CN102092735B - Purification method of sodium silicate - Google Patents
Purification method of sodium silicate Download PDFInfo
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- CN102092735B CN102092735B CN 201110058754 CN201110058754A CN102092735B CN 102092735 B CN102092735 B CN 102092735B CN 201110058754 CN201110058754 CN 201110058754 CN 201110058754 A CN201110058754 A CN 201110058754A CN 102092735 B CN102092735 B CN 102092735B
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- sodium silicate
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Abstract
The invention provides a purification method of sodium silicate. The method comprises the following steps: sending sodium silicate liquid to a plate-and-frame filter press to remove coarse particle impurities and obtain the coarsely separated sodium silicate liquid; filling the coarsely separated sodium silicate liquid in a macroporous adsorption resin column, sending the obtained solution to an anion exchange column and a cation exchange column to remove ion impurities and obtain the high purity sodium silicate liquid, wherein the solution firstly flows through the anion exchange column and secondly flows through the cation exchange column in series. The operation method of the invention is simple and has high efficiency; and the obtained sodium silicate liquid has higher transparency and purity, thus creating a necessary condition for the production of high-quality and high-grade white carbon black.
Description
Technical field
The invention provides a kind of purification process of water glass.
Background technology
Water glass, popular name water glass, trade(brand)name sodium silicate.Water glass is a kind of important Inorganic Chemicals, except being used as washing composition and Binder Composition, still make the important source material of the fine chemical products such as silica gel, molecular sieve, silicon sol, white carbon black, its purposes is very extensive, important role in national economy.
Pure water glass outward appearance is colourless viscous liquid, contains Fe
2O
3, Al
2O
3, then can be with grey, green even black during the impurity such as CaO, MgO.Also contain in addition impurity salt, NaCl, Na in the water glass
2SO
4, Na
2CO
3Deng.Above-mentioned water glass impurity has obvious detrimentally affect to the density of water glass, viscosity, setting rate, cohesive strength, aging speed, surface tension, transparence etc.
Generally speaking, mainly be to remove insoluble impurities in the liquid by physical method in the filtration of Inorganic Silicon Compound industry liquid sodium silicate, obtain the sodium silicate solution of transparent clarification.
Domesticly filter enforcements that begins one's study very early for water glass, defecation method mainly is employing gravity natural sedimentation, centrifugal and vacuum filtration method.
The gravity natural sedimentation is that many producers mainly are to rely on the effect of natural gravity to make the impurity (water-insoluble) in the solution deposit to the bottom with slurry tank (or settling tank) with regard to widely used a kind of traditional defecation method a long time ago.When the modulus of liquid sodium silicate and concentration were higher, the settling time was very long, and when ambient temperature was low, the viscosity of solution was very large, sometimes even at all can't thoroughly clarify, and the separating effect of this method is relatively poor.
Centrifugal is take settling centrifuge as main equipment, utilizes the density difference of liquid sodium silicate and water-insoluble, carries out solid-liquid separation under the effect of centrifugal force.This method can obtain the higher liquid product of clarity.Yet " alkali mud " liquid content that forms after the centrifugal settling is higher, need add again sedimentation after the water treatment, just can discharge after the mud alkalinity reaches standard, and process is complicated.The separating effect of this separation method not only depends on size and the proportion of water-insoluble particle, also depends on its relative position in centrifuge drum.Simultaneously, separating effect is affected by temperature also, because this method service temperature is generally at 65-75 ℃, rapid heat dissipation when temperature is low affects separating effect.Therefore, this method generally is difficult to less particle is thoroughly removed.
The vacuum filtration method is to utilize the impellent of the pressure difference generation of filtration medium both sides to make solution pass through filtration medium, and impurity is stayed filtration medium surface or inner.This filter method loss of liquid is larger, the sodium silicate liquid larger to proportion (high density), and filtration efficiency is lower, can't realize industrialization.Be to be diluted to low concentration feed liquid after the sodium silicate solid dissolving during general employing vacuum filtration method, reduce viscosity and the proportion of feed liquid, filtering rate obviously improves; But to the high density kind, filtrate also will could get through concentrated, and this has not only prolonged operational path, has increased energy expenditure, and dilution and concentration process can be served disadvantageous effect to product tape.
Summary of the invention
The invention provides a kind of purification process of water glass.Adopt this technique can obtain high purity liquid water glass, working method is simple, for production high quality white carbon black products provides condition.
To achieve these goals, the technical scheme taked of the present invention is as follows:
Liquid soluble glass is removed coarse particles impurity through plate-and-frame filter press, obtains the liquid soluble glass of roughing out; The liquid soluble glass of roughing out is passed through first macroporous adsorptive resins, and the solution of outflow by the yin, yang ion exchange column, is removed foreign ion again, obtains high purity liquid water glass; Describedly refer to first anion-exchange column by the yin, yang ion exchange column, rear series connection flows into cationic exchange coloum.
Described is that the solution that adsorption resin column flows out is passed through anion-exchange column with the flow velocity forward inflow of 15～25m/h by the yin, yang ion exchange column, and the solution that flows out from anion-exchange column flows directly into cationic exchange coloum.
The macroporous resin that described macroporous adsorptive resins adopts comprises D101, AB-8, D101-1, DA201, DM-130, D1400, H103, CAD-40, DM11, D4020 or X-5.
Described cationic exchange coloum adopts strong acidic ion resin 001 * 7 type.
Described anion-exchange column is acidulous anion resin D110.
Remarkable advantage of the present invention:
Method of the present invention can effectively be removed the suspended impurity in the liquid soluble glass, improves purity and the transparency of liquid soluble glass, is one of essential condition of producing senior white carbon black.Utilizing adsorption resin column that the adsorption function of suspended impurity is removed impurity in the liquid soluble glass, reach the purpose of purification of liquid water glass, is that the senior white carbon black of production high-quality is created prerequisite.
