CN101318663A - Method for preparing high-modulus sodium silicate - Google Patents
Method for preparing high-modulus sodium silicate Download PDFInfo
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- CN101318663A CN101318663A CNA2008101322774A CN200810132277A CN101318663A CN 101318663 A CN101318663 A CN 101318663A CN A2008101322774 A CNA2008101322774 A CN A2008101322774A CN 200810132277 A CN200810132277 A CN 200810132277A CN 101318663 A CN101318663 A CN 101318663A
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- sodium silicate
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- modulus sodium
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Abstract
The invention discloses a method for producing high-modulus sodium silicate at low temperature and normal pressure. The method comprises the following steps: the activated silicon dioxide from fly ash-typed industrial waste is leached by caustic lye of soda to produce low-modulus sodium silicate solution, the solution is decomposed by carbonation to prepare silicic acid (SiO2nH2O), then the silicic acid, the low-modulus sodium silicate and/or sodium hydroxide solution are mixed at the modulus index required by the final sodium silicate products and stirred to dissolve at temperature lower than liquid boiling point, therefore, the high-modulus sodium silicate is produced. Compared with the existing drying and wet methods for producing sodium silicate, the method of the invention has the advantages of wide raw material resources, low cost and energy consumption, no pollution; the method can be used for producing the sodium silicate with any modulus (M) from 1 to 4, in particular to the high-modulus sodium silicate, and has great industrialized generalization and application value.
Description
Technical field
The present invention relates to the comprehensive utilization and the inorganic salt of flyash class industrial waste--the preparation of-water glass, belong to a kind of technology for preparing high-modulus sodium silicate with flyash class industrial waste.
Background technology
Water glass often is known as water glass or bubble flower alkali, it is the extremely wide inorganic salt product of a kind of range of application, being mainly used in industries such as washing composition, soapmaking industry, packing business, precision casting, welding electrode production, coating, building materials and metallurgy, also is the basic raw material of producing silica gel, molecular sieve and white carbon black.One of characteristic index of sodium silicate solution is that modulus is the SiO in the sodium silicate solution
2And Na
2The mass ratio of O, the use occasion dominate of high-modulus sodium silicate solution at present.
The manufacture method of water glass generally is divided into two kinds of dry method and wet methods.Wherein dry method is with quartz sand and soda ash or sodium sulfate mixing, in 1400～1500 ℃ High Temperature Furnaces Heating Apparatus, carry out frit reaction in 6～7 hours, reactant needs to be cooled to glassy material in the molten state shrend, and then this material moved in the dissolving tank, the dissolving of feeding hot steam, vapor pressure is about 0.4MPa, the material that dissolving is good is let out long-time natural subsidence or filtration removal residue in the clarifying tank, clarifying supernatant liquor requires concentration to be the water glass product with being pumped into to be concentrated in the evaporation concentrator again, its advantage is to produce the water glass of various moduluses, as M is the high-modulus sodium silicate of 0.5-4.0, especially M＞2.5, and weak point is the energy consumption height, pollute heavy.Wet method is to be raw material with caustic alkali and silica powder, and under about 160 ℃, the condition of 0.6～0.8MPa pressure, stirring reaction was made in 6～8 hours in dissolution kettle.The same with dry method, evaporation concentration could obtain product after wet method also need be removed residue, and its advantage is to have avoided pyroreaction, but has the raw material consumption height, can only prepare the shortcoming of low modulus water glass.
In addition, no matter wet method or dry method all do not make full use of the such trade waste of flyash in the prior art and prepare high-modulus sodium silicate.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, provide a kind of and be rich in the trade waste of active silica as raw material with flyash class etc., the method of the various modulus water glass of preparation under low-temperature atmosphere-pressure, especially produce high-modulus sodium silicate, reach energy-saving and cost-reducing effect, demonstrate fully environmental friendliness.
The present invention relates to a kind of method of producing high-modulus sodium silicate under low-temperature atmosphere-pressure, it comprises the steps: to soak the molten more active SiO that contains with liquid caustic
2Flyash class trade waste, to prepare low modulus sodium silicate solution; After the liquid-solid separation, use desulfurization CO
2The flue gas carbonating is decomposed this solution, makes the water glass in the solution be transformed into silicic acid (SiO
2NH
2O) precipitation is separated out, and refilters separation, and filtrate is sodium carbonate solution, recycles after mending alkali or evaporation concentration again after the causticization; The gained filter cake is removed the Na of silicic acid absorption through simple washing
2CO
3After, dissolve with the above-mentioned low modulus sodium silicate solution that filters to isolate and/or liquid caustic chemical ingredients by the required modulus of final water glass product, under temperature, stir moltenly less than this solution boiling point, can synthesize high-modulus sodium silicate fast.
