15 results about "Ammonium adipate" patented technology

The invention discloses a special aluminum fixing capacitor for an electronic detonator with ultralow electric leakage characteristic and a preparation method thereof, the capacitor comprises a positive foil electrode, a negative foil electrode, an aluminum foil or an aluminum alloy foil coated with an oxide film on the surface, electrolytic paper and an electrolyte, and the electrolyte can be a phosphate-based electrolyte, a borate-based electrolyte or an organic electrolyte containing high-conductivity salt, and an additive, the preparation method comprises the following steps: slitting positive and negative foils and electrolytic paper, winding the positive and negative foils and the electrolytic paper to form a concentric circle, forming a repair oxide film, dipping a conductive polymer material, baking and polymerizing to form a conductive film, injecting a pouring sealant into an aluminum shell, and carrying out heat treatment to obtain the conductive aluminum shell. The formation liquid is ammonium dihydrogen phosphate, ammonium adipate or boric acid aqueous solution, and the pouring sealant is epoxy resin or polyurethane; the capacitor has an ultra-low electric leakage characteristic, is suitable for being used as a power supply energy storage element in an electronic detonator system, stabilizes power supply output and inhibits an electric leakage phenomenon.

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.

The present invention relates to a phosphorus-free low-voltage electrolyte and a preparation method thereof. The phosphorus-free low-voltage electrolyte comprises the following raw materials in parts by weight: 9-15 parts of ethylene glycol, 13-18 parts of ammonium adipate, 0.5-3 parts of ammonium p-nitrobenzoate, 1-3 parts of citric acid, 1-3 parts of ammonium formate, 0.4-8 parts of p-tert-butylcatechol, and 62-68 parts of water. The present invention prepares a phosphorus-free low-voltage electrolyte by combining p-tert-butylcatechol with raw materials such as ethylene glycol, ammonium adipate, ammonium p-nitrobenzoate, citric acid, and ammonium formate. p-tert-butylcatechol can effectively play an anti-corrosion role in a high-water-content electrolyte and can reduce environmental pollution; the prepared phosphorus-free low-voltage electrolyte is a dephosphorized product, is environmentally friendly, and has the advantages of long service life and good use performance. The preparation method of the phosphorus-free low-voltage electrolyte has a simple process, is convenient to operate, has high production efficiency, and the prepared phosphorus-free low-voltage electrolyte product has stable quality, which is conducive to industrial production.

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 discloses a low-temperature paraffin remover for paraffin with high carbon number, which belongs to the field of paraffin removers and comprises the following components in parts by weight: 70-80 parts of a first solvent and a second solvent; 3-13 parts of a penetrating agent and 1-10 parts of a dispersing agent; 1-7 parts of an inhibitor; the first solvent is one of S1000, S1200, S1500, S1800, S2000, S2600, D40, D60, D80 and 1-ethyl-3-methylimidazolium tetrafluoroborate, and the second solvent is one of 1-ethyl-3-methylimidazolium tetrafluoroborate and 1-ethyl-3-methylimidazolium tetrafluoroborate; the second solvent is one or a mixture of more of petroleum ether 60 # to 90 #, petroleum ether 90 # to 120 #, petroleum ether 150 #, petroleum ether 200 #, n-heptane, dodecane, isododecane, nonane, 2-methyl-3-ethylpentane, 3-methylhexane, ethanol, acetone, dimethyl sulfoxide and tetrahydrofuran; and the penetrating agent is one of n-amyl alcohol, isoamyl alcohol, n-caprylic alcohol, hexanediol and ammonium adipate.

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 provides a formation method of an electrode foil for an aluminum electrolytic capacitor of a photovoltaic inverter, which comprises the following steps of: preparing a composite formation liquid from two or more substances such as ammonium adipate, ammonium formate, hypophosphite, citric acid, maleic acid or fumaric acid in the preceding-stage formation, and preparing a composite formation liquid from boric acid, azelaic acid and salts thereof in the final-stage formation, the composite formation liquid has very high oxidation efficiency, and has the characteristics of inhibiting the reaction between the surface of aluminum oxide and water, dissolving a feather-shaped layer of a hydration film on the surface of aluminum foil, enhancing the compactness of the oxidation film, improving the voltage resistance of the oxidation film in unit thickness, reducing leakage current, improving the hydration resistance and the like. And the anode foil oxide film prepared by performing multi-stage depolarization after formation has the characteristics of high voltage, high ripple resistance, long service life and the like, and can meet the requirements of an electrode foil for an aluminum electrolytic capacitor of a photovoltaic inverter.

The invention discloses a formed foil for an aluminum electrolytic capacitor and a production process thereof, and relates to the technical field of formed foil production.The production process comprises the steps that a corroded aluminum foil is unreeled, a leading foil serves as an auxiliary electrode to be connected in, first-stage electrolytic oxidation is conducted after steam, boiling water and water washing are conducted, second-stage electrolytic oxidation is conducted after water washing, and the formed foil is obtained. Adding a phosphoric acid solution for reaction after washing, carrying out three-section electrolytic oxidation, adding an ammonium adipate solution into a feed tank after washing, adding pure water for washing after reaction, carrying out roasting and phosphoric acid solution treatment, carrying out four-section electrolytic oxidation, carrying out third roasting, washing and post-treatment after washing, and drying, rolling and warehousing the prepared formed foil. According to the invention, the formed foil is prepared by designing a four-section method, so that the function of gradient adjustment of electrolysis parameters is realized, the problems of oxide film structure defects, electrical property degradation and process stability reduction caused by fixed voltage or simple segmentation are solved, and the compactness and voltage resistance of the oxide film can be optimized.