The purification process of a kind of water glass of the present invention adopts resin absorption purified water glass, and by the further deionizing impurity of yin, yang ion exchange column, working method is simple again, and efficient is high, and the liquid soluble glass transparency, the purity that obtain are higher.
Embodiment
Liquid soluble glass is removed coarse particles impurity through plate-and-frame filter press, the liquid soluble glass of the roughing out that obtains, and transparency is 50 ~ 60ml approximately.The liquid soluble glass of roughing out is passed through first adsorption resin column, and wherein trickle suspended substance is by resin absorption, and liquid transparency can reach more than the 200ml.By the yin, yang ion exchange column, remove foreign ion again, obtain high purity liquid water glass.
Below be specific embodiments of the invention, further describe the present invention, but the present invention be not limited only to this.
Embodiment 1
Liquid soluble glass is removed coarse particles impurity through plate-and-frame filter press, obtains the liquid soluble glass of roughing out; The liquid soluble glass of roughing out is passed through first macroporous adsorptive resins, and the solution of outflow passes through the yin, yang ion exchange column with the flow velocity forward of 20m/h, removes foreign ion, obtains high purity liquid water glass; Wherein macroporous adsorbent resin adopts DA201, and anion and cation exchange resin is respectively 001 * 7 type styrene type cation exchange resin and D110 type acrylic acid type anion exchange resin.
The high purity liquid water glass that obtains after testing, the key technical indexes is as follows:
Fe≤30PPM, Ca≤2PPM, Cu≤2PPM, Mg≤3PPM, other heavy metal basically eliminate.
Embodiment 2
Liquid soluble glass is removed coarse particles impurity through plate-and-frame filter press, obtains the liquid soluble glass of roughing out; The liquid soluble glass of roughing out is passed through first macroporous adsorptive resins, and the solution of outflow passes through the yin, yang ion exchange column with the flow velocity forward of 25m/h, removes foreign ion, obtains high purity liquid water glass; Wherein macroporous adsorbent resin adopts D101, and anion and cation exchange resin is respectively 001 * 7 type styrene type cation exchange resin and D110 type acrylic acid type anion exchange resin.
Claims (2)
1. the purification process of a water glass, it is characterized in that: the step of described method is: liquid soluble glass is removed coarse particles impurity through plate-and-frame filter press, obtains the liquid soluble glass of roughing out; The liquid soluble glass of roughing out is passed through first macroporous adsorptive resins, and the solution of outflow by the yin, yang ion exchange column, is removed foreign ion again, obtains high purity liquid water glass; Describedly refer to first anion-exchange column by the yin, yang ion exchange column, rear series connection flows into cationic exchange coloum; Described cationic exchange coloum adopts strong acidic ion resin 001 * 7 type; Described anion-exchange column is acidulous anion resin D110; Described is that the solution that adsorption resin column flows out is passed through anion-exchange column with the flow velocity forward inflow of 15～25m/h by the yin, yang ion exchange column, and the solution that flows out from anion-exchange column flows directly into cationic exchange coloum.
2. the purification process of water glass according to claim 1 is characterized in that: the macroporous resin that described macroporous adsorptive resins adopts comprises D101, AB-8, D101-1, DA201, DM-130, D1400, H103, CAD-40, DM11, D4020 or X-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110058754 CN102092735B (en) | 2011-03-11 | 2011-03-11 | Purification method of sodium silicate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110058754 CN102092735B (en) | 2011-03-11 | 2011-03-11 | Purification method of sodium silicate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102092735A CN102092735A (en) | 2011-06-15 |
| CN102092735B true CN102092735B (en) | 2013-01-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110058754 Expired - Fee Related CN102092735B (en) | 2011-03-11 | 2011-03-11 | Purification method of sodium silicate |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI584867B (en) * | 2011-09-05 | 2017-06-01 | 日產化學工業股份有限公司 | Purified alkali silicate aqueous solution and production method of silica sol |
| CN104058412B (en) * | 2014-07-10 | 2016-08-24 | 福建远翔新材料股份有限公司 | A kind of production method of high yellowing-resistant white carbon |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6063344A (en) * | 1999-06-01 | 2000-05-16 | Occidental Chemical Corporation | Removing anions from alkaline silicate solutions |
| CN101462728A (en) * | 2008-12-30 | 2009-06-24 | 中国科学院上海微系统与信息技术研究所 | Method for preparing waterglass |
| CN101746980A (en) * | 2008-11-28 | 2010-06-23 | 沈阳临德陶瓷研发有限公司 | Method for preparing high-performance light-weight insulating brick by using quartz mine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3691047B1 (en) * | 2004-07-30 | 2005-08-31 | 日本化学工業株式会社 | Method for producing high purity active silicic acid aqueous solution |
-
2011
- 2011-03-11 CN CN 201110058754 patent/CN102092735B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6063344A (en) * | 1999-06-01 | 2000-05-16 | Occidental Chemical Corporation | Removing anions from alkaline silicate solutions |
| CN101746980A (en) * | 2008-11-28 | 2010-06-23 | 沈阳临德陶瓷研发有限公司 | Method for preparing high-performance light-weight insulating brick by using quartz mine |
| CN101462728A (en) * | 2008-12-30 | 2009-06-24 | 中国科学院上海微系统与信息技术研究所 | Method for preparing waterglass |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-36612A 2006.02.09 |
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| CN102092735A (en) | 2011-06-15 |
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Granted publication date: 20130116 Termination date: 20140311 |