5 results about "Ammonium adipate" patented technology

The invention provides a surface treatment method of a CVD (chemical vapor deposition) gas diffuser. The surface treatment method comprises the following steps: S1, shielding; s2, washing with water after degreasing treatment; s3, washing after alkali etching, washing with water after acid pickling, and flushing; s4, anodic oxidation is conducted, oxidation liquid medicine comprises ammonium adipate accounting for 1%-15% of the volume of an anodic oxidation tank, an auxiliary agent accounting for 60%-90% of the volume of the anodic oxidation tank and the balance pure water, the auxiliary agent comprises diethylene glycol, the set voltage is 300-480 V, the climbing time is 1-10 min, the holding time is 3-10 min, and the temperature is 45-60 DEG C; s5, blow-drying after cleaning; and S6, placing in a high-temperature and high-pressure steam cavity for hydration reaction, setting the pressure to be 0.2-0.4 MPa, the temperature to be 100-170 DEG C, the humidity to be 50-100% RH and the reaction time to be 1-2 hours, taking out after the reaction is finished, and cooling to room temperature. The average corrosion resistance time of the oxidation film obtained through the method in a hydrochloric acid aqueous solution with the mass fraction of 5% reaches 2600 seconds or above, and in addition, the corrosion resistance improvement rate which can be achieved in the prior art can be broken through through the arrangement of hydration reaction conditions.

This disclosure provides aluminum foil and a method for forming the same. The method includes: performing a multi-stage formation process on the aluminum foil, the multi-stage formation process including three to eight stages; wherein, for aluminum foil with a target formation withstand voltage greater than or equal to 145V and less than or equal to 185V, a first mixture of ammonium adipate and ammonium dihydrogen phosphate is used in the first stage of formation; for aluminum foil with a target formation withstand voltage greater than or equal to 105V and less than 145V, a second mixture of ammonium adipate and ammonium dihydrogen phosphate is used in the second stage of formation; for aluminum foil with a target formation withstand voltage greater than or equal to 65V and less than 105V, a third mixture of ammonium adipate and ammonium dihydrogen phosphate is used in the third stage of formation. By introducing ammonium dihydrogen phosphate in advance during the main formation stage for aluminum foils with different target formation withstand voltage ranges, and utilizing its electrochemical behavior at specific formation stages, the density and chemical stability of the oxide film are optimized, significantly improving the hydration resistance of the aluminum foil.

The invention provides an aluminum electrolytic capacitor and a preparation method and application thereof. The aluminum electrolytic capacitor comprises a shell with an opening and a core, a guide pin is arranged on the core, a rubber plug is arranged at the opening of the shell, the core penetrates through the rubber plug and is accommodated in the shell, and a sleeve is arranged outside the shell; the core comprises a cathode aluminum foil, an anode aluminum foil, inner-layer electrolytic paper and outer-layer electrolytic paper; the guide pins comprise a cathode guide pin and an anode guide pin; the cathode aluminum foil is provided with a cathode guide pin, the anode aluminum foil is provided with an anode guide pin, and the inner-layer electrolytic paper and the outer-layer electrolytic paper are coated with electrolyte; the electrolyte comprises the following components in percentage by weight: 60%-70% of ethylene glycol, 20%-30% of gamma-butyrolactone, 1%-5% of dimethylformamide, 5%-10% of ammonium adipate, 3%-5% of ammonium sebacate, 1%-2% of boric acid, 0.5%-1% of ammonium dihydrogen phosphate, 0.1%-0.3% of nitrobenzoic acid, 0.05%-0.1% of ammonium molybdate, 0.2%-0.5% of polyvinylpyrrolidone and 0.05%-0.1% of hydroquinone; the aluminum electrolytic capacitor can still work normally for a long time at the ultralow temperature of 450V and the temperature of-55 DEG C, the low-temperature capacity attenuation at the temperature of-55 DEG C can be as low as-14.50%, and the low-temperature impedance ratio at the temperature of-55 DEG C can reach 1.28.

The invention provides an aluminum foil and a forming method thereof, and the method comprises the steps: carrying out a multi-stage formation process on the aluminum foil, and the multi-stage formation process comprises three to eight stages of formation processes; wherein a first mixed solution of ammonium adipate and ammonium dihydrogen phosphate is adopted in the first-stage formation for the aluminum foil with the target formation withstand voltage larger than or equal to 145 V and smaller than or equal to 185 V; a second mixed solution of ammonium adipate and ammonium dihydrogen phosphate is adopted in the second-stage formation of the aluminum foil with the target formation withstand voltage larger than or equal to 105 V and smaller than 145 V; and a third mixed solution of ammonium adipate and ammonium dihydrogen phosphate is adopted in the third-stage formation for the aluminum foil of which the target formation withstand voltage is greater than or equal to 65V and less than 105V. Aiming at aluminum foils of different target formation pressure-resistant sections, ammonium dihydrogen phosphate is introduced in advance in a main formation stage, and the compactness and chemical stability of an oxidation film are optimized by utilizing the electrochemical behavior of the ammonium dihydrogen phosphate in a specific formation stage, so that the hydration resistance of the aluminum foils is remarkably improved.

The invention relates to the technical field of chemical synthesis, in particular to a preparation method of ammonium adipate. The method comprises the following steps: dissolving adipic acid in a solvent to form an adipic acid solution, introducing ammonia gas into the adipic acid solution, heating, and reacting to generate crude ammonium adipate slurry; adding a mixed auxiliary coolant composed of hydrogen peroxide and ethanol into the ammonium adipate crude product slurry, and uniformly stirring to obtain a mixed slurry; the mixed slurry is cooled and crystallized, solid-liquid separation is performed after crystals are separated out, and solids are ammonium adipate wet bases; drying the wet base to obtain a finished product. By adding a mixed auxiliary coolant in a cooling crystallization link, the polarity of the solution is changed, the solubility of ammonium adipate is reduced, and crystallization is promoted to form crystals with larger particle sizes; the strong volatility of the mixed auxiliary coolant can accelerate drying, shorten time, avoid cracking of crystals during drying, increase the proportion of large-particle-size crystals, prolong the anti-caking period of the product, provide convenience for subsequent feeding and dissolving, and is suitable for industrial production.