CN1978320A - Direct production method of powdery sodium or potassium silicate - Google Patents
Direct production method of powdery sodium or potassium silicate Download PDFInfo
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- CN1978320A CN1978320A CN 200510129362 CN200510129362A CN1978320A CN 1978320 A CN1978320 A CN 1978320A CN 200510129362 CN200510129362 CN 200510129362 CN 200510129362 A CN200510129362 A CN 200510129362A CN 1978320 A CN1978320 A CN 1978320A
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Abstract
This invention relates to a direct production method for powder Na or K silicate including that high reactive plant ash or grinded micro quartz sand and NaOH, KOH or their mixture react in a melt tank to produce powder Na and K silicate to reduce energy cost in production.
Description
Technical field
The present invention relates to the direct production method of the silicate of a kind of powdery sodium or potassium.
Background technology
Water glass have another name called bubble flower alkali, water glass (Na2O.MSiO2, commonly used have a M=0.5,1,1-3.5), colourless, dark green or brown solid or thick liquid.Present production method mainly contains two kinds of dry method and wet methods:
A) dry method gets with soda ash (or sodium sulfate adds coal dust) and quartz sand frit reaction at high temperature, and this method is divided sodium carbonate method and sodium sulphate method again, can make the water glass of various moduluses, and packing is solid bubble flower alkali after the shrend.Solid bubble flower alkali helps transportation, stores.Solid bubble flower alkali is dissolved into liquid with it be fluid bubble flower alkali under certain temperature, pressure.
B) wet method is heated pressurization with liquid caustic soda and quartz sand and is got in reactor.This method is difficult to make the product of high-module, more competently can adopt this method at caustic soda.
The purposes of bubble flower alkali is very extensive, almost spreads all over each department of national economy.Being used to make various silicates products such as silica gel, white carbon black, zeolite molecular sieve, Starso, silicon sol, layer silicon and instant powdery bubble flower alkali, sodium-potassium silicate at chemical system, is the basic raw material of silicon compound; Being indispensable raw material in the washing composition such as washing powder, soap in light industry, also is water softener, settling agent; In textile industry, be used to help dye, bleaching and sizing; In mechanical industry, be widely used in casting, emery wheel manufacturing and anticolodal etc.; In building trade, be used to make rapid hardening cement, acid-proof cement dubbin, soil-solidified-agent, refractory materials etc.; Agriculturally can make the silicon element fertilizer material; Bubble flower alkali is widely used in the tackiness agent of paperboard carton as tackiness agent in addition.
Powdery sodium silicate claims anhydrous sodium metasilicate, powdery bubble flower alkali again.This product is unformed white powder, and is tasteless nontoxic, and rapidly dissolvable is insoluble to ethanol under the normal temperature and pressure in water, can absorb airborne moisture content and carbonic acid gas generation deliquescence.Powdery sodium silicate has winter hardiness, homogeneity, is convenient to store and transportation, can directly mix with other pulvis material.Its characteristics are water-soluble thing, the solid content height.Therefore can be widely used in industrial chemicals, washing powder assistant (especially concentrated detergent powder auxiliary agent the best), metal cleaner, fire bond, cement pavement curing agent, cement additire, cement stabilizing agent etc.Powdery sodium silicate can be used for liquid sodium silicate institute can applicable scope, and its present production method is to be raw material with industrial caustic soda and industry bubble flower alkali, obtains powder-like product through mode transfer reaction, hot-air dry, cooling, pulverizing.
Sodium orthosilicate (modulus M=0.5) main application is: alternative trimerization slander acid sodium, monosodium phosphate etc. can be used for making no phosphorus product: washing powder, metal degreasing agent, food clean-out system, weaving grease-removing agent, the without phosphorus clean-out system in oil field.Laminated crystal of sodium disilicate producer chemical field owned by France is a kind of no phosphorus powder washing assistant.Sodium-potassium silicate is mainly used in the welding electrode manufacturing and makes tackiness agent, has good plasticity-, and oven dry is fast, is difficult for the moisture absorption, arc stability during welding, and it is few to splash.
The powdery sodium silicate of existing various moduluses, the production of potassium silicate or sodium-potassium silicate all needs to dissolve concentration and evaporation through liquid indirectly, and spraying, high temperature air drying process are as Japanese Patent 03-164422 and U.S. Pat 5, disclosed technology in 229,095.Therefore, increased the energy consumption in producing, and the technological process of production is also complicated.
Summary of the invention
The objective of the invention is to have the plant ash of high reaction activity or the fine quartz sand that grinds or other material (as siliceous wilkinite etc.) and sodium hydroxide or potassium hydroxide by employing, or their mixture reacts direct production manufacturing powdery sodium, potassium silicate in the molten bath, to reach the energy consumption that reduces in the production process, simplify the purpose of production technique.When adopting high reaction temperature, can also reach the purpose that the silicate powder that will be generated is converted into solid block silicate.Compare with aforementioned dry method or wet production water glass (potassium), it is low that method of the present invention also has energy consumption, advantage of simple technology, and especially in the epoch that energy prices rise steadily, method of the present invention has more advantage cheaply.