The present invention belongs to the technical field of capacitor preparation, and specifically relates to a solid aluminum electrolytic capacitor and a preparation method thereof. The preparation method of the solid aluminum electrolytic capacitor provided by the present invention comprises the following steps: S1 uses electrolytic paper to isolate between the anode foil and the cathode foil and winds them into a core package; S2 welds the core package on the iron bar; S3 immerses the core package welded in step S2 into a chemical forming liquid for chemical forming treatment, and performs drying treatment after chemical forming; S4 immerses the core package dried in step S3 in a pretreatment agent, takes it out and dries it, and then undergoes impregnation treatment and subsequent treatment to obtain the solid aluminum electrolytic capacitor; the chemical forming liquid in step S3 is an aqueous solution containing ammonium adipate, diammonium dihydrogen phosphate, phosphoric acid and malic acid. The method provided by the present invention can effectively improve the consistency of the capacity, ESR, and leakage current of the solid aluminum electrolytic capacitor, improve the consistency of the product's electrical performance, and extend the service life of the solid aluminum electrolytic capacitor product.

The invention discloses a process for recovering ammonium adipate through combination of reverse osmosis and membrane distillation. The process comprises the following steps of alkalization impurity removal, nanofiltration impurity removal, reverse osmosis recovery and nanofiltration concentrated liquid recovery. According to the method, high-purity recovery of the feed medium ammonium adipate can be realized, so that the problem that chlorine-containing waste ammonium adipate cannot be recycled to a production line is solved, resource waste is reduced, the production cost is reduced, and total nitrogen in sewage is reduced; the raw materials except the ammonia water are all from a production line, no new impurities are introduced in the recovery process, the recovery cost is low, the raw materials are easy to obtain, and large-scale popularization and application are easy.

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.

The invention relates to a non-phosphorus low-voltage electrolyte and a preparation method thereof. The non-phosphorus low-voltage electrolyte is prepared from the following raw materials in parts by weight: 9 to 15 parts of ethylene glycol, 13 to 18 parts of ammonium adipate, 0.5 to 3 parts of ammonium p-nitrobenzoate, 1 to 3 parts of citric acid, 1 to 3 parts of ammonium formate, 0.4 to 8 parts of p-tert-butylcatechol and 62 to 68 parts of water. The non-phosphorus low-voltage electrolyte is prepared by matching the p-tert-butylcatechol with the ethylene glycol, the ammonium adipate, the ammonium p-nitrobenzoate, the citric acid, the ammonium formate and other raw materials, and the p-tert-butylcatechol can effectively play a role in corrosion prevention in the high-water-content electrolyte and can reduce pollution to the environment; the prepared non-phosphorus low-voltage electrolyte is a dephosphorization product, is environment-friendly, and has the advantages of long service life and good use performance. The preparation method of the non-phosphorus low-voltage electrolyte is simple in process, convenient to operate and high in production efficiency, the prepared non-phosphorus low-voltage electrolyte product is stable in quality, and industrial production is facilitated.

The invention belongs to the field of chemical engineering, and particularly relates to a preparation method of sodium adipate. Comprising the following steps: (1) adding a proper amount of sodium hydroxide into the ammonium adipate formation waste liquid, stirring at 25 + / -5 DEG C, and fully reacting until trivalent aluminum ions are converted into aluminum hydroxide precipitates; (2) drying and calcining aluminum hydroxide precipitate obtained by filtering the material obtained in the step (1) to obtain alumina powder; (3) filtering the filtrate obtained in the step (2) through a nanofiltration membrane to remove chloride ions; (4) heating and evaporating the filtrate obtained in the step (3), condensing steam to obtain ammonia water, and taking the residual filtrate as a sodium adipate solution; and (5) drying the sodium adipate solution obtained in the step (4) to obtain a sodium adipate solid. The invention provides the method for preparing sodium adipate by using the ammonium adipate formation waste liquid for the electrolytic capacitor low-voltage formation industry, aluminum hydroxide, aluminum oxide and ammonia water products are obtained at the same time, and the method is simple, feasible, safe, environment-friendly, low in cost and remarkable in social and economic benefits.

The application discloses a high-ripple-current aluminum electrolytic capacitor and a preparation method thereof. The capacitor comprises a core package and a shell, the core package is adsorbed with electrolyte, the electrolyte comprises a solvent, a solute and an additive, the solvent accounts for 40-60% of the total mass of the electrolyte, the solute accounts for 30-50%, and the additive accounts for 3-10%; the additive is composed of ammonium adipate, ammonium pentaborate, tetraethylphosphonium tetrafluoroborate, nano silicon dioxide, p-nitrophenyl ether and tetraethylammonium; the solvent comprises gamma-butyrolactone, sulfolane, ethylene carbonate, diethylene glycol methyl ether and 3-methoxypropionitrile; and the solute comprises ammonium sebacate, dodecyl diacid, tetramethylammonium and multi-branched ammonium salt of dicarboxylic acid. The aluminum electrolytic capacitor prepared by the application is suitable for high-frequency switching scenarios of silicon carbide and gallium nitride server power supplies, and has high-ripple-current bearing capacity and long high-temperature life.