CN105460961B - A kind of method that nodeless mesh aqueous carbonate magnesium is prepared using heavy magnesium water - Google Patents
A kind of method that nodeless mesh aqueous carbonate magnesium is prepared using heavy magnesium water Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 33
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 title claims abstract description 32
- 239000011777 magnesium Substances 0.000 title claims abstract description 31
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 29
- 238000001035 drying Methods 0.000 claims abstract description 33
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 19
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 19
- 239000000047 product Substances 0.000 claims abstract description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 13
- 230000001376 precipitating effect Effects 0.000 claims abstract description 13
- 239000012065 filter cake Substances 0.000 claims abstract description 11
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 10
- 239000000706 filtrate Substances 0.000 claims abstract description 7
- 239000000725 suspension Substances 0.000 claims abstract description 7
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 6
- 238000002425 crystallisation Methods 0.000 claims abstract description 4
- 230000008025 crystallization Effects 0.000 claims abstract description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 17
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 9
- 239000000347 magnesium hydroxide Substances 0.000 claims description 9
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 9
- 239000000395 magnesium oxide Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- UOVKYUCEFPSRIJ-UHFFFAOYSA-D hexamagnesium;tetracarbonate;dihydroxide;pentahydrate Chemical compound O.O.O.O.O.[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O.[O-]C([O-])=O UOVKYUCEFPSRIJ-UHFFFAOYSA-D 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- QWDJLDTYWNBUKE-UHFFFAOYSA-L magnesium bicarbonate Chemical compound [Mg+2].OC([O-])=O.OC([O-])=O QWDJLDTYWNBUKE-UHFFFAOYSA-L 0.000 claims description 3
- 239000002370 magnesium bicarbonate Substances 0.000 claims description 3
- 229910000022 magnesium bicarbonate Inorganic materials 0.000 claims description 3
- 235000014824 magnesium bicarbonate Nutrition 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 claims 1
- 239000001257 hydrogen Substances 0.000 claims 1
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims 1
- 229910001948 sodium oxide Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000003063 flame retardant Substances 0.000 abstract description 4
- XNEYCQMMVLAXTN-UHFFFAOYSA-N carbonic acid;magnesium Chemical compound [Mg].OC(O)=O XNEYCQMMVLAXTN-UHFFFAOYSA-N 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000003756 stirring Methods 0.000 description 5
- 239000010459 dolomite Substances 0.000 description 4
- 229910000514 dolomite Inorganic materials 0.000 description 4
- CSNNHWWHGAXBCP-UHFFFAOYSA-L magnesium sulphate Substances [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- ZEGDXSGIGIQDPG-UHFFFAOYSA-N carbon dioxide;magnesium Chemical compound [Mg].O=C=O ZEGDXSGIGIQDPG-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L magnesium chloride Substances [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 238000005360 mashing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M sodium bicarbonate Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- 241001131796 Botaurus stellaris Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- PRKQVKDSMLBJBJ-UHFFFAOYSA-N ammonium carbonate Chemical compound N.N.OC(O)=O PRKQVKDSMLBJBJ-UHFFFAOYSA-N 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 239000003845 household chemical Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 229940127557 pharmaceutical product Drugs 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000000606 toothpaste Substances 0.000 description 1
- 229940034610 toothpaste Drugs 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/24—Magnesium carbonates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a kind of method that nodeless mesh aqueous carbonate magnesium is prepared using heavy magnesium water：Comprise the following steps：（1）A certain amount of precipitating reagent is added into heavy magnesium water at normal temperatures, generates the carbonic acid magnesium precipitate suspension containing the crystallization water；（2）Above-mentioned suspension is separated by filtration, collects filter cake, filtrate storage, comprehensive utilization；（3）Filter cake carries out low temperature drying, drying temperature is controlled at 70 ~ 150 DEG C through secondary drying first in containing carbon dioxide atmosphere, more than 90% Free water is removed, is then fed into high temperature drying, drying temperature is controlled at 150 ~ 300 DEG C, remaining Free water and the crystallization water are removed, nodeless mesh aqueous carbonate magnesium products are made.The method investment cost of the present invention is low, overcomes the high disadvantage of carbonizatin method energy consumption, and relatively lightweight magnesium carbonate production effects of energy saving and emission reduction is notable, there is provided fire retardant new product.
