Abstract: An electrolyte for an electrolytic capacitor is disclosed, containing a carboxylic acid salt of a cationic nitrogen-containing heterocyclic compound as solute within an aprotic solvent or a mixed solvent comprising major aprotic solvent and minor polyol solvent.

Abstract: An electrolyte for electrolytic capacitors containing within an aprotic solvent a hexafluorophosphate of an organic amine compound as solute; wherein said organic amine compound is a compound containing one or two pyridine rings; or a primary, secondary or tertiary amine.

Abstract: A liquid electrolyte for use in an electrolytic capacitor is disclosed, wherein a mixture of .gamma.-butyrolactone and acetonitrile is used as a solvent system, said mixed solvent containing as a solute at least one member selected from among monocarboxylic and dicarboxylic acid salts of tetraalkylammonium.

Abstract: An electrolyte for an electrolytic capacitor is disclosed containing an alkyl quarternary ammonium salt of phenol or nitrophenols as solute within an aprotic solvent. The electrolyte exhibits high conductivity while eliminating the drawbacks associated with the presence of water.

Abstract: An electrolyte for electrolytic capacitor containing within an aprotic solvent a fluorocomplex acid salt of aniline or aniline derivative as solute.An electrolyte for electrolytic capacitor according to the invention may conveniently be prepared by adding one equivalent amount of aniline or aniline derivative to an aqueous solution of fluorocomplex acid for reaction with subsequent vacuum drying to obtain an anhydrous salt and then dissolving said anhydrous salt to an aprotic solvent until a desired conductivity is obtained, for example, as an approximately 10% by weight solution.

Abstract: An electrolyte for an electrolytic capacitor is disclosed containing a fluoro-complex acid salt of an alkylene bisamine compound as solute within an aprotic solvent. The electrolyte exhibits high conductivity while eliminating the drawbacks associated with the presence of water.

Abstract: An electrolyte for an electrolytic capacitor is disclosed containing a fluorocomplex acid salt of morpholine or a morpholine derivative as solute within an aprotic solvent. The electrolyte exhibits high conductivity while eliminating the undesirable side effects caused by the presence of water.

Abstract: An electrolyte for an electrolytic capacitor is disclosed containing an alkyl quarternary ammonium salt of an enolform of a 1,3-cyclodiketone compound as solute within an aprotic solvent. The electrolyte exhibits high conductivity while eliminating the drawbacks associated with the presence of water.

Abstract: An electrolyte for an electrolytic capacitor is disclosed containing an alkyl quarternary ammino salt of an aliphatic saturated monocarboxylic acid as solute within an aprotic solvent. The electrolyte exhibits high conductivity while eliminating the drawbacks associated with the presence of water.

Abstract: An electrolyte for an electrolytic capacitor is disclosed containing a fluorocomplex acid salt of piperazine or piperazine derivatives as solute within an aprotic solvent. The electrolyte exhibits high conductivity while eliminating the undesirable side effects caused by the presence of water.

Abstract: An electrolyte for an electrolytic capacitor is disclosed containing an alkyl quarternary ammonium salt of an enol-form of 1,3-diketone compound as solute within an aprotic solvent. The electrolyte exhibits high conductivity while eliminating the drawbacks associated with the presence of water.

Abstract: An electrolyte for an electrolytic capacitor is disclosed containing a fluorocomplex acid salt of imidazole or an imidazole derivative as solute within an aprotic solvent. The electrolyte exhibits high conductivity while eliminating the undesirable side effects caused by the presence of water.

Abstract: An electrolyte for electrolytic capacitor containing within an aprotic solvent a fluorocomplex acid salt of a N-heterocyclic compound as solute.An electrolyte for electrolytic capacitor according to the invention may conveniently be prepared by adding to an aqueous solution of fluorocomplex acid salt an equivalent amount of N-heterocyclic compound for reaction with subsequent dryness at reduced pressure to obtain an anhydrous salt which is then added to the aprotic solvent to prepare the resultant electrolyte having desired conductivity.

Abstract: An electrolyte for electrolytic capacitor containing within an aprotic solvent a tetrafluoroboric acid salt of a pyrylium or thiopyrylium compound as solute.An electrolyte for electrolytic capacitor according to the invention may conveniently be prepared by dissolving a tetrafluoroboric acid salt of a pyrylium or thiopyrylium compound to an aprotic solvent until a desired conductivity is obtained, for example, as an approximately 10% by weight solution.

Abstract: An electrolyte for electrolytic capacitor containing within an aprotic solvent a hexafluorophosphate of a tetraalkyl ammonium cation, a diazonium cation or a triarylcarbonyl cation.

Abstract: An electrolyte for electrolytic capacitor containing within an aprotic solvent a tetrafluoroborate of an organic amine compound as solute.An electrolyte for electrolytic capacitors according to the invention may conveniently be prepared by adding to an aqueous solution of tetrafluoroborate an equivalent amount of organic amine compound for reaction with subsequent reduction and dryness to obtain an anhydrous salt which as an approximately 10% by weight solution is then added to the aprotic solvent to prepare the resultant electrolyte.