Preferably, described liquid caustic concentration is meant any liquid caustic of NaOH content 〉=5%.
Preferably, the described alkali condition of soaking be under the normal pressure less than the arbitrary temp of this solution boiling point, or under the high pressure greater than the arbitrary temp of this solution boiling point.
Preferably, describedly contain more active SiO
2Flyash class trade waste be the coal gangue of flyash, roasting, kaolin, nepheline and chemical industry and/or the metallurgical slag material of roasting.
Preferably, described CO
2Flue gas is the CO after desulfurization is handled
2The flue gas of content 〉=10%.
Preferably, described carbonating decomposition condition is meant low mould sodium silicate solution carbon branch Na to the solution
2SiO
3Almost all be converted into SiO
2NH
2The condition of O.
Preferably, mend alkali again after the described causticization or evaporation concentration is implemented like this, promptly, when soaking the low modulus sodium silicate solution of molten flyash class trade waste preparation with the lower concentration liquid caustic, sodium carbonate solution after carbon divides and filters removal silicic acid adopts direct causticization to mend alkali again and recycles to original concentration; And when soaking the low modulus sodium silicate solution of molten flyash class trade waste preparation with the high density liquid caustic, recirculation is used after carbon divides and filters the sodium carbonate solution that obtains, adopts direct causticization revaporization to be concentrated into original concentration.
Preferably, dissolve in the step the two chemical composition of strict assay determination at low modulus water glass of described usefulness and silicic acid.
Preferably, described synthetic temperature selects room temperature to the arbitrary temp between the solution boiling point, guarantees to be reflected under the normal pressure in this temperature range and carries out, and temperature is near boiling point, and synthesising reacting time was less than 25 minutes.
Preferably, described synthetic temperature selects to be higher than the temperature of solution boiling point.
The arbitrary combination of above-mentioned preferred feature can constitute a scheme of the present invention, and for example a concrete scheme comprises the steps:
(1) under temperature, is rich in SiO with the NaOH solution hot dipping flyash class of mass percent concentration 〉=5% less than the solution boiling point
2Raw material, to prepare the water glass liquid of low modulus, the liquid-solid ratio (weight ratio) of NaOH solution when alkali soaks and described raw material is 0.7～30: 1, temperature is 20～125 ℃, the time is 40 minutes-3 hours;
(2) use desulfurization CO
2The flue gas carbonating is decomposed the low modulus sodium silicate solution that solid-liquid separation goes out, and makes Na in the solution
2SiO
3Almost all change silicic acid (SiO into
2NH
2O), CO
2Flue gas concentration 〉=10%; The carbonating decomposition temperature is 55～95 ℃;
(3) silicic acid that obtains with 60～80 ℃ of above-mentioned solid-liquid separation of clear water countercurrent washing is removed the Na of absorption
2CO
3, measure the chemical ingredients, particularly water ratio of gained filter cake after, dissolve the preparation water glass with the sodium silicate solution and/or the pure liquid caustic of low modulus, synthesis temperature is≤the solution boiling point that synthesising reacting time is≤25 minutes; Also can adopt the temperature that is higher than the solution boiling point significantly shortening synthesising reacting time, as when being higher than about 10 ℃ of solution boiling temperature, can finish building-up reactions in 7-9 minute.
(4) chemical ingredients by the required modulus of final water glass product dissolves, and heat of stirring boils that promptly to prepare M be 1～4 various water glass;
(5) be that sodium carbonate solution behind the above-mentioned precipitated silicic acid is sent to causticization or inspissation and returned to the original caustic sodium concentration and soak operation to alkali and recycle with carbon mother liquid.