Description
Technical field
It is particularly a kind of to be carbonized using dolomite carbonizatin method, magnesite the present invention relates to a kind of method for preparing magnesium carbonate
The method that heavy magnesium water in method technique prepares nodeless mesh aqueous carbonate magnesium, belongs to technical field of preparation for inorganic material.
Background technology
" the carbonic acid magnesium products " for using and selling on domestic and international market at present, in addition to magnisite carbonic acid magnesium products,
Artificial synthesized " magnesium carbonate " product is hydrated basic magnesium carbonate：xMgCO3·yMg(OH)2·zH2O, wherein x=1 ~ 4, y=0 ~
1, z=0 ~ 8.Have according to the literature as form existing for the hydrate of magnesium carbonate：MgCO3·H2O、MgCO3·3H2O、MgCO3·
2H2O and basic magnesium carbonate：4MgCO3·Mg(OH)2·8H2O、4MgCO3·Mg(OH)2·6H2O、4MgCO3·Mg(OH)2·
5H2O、4MgCO3·Mg(OH)2·4H2O、4MgCO3·Mg(OH)2·7H2O；3MgCO3·Mg(OH)2·3H2O、3MgCO3·Mg
(OH)2·4H2The forms such as O.When sell product in 4MgCO3·Mg(OH)2·4H2Based on O products.
The preparation method of industrial hydrated basic magnesium carbonate is roughly divided into：（1）MgCl2Or MgSO4Method of Soda；（2）MgCl2
Or MgSO4Sodium bicarbonate method or ammonium bicarbonate method；（3）Carbonizatin method, it is divided into dolomite carbonizatin method, magnesite（Light-magnesite powder）Carbon
Change method, asbestos tailings carbonizatin method, bittern（Bischofite）Lime or dolomite ash carbonizatin method etc.；（4）Double decomposition etc..Above method
In due to technological reaction system property determine can not or be difficult to produce nodeless mesh aqueous carbonate magnesium products.Hydrated basic magnesium carbonate is again
Claim light magnesium carbonate, relative density is small, light and loose, can be used as the excellent filler and reinforcing agent of rubber.Because it has
Have do not burn with quality it is light the characteristics of, available for adiabatic, resistant to elevated temperatures fire-retardant heat-insulation material, it can also be used to manufacture glass system
The household chemicals such as product, magnesium salts, pigment, paint, fireproof coating, printing-ink, ceramics, cosmetics, toothpaste and pharmaceutical products, food
Grade light magnesium carbonate can be used for flour additive, it may also be used for drier, carrier, anti-caking agent etc..With entering for epoch
Step, is also continued to develop to magnesium carbonate demand.Not only demand light magnesium carbonate, the heavier magnesium carbonate of some industry requirements, such as mould
Expect industry.As fire retardant in use, needing the higher product of processing temperature.In recent years, nodeless mesh aqueous carbonate magnesium is prepared and drawn
Play domestic and international scientific and technological circle's concern.Patent CN1362371A provides one kind and high purity magnesium oxide or carbonic acid is prepared in circulatory mediator
The method of magnesium, the aqueous carbonate ammonium of intermediate products four is prepared by raw material of industrial hex-ammoniate, magnesium sulfate, magnesium nitrate and ammonium carbonate solution
Magnesium double salt precipitation, filtered, low temperature thermal decomposition prepare nodeless mesh aqueous carbonate magnesium.Dalian University Of Communications Wang Jing et al. is proposed with chlorination
Magnesium is raw material, and urea is precipitating reagent, and under conditions of sodium citrate makees surfactant, Carbon Dioxide is prepared using hydro-thermal method
Magnesium powder body, industrialized production is not implemented.
The content of the invention
It is an object of the invention to provide a kind of method that nodeless mesh aqueous carbonate magnesium is prepared using heavy magnesium water, its raw material sources
Extensively, it is easily achieved industrialized production.
The method of the present invention is using heavy magnesium water as primary raw material.In dolomite carbonizatin method or magnesite carbonizatin method production industry water
Close in basic magnesium carbonate technique, the filtrate that carbodiimide solution filters to isolate, referred to as heavy magnesium water, dissolving magnesium bicarbonate is contained in heavy magnesium water
Weak solution, in terms of MgO, 4 ~ 10g/L of content.
