DE872387C - Electrolyte for electrolytic capacitors - Google Patents
Electrolyte for electrolytic capacitorsInfo
- Publication number
- DE872387C DE872387C DES19627D DES0019627D DE872387C DE 872387 C DE872387 C DE 872387C DE S19627 D DES19627 D DE S19627D DE S0019627 D DES0019627 D DE S0019627D DE 872387 C DE872387 C DE 872387C
- Authority
- DE
- Germany
- Prior art keywords
- electrolyte
- electrolytic capacitors
- organic acid
- alkali hydroxide
- tribasic
- 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.)
- Expired
Links
- 239000003792 electrolyte Substances 0.000 title claims description 18
- 239000003990 capacitor Substances 0.000 title claims description 8
- 229910001854 alkali hydroxide Inorganic materials 0.000 claims description 6
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 6
- 239000004135 Bone phosphate Substances 0.000 claims description 5
- 150000007524 organic acids Chemical class 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- YDQUROLTIDVHRK-UHFFFAOYSA-N 2-hydroxypropane-1,2,3-tricarboxylic acid;propane-1,2,3-triol Chemical compound OCC(O)CO.OC(=O)CC(O)(C(O)=O)CC(O)=O YDQUROLTIDVHRK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- AGLSQWBSHDEAHB-UHFFFAOYSA-N azane;boric acid Chemical compound N.OB(O)O AGLSQWBSHDEAHB-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/022—Electrolytes; Absorbents
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Description
Elektrolyt für Elektrolytkondensatoren Löst man in einem Alkohol, z. B. Glycerin, eine dreibasische organische Säure, z. B. Citronensäure, so erhält man eine stark sauer reagierende Lösung. Diese Lösung ist als Elektrolytflüssigkeit für Kondensatoren vollkommen ungeeignet; dies trifft auch zu, wenn man in diese Flüssigkeit noch Borsäure zum gleichen Anteil wie Citronensäure hineinlöst.Electrolyte for electrolytic capacitors If you dissolve in an alcohol, z. B. glycerin, a tribasic organic acid, e.g. B. citric acid so obtained a strongly acidic solution. This solution is called electrolyte fluid completely unsuitable for capacitors; this is also true when you go into this Liquid or boric acid dissolves in the same proportion as citric acid.
Neutralisiert man das Gemisch mit Alkalihydroxyd gegen Lackmus, um die stark sauren Eigenschaften der Lösung zum Verschwinden zu bringen; so ist dieser Elektrolyt auch nicht brauchbar. Kondensatorenwickel, die mit diesem Elektrolyt getränkt werden, korrodieren nach kurzer Betriebsdauer vollständig und gleichmäßig auf der Oberfläche.The mixture is neutralized with alkali hydroxide against litmus to make the strongly acidic properties of the solution disappear; so is this one Electrolyte also not usable. Capacitor winding made with this electrolyte are soaked, corrode completely and evenly after a short period of operation on the surface.
Untersuchungen haben ergeben, daß die jeweilige Menge des Alkalihydroxyds von bedeutendem Einfluß auf die Korrosionswirkung ist.Investigations have shown that the respective amount of alkali hydroxide has a significant influence on the corrosive effect.
Verringert man den Alkalihydroxydgehalt in einem wie obenerwähnten Elektrolyt auf der Basis Glycerin-Citronensäure so weit, daß die Na O H-Menge gerade ausreicht, die 3-C O O H-Gruppen der dreibasischen Säure zu neutralisieren, so erhält man einen Elektrolyt, bei dem die Korrosiön schon weit geringer ist als die Korrosion, welche sich mit dem auf Lackmus neutralisierten Elektrolyt ergibt. Geht man nun erfindungsgemäß mit dem Na O H-Zus-atz so weit zurück, daß dieser gerade dazu ausreicht, von den 3-C O O H-Gruppen nur noch zwei zu neutralisieren, so erhält man eine Salzbildung nach folgender Konstitution: Dauerversuche, die viele Monate gelaufen. sind,` haben ergeben, daß keine Korrosion; mehr im Kondensator erfolgen kann, sobald diese Salzbildung zustande gekommen ist.If the alkali hydroxide content in an electrolyte based on glycerol-citric acid as mentioned above is reduced so far that the amount of Na O H is just sufficient to neutralize the 3-COO H groups of the tribasic acid, an electrolyte is obtained in which the Corrosion is far less than the corrosion that results from the litmus neutralized electrolyte. If, according to the invention, you go back with the addition of Na OH so far that it is just sufficient to neutralize only two of the 3-COO H groups, you get a salt formation according to the following constitution: Endurance tests that have run for many months. are, `have shown that no corrosion; more can take place in the condenser as soon as this salt formation has come about.
