34 results about "Dodecanedioate" patented technology

The invention discloses a method for obtaining high-purity diisooctyl dodecanedioate base oil by synthesizing solid superacid SO4<2-> / ZrO2-TiO2 catalyst with a precipitation-impregnation method, catalytically synthesizing diisooctyl dodecanedioate by dodecanedioic acid and isooctanol, and subjecting to separation and purification. The synthesized catalyst has the advantages of high activity, easiness in separation, capacity of recycling, good stability, high product yield and the like. The synthesized ester base oil has the advantages of high viscosity index and open cup flash point, low pour point and toxicity, good low temperature fluidity, wider operating temperature range, and excellent lubrication, environmental protection and biodegradation properties.

The invention relates to the technical field of pharmaceutical and chemical industry, in particular to a preparation method of 1,12-dihydroxydodecane. The preparation method of 1,12-dihydroxydodecanecomprises the steps that dodecanedioic acid is adopted to be subjected to an esterification reaction with n-hexanol, dihexyl dodecanedioate is obtained, and the target product 1,12-dihydroxydodecane is prepared through hydrogenation reduction. The method can be implemented without a catalyst, the separation step of the catalyst is reduced, so that esterification can be realized, the production steps are reduced, and the production cost is reduced.

In order to overcome the problem that sparking voltage and conductivity are not high enough in the prior art, the invention provides a high-voltage high-conductivity electrolytic solution for an aluminum electrolytic capacitor. The electrolytic solution comprises 40%-60% of a main solvent, 15%-30% of a main solute, 9%-15% of an auxiliary solvent, 4%-7% of an auxiliary solute, 5%-10% of a sparkingimprover and 0.2%-0.5% of a hydrogen elimination agent, wherein the main solute is long-chain dicarboxylic acid containing 22-24 carbon atoms with branched chains or ammonium dicarboxylate; the auxiliary solute is selected from azelaic acid or azelate, sebacic acid or sebacate, dodecanedioic acid or dodecanedioate, dicarboxylic acid containing 16-18 carbon atoms with branched chains or dicarboxylate and inorganic acid or inorganic acid salt; and the sparking improver is selected from a glycol dispersion liquid containing nano-silicon and also contains polyvinyl alcohol borate, polyvinyl alcohol with the polymerization degree of 300-3,000, polyglycerol with the polymerization degree of 300-3,500, polypropylene glycol with the polymerization degree of 500-2,500, a silane coupling agent, polypropylene oxide ether and polyfatty acid or ammonium salt thereof. The high-voltage high-conductivity electrolytic solution for the aluminum electrolytic capacitor is high in sparking voltage which can reach 580V or above, and the conductivity is improved by 20%-40% compared with an existing electrolytic solution.

The invention relates to the technical field of capacitor electrolyte, and discloses a middle-high voltage aluminum electrolytic capacitor electrolyte. The middle-high voltage aluminum electrolytic capacitor electrolyte comprises the raw materials in percentages by weight as follows: 10-20% by weight of main electrolyte, 5-10% by weight of auxiliary electrolyte, 3-6% by weight of multi-polar-radical high polymer, 26-38% by weight of sorbitol, 27-38% by weight of diethylene glycol, 3-6% by weight of a hydrogen elimination agent, and 3-5% by weight of an additive agent, wherein the main electrolyte is ammonium dodecanedioate; the auxiliary electrolyte is sulphamic acid. According to the invention, the ammonium dodecanedioate serves as the main electrolyte, the sulphamic acid serves as the auxiliary electrolyte, and the multi-polar-radical high polymer is added at the same time, so that the middle-high voltage aluminum electrolytic capacitor electrolyte can work stably at 105 DEG C and 500-800 V for 1000 hours without any current leakage phenomenon, meets with the basic demands of a flash fire voltage and achieves a small specific resistance. The middle-high voltage aluminum electrolytic capacitor electrolyte disclosed by the invention is strong in oxidization forming capability, high-voltage resistant, good in high-temperature resistance, low in loss and long in service life.

