DE119592C - - Google Patents
Info
- Publication number
- DE119592C DE119592C DENDAT119592D DE119592DA DE119592C DE 119592 C DE119592 C DE 119592C DE NDAT119592 D DENDAT119592 D DE NDAT119592D DE 119592D A DE119592D A DE 119592DA DE 119592 C DE119592 C DE 119592C
- Authority
- DE
- Germany
- Prior art keywords
- graphite
- fluorides
- hydrofluoric acid
- sulfuric acid
- water
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 150000002222 fluorine compounds Chemical class 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- KRHYYFGTRYWZRS-UHFFFAOYSA-N HF Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 6
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M Sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 claims description 4
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000002378 acidificating Effects 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 238000010306 acid treatment Methods 0.000 claims 1
- 238000004140 cleaning Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 239000011780 sodium chloride Substances 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 235000015450 Tilia cordata Nutrition 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229940100996 SODIUM BISULFATE Drugs 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000342 sodium bisulfate Inorganic materials 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L Calcium fluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N Silicon tetrafluoride Chemical class F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- AZTGOPSQAGBNFT-UHFFFAOYSA-L calcium;sodium;sulfate Chemical compound [Na+].[Ca+2].[O-]S([O-])(=O)=O AZTGOPSQAGBNFT-UHFFFAOYSA-L 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-M hydrogensulfate Chemical compound OS([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-M 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
- C01B32/21—After-treatment
- C01B32/215—Purification; Recovery or purification of graphite formed in iron making, e.g. kish graphite
Landscapes
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
- Ml 19592-KLASSE 12 f.- Ml 19592-CLASS 12 f.
Patentirt im Deutschen Reiche vom 22. Februar 1899 ab.Patented in the German Empire on February 22nd, 1899.
Läfst man Flufssäure auf unreinen Graphit einwirken, so entstehen die Fluoride der im Graphit vorhandenen mineralischen Beimengungen. Nach Dammer, Handbuch der anorganischen Chemie, Bd. II, 1, 267, bestehen diese aus Kieselsäure, Thonerde, Eisen, Kalk, Magnesia und Alkalien. Von den sich bildenden Fluoriden ist ein Theil leicht löslich, ein Theil schwer oder unlöslich. Zu den letzteren beiden Gruppen gehören die Fluoride der Thonerde, des Kalkes und der Magnesia, sowie die Siliciumfluoride der Alkalien. Die Bedingungen für die Bildung der letzteren sind vollständig vorhanden. Die Menge dieser unlöslichen Fluorverbindungen ist bei den verschiedenen Graphiten ungleich und wechselt von 10 bis 50 pCt. der gesammten, ursprünglich im Graphit vorhanden gewesenen Verunreinigungen. If hydrofluoric acid is allowed to act on impure graphite, the fluorides of the im are formed Graphite existing mineral additions. After Dammer, Handbook of Inorganic Chemistry, Vol. II, 1, 267, these consist of silica, alumina, iron, lime, Magnesia and alkalis. Some of the fluorides which form are easily soluble, some Partly difficult or insoluble. The latter two groups include the fluorides of the Alumina, lime, and magnesia, and the silicon fluorides of alkalis. the Conditions for the formation of the latter are completely in place. The amount of these insoluble Fluorine compounds are unequal in the various graphites and vary from 10 to 50 pCt. the whole, originally Impurities present in the graphite.
Es ist bereits bekannt, diese Fluoride nun durch Schwefelsäure zu zersetzen.. Da aber die Wirkung der Schwefelsäure nicht immer zugleich eine Lösung dieser Fluoride herbeiführt, wie z. B. bei Umwandlung des Fluorcalciums in schwefelsauren Kalk, so ist die Wirkung dieser Säure vielfach ungenügend, und wurde daher die Schwefelsäure durch saure Alkalisulfate, insbesondere Natriumbisulfat, wie es in der Technik in grofsen Mengen als Abfallproduct gewonnen wird, ersetzt. Der Vorzug der Anwendung des Natriumbisulfates zur Entfernung obengenannter Fluoride beruht darin, dafs es, nachdem es die Fluoride in Sulfate umgewandelt hat, mit den Sulfaten in lösliche Doppelverbindungen eintritt, z. B. Calcium-Natriumsulfat, und können diese Doppelverbindungen sodann durch Auswaschen mit Wasser entfernt werden. Es ist also ein reinerer Graphit zu erzielen. Ein weiterer Vorzug der Anwendung von Bisulfat an Stelle von freier Schwefelsäure beruht darin, dafs durch diese Reaction gleichzeitig neutrales Natriumsulfat gebildet wird, welches aus dem Reactionsproduct durch Wasser entfernt werden kann und einen werthvolleren Handelsartikel darstellt, als das Natriumbisulfat.It is already known that these fluorides can now be decomposed by sulfuric acid .. But since the The effect of sulfuric acid does not always lead to a solution of these fluorides at the same time, such as B. when converting calcium fluoride into lime sulphate, the effect is this acid is often insufficient, and therefore sulfuric acid was replaced by acidic alkali sulphates, especially sodium bisulphate, as used in technology in large quantities as a waste product is won, replaced. The benefit of using the sodium bisulfate for removal The above-mentioned fluoride is based on the fact that after it has converted the fluoride into sulphates has converted, enters into soluble double compounds with the sulfates, e.g. B. Calcium Sodium Sulphate, and these double compounds can then be removed by washing out with water. So it's a to achieve purer graphite. Another benefit of using bisulfate in place of free sulfuric acid is based on the fact that this reaction simultaneously produces neutral Sodium sulfate is formed, which can be removed from the reaction product by water can and is a more valuable article of commerce than sodium bisulfate.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE119592C true DE119592C (en) |
Family
ID=388718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT119592D Active DE119592C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE119592C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE952824C (en) * | 1953-04-15 | 1956-11-22 | Siemens Ag | Process for improving the microphonic properties of coal semolina |
-
0
- DE DENDAT119592D patent/DE119592C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE952824C (en) * | 1953-04-15 | 1956-11-22 | Siemens Ag | Process for improving the microphonic properties of coal semolina |
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