Weiterhin wurde gefunden, daß man den- Na O H-Gehalt noch so weit verringern kann, daß von den 3-C O O H-Gruppen nur noch eine - C O O H-Gruppe abgesättigt ist, nach: Dieser Elektrolyt arbeitet ebenfalls korrosionsfrei. Erfindungsgemäß kann der Elektrolyt z. B. folgende Zusammensetzung haben: etwa 2ooo g Alkohol, 2iog Citronensäure, 40 bis max. 8o .g Na 0 H, 2io g Borsäure.It has also been found that the Na O H content can still be reduced to such an extent that of the 3-COO H groups only one - COO H group is saturated, according to: This electrolyte also works without corrosion. According to the invention, the electrolyte can, for. B. have the following composition: about 2ooo g alcohol, 2iog citric acid, 40 to max. 8o .g NaOH, 2io g boric acid.
Das .Verhältnis von Citronensäure zu NaOH und Citronensäure zu Borsäure soll im Elektrolytzusatz stets aufrechterhalten bleiben, während der Gehalt anAlkohol je nach derViskosität schwanken kann; dadurch kann der Elektrolyt sowohl für nasse als auch für trockene Elektrolytkondensatoren verwendet werden.The ratio of citric acid to NaOH and citric acid to boric acid should always be maintained in the electrolyte addition, while the alcohol content can vary depending on the viscosity; this allows the electrolyte for both wet as well as for dry electrolytic capacitors.
Ein Elektrolyt nach obigem Ansatz besitzt eine gute Leitfähigkeit und hat weiterhin gegenüber den üblichen Borsäure-Ammonium-Elektrolyten den Vorteil, daß man ersteren stark kochen kann., ohne daß er sich zersetzt oder ein wesentlicher Bestandteil flüchtig geht.An electrolyte according to the above approach has good conductivity and also has the advantage over the usual boric acid-ammonium electrolytes, that the former can be cooked vigorously without it decomposing or an essential part Component is volatile.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES19627D DE872387C (en) | 1942-11-07 | 1942-11-07 | Electrolyte for electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES19627D DE872387C (en) | 1942-11-07 | 1942-11-07 | Electrolyte for electrolytic capacitors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE872387C true DE872387C (en) | 1953-03-30 |
Family
ID=7475896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES19627D Expired DE872387C (en) | 1942-11-07 | 1942-11-07 | Electrolyte for electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE872387C (en) |
-
1942
- 1942-11-07 DE DES19627D patent/DE872387C/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE872387C (en) | Electrolyte for electrolytic capacitors | |
| DE2118435A1 (en) | ||
| DE925330C (en) | Process for the electrolytic etching of tantalum | |
| DE686131C (en) | Process for anodic polishing of metals, in particular steel | |
| DE2611474A1 (en) | METHOD OF MANUFACTURING AN ELECTROLYTE CONDENSER WITH A TANTALUM ANODE | |
| DE557081C (en) | Process for rendering harmless ª ‰, ª ‰ '- dichlorodiaethyl sulfide | |
| DE757349C (en) | Electrolyte with additive to keep the viscosity or the power factor constant for electrolytic capacitors | |
| DE2129395A1 (en) | Measuring electrode for choline and its esters | |
| DE736838C (en) | Electrolyte, especially for electrolytic capacitors | |
| DE1614166C2 (en) | Electrolytic capacitor | |
| Nedswedski | Fermentative Estersynthese des Cholesterins. | |
| DE758425C (en) | Method of manufacturing an electrolytic capacitor | |
| DE767900C (en) | Electrolyte for electrolytic capacitors | |
| DE609488C (en) | Process for the production of smudge-proof and weather-proof paints | |
| DE431369C (en) | Manufacture of dye inks | |
| DE602333C (en) | Electrolytic capacitor with pasty electrolyte | |
| AT141625B (en) | Electrolyte, in particular for electrolytic capacitors. | |
| AT160742B (en) | Electrolytic capacitor. | |
| DE488638C (en) | Process for the production of disinfecting agents suitable for pest control | |
| DE963537C (en) | Electrolytic capacitor with artificially enlarged electrode surface | |
| DE706979C (en) | Process for the production of an electrolyte for an electrolytic capacitor | |
| DE722289C (en) | Method for monitoring the saponification and neutralization process in the manufacture of soaps | |
| DE609703C (en) | Electrolytic capacitor, the electrolyte of which consists of a solution of at least one of the primary and / or secondary phosphates in an alcohol | |
| DE870459C (en) | Process for the production of an electrolyte for solid electrolytic capacitors | |
| DE885753C (en) | Process for the production of an electrolyte, in particular for electrolytic capacitors |