CN1290653A - Method for preparing granular anhydrous sodium metasilicate - Google Patents
Method for preparing granular anhydrous sodium metasilicate Download PDFInfo
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- CN1290653A CN1290653A CN 00120596 CN00120596A CN1290653A CN 1290653 A CN1290653 A CN 1290653A CN 00120596 CN00120596 CN 00120596 CN 00120596 A CN00120596 A CN 00120596A CN 1290653 A CN1290653 A CN 1290653A
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- anhydrous sodium
- sodium metasilicate
- warm air
- modulus
- granular anhydrous
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Abstract
Anhydrous sodium metasilicate is prepared by using sodium silicate as material and through the processes of measuring the modulus of water solution of sodium silicate, regulating the modulus with sodium hydroxide to 0.9-1.04, concentrating through heating at the temperature below the boiling point of the solution to weight concentration of 50-55 %, spraying via 2.0-2.5 mm diameter nozzles at 80-90 Kg/sq cm pressure and counter current spray drying with hot air at inlet temperature of 340-350 deg.C and outlet temperatuer of 80-90 deg.C.
Description
That the present invention relates to is a kind of preparation method of granular anhydrous sodium metasilicate.
The method for preparing anhydrous sodium metasilicate at present commonly used can have with the dry production of the yellow soda ash of fusion equimolar amount and silicon-dioxide mode and, with heat two kinds of the wet production of dissolved under pressure silicon-dioxide mode of liquid sodium hydroxide.Also having reported a kind of in publication number is the Chinese patent literature of CN1153139A is raw material with natural potassium felspar sand, through pulverizing, batching, roasting, pressurization water logging, filtration, concentrate and countercurrent spray after, change many steps such as crystal formation through compacting, calcining again, obtain the powdered anhydrous sodium metasilicate.The step of its method is more, and route is longer.In addition, publication number is that also to have reported with water glass and sodium hydroxide be the method that feedstock production metasilicate pentahydrate sodium and non-hydrate sodium metasilicate etc. have water sodium metasilicate to Chinese patent literatures such as CN1188741A and CN1223232A.
Given this, the objective of the invention is to provide a kind of method for preparing anhydrous sodium metasilicate, particularly granular anhydrous sodium metasilicate more simply and easily at above-mentioned situation.
The preparation method of granular anhydrous sodium metasilicate of the present invention, be to be raw material with the water glass, to its determination of aqueous solution modulus and with sodium hydroxide its modulus is adjusted to 0.99-1.04, after heating under the temperature that is lower than the solution boiling point is concentrated into weight concentration and is 50%-55%, is the ejection of 2.0-2.5 millimeter nozzle with 80-90 kilogram/cm2 pressure through diameter, carry out countercurrent spray with warm air, dry inlet temperature with warm air is 340 ℃-350 ℃, and temperature out is 80 ℃-90 ℃.Be to guarantee and further improve the quality of prepared granular anhydrous sodium metasilicate product, used warm air is heated pure warm air after the dedusting after filtration when preferably making above-mentioned countercurrent spray.Be appreciated that thus, owing to carry out after aforesaid method is made the aqueous solution with water glass, therefore be solid form or liquid form to raw materials used water glass, and/or it is all unimportant whether to contain crystal water, only needs to get final product showing in its aqueous solution that wherein the modulus of silicon-dioxide and the ratio of sodium oxide mole number is adjusted to above-mentioned requirements.Because two kinds of used raw materials of the inventive method all are easy to get, and preparation process is few, and route is short, the also corresponding reduction of the energy consumption in the preparation process, the assurance that also all is easy to get of the yield of product and quality.And the granularity of the granular Starso product for preparing with the inventive method is good, need not to go granulation when particularly using it for the production of non-phosphide detergent again and directly help reducing the production link and the save energy of this washing powder with addition of going in the back.
Below by specific embodiment foregoing of the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following example.