The raw-material advantage of biomass is not only can provide heat energy, number be 2004100948918 combustion technologies that provided as Chinese patent application, and ashes that its burning back forms contain Powdered and unformed and have white rouge than high reaction activity, therefore, under lower temperature of reaction, with the oxyhydroxide melt of sodium or potassium vigorous reaction can take place and generate corresponding silicate powder.When suitably low temperature (as less than 800 ℃),, therefore, can more easily directly obtain the loose block that tiny silicate granules is formed because the steam that forms in the reaction has the efflorescence crushing effect to the silicate that is generated.The another one advantage is that it contains residue carbon, under anaerobic environment, as adopt when reflecting smelting furnace, by carbon and oxygen or product water and carbon reaction generate carbon monoxide, thereby reduce the generation of carbonic acid gas, and carbonic acid gas can generate high temperature with the reaction of sodium hydroxide or potassium hydroxide the time could with the carbonate of silicon oxide reaction, thereby reduced the loss of caustic alkali when reacting with material with sodium hydroxide or potassium hydroxide.
The biological material combustion residue contains silicon oxide mostly, but higher with straw, rice husk content especially, wheat straw also contains a large amount of silicon oxide, and therefore, preferred biological material is straw, rice husk and wheat straw, and other material can certainly use.The method of the silicon oxide of technology in utilizing biological material formerly, as Chinese patent CN98113837.3, CN90106479.3, the disclosed technology of CN88105429.1, all be by wet method, be about to rice hull ash and sodium hydroxide solution and in the reactor of High Temperature High Pressure, carry out reaction solution body silicate.
Embodiment for example
Embodiment 1
Dry rice straw is stacked the plant ash that spontaneous firing becomes black, or take from the plant ash of the various biomass after stove and accessory burning, get plant ash 1Kg (containing silicon-dioxide 600g approximately) at every turn, respectively with 1200,600,300,200,150g sheet or particulate state sodium hydroxide (or potassium or their mixture) evenly mix puts into the reaction molten bath.Sodium hydroxide or potassium also can earlier water-solublely mix with plant ash again, under electric furnace or the condition with coal, oil, Sweet natural gas or biomass combustion stove heating molten bath, with said mixture difference reacting by heating.When temperature during greater than 320 ℃, solid sodium hydroxide (or potassium) begins to be fused into colourless fluxion and contains the solid matter of powdery sodium silicate (or potassium) with the react loose bulk that generates white of unformed silicon oxide in the plant ash, continue to heat up, reaction product can be changed into dark green; When temperature of reaction during greater than 600 ℃, the water glass of generation (or potassium) obviously tubercle becomes block; When temperature of reaction reached 800 ℃, reaction product was the semi-melting state, and when above, reaction product is the melt liquid state, i.e. glassy solids silicate when temperature of reaction reaches 1100 ℃.About 20 minutes of the deadline of reaction, the increase reaction times makes reaction more abundant.Under the electric furnace heating state; because reactant is exposed in the air, the oxidized minimizing of residue carbon in the plant ash, and under the condition with coal, oil, Sweet natural gas or the heating of biomass combustion reverberatory furnace; because the protection of anoxybiotic flue gas is arranged, the residue carbon major part in the plant ash still obtains keeping.Products therefrom is put into cold water, promptly as seen begin dissolving within the several seconds.According to the difference of batching, the modulus of final water glass (or potassium) product promptly contains the ratio of SiO2 and Na2O, and above-mentioned batching can make modulus change between 0.5 to 4; And the silicate of high-module need easier formation under comparatively high temps.
Silicate, residue carbon that reaction product mainly contains sodium or potassium reach from the formed salt of the metallic impurity in the plant ash.Because residue carbon has effects such as absorption, products therefrom also can be directly uses as the additive of industrial detergent.
Above-mentioned product promptly obtains the silicate powder of all size granular size through grinding to sieve again.
According to the technology formerly of patent CN1597513, in the time of can confirming near Heating temperature is 800 ℃, main is the generation of crystalline sodium disilicate.
Embodiment 2
Other step such as embodiment 1 reduce in order to make the impurity in the reaction product as far as possible, plant ash are removed irony with magnet and again with hydrochloric acid or the sulphuric acid soln cleaning and filtering of clear water or 0.5M.
Embodiment 3
Prepared liquid soluble glass of dissolving and powder carbon mixture obtain water glass and powder carbon after the filtering separation in water, and powder carbon can be used as the raw material of gac.