Specifically, a kind of method that nodeless mesh aqueous carbonate magnesium is prepared using heavy magnesium water of the present invention, is comprised the following steps：
（1）Precipitating reagent is added into heavy magnesium water, the addition of precipitating reagent is 0.4 ~ 1.2 of MgO molal quantities in heavy magnesium water
Times, precipitating reagent is reacted with the magnesium bicarbonate in heavy magnesium water, generates hydrated basic magnesium carbonate precipitated product suspension；
Precipitating reagent used is：Ammoniacal liquor, sodium hydroxide, potassium hydroxide, magnesium hydroxide, magnesia, light-magnesite powder, wherein
One or more of mixtures；
（2）Suspension is filtered, carries out separation of solid and liquid, collects filter cake, filtrate comprehensive utilization；
（3）By step（2）Gained filter cake is sent into the secondary drying system of low temperature drying and high temperature drying composition, wherein, it is low
Temperature drying is carried out in carbon dioxide atmosphere, 70 ~ 150 DEG C of temperature of control, and more than 90% freely in low temperature drying stage removing filter cake
Moisture content；High temperature drying system is sent into containing the magnesium carbonate of less than 10% free moisture content and whole crystallizations water, controls temperature 150 ~ 300
DEG C, nodeless mesh aqueous carbonate magnesium products are made.
The method of the present invention, step（3）In, carbon dioxide mass concentration 10% ~ 60%, can be purification containing CO2 gases
Mixture has CO2 mixed gas etc. in boiler flue or cleaned air after the kiln gas of various calcining kilns or purification afterwards.Low temperature
Dry and high temperature drying phases-time is respectively 2 ~ 6 h.
The method of the present invention, secondary drying equipment, low temperature drying optional drying box in the lab are optional in industrial production
With box drier, band drier, chain laminar drying machine, tunnel-kiln type dry kiln etc.；High temperature drying is optional in the lab
Drier is made by oneself with stainless steel tube, and rotary dryer, Rotatingandflashstreamingdrier, strong drying machine, gas can be selected in industrial production
Flow drying machine etc..
What the present invention obtained has the beneficial effect that：The method investment cost of the present invention is low, overcomes carbonizatin method energy consumption
High disadvantage, production process effects of energy saving and emission reduction is notable, and fire retardant new product is provided for market.
Embodiment
Following examples are used to illustrate the present invention.
Embodiment 1
The heavy magnesium water 1000mL of the MgO containing 6g/L is added in reactor, temperature is 30 DEG C, is 2mol/L ammoniacal liquor by concentration
150mL is slowly added in reactor heavy magnesium water, opens mixer, and rotating speed control is stirred in 50 ~ 60 turns/min, stirring 3h, stopping,
Cooling 3h, observation precipitation are staticly settled, and is filtered, adds 500mL mashing washings to filter every time with distilled water 2 times, filter cake is sent
Drying box, low temperature drying 3h is carried out at 120 DEG C, wherein Free water is containing about 5%；It is placed on again in stainless steel tube, in 200 DEG C of perseverances
Warm 2h, Carbon Dioxide magnesium products 11.5g, the magnesium rate of recovery 92% is made.Filtrate and wash water are separately stored in filtrate receiver and wash water groove,
Digestion and carbonization water can be used as.
Embodiment 2
The heavy magnesium water 1000mL into the MgO containing 7g/L is contained in reactor, temperature is 40 DEG C, is 2mol/L NaOH by concentration
Solution 180mL is slowly added in reactor heavy magnesium water, opens mixer, and rotating speed controls in 50 ~ 60 turns/min, stirs 2.5h, stop
Only stir, staticly settle cooling 2.5h, observation precipitation, and filtered, add 500mL mashing washings to filter 2 every time with distilled water
Secondary, filter cake send drying box, carries out low temperature drying 3.5h at 110 DEG C, wherein Free water is containing about 6%；It is placed on again in stainless steel tube
In 190 DEG C of constant temperature 2.5h, Carbon Dioxide magnesium products 13.5g, the magnesium rate of recovery 91.84% is made.Filtrate and wash water are separately stored in filter
Liquid bath and digestive shelf, comprehensive utilization.
