CS276689B6 - Process for preparing calcium carbonate - Google Patents
Process for preparing calcium carbonate Download PDFInfo
- Publication number
- CS276689B6 CS276689B6 CS903725A CS372590A CS276689B6 CS 276689 B6 CS276689 B6 CS 276689B6 CS 903725 A CS903725 A CS 903725A CS 372590 A CS372590 A CS 372590A CS 276689 B6 CS276689 B6 CS 276689B6
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- calcium
- calcium carbonate
- carbonate
- carbon dioxide
- hydrate
- Prior art date
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 24
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 10
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000001099 ammonium carbonate Substances 0.000 claims abstract description 6
- 235000012501 ammonium carbonate Nutrition 0.000 claims abstract description 6
- 239000000725 suspension Substances 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims abstract description 3
- 239000002440 industrial waste Substances 0.000 claims abstract description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract 2
- 239000000908 ammonium hydroxide Substances 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims 1
- 229920006395 saturated elastomer Polymers 0.000 claims 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000011575 calcium Substances 0.000 abstract description 4
- 235000011132 calcium sulphate Nutrition 0.000 abstract description 4
- 239000001175 calcium sulphate Substances 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052791 calcium Inorganic materials 0.000 abstract description 2
- 150000001638 boron Chemical class 0.000 abstract 1
- 229910052796 boron Inorganic materials 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 159000000007 calcium salts Chemical class 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 description 2
- 239000001639 calcium acetate Substances 0.000 description 2
- 235000011092 calcium acetate Nutrition 0.000 description 2
- 229960005147 calcium acetate Drugs 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 235000019253 formic acid Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 125000001477 organic nitrogen group Chemical group 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000003295 industrial effluent Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 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
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
- C01F11/182—Preparation of calcium carbonate by carbonation of aqueous solutions and characterised by an additive other than CaCO3-seeds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Riešenie sa týká premeny síranu vápenatého vo formě bozvodého hemihydrátu alebo hydrátu na uhličitan vápenatý s velkos- íou častíc do 50/um. Podstatou riešenia je, že na bezvodý hemihydrát alebo hydrát eira- nu vápenatého vo formě či3tej zlúčeniny, suroviny alebo priemyselného odpadu sa posobí stechiometrickým alebo nadstechio- metrickým množstvom hydroxidu amonného a/alebo uhličitanu amonného pri teplote 10 až 60 oc, vzniknutá suspenzia sa sýti plynom s obsahom oxidu uhličitého 3 až 100 % hmot., pokial sa nedosiahne pH = ■ 7 + 0,5 a následná sa odfiltruje a suší sa pri teplote do 200 °C.The solution relates to the conversion of calcium sulphate in the form of a boron hemihydrate or hydrate to calcium carbonate with a particle size of up to 50 µm. The essence of the solution is, whereas the anhydrous hemihydrate or hydrate of calcium eiraph in the form of either a compound, raw material or industrial waste is treated with a stoichiometric or overstoichiometric amount of ammonium hydroxide and / or ammonium carbonate at a temperature of 10 to 60 ° C, the resulting suspension being carbonated with carbon dioxide gas 3 to 100% by weight until pH = 7 + 0.5, followed by filtration and drying at up to 200 ° C.
Description
Vynález sa týká sposobu přípravy uhličitanu vápnika z vodnej suspenzie síranu vápnika alebo jeho hydrátov.The invention relates to a process for the preparation of calcium carbonate from an aqueous suspension of calcium sulphate or its hydrates.
