DEC0010251MA - - Google Patents
Info
- Publication number
- DEC0010251MA DEC0010251MA DEC0010251MA DE C0010251M A DEC0010251M A DE C0010251MA DE C0010251M A DEC0010251M A DE C0010251MA
- Authority
- DE
- Germany
- Prior art keywords
- calcium
- ammoniacal
- hydroxide suspension
- ivb
- precipitated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 229940043430 calcium compound Drugs 0.000 claims description 3
- 150000001674 calcium compounds Chemical class 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 159000000007 calcium salts Chemical class 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims 2
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims 1
- 150000008041 alkali metal carbonates Chemical class 0.000 claims 1
- 239000001569 carbon dioxide Substances 0.000 claims 1
- 229910002092 carbon dioxide Inorganic materials 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- NVBFHJWHLNUMCV-UHFFFAOYSA-N sulfamide Chemical class NS(N)(=O)=O NVBFHJWHLNUMCV-UHFFFAOYSA-N 0.000 description 1
- 150000003892 tartrate salts Chemical class 0.000 description 1
Description
BUNDESREPUBLIK DEUTSCHLANDFEDERAL REPUBLIC OF GERMANY
Tag der Anmeldung: 11. November 1954 Bekanntgemacht am 1. Dezember 1955Registration date: November 11, 1954. Advertised on December 1, 1955
DEUTSCHES PATENTAMTGERMAN PATENT OFFICE
Gegenstand des Patents (AnmeldungSubject of the patent (application
C 9649 IVb/12m) ist ein Verfahren zur Herstellung eines extrem feinteiligen, gefällten, im wesentlichen aus Calciumcarbonat bestehenden Gemisches von Calciumverbindungen durch Umsetzung von Lösungen eines Calciumsalzes 'mit Carbonaten der Alkalien bzw. des Ammoniums im pH-Bereich von 8 bis 12 durch Vermischen, welches dadurch gekennzeichnet ist, daß man die Stabilisierung der entstandenen Gallerte durch Zusatz von Salzen komplexbildender, mehrbasischer, organischer Oxysäuren, beispielsweise Citraten oder Tartraten, oder Salzen komplexbildender, polymerer Phosphorsäuren, beispielsweise Tripolyphosphaten oder Hexametaphosphaten oder deren Gemischen, vornimmt.C 9649 IVb / 12m) is a process for preparing extremely fine particle of a precipitated, consisting essentially of calcium carbonate mixture of calcium compounds by reaction of solutions of a calcium salt 'with carbonates of the alkali metals or of ammonium in the p H range 8 to 12 by Mixing, which is characterized in that the jelly formed is stabilized by adding salts of complexing, polybasic, organic oxyacids, for example citrates or tartrates, or salts of complexing, polymeric phosphoric acids, for example tripolyphosphates or hexametaphosphates or mixtures thereof.
Durch gleichzeitigen Zusatz eines löslichen Fluorides oder Silicofluorides kann die Menge des zuzusetzenden Komplexbildners bis auf die Hälfte der erforderlichen Menge herabgesetzt werden.By simultaneously adding a soluble fluoride or silicon fluoride, the amount of complexing agent to be added can be reduced to half the required amount.
Weiter hat es sich als vorteilhaft erwiesen, dem Reaktionsgemi'sch bestimmte organische, polare Substanzen, wie z. B. die Amine, Amide oder Sulfamide langkettiger, gesättigter oder unge-It has also proven advantageous to add certain organic, polar ones to the reaction mixture Substances such as B. the amines, amides or sulfamides of long-chain, saturated or unsaturated
509 597/42509 597/42
C 10251 IVa/12mC 10251 IVa / 12m
sätligler Fettsäuren oder ein bzw. mehrwertige, langkettige Alkohole oder langkettige Aldehyde oder Ketone, zuzusetzen.fatty acids or mono- or polyvalent, long-chain alcohols or long-chain aldehydes or ketones.
Es wurde nun gefunden, dall an Stelle der Umsetzung einer Calciumsalzlösung mit einer ammoniakali sehen Alkalicarbonat lösung eine ammoniakalische CaIo iunihydroxyd-Suspens ion mit Kohk'iidioxyd versetzt werden kann.It has now been found that instead of reacting a calcium salt solution with a ammonia see alkali carbonate solution a ammoniacal calcium hydroxide suspension with Kohk'iidioxyd can be added.
B e i s ρ i e 1B e i s ρ i e 1
In 70 1 einer Calciumhydroxyd-Suspension, die 3,7 kg Caloiumhydroxyd und 2,4kg AmmoniakIn 70 l of a calcium hydroxide suspension, the 3.7 kg of potassium hydroxide and 2.4 kg of ammonia
:3 — sowie als Zu— Molverhällnis Ca :N H;1= 1 : 3 - and as an additional molar ratio Ca: NH ; 1 = 1
;1;1
satzstoffe 0,25 kgNatriumtripolyphosphat und 0,2kg Kokosfetlamin enthält, wird bei gewöhnlicher Temperatur unt er gut em R uhren Kohlend ioxydeingeleitet. Nach lieendigung der Reaktion wird das Fällungsprodukl filtriert, gewaschen, getrocknet und gemahlen. Man erhält 5 kg reinweißes, hochvoluminöses, im wesentlichen aus Calciumcarbonat bestehendes Gemisch von Calciumverbindungen mit einem Schüttgewicht von 90 g/l und einer Teilchengröße unter 0,1 μ. set fabrics containing 0.25 kgNatriumtripolyphosphat and 0.2kg Kokosfetlamin is at ordinary temperature, it unt well em stirring Kohlend ioxydeingeleitet. After the reaction has ended, the precipitate is filtered, washed, dried and ground. 5 kg of pure white, highly voluminous mixture of calcium compounds consisting essentially of calcium carbonate with a bulk density of 90 g / l and a particle size of less than 0.1 μ is obtained.
Die ammoniakalische Mutterlauge kann wieder verwendet werden.The ammoniacal mother liquor can be reused.
Claims (1)
Family
ID=
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