The method for preparing water glass of the present invention is characterised in that: material is for being rich in active SiO
2Raw material, SiO wherein
2Content answers 〉=35%; Active SiO
2Comprise amorphous SiO
2With unformed SiO
2Active SiO
2Under low-temperature atmosphere-pressure, can generate water glass with the caustic alkali reaction, and quartzy SiO
2React very slow.The described material that contains more activity not only shows under low-temperature atmosphere-pressure and reacts with caustic alkali, and at a certain temperature can spontaneous vigorous reaction, makes the feed liquid boiling.This class raw material comprises kaolin, opal, nepheline and the chemical industry of coal gangue, roasting of flyash, roasting and metallurgical slag etc., when material is thick, needs through crushing grinding to granularity≤200 orders.
The present invention is not limited to this concrete scheme, but comprises the arbitrary combination of each feature as mentioned above, because these all technical schemes that constitute are to implement very easily to those skilled in the art, so do not enumerate one by one here.
Adopt the method for any modulus water glass of preparation of the present invention, especially produce the method for high-modulus sodium silicate, raw materials used source is wide, price is low, has avoided highly energy-consuming high pollution operations such as use high-temperature fusion, shrend, and technological process is simple, the equipment less investment, can be used for the coal-burning power plant fully and develop a circular economy, increase production and improve productivity, this technological operation is easy, product cost is low, has bigger economic benefit and social benefit.
Embodiment
With following embodiment method of the present invention is further described, and not as the qualification of protection domain of the present invention.
Embodiment 1
Using 36% liquid caustic, is 4: 3 by liquid-solid ratio (weight ratio), contains SiO 120 ℃ of following normal pressure hot dippings
2Be 47% flyash 45 minutes, preparation M is 0.57 low modulus sodium silicate solution, SiO in its solution
2Content is 60g/L.Under 80 ℃ temperature, with the CO after the desulfurization
2Content is that 38% flue gas carbonating is decomposed this solution, preparation silicic acid (SiO
2NH
2O).Filtering separation, with the silicic acid filter cake with about 70 ℃ hot water countercurrent washing three times, survey its water ratio then, it by M 3.5～3.7 index, to hang down modulus water glass, caustic alkali and silicic acid dissolves, place still heat of stirring between 95～110 ℃ to boil 20 minutes the material that dissolves, promptly make M and be 3.5～3.7 water glass product.
With carbon divide yellow soda ash liquid that after-filtration goes out with milk of lime after 95～100 ℃ of causticizations, extremely return alkali behind the original caustic sodium concentration (36%) with vaporizer inspissation and soak operation and recycle.
Embodiment 2
With kaolin powder breakdown mill to 200 order, in 1050 ℃ of roastings 1 hour, the liquid caustic with 18% was 5: 1 by liquid-solid ratio (weight ratio), in the sodium silicate solution of 100 ℃ of hot dippings low modulus of solid-liquid separation preparation after 2 hours, SiO in its solution
2Content is 41g/L.Utilize technology described in the patent application 200716062197.1 that this solution is carried out the carbon branch twice then.One time carbon divides the impurity of removing in the solution such as iron, titanium and aluminium, and secondary carbon divides preparation purer silicic acid (SiO
2NH
2O).After the filtering separation, with 65 ℃ hot wash silicic acid for several times, after removing the yellow soda ash of silicic acid absorption, measure the silicic acid water ratio, it by M 3.1～3.5 index, to hang down modulus water glass, caustic alkali and silicic acid and dissolve, it is 3.1～3.5 water glass product that the material stirring heating between 95～100 ℃ that dissolves was promptly made M in 20 minutes.
The yellow soda ash liquid that filtering separation is obtained with lime causticization after, return alkali after the original concentration through the simple inspissation of vaporizer and soak operation and recycle.
Embodiment 3
With SiO
2Content in 1150 ℃ of calcinings 2 hours, is ground to 200 orders greater than 45% coal gangue fragmentation then, and the liquid caustic with 15% is 8: 1 by liquid-solid ratio (weight ratio), and in 105 ℃, hot dipping prepared the sodium silicate solution that hangs down modulus (M＜0.5) in 2 hours.Utilize technology described in the patent application 200716062197.1 that this solution is carried out the carbon branch twice then.A carbon divides impurity such as removing iron, titanium and aluminium, and secondary carbon branch is prepared purer silicic acid (SiO
2NH
2O).After the filtering separation, with 70 ℃ of yellow soda ash flush awaies that hot water is adsorbed with silicic acid.By M is 2.5～3.0 index, will hang down modulus water glass, caustic alkali and silicic acid and dissolve, and is stirred to silicic acid and dissolves fully under 110 ℃, in about 20 minutes of reaction times, promptly makes M and be 2.5～3.1 water glass.
