30results about How to "Not easy to restore" patented technology

The invention relates to the technical field of inorganic synthesis, and discloses a preparation method of a trivalent rhodium acetate trimer, comprising the following steps: (1) mixing rhodium powder and potassium chloride, and then introducing chlorine gas for reaction; (2) mixing The product obtained in step (1) is dissolved in water, filtered, potassium hydroxide is added to the filtrate for reaction, and rhodium hydroxide is obtained after filtering and washing; (3) water, nitric acid and glacial acetic acid are added to rhodium hydroxide Carry out the reaction, evaporate the solution to dryness after the reaction is completed, use glacial acetic acid to remove the nitrate, and then use water to remove the acid to obtain trivalent rhodium acetate trimer. The invention adopts nitric acid and glacial acetic acid to dissolve rhodium hydroxide, and then uses glacial acetic acid to catch up with the nitric acid, so that the reaction speed can be obviously accelerated, thereby increasing the yield of trivalent rhodium acetate trimer.

The invention relates to the electrical energy storage field, and concretely relates to a lead storage battery regeneration apparatus and a regeneration method thereof. The apparatus adopts a resistance-variable resistance wire provided with an indicating lamp, and the resistance can be changed as needed to completely discharge a lead battery and can effectively avoid the generation of large granule lead sulfate caused by difficult reduction of large granule lead dioxide to lead sulfate due to small discharge current in the later stage of discharge; and the discharge depth can be momentarily observed through the indicating lamp to effectively avoid the sulfate formation of the lead battery and greatly prolong the life of the processed lead battery. The lead storage battery regeneration method has the advantages of non-strict operating conditions, simplicity, use convenience, and realization of good regeneration ability and multiplied service life of the processed lead battery.

The invention provides a sound leakage protection system based on the sound masking principle. The system comprises a sound monitoring unit, a sound disturbing unit and a center control management unit. The invention further provides a sound leakage protection method based on the sound masking principle. The method comprises steps as follows: the sound monitoring unit is adopted to collect a sound signal, and A-weighting sound pressure level intensity is obtained; whether the sound signal is a voice signal is judged, if the sound signal is the voice signal and the A-weighting sound pressure level intensity exceeds a preset threshold value in a period, a warning signal is emitted; the center control management unit performs analysis and feature extraction on the voice signal, generates a disturbing signal and sends the disturbing signal to the sound disturbing unit; the sound disturbing unit adopts the disturbing signal to perform sound disturbing on each area. According to the method and the system, a masking signal processed in real time has higher relevance with a target voice, the masking effect is better, and general privacy can be protected better.

The invention discloses an alkane dehydrogenation exothermic additive, its preparation method and application, mainly composed of CaO, CuO and Al 2 o 3 Prepared, CaO, CuO and Al 2 o 3 The parts by weight are: 35-90 parts, 10-40 parts and 5-40 parts; the Cu element in the alkane dehydrogenation heating aid is mainly CaCu 2 o 3 and Ca 2 CuO 3 The form exists, and the ratio of the number of Ca atoms to the number of Al atoms is ≥ 6 / 7; the alkane dehydrogenation heating aid does not contain an alumina phase; alumina and calcium oxide are converted into high-calcium aluminate calcium aluminate (Ca / Al atomic number ratio Greater than or equal to 6 / 7), it can avoid the reaction of CuO and alumina to produce aluminum-copper spinel, and use high-calcium calcium aluminate as the skeleton to avoid the adhesion phenomenon that occurs when the carrier is sintered under conditions.

A preparation method of a large-size and fine-grain molybdenum tantalum alloy sputtering target material comprises steps of cold isostatic pressing molding through combination of a steel mold with a rubber plate, sintering, levelling and reshaping, hot isostatic pressing treatment, rolling and machining. The grain size of the produced target material is smaller than 50 microns, the change of the grain size is maintained within 20%, and grains are evenly distributed in the plane direction and the thickness direction of the target material; the relative density of the target material is higher than 97%; besides, the large-size sputtering target material with the length being about 2 m and the width being about 1.3 m can be produced.

The application provides a lithium-ion battery, a preparation method and an electric vehicle, the lithium-ion battery includes a positive electrode, a negative electrode, and a composite solid electrolyte layer between the positive electrode and the negative electrode, and the composite solid electrolyte layer includes a positive electrode side solid electrolyte layer , the negative electrode side solid electrolyte layer and the intermediate layer solid electrolyte layer sandwiched between the positive electrode side solid electrolyte layer and the negative electrode side solid electrolyte layer; the positive electrode side solid electrolyte layer, the negative electrode side solid electrolyte layer and the intermediate layer solid electrolyte Each layer contains a first inorganic solid electrolyte, and the intermediate solid electrolyte layer also includes a second inorganic solid electrolyte. The composite solid electrolyte can delay the problem of lithium dendrites penetrating through the electrolyte layer and cause micro-short circuits inside the battery, and can avoid electrolyte The layer is reduced and failed by lithium dendrites, which greatly improves the cycle performance and safety performance of the entire battery.

The invention discloses an environment-friendly energy-saving high-conversion-ratio rare-earth catalyst and a preparation method thereof. The environment-friendly energy-saving high-conversion-ratio rare-earth catalyst is prepared from the following raw materials in percentage by mass: 0.01-10% of a lanthanum-containing compound, 0.01-10% of a cerium-containing compound, 0.01-10% of a neodymium-containing compound, 0.01-10% of a praseodymium-containing compound, 3-15% of V2O5, 1-3% of thiosulfate, 1-15% of a caesium-containing compound, 1-5% of a surfactant, 1-5% of an organic high-molecular compound, 1-30% of hydroxide, 5-30% of diluted sulphuric acid, 0.1-10% of anhydrous sodium sulphate, 0.1-7% of phosphoric acid, 1-15% of sulfur and the balance of diatomite. The material components cooperatively act, so that the stability of the catalyst is improved, and the service life of the catalyst is remarkably prolonged, and an ignition temperature is remarkably reduced.