Embodiment 3
The heavy magnesium water 1000mL into the MgO containing 8g/L is contained in reactor, temperature is 50 DEG C, is 1mol/L Mg by concentration
(OH) 2 suspension 100mL are slowly added in reactor heavy magnesium water, open mixer, rotating speed control is in 50 ~ 60 turns/min, stirring
2h, stop stirring, staticly settle cooling 2h, filter, filter cake send drying box, in 105 DEG C, 30% CO2Low temperature drying 3h under atmosphere,
Wherein Free water is containing about less than 6%；It is placed on again in stainless steel tube in 200 DEG C of constant temperature 2h, Carbon Dioxide magnesium products is made
28.9g, the magnesium rate of recovery 96.94%.
Claims (3)
- A kind of 1. method that nodeless mesh aqueous carbonate magnesium is prepared using heavy magnesium water, it is characterised in that comprise the following steps：（1）Precipitating reagent is added into heavy magnesium water, the addition of precipitating reagent is 0.4 ~ 1.2 times of MgO molal quantities in heavy magnesium water, is sunk Shallow lake agent is reacted with the magnesium bicarbonate in heavy magnesium water, generates hydrated basic magnesium carbonate precipitated product suspension；Precipitating reagent used is the mixture of first kind precipitating reagent and the second class precipitating reagent, and wherein first kind precipitating reagent is ammoniacal liquor, hydrogen One or more in sodium oxide molybdena, potassium hydroxide, the second class precipitating reagent are in magnesium hydroxide, magnesia, light-magnesite powder It is one or more；（2）Suspension is filtered, carries out separation of solid and liquid, collects filter cake, filtrate comprehensive utilization；（3）By step（2）Gained filter cake is sent into the secondary drying system being made up of low temperature drying and high temperature drying, wherein, low temperature Drying is carried out in carbon dioxide atmosphere, controls 70 ~ 150 DEG C of temperature, and the low temperature drying stage removes more than 90% Free water in filter cake Part；High temperature drying system is sent into containing the magnesium carbonate of less than 10% free moisture content and whole crystallizations water, controls 150 ~ 300 DEG C of temperature, Nodeless mesh aqueous carbonate magnesium products are made.
- 2. according to the method for claim 1, it is characterised in that step（3）In, carbon dioxide mass concentration 10% ~ 60%, contain There is CO2Gas is that mixture has CO in boiler flue or cleaned air after the kiln gas of various calcining kilns or purification after purification2It is mixed Close gas.
- 3. according to the method for claim 1, it is characterised in that low temperature drying stage and high temperature drying phases-time are respectively 2 ~6h。
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| CN105883865B (en) * | 2016-04-13 | 2017-11-14 | 北京化工大学 | A kind of environment-friendly preparation technology of high pure and ultra-fine anhydrous magnesium carbonate |
| CN106745110B (en) * | 2016-11-30 | 2018-02-27 | 营口市荣兴达科技实业有限公司 | A variety of crystal formation high purity magnesium carbonates and preparation method thereof |
| CN108773848B (en) * | 2018-08-23 | 2020-03-31 | 淄博美盛化工有限公司 | Device and method for preparing heavy magnesium carbonate from heavy magnesium water |
| CN113735238A (en) * | 2021-10-28 | 2021-12-03 | 中国人民解放军陆军军医大学士官学校 | Process for co-producing magnesium carbonate series products by seawater desalination device |
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| DE1442761A1 (en) * | 1963-12-07 | 1969-01-23 | Licencia Talalmanyokat | Method and device for carrying out reactions between gases and liquids or suspensions under pressure |
| CN1410351A (en) * | 2001-10-08 | 2003-04-16 | 中国科学院过程工程研究所 | Method of preparing light magnesium carbonate from heavy magnesium water |
| CN1186256C (en) * | 2002-06-14 | 2005-01-26 | 中国科学院过程工程研究所 | Process for preparing magnesium carbonate whisker |
| CN101327942A (en) * | 2008-07-29 | 2008-12-24 | 国家海洋局天津海水淡化与综合利用研究所 | Method for preparing light magnesium carbonate and magnesium oxide from dolomite sea water bittern |
| CN102079533B (en) * | 2010-12-03 | 2012-10-10 | 桐柏兴源化工有限公司 | Method for preparing basic magnesium carbonate and high purity magnesium oxide with trona |
| CN103979584B (en) * | 2014-06-03 | 2016-01-13 | 李广凡 | A kind of boric sludge is for Magnesium Carbonate Light 41-45 technique |
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