The secondary carbon mother liquid that filtering separation obtains is a small amount of after with lime causticization to be mended caustic alkali and directly turns back to alkali after the original concentration and soak operation and recycle.
Claims (10)
1. method of producing high-modulus sodium silicate under low-temperature atmosphere-pressure, it comprises the steps: to soak the molten more active SiO that contains with liquid caustic
2Flyash class trade waste, to prepare low modulus sodium silicate solution; After the liquid-solid separation, use desulfurization CO
2The flue gas carbonating is decomposed this solution, makes the water glass in the solution be transformed into silicic acid (SiO
2NH
2O) precipitation is separated out, and refilters separation, and filtrate is sodium carbonate solution, recycles after mending alkali or evaporation concentration again after the causticization; The gained filter cake is removed the Na of silicic acid absorption through simple washing
2CO
3After, dissolve with the above-mentioned low modulus sodium silicate solution that filters to isolate and/or liquid caustic chemical ingredients by the required modulus of final water glass product, under temperature, stir moltenly less than this solution boiling point, can synthesize high-modulus sodium silicate fast.
2. the method for production high-modulus sodium silicate as claimed in claim 1 is characterized in that: described liquid caustic concentration is meant any liquid caustic of NaOH content 〉=5%.
3. produce the method for high-modulus sodium silicate according to claim 1, it is characterized in that: the described alkali condition of soaking be under the normal pressure less than the arbitrary temp of this solution boiling point, or under the high pressure greater than the arbitrary temp of this solution boiling point.
4. the method for production high-modulus sodium silicate as claimed in claim 1 is characterized in that: describedly contain more active SiO
2Flyash class trade waste be the coal gangue of flyash, roasting, kaolin, nepheline and chemical industry and/or the metallurgical slag material of roasting.
5. the method for production high-modulus sodium silicate as claimed in claim 1 is characterized in that: described CO
2Flue gas is the CO after desulfurization is handled
2The flue gas of content 〉=10%.
6. the method for production high-modulus sodium silicate as claimed in claim 1 is characterized in that: described carbonating decomposition condition will be for hanging down mould sodium silicate solution carbon branch Na to the solution
2SiO
3Almost all be converted into SiO
2NH
2The condition of O.
7. the method for production high-modulus sodium silicate as claimed in claim 1, it is characterized in that: mend alkali again after the described causticization or evaporation concentration is implemented like this, promptly, when soaking the low modulus sodium silicate solution of molten flyash class trade waste preparation with the lower concentration liquid caustic, sodium carbonate solution after carbon divides and filters removal silicic acid adopts direct causticization to mend alkali again and recycles to original concentration; And when soaking the low modulus sodium silicate solution of molten flyash class trade waste preparation with the high density liquid caustic, recirculation is used after carbon divides and filters the sodium carbonate solution that obtains, adopts direct causticization revaporization to be concentrated into original concentration.
8. the method for production high-modulus sodium silicate as claimed in claim 1 is characterized in that: dissolve in the step the two chemical composition of strict assay determination at low modulus water glass of described usefulness and silicic acid.
9. the method for production high-modulus sodium silicate as claimed in claim 1, it is characterized in that: described synthetic temperature selects room temperature to the arbitrary temp between the solution boiling point, guarantee to be reflected under the normal pressure in this temperature range and carry out, temperature is near boiling point, and synthesising reacting time was less than 25 minutes.
10. the method for production high-modulus sodium silicate as claimed in claim 1 is characterized in that: described synthetic temperature selects to be higher than the temperature of solution boiling point.
