8results about How to "Reduce decomposition rate" patented technology

This invention belongs to the field of wet electronic chemicals technology, specifically relating to a method for preparing electronic-grade hydrogen peroxide. The method includes the following steps: adjusting the concentration of raw hydrogen peroxide, and then filtering it sequentially through a reverse osmosis membrane, a modified cation exchange resin, an anion exchange resin, and a mixed ion exchange resin to obtain electronic-grade hydrogen peroxide. The modified cation exchange resin used is modified based on conventional cation exchange resin through pore expansion and grafting, optimizing the spatial matching of pore structure and functional sites. This achieves passivation of metal ions, enhanced adsorption capacity, and improved oxidation resistance, as well as a deep synergistic effect of these three effects. Ultimately, it achieves the dual goals of efficient purification and stable operation of the resin in the hydrogen peroxide system. The resulting electronic-grade hydrogen peroxide can reduce the content of single impurity metal ions to below 5 ppt, meeting the requirements of SEMI G5 standards, and can be directly applied to high-end manufacturing fields such as semiconductor wafer cleaning.

The invention relates to the technical field of semiconductors, and discloses a method for stripping a substrate wafer, which comprises the following steps of: forming a first metal layer on the surface of a gallium nitride layer opposite to the substrate wafer, and forming a second metal layer on the surface of a support wafer; correspondingly contacting and bonding the first metal layer and the second metal layer together to form a bonded wafer; performing a first heating process; a laser scanning process is carried out on the surface of one side of the substrate wafer of the bonded wafer along a laser scanning path from the edge to the center by adopting a laser, so that the substrate wafer is separated from the gallium nitride layer; the temperature of the bonded wafer is gradually reduced from the edge to the center in the process; a laser scanning path on the surface of the substrate wafer is a spiral line from the edge to the center; and along a laser scanning path, from the edge to the center, the laser energy density, the laser scanning linear speed and the decomposition rate of the gallium nitride layer are gradually reduced, and the distances between adjacent light spots are the same. According to the invention, the yield of the gallium nitride layer after the laser lift-off process can be improved, and the fracture risk of the substrate wafer is reduced.

The invention discloses a ceramic bearing device for thin glass processing and a ceramic supporting strip preparation method, the ceramic bearing device for thin glass processing comprises a plurality of ceramic supporting strips and a supporting frame, the ceramic supporting strips are vertically arranged, and the plurality of ceramic supporting strips are arranged in parallel; the ceramic supporting strip comprises a continuous ceramic line, and the diameter of the ceramic line is 1-2 mm. The ceramic line is provided with a plurality of first arc-shaped ceramic line segments, every two adjacent first arc-shaped ceramic line segments are connected through a connecting part, and each connecting part comprises a horizontal ceramic line segment or a second arc-shaped ceramic line segment. The first arc-shaped ceramic line segment is of an arc-shaped structure; the arc-shaped ceramic line segment is of an arc-shaped structure; the ceramic support strip is prepared by integral forming; the prepared ultra-thin glass bearing device is resistant to acid and alkali corrosion and stable at high temperature, and the supporting strips used for bearing ultra-thin glass are integrally formed and long in service life.

This invention relates to a nano-suspension containing thiazolium zinc and kasugamycin, wherein the mass ratio of thiazolium zinc to kasugamycin in the suspension is 7:1, and the particle size D90 of the suspension is 0.40 μm to 0.80 μm. The nano-suspension is prepared by thoroughly mixing thiazolium zinc technical, kasugamycin technical, necessary suspending agents, and water, followed by sand milling. In the suspension containing thiazolium zinc and kasugamycin prepared by this invention, the decomposition rate of kasugamycin is lower, and it is suitable for maintaining a low decomposition rate for extended periods in harsh environments.

This invention discloses a working solution for synthesizing hydrogen peroxide via the anthraquinone method, comprising a solvent and a working carrier. The solvent comprises aromatic hydrocarbons, diisobutylmethanol, and terephthalamide derivative A. Terephthalamide derivative A, by volume, has C9~C64... 10 The aromatic hydrocarbon comprises 30-95 parts, preferably 60-80 parts; the diisobutylmethanol comprises 2-20 parts, preferably 5-15 parts; and the terephthalamide derivative A comprises 5-30 parts, preferably 5-15 parts; the aromatic hydrocarbon is generally C9-C6. 10 Aromatic hydrocarbons; the working carrier is one or more of anthraquinone and its derivatives. This working solution exhibits excellent solubility and mass transfer capabilities for hydrogen, anthraquinone, and hydroanthraquinone, with a hydrogenation efficiency exceeding 13 g / L. It has low miscibility with water, good extraction and separation effects, and stable physicochemical properties. It can improve the production efficiency of the anthraquinone process for producing hydrogen peroxide and has promising prospects for industrial application.

The application relates to a powder containing n-butyl thiophosphoric triamide and application thereof. The powder containing n-butyl thiophosphoric triamide provided by the application can effectively reduce the decomposition rate of n-butyl thiophosphoric triamide after being added into a fertilizer, effectively prolong the action time of n-butyl thiophosphoric triamide, and improve the urease inhibition effect.

The application discloses a coupling method and system for cumene refining and low-temperature concentration of cumene hydroperoxide, wherein the coupling method for cumene refining and low-temperature concentration of cumene hydroperoxide comprises the steps of refining cumene and low-temperature concentrating cumene hydroperoxide, and heat coupling is performed between the refining process of cumene and the refining process of cumene hydroperoxide by controlling the temperature and pressure of cumene refining and the temperature and pressure of cumene hydroperoxide concentration. The application realizes zero energy consumption in the concentration process, effectively establishes a low-temperature double-effect process, and simultaneously achieves the purposes of reducing product decomposition and energy consumption.

The invention provides a sterilization and disinfection liquid composition which comprises sodium silicate, sodium benzoate, sodium acetate, sodium persulfate, sodium chloride and sodium metaphosphate, the composition is simple in raw material composition and low in cost, and the obtained composition is extremely high in stability, not easy to decompose, easy to store and transport and extremely high in economic value.