Be 35% at weight content, in the sodium silicate aqueous solution of modulus 3.0, after to be 96% sodium hydroxide with content with the modulus of silicon-dioxide in its solution and sodium oxide mole ratio be adjusted to 0.99-1.04, heating is at least 1 hour under 90 ℃ of-96 ℃ of temperature that are lower than the solution boiling point and conventional agitation condition, and to be concentrated into weight concentration be 50%-55%.This concentrated solution is delivered to the Countercurrent Spray Dryer or the corresponding apparatus of present routine, is the ejection of 2.0-2.5 millimeter nozzle with 80-90 kilogram/cm2 pressure through diameter, carries out countercurrent spray with the dedusting after filtration and the heated pure warm air that enter in the tower from bottom to top.The inlet temperature that is used for dried fabricate-heat air in the tower is 340 ℃-350 ℃, and temperature out is 80 ℃-90 ℃.This pure warm air can carry out heat exchange by the air after filtering and obtain in hotblast stove.After the low amounts of dust of being taken out of with upstream by dry cat head can be used multiclone collector, electrostatic precipitation chamber and the tertiary treatment of water curtain gas wash tower, qualified air can enter atmosphere, dust and reach certain density sodium metasilicate solution and return again and utilize.
Claims (2)
1. the preparation method of granular anhydrous sodium metasilicate, it is characterized in that with the water glass being raw material, to its determination of aqueous solution modulus and with sodium hydroxide its modulus is adjusted to 0.99-1.04, after heating under the temperature that is lower than the solution boiling point is concentrated into weight concentration and is 50%-55%, is the ejection of 2.0-2.5 millimeter nozzle with 80-90 kilogram/cm2 pressure through diameter, carry out countercurrent spray with warm air, dry inlet temperature with warm air is 340 ℃-350 ℃, and temperature out is 80 ℃-90 ℃.
2. the preparation method of granular anhydrous sodium metasilicate as claimed in claim 1, the warm air of using when it is characterized in that said countercurrent spray is heated pure warm air after the dedusting after filtration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00120596A CN1093839C (en) | 2000-11-21 | 2000-11-21 | Method for preparing granular anhydrous sodium metasilicate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00120596A CN1093839C (en) | 2000-11-21 | 2000-11-21 | Method for preparing granular anhydrous sodium metasilicate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1290653A true CN1290653A (en) | 2001-04-11 |
| CN1093839C CN1093839C (en) | 2002-11-06 |
Family
ID=4588274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00120596A Expired - Fee Related CN1093839C (en) | 2000-11-21 | 2000-11-21 | Method for preparing granular anhydrous sodium metasilicate |
Country Status (1)
| Country | Link |
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| CN (1) | CN1093839C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115091A (en) * | 2011-04-22 | 2011-07-06 | 冷水江三A化工有限责任公司 | Preparation method of anhydrous sodium silicate microparticle |
| CN102742511A (en) * | 2012-07-23 | 2012-10-24 | 青岛弗兰克精细化工有限公司 | Ultralow-density natural compound clumping cat litter and production process thereof |
| CN104436723A (en) * | 2014-12-02 | 2015-03-25 | 四川绵竹川润化工有限公司 | Integrated drying and pneumatic crushing process |
| CN112429744A (en) * | 2020-11-02 | 2021-03-02 | 山东联科科技股份有限公司 | Production method of anhydrous sodium metasilicate |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328370A (en) * | 1976-08-30 | 1978-03-16 | Toshiba Corp | Image conversion tube unit |
| CN1045760C (en) * | 1995-12-25 | 1999-10-20 | 夏纪华 | Raw stock and method for producing sodium metasilicate pentahydrate, anhydrous quick-dissolving sodium metasilicate 4A molecular sieve and potassium sulfate |
| CN1188741A (en) * | 1997-01-22 | 1998-07-29 | 李云飞 | Producing method for granular metasilicate pentahydrate sodium |
-
2000
- 2000-11-21 CN CN00120596A patent/CN1093839C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115091A (en) * | 2011-04-22 | 2011-07-06 | 冷水江三A化工有限责任公司 | Preparation method of anhydrous sodium silicate microparticle |
| CN102742511A (en) * | 2012-07-23 | 2012-10-24 | 青岛弗兰克精细化工有限公司 | Ultralow-density natural compound clumping cat litter and production process thereof |
| CN104436723A (en) * | 2014-12-02 | 2015-03-25 | 四川绵竹川润化工有限公司 | Integrated drying and pneumatic crushing process |
| CN104436723B (en) * | 2014-12-02 | 2016-05-04 | 四川绵竹川润化工有限公司 | A kind of dry gentle powder integral process |
| CN112429744A (en) * | 2020-11-02 | 2021-03-02 | 山东联科科技股份有限公司 | Production method of anhydrous sodium metasilicate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1093839C (en) | 2002-11-06 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20021106 |