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| CNA2008101322774A CN101318663A (en) | 2008-07-23 | 2008-07-23 | Method for preparing high-modulus sodium silicate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101322774A CN101318663A (en) | 2008-07-23 | 2008-07-23 | Method for preparing high-modulus sodium silicate |
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| CN101786635A (en) * | 2010-03-17 | 2010-07-28 | 朔州市润泽投资发展有限公司 | Method for preparation of sodium metasilicate pentahydrate by fly ash |
| CN101993087A (en) * | 2010-11-29 | 2011-03-30 | 中煤平朔煤业有限责任公司 | Method for preparing water glass by using fly ash |
| CN101993085A (en) * | 2010-11-29 | 2011-03-30 | 中煤平朔煤业有限责任公司 | Method for producing white carbon black for toothpaste from fly ash |
| CN102092734A (en) * | 2010-11-29 | 2011-06-15 | 中煤平朔煤业有限责任公司 | Method for preparing sodium silicate solution and mullite refractory material with fly ash |
| CN102225770A (en) * | 2011-03-23 | 2011-10-26 | 张振慧 | Wet preparation method of special water glass for petrochemical catalyst |
| CN102344148A (en) * | 2011-07-26 | 2012-02-08 | 昆明理工大学 | Method for producing water class with high mole ratio by coal gangue acid-leaching residue |
| CN102659128A (en) * | 2012-04-19 | 2012-09-12 | 张学政 | Method for preparing sodium silicate by using ordinary-pressure wet method |
| CN103506213A (en) * | 2013-08-29 | 2014-01-15 | 紫金矿业集团股份有限公司 | Method for preparing liquid sodium silicate through copper and sulfide tailings |
| CN103553069A (en) * | 2013-11-05 | 2014-02-05 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Preparation method of sub-micron 4A zeolite |
| CN103787347A (en) * | 2012-11-02 | 2014-05-14 | 岳阳恒忠新材料有限公司 | Process for producing liquid high-modulus water glass by combination of dry method and wet method |
| CN104556080A (en) * | 2015-01-15 | 2015-04-29 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Method for preparing sodium silicate by virtue of desilication alkaline liquor |
| CN105084377A (en) * | 2015-08-24 | 2015-11-25 | 昌邑市龙港无机硅有限公司 | Continuous crystallization process for sodium metasilicate pentahydrate |
| CN105152179A (en) * | 2015-09-10 | 2015-12-16 | 安徽龙泉硅材料有限公司 | Method for utilizing waste heat in wet process production of sodium metasilicate for quick-setting cement |
| CN105905914A (en) * | 2016-04-18 | 2016-08-31 | 苏州吉人高新材料股份有限公司 | Preparation method of ultrahigh modulus silicate |
| CN108117085A (en) * | 2018-03-21 | 2018-06-05 | 新乡市星汉化工有限公司 | Wet production potassium-sodium water glass |
| CN109336123A (en) * | 2018-11-22 | 2019-02-15 | 山西大学 | A method of using coal ash for manufacturing for soluble glass of high modulus |
| CN110231434A (en) * | 2019-06-26 | 2019-09-13 | 洛阳市奇航化工有限公司 | A kind of accurate control method of industry quick dissolved sodium silicate modulus |
| CN110272053A (en) * | 2018-03-16 | 2019-09-24 | 国家能源投资集团有限责任公司 | The preparation method of high-purity waterglass, low iron white carbon black and ultra-clear glasses raw material |
| CN113943004A (en) * | 2021-10-19 | 2022-01-18 | 北京润捷浩达科技有限公司 | Method for comprehensively recycling copper-nickel sulfide ore smelting slag |
| CN114408935A (en) * | 2022-01-30 | 2022-04-29 | 淄博电子化学试剂科技有限公司 | Preparation method of high-modulus lithium silicate aqueous solution |
| CN115215418A (en) * | 2022-07-27 | 2022-10-21 | 聊城鲁西聚酰胺新材料科技有限公司 | Method for removing silicate in ammoximation wastewater by using CO2 |
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| CN101786635A (en) * | 2010-03-17 | 2010-07-28 | 朔州市润泽投资发展有限公司 | Method for preparation of sodium metasilicate pentahydrate by fly ash |
| CN101993085B (en) * | 2010-11-29 | 2012-10-03 | 中煤平朔煤业有限责任公司 | Method for producing white carbon black for toothpaste from fly ash |
| CN101993087A (en) * | 2010-11-29 | 2011-03-30 | 中煤平朔煤业有限责任公司 | Method for preparing water glass by using fly ash |