Embodiment 4
Other step such as embodiment 1 and/or 2, in order to utilize the heat energy of residue carbon in the plant ash, after the oxyhydroxide of sodium or potassium is converted into sodium or sylvite fully, oxygen or air are fed in the molten bath by pipeline, preferably directly feed reaction product inside, make the heat release of residue carbon generation oxidizing reaction; Perhaps in order to remove the residue carbon in the reaction product, stopping to heat molten bath or molten bath when being in the condition of high temperature, oxygen or air are fed in the molten bath by pipeline, preferably directly feed reaction product inside, make residue carbon generation oxidizing reaction; Perhaps, the final reaction product is sent in the electric furnace, under air atmosphere or logical oxygen atmosphere, be heated to 700 ℃ and remove remaining carbon further., the cooling fragmentation obtains silicate powder after sieving.
Embodiment 5
Other step such as embodiment 1 do not contact with the caustic alkali material in order to protect bath wall, can lay plant ash or quartz sand or pure carbon material as the molten bath wall, and this wall thickness is generally at 10 centimetres.Corroded by hydroxides for fear of the furnace wall, furnace wall temperature can be controlled at the melting temperature that is lower than sodium hydroxide or potassium hydroxide and water glass, therefore, can in the plant ash of being laid or quartz sand or pure carbon material, solidify automatically during the nearly furnace wall of liquid reactants or reacting product stream and can not corrode real furnace wall.Further, directly contact for making in reaction mixture and the roasting kiln flue gas or air, plant ash or pure carbon material are laid in the reactant top.
Embodiment 6
Other step such as embodiment 1 become fine quartz sand with plant ash.According to the granular size difference of quartz sand, the asynchronism(-nization) of complete reaction.With 100 order quartz sands is example, and in the time of 600 ℃, the complete reaction time is about 30 minutes.When reaction was incomplete, reaction product can be used as a kind of quartz/silicate composite material and uses.
Claims (10)
1. the direct production method of the silicate of powdery sodium or potassium is characterized in that: the oxyhydroxide of sodium or potassium or their mixture and powdery silicon oxide-containing material are blended in the molten bath heat.
2. the direct production method of the silicate of powdery sodium according to claim 1 or potassium is characterized in that: the oxyhydroxide of described sodium or potassium is the block or liquid, aqueous shape of powdery.
3. the direct production method of the silicate of powdery sodium according to claim 1 or potassium is characterized in that: described powdery material is the residue after straw kind or particulate species or fluid biolobic material material or their mixture burns.
4. the direct production method of the silicate of powdery sodium according to claim 1 or potassium is characterized in that: the quartz sand of described powdery material for pulverizing.
5. the direct production method of the silicate of powdery sodium according to claim 3 or potassium is characterized in that: the residue after described straw kind or particulate species or fluid biolobic material material or their mixture burns is straw or rice husk or wheat straw stalk.
6. the direct production method of the silicate of powdery sodium according to claim 1 or potassium is characterized in that: described Heating temperature is greater than 320 ℃ but less than 600 ℃.
7. the direct production method of the silicate of powdery sodium according to claim 1 or potassium is characterized in that: described Heating temperature makes described silicate powder be converted into semi-melting bulk or crystalline silicate greater than 600 ℃ but less than 800 ℃.
8. the direct production method of the silicate of powdery sodium according to claim 1 or potassium is characterized in that: described Heating temperature makes described silicate powder be converted into crystalline silicate or bulk silicon hydrochlorate greater than 800 ℃ but less than 1100 ℃.
9. the direct production method of the silicate of powdery sodium according to claim 1 or potassium is characterized in that: described Heating temperature makes described silicate powder be converted into glassy solids silicate greater than 1100 ℃.
10. the direct production method of the silicate of powdery sodium according to claim 1 or potassium, it is characterized in that: after the complete conversion reaction of the oxyhydroxide of sodium or potassium is finished, in the molten bath or inner aerating oxygen of reaction mixture or air, the residue combustiblesubstance molten bath in is burnt remove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510129362 CN1978320A (en) | 2005-12-06 | 2005-12-06 | Direct production method of powdery sodium or potassium silicate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510129362 CN1978320A (en) | 2005-12-06 | 2005-12-06 | Direct production method of powdery sodium or potassium silicate |
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| CN1978320A true CN1978320A (en) | 2007-06-13 |
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| CN 200510129362 Pending CN1978320A (en) | 2005-12-06 | 2005-12-06 | Direct production method of powdery sodium or potassium silicate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798095A (en) * | 2010-03-10 | 2010-08-11 | 昊青薪材（北京）技术有限公司 | Process for preparing sodium potassium silicate solution by predesiliconizing potassium-rich rock |
| CN113753906A (en) * | 2021-09-16 | 2021-12-07 | 中国建设基础设施有限公司 | Wet grinding preparation method of water glass excitant for geopolymer |
-
2005
- 2005-12-06 CN CN 200510129362 patent/CN1978320A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798095A (en) * | 2010-03-10 | 2010-08-11 | 昊青薪材（北京）技术有限公司 | Process for preparing sodium potassium silicate solution by predesiliconizing potassium-rich rock |
| CN113753906A (en) * | 2021-09-16 | 2021-12-07 | 中国建设基础设施有限公司 | Wet grinding preparation method of water glass excitant for geopolymer |
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