56results about How to "Achieving yield" patented technology

A novel bis-chelating composition characterized by formula I: wherein M is a Group VB element; R1 and R2 are each independently selected from hydrogen and monovalent hydrocarbyl radicals; or R1 and R2 are bonded together to form a diradical; or one of R1 or R2 is hydrogen or a monovalent hydrocarbyl radical, while the other of R1 or R2 is a hydrocarbyl radical bonded to an atom in Ar; wherein Ar is selected from 1,2-arylenes; Q is selected from 1,2-arylenes, 2,2′-bisarylenes and alkyl diradicals; and W is selected from II, III, IV, or V: wherein M is as defined hereinbefore; each R is independently selected from hydrogen and monovalent hydrocarbyl radicals; X is selected from alkyl and aryl diradicals; Ar1 and Ar2 are each independently selected from 1,2-arylenes;Ar3 and Ar4 are each independently selected from monovalent aryl radicals; and n in formula IV is 0 or 1. The composition finds utility as a ligand in catalysts for carbonylation processes

The invention discloses an automatic loading and unloading device for a graphite boat sticking point. The automatic loading and unloading device comprises a rack main body, a moving bracket, a grabbing module, a pressing rod module and an ejector rod module. The moving bracket is fixedly mounted at the upper end of the rack main body, and a point loading station and a point unloading station are arranged at the position, corresponding to the moving bracket, of the rack main body. The ejector rod module is arranged in the rack main body and is arranged corresponding to the point loading station. A movable frame in sliding connection is arranged at the positions, corresponding to the point loading station and the point unloading station, of the moving bracket. The grabbing module is fixedlyconnected to the upper end of the moving frame, and the pressing rod module is fixedly connected to the lower end of the moving frame. The rack main body further comprises a graphite flake to-be-assembled and disassembled sticking point position, an assembled-sticking-point graphite flake position, a sticking point mold plate position and an empty sticking point mold plate position; and lifting adjusting devices are arranged at the positions, corresponding to the graphite flake to-be-assembled and disassembled sticking point position, the assembled-sticking-point graphite flake position, the sticking point mold plate position and the empty sticking point mold plate position, of the bottom of the rack main body. The device has the advantages that the sticking point replacement efficiency and percent of pass are improved, and the service life of a graphite boat is prolonged.

The present invention proposes a carbon-based solid acid catalyst and its preparation method and its application to biomass hydrothermal conversion, wherein the preparation method of the carbon-based solid acid catalyst comprises the following steps: mixing pectin with water, and then adding Concentrated sulfuric acid is activated, and then the mixture is added to the ion resin of the aromatic ring matrix; the obtained material is dried, the obtained material is pulverized into powder, and pyrolyzed under dry inert gas; the solid obtained after pyrolysis is sulfonated with concentrated sulfuric acid Treatment; the obtained product is diluted with water and then filtered, and the filtered filter residue is washed with water until sulfate ions are no longer detected in the washing water; the filtered solid is dried. The prepared catalyst has distinct particles, is not easy to be lost, and is convenient for recycling. Moreover, the prepared catalyst can simultaneously realize the hydrothermal conversion of five-carbon sugars and six-carbon sugars, and achieve the purpose of preparing high-value platform compounds.

An electronic device of the technology includes: a plurality of first wiring patterns that are electrically coupled to each other partially, and each extend in a first direction; an organic insulating layer that is provided on the first wiring patterns; and a second wiring pattern that is provided on the organic insulating layer.

A method for impurity removal and purification of titanium concentrate by suspending roasting, which is carried out according to the following steps: (1) grinding the titanium concentrate; Tailings; (3) The tailings of a section of magnetic separation are dehydrated by pressure filtration, and the filter residue is transported to a dry suspension roaster, which is fed into a high-temperature flue gas for suspension drying; (4) The dry material is transported to a weak oxidation suspension roaster. In the heating section, it is heated to 600-800°C, enters the oxidation section and undergoes a weak oxidation reaction under the action of air, and the weak oxidation material is cooled by heat exchange to form a cooling material; (5) The cooling material is subjected to a second-stage magnetic separation to obtain a second-stage magnetic separation Concentrate and second-stage magnetic separation tailings; first-stage magnetic separation concentrate and second-stage magnetic separation concentrate are used as purified titanium concentrate products. The invention has the advantages of simple technological process, large equipment processing capacity, easy control of product properties, energy saving and environmental protection in industrial application, and easy realization of large-scale.