The invention discloses an electrolyte solution for an electrolytic condenser. The electrolyte solution for the electrolytic condenser comprises 86-87 parts of ethylene glycol, 3.2-3.5 parts of sebacic acid, 0.5-0.6 part of ammonium dodecanedioate, 0.1-0.13 part of p-nitrobenzoic acid, 0.15-0.17 part of hypophosphorous acid, 1-1.2 parts of trinitrophenol, 1-1.5 parts of polyethylene glycol and 2-2.4 parts of boric acid. According to the electrolyte solution for the electrolytic condenser, the sparking voltage is 420-440V, the conductivity at 40 DEG C is (2.4-2.7)*10-3S / cm, high temperature resistance and long service life can be achieved, more than 2500 hours can last in a 125 DEG C life test, the capacitance change rate is smaller than 0.3%, and the leakage current is 5-6 muA.

The present invention relates to the technical field of electrolytes, in particular to a high-conductivity and high-sparking electrolyte for an aluminum electrolytic capacitor and a preparation method therefor. The electrolyte comprises the following raw materials in parts by weight: 4.5-6.5 parts of ammonium sebacate, 1.5-2.5 parts of ammonium hydrogen azelate, 1.5-2.5 parts of ammonium pentaborate, 13-17 parts of a sparking boosting agent, 1.5-2.5 parts of ammonium dodecanedioate, 0.2-0.3 part of ammonium hypophosphite, 0.3-0.7 part of p-nitrobenzyl alcohol and 60-85 parts of glycol. The electrolyte is prepared by means of interaction among the raw materials and by strictly controlling a weight proportion of the raw materials; the sparking voltage of the prepared electrolyte can reach 490 V and the conductivity rate of the prepared electrolyte can reach 2.4 ms / cm; and the electrolyte has good electrochemical properties, has the advantages of high conductivity and high sparking voltage, and can be applied to manufacturing of the aluminum electrolytic capacitors.

The invention discloses an electrolyte, an electrolyte preparation method and an aluminum electrolytic capacitor. The electrolyte comprises, by weight percentage, 50-65w% of solvent, 23-33w% of solute, and 8-19w% of additive. The solute includes boric acid, ammonium benzoate, at least one material selected from ammonium dodecanedioate and 2,7-dibutyl octanedioic acid ammonium, and at least one material selected from ammonium sebate and alkyl ammonium sebate. Through the technical scheme, the temperature resistance performance and stability of the aluminum electrolytic capacitor are improved.

The present invention relates to the technical field of electrolytes, in particular to a high-sparking and anti-lightning electrolyte for an aluminum electrolytic capacitor and a preparation method therefor. The electrolyte comprises the following raw materials in parts by weight: 1.5-2.5 parts of ammonium dodecanedioate, 0.8-1.2 parts of ammonium sebacate, 5-9 parts of sorbitol, 4-6 parts of boracic acid, 4-6 parts of diethylene glycol monobutyl ether, 1-2 parts of polyvinyl alcohol, 0.4-0.6 part of p-nitrobenzyl alcohol, 0.1-0.3 part of ammonium hypophosphite, 6-10 parts of ethylene glycol nano silica sol and 60-80 parts of glycol. The electrolyte is prepared by means of interaction among the raw materials and by strictly controlling a weight proportion of the raw materials; the sparking voltage of the prepared electrolyte can reach 590 V and the conductivity rate of the prepared electrolyte can reach 0.5 ms / cm; and the electrolyte has good electrochemical properties, has the advantages of high sparking voltage, lightning resistance and the like, and can be applied to manufacturing of the aluminum electrolytic capacitors.

The application relates to the technical field of medicine and chemical industry, in particular to a preparation method of 1,12-dodecanediol. A preparation method of 1,12-dodecanediol, which adopts the esterification reaction of dodecanedioic acid and n-hexanol to obtain dihexyl dodecanedioate, and then prepares the target product 1 by hydrogenation reduction, 12‑Dodecanediol. The method does not need a catalyst, reduces catalyst separation steps, realizes esterification, reduces production steps, and reduces production costs.