V literatúre sú popísané rožne sposoby přípravy uhličitanu vápenatého karbonatáciou suspenzie hydroxidu vápenatého s plynným oxidom uhličitým, selektívnym vylúhovaním oxidu alebo hydroxidu vápenatého zo surovin alebo priemyselných odpadov na rozpustné vápenaté soli anorganických připadne organických kyselin v přítomnosti organickej dusíkatej zásady, ktorá obsahuje aspoň jednu hydroxylovú skupinu a nasledovnou karbonatáciou týchto soli s oxidom uhličitým, přípravou roztoku mravenčenu alebo octanu vápenatého z vápenatých surovin a z něho zrážanim uhličitan vápenatý 1) uhličitanem amonným alebo a C02 a NH^OH, 2) uhličitanem organickej dusikatej zásady, zrážanim uhličitanu vápenatého 1) rsakciou vodorozpustnej vápenatej soli amoniakom a oxidom uhličitým alebo uhličitanem amonným, 2) z roztoku po regenerácii sodárenského lúhu vápenným mliekom, obsahujúcim převážné CaCl2 amoniakom a oxidem uhličitým alebo uhličitanem amonným, výrobou uhličitanu vápenatého z dusičnanu vápenatého pri výroba NP - alebo NPK - hnojiv zrážanim s amoniakom a oxidom uhličitým.Various methods for preparing calcium carbonate by carbonating a suspension of calcium hydroxide with carbon dioxide gas, selectively leaching calcium oxide or hydroxide from raw materials or industrial wastes to soluble calcium salts of inorganic or organic acids in the presence of an organic nitrogen base containing at least one hydroxyl group are described in the literature. subsequent carbonation of these salts with carbon dioxide, preparation of a solution of formic acid or calcium acetate from calcium raw materials and precipitation with calcium carbonate 1) ammonium carbonate or and CO 2 and NH 4 OH, 2) organic nitrogen carbonate base, precipitation of calcium carbonate 1) by the reaction of water-soluble calcium salts with ammonia and carbon dioxide or ammonium carbonate, 2) from solution after regeneration of sodium hydroxide solution with lime milk, containing mainly CaCl 2 with ammonia and carbon dioxide or ammonium carbonate, production of calcium carbonate from calcium nitrate in the production of N P - or NPK - fertilizers by precipitation with ammonia and carbon dioxide.
Nedostatkem uvedených sposobov výroby ja priprava uhličitanu vápenatého iba z rozpustných vápenatých solí CaO, Ca(0H)2, mravenčenu a octanu vápenatého, CaCl2 a Ca(N03)2·The disadvantage of these production methods is the preparation of calcium carbonate only from soluble calcium salts of CaO, Ca (OH) 2 , formic acid and calcium acetate, CaCl 2 and Ca (NO 3 ) 2 ·
Uvedený nedostatek v podstatnsj misre odstraňuje sposob podlá vynálezu, ktorého podstata spočiva v tom, že málo rozpustná zlúčenina, surovina alebo priemyselný odped bezvodého hemihydrátu alebo dihydrátu síranu vápenatého sa při taplots 10 až 60 °C, výhodné pri 20 °C meni vo forme suspenzie s hodnotou pH 10 až 12 v přítomnosti stechiometrického alebo nadstechiometrického, výhodné trojstechiometrického přebytku NH40H na uhličitan vápenatý sýtenim za miešania plynným 100% oxidom uhličitým alebo jeho zmesou so vzduchem až do prebehnutia reakcieThis disadvantage is substantially eliminated by the process according to the invention, which consists in that the sparingly soluble compound, raw material or industrial effluent of anhydrous hemihydrate or calcium sulphate dihydrate is changed at taplots of 10 to 60 ° C, preferably at 20 ° C, in the form of a suspension with pH 10 to 12 in the presence of a stoichiometric or overstoichiometric, preferably three-stoichiometric excess of NH 4 OH on calcium carbonate by saturation with stirring with 100% carbon dioxide gas or a mixture thereof with air until the reaction proceeds
CaS04 + 2NH40H + C02 = CaC03 + (NH4)2 S04 + H20 alebo s trojstechiometrickým přebytkem uhličitanu amonného za miešaniaCaSO 4 + 2NH 4 OH + CO 2 = CaCO 3 + (NH 4 ) 2 SO 4 + H 2 O or with a three-stoichiometric excess of ammonium carbonate with stirring
CaS04 + (NH4)2 C03 π CaC03 + (NH4)2S04 .CaSO 4 + (NH 4 ) 2 CO 3 π CaCO 3 + (NH 4 ) 2 SO 4 .
