.
5. the preparation method of anhydrous sodium metasilicate according to claim 1, is characterized in that: the temperature that described Rotary drying bed is used warm air to heat is 80-90 ℃.
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| CN201310691724.0A CN103754890A (en) | 2013-12-17 | 2013-12-17 | Preparation method for anhydrous sodium metasilicate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104118880A (en) * | 2014-07-02 | 2014-10-29 | 广州立白企业集团有限公司 | Automatic blending process and equipment for wet-method sodium metasilicate production |
| CN110002457A (en) * | 2019-05-21 | 2019-07-12 | 江西省欧陶科技有限公司 | A method of zero water sodium metasilicate is produced using wet process waterglass filter residue |
Citations (7)
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|---|---|---|---|---|
| US4367073A (en) * | 1981-06-25 | 1983-01-04 | Henkel Kommanditgesellschaft Auf Aktien | Preparation of solid, crystalline, substantially anhydrous sodium metasilicate |
| CN1052645A (en) * | 1989-11-23 | 1991-07-03 | 亨克尔两合股份公司 | The preparation method of alkalimetal silicate |
| RU2213694C1 (en) * | 2002-03-11 | 2003-10-10 | Березниковское ООО "Сода-хлорат" | Sodium metasilicate pentahydrate manufacture method |
| CN101279738A (en) * | 2008-05-12 | 2008-10-08 | 崔国强 | Method for preparing liquid sodium silicate by one-step liquid phase reaction |
| CN102115092A (en) * | 2011-04-22 | 2011-07-06 | 冷水江三A化工有限责任公司 | Method for producing high-modulus sodium silicate by adopting liquid phase method |
| CN102701228A (en) * | 2012-05-28 | 2012-10-03 | 朔州市润泽投资发展有限公司 | Recycling method of caustic alkaline liquid for treatment of high-silicon aluminum ore material |
| CN103738973A (en) * | 2013-12-17 | 2014-04-23 | 柳州东风化工股份有限公司 | Preparation method of sodium metasilicate pentahydrate |
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2013
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| US4367073A (en) * | 1981-06-25 | 1983-01-04 | Henkel Kommanditgesellschaft Auf Aktien | Preparation of solid, crystalline, substantially anhydrous sodium metasilicate |
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| RU2213694C1 (en) * | 2002-03-11 | 2003-10-10 | Березниковское ООО "Сода-хлорат" | Sodium metasilicate pentahydrate manufacture method |
| CN101279738A (en) * | 2008-05-12 | 2008-10-08 | 崔国强 | Method for preparing liquid sodium silicate by one-step liquid phase reaction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104118880A (en) * | 2014-07-02 | 2014-10-29 | 广州立白企业集团有限公司 | Automatic blending process and equipment for wet-method sodium metasilicate production |
| CN104118880B (en) * | 2014-07-02 | 2016-01-20 | 广州立白企业集团有限公司 | A kind of wet production sodium silicate automatic blending Processes and apparatus |
| CN110002457A (en) * | 2019-05-21 | 2019-07-12 | 江西省欧陶科技有限公司 | A method of zero water sodium metasilicate is produced using wet process waterglass filter residue |
| CN110002457B (en) * | 2019-05-21 | 2022-03-22 | 江西省欧陶科技有限公司 | Method for producing zero-water sodium metasilicate by using wet-process water glass filter residues |
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Application publication date: 20140430 |