| CN101993085A (en) * | 2010-11-29 | 2011-03-30 | 中煤平朔煤业有限责任公司 | Method for producing white carbon black for toothpaste from fly ash |
| CN102092734A (en) * | 2010-11-29 | 2011-06-15 | 中煤平朔煤业有限责任公司 | Method for preparing sodium silicate solution and mullite refractory material with fly ash |
| CN102225770B (en) * | 2011-03-23 | 2015-08-19 | 张振慧 | The method of wet method Effect of Catalysis In Petrochemistry agent dedicated water glass |
| CN102225770A (en) * | 2011-03-23 | 2011-10-26 | 张振慧 | Wet preparation method of special water glass for petrochemical catalyst |
| CN102344148A (en) * | 2011-07-26 | 2012-02-08 | 昆明理工大学 | Method for producing water class with high mole ratio by coal gangue acid-leaching residue |
| CN102344148B (en) * | 2011-07-26 | 2014-07-30 | 昆明理工大学 | Method for producing water class with high mole ratio by coal gangue acid-leaching residue |
| CN102659128A (en) * | 2012-04-19 | 2012-09-12 | 张学政 | Method for preparing sodium silicate by using ordinary-pressure wet method |
| CN103787347A (en) * | 2012-11-02 | 2014-05-14 | 岳阳恒忠新材料有限公司 | Process for producing liquid high-modulus water glass by combination of dry method and wet method |
| CN103506213A (en) * | 2013-08-29 | 2014-01-15 | 紫金矿业集团股份有限公司 | Method for preparing liquid sodium silicate through copper and sulfide tailings |
| CN103506213B (en) * | 2013-08-29 | 2015-06-17 | 紫金矿业集团股份有限公司 | Method for preparing liquid sodium silicate through copper and sulfide tailings |
| CN103553069A (en) * | 2013-11-05 | 2014-02-05 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Preparation method of sub-micron 4A zeolite |
| CN103553069B (en) * | 2013-11-05 | 2016-01-20 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | A kind of preparation method of submicron 4A-zeolite |
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| CN105084377B (en) * | 2015-08-24 | 2019-10-01 | 昌邑市龙港无机硅有限公司 | A kind of metasilicate pentahydrate sodium continuous crystallisation technique |
| CN105084377A (en) * | 2015-08-24 | 2015-11-25 | 昌邑市龙港无机硅有限公司 | Continuous crystallization process for sodium metasilicate pentahydrate |
| CN105152179A (en) * | 2015-09-10 | 2015-12-16 | 安徽龙泉硅材料有限公司 | Method for utilizing waste heat in wet process production of sodium metasilicate for quick-setting cement |
| CN105905914A (en) * | 2016-04-18 | 2016-08-31 | 苏州吉人高新材料股份有限公司 | Preparation method of ultrahigh modulus silicate |
| CN110272053A (en) * | 2018-03-16 | 2019-09-24 | 国家能源投资集团有限责任公司 | The preparation method of high-purity waterglass, low iron white carbon black and ultra-clear glasses raw material |
| CN110272053B (en) * | 2018-03-16 | 2021-05-11 | 国家能源投资集团有限责任公司 | Preparation method of high-purity water glass, low-iron white carbon black and ultra-white glass raw materials |
| CN108117085A (en) * | 2018-03-21 | 2018-06-05 | 新乡市星汉化工有限公司 | Wet production potassium-sodium water glass |
| CN109336123A (en) * | 2018-11-22 | 2019-02-15 | 山西大学 | A method of using coal ash for manufacturing for soluble glass of high modulus |
| CN110231434A (en) * | 2019-06-26 | 2019-09-13 | 洛阳市奇航化工有限公司 | A kind of accurate control method of industry quick dissolved sodium silicate modulus |
| CN113943004A (en) * | 2021-10-19 | 2022-01-18 | 北京润捷浩达科技有限公司 | Method for comprehensively recycling copper-nickel sulfide ore smelting slag |
| CN114408935A (en) * | 2022-01-30 | 2022-04-29 | 淄博电子化学试剂科技有限公司 | Preparation method of high-modulus lithium silicate aqueous solution |
| CN114408935B (en) * | 2022-01-30 | 2023-09-19 | 淄博电子化学试剂科技有限公司 | Preparation method of high-modulus lithium silicate aqueous solution |
| CN115215418A (en) * | 2022-07-27 | 2022-10-21 | 聊城鲁西聚酰胺新材料科技有限公司 | Method for removing silicate in ammoximation wastewater by using CO2 |
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