Zrnitý uhličitan vápenatý s veíkostou častíc do 50 ,um sa odfiltruje, premyjs a suší při teplote pod 200 C. Filtrát a premývaci roztok sa recirkuluje po regenerácii s pridavkom NH40H alebo (NH4)2 C03 k premene CaS04 na CaC03. Po vzraste sušiny recirkulátu na 10 % obsah sa vydělí ako tekuté zmesné hnojivo (NH4)2 C03 a (NH4)2 S04 .The granular calcium carbonate having the particle size up to 50 microns was collected by filtration and dried premyjs at a temperature below 200 C. The filtrate and the washing solution is recycled after recovery of the addition of NH 4 0H or (NH 4) 2 C0 3 to convert the 4 time0 CaC0 3 . After the dry matter of the recirculate has been increased to 10%, the content is divided as a liquid mixed fertilizer (NH 4 ) 2 CO 3 and (NH 4 ) 2 SO 4 .
Premenou práškového siranu vápenatého na uhličitan vápenatý v amoniakálnom prostředí s oxidom uhličitým sa získá jemnozrnný uhličitanový materiál s možnostou uplatnenia ako plniva do polymérnych hmot, v polnohospodárstve na úpravu peci a v chemickém, kozmetickom, potravinářském a farmaceutickém priemysle ako plnivo a přísada.The conversion of powdered calcium sulphate to calcium carbonate in an ammoniacal medium with carbon dioxide gives a fine-grained carbonate material which can be used as a filler in polymeric materials, in kiln processing agriculture and in the chemical, cosmetic, food and pharmaceutical industries as a filler and additive.
PřikladExample
100 kg bezvodého siranu vápenatého sa při teplote 20 DC rozmieša s dvejstechiematrickým 435 kg množstvem 26% roztoku amoniakalizovanej vody na suspenziu s hodnotou pH « 12. V priebehu 100 minút sa za miešania suspenzia zneutralizuja na hodnotu pH => 7 s oxidom uhličitým, pričom sa pri 99,5% výtažnosti ziska 73,0 kg CaC03 a 96,3 kg(NH4)2S04. Po odfiltrováni a premytí CaC03 s vodou sa tento suši pri 120 °C a zhomogenizuje sa na jemnozrnný prášok s veíkostou částic do 50 ^um. Roztoky s obsahom (NH4)2 C03 a (NH4)2 S04 sa po zalkalizovani s 26% vodným roztokem NH4OH dajú recirkulovat pri premene CaS04 na CaC03 alebo využit ako tekuté hnojivo v polnohospodárstve.100 kg of calcium sulfate at 20 D C dvejstechiematrickým stirred with 435 kg množstvem 26% ammoniacal water solution into a suspension having a pH of '12 W 100 minutes while stirring the suspension neutralized to pH> 7 with carbon dioxide, wherein 73.0 kg of CaCO 3 and 96.3 kg of (NH 4 ) 2 SO 4 are obtained at 99.5% yield. After filtration and washing with CaCO 3 with water, it is dried at 120 DEG C. and homogenized into a fine-grained powder with a particle size of up to 50 .mu.m. Solutions containing (NH 4 ) 2 CO 3 and (NH 4 ) 2 SO 4 after basification with 26% aqueous NH 4 OH solution can be recirculated during the conversion of CaSO 4 to CaCO 3 or used as a liquid fertilizer in agriculture.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS903725A CS276689B6 (en) | 1990-07-26 | 1990-07-26 | Process for preparing calcium carbonate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS903725A CS276689B6 (en) | 1990-07-26 | 1990-07-26 | Process for preparing calcium carbonate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS372590A3 CS372590A3 (en) | 1992-03-18 |
| CS276689B6 true CS276689B6 (en) | 1992-07-15 |
Family
ID=5378147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS903725A CS276689B6 (en) | 1990-07-26 | 1990-07-26 | Process for preparing calcium carbonate |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS276689B6 (en) |
-
1990
- 1990-07-26 CS CS903725A patent/CS276689B6/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS372590A3 (en) | 1992-03-18 |
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