5results about How to "Resolve source issues" patented technology

The invention discloses graphite tailing matrix soil and a preparation method thereof, and belongs to the technical field of tailing remediation, and the preparation method comprises the step of uniformly mixing 93.26-95.94% of graphite tailings, 3-5% of animal waste, 0.16-0.24% of a modifier A and 0.9-1.5% of diatomite. According to the graphite tailing matrix soil and the preparation method thereof, a new way is provided for consumption of graphite tailing resources, so that the problems of source of ecological restoration soil in a mining area and stacking of a large amount of graphite tailings are solved, and a win-win situation of social development and ecological environment protection is realized.

The utility model relates to the field of environmental protection machinery device, concretely relates to a small pure electricity high -level self -loading and unloading garbage collection car hydraulic system device, including having auxiliary frame, being provided with garbage bin on the auxiliary frame, the front end of auxiliary frame is provided with the installation and has power unit assembly and pressure relay, still including have the lifting oil cylinder, the lifting oil cylinder is installed between auxiliary frame and the lifting arm, and the turnover oil cylinder is installed between the lifting arm and fixed frame, and the hanging bucket oil cylinder is fixedly installed between fixed frame and the hanging bucket frame, still including have the whole car support oil cylinder, the whole car support oil cylinder has two, is installed respectively in the left and right two ends of auxiliary frame, and the pressure relay and hydraulic oil pipe are connected with power unit and the whole car support oil cylinder respectively, solve the operator when clamping garbage can of present stage not completely clamping, just lifting lifting mechanism, or lifting mechanism not falling in place just lifting garbage can and cause the interference before garbage can and lifting mechanism, cause the problem of deformation even scrap.

This invention relates to a method for synthesizing 1-cyclopropyl-4-oxo-7-fluoro-8-methoxy-1,4-dihydroquinoline-3-carboxylic acid, a key intermediate for numonoxacin. The method uses 2,4-difluoro-3-methoxyacetophenone as a starting material and proceeds through four steps: haloform reaction, acyl chloride formation and Maxwell's acid condensation, reaction with dimethylformamide dimethyl acetal and cyclopropylamine, and base-catalyzed cyclization and acid deprotection. This efficient method yields the target intermediate. The synthetic route of this invention utilizes readily available raw materials, mild reaction conditions, and simple operation. The multi-step reaction can be carried out in a one-pot process, achieving a total conversion rate of approximately 85% and a product purity exceeding 99.5%, making it suitable for industrial production.

The invention relates to low-temperature fired white Yellow River sediment microcrystalline glass and a preparation method thereof. The low-temperature fired white Yellow River sediment microcrystalline glass comprises the following raw materials: 50-65% of Yellow River sediment, 15-25% of CaCO3, 5-10% of dolomite, 3-10% of silica sand, 1-5% of Na2SiF6, 1-5% of K2CO3, 1-5% of chromite and 1-5% of TiO2. B2O3-CuO accounting for 1%-4% of the total weight of the raw materials is added. The preparation method comprises the following steps: (1) melting raw materials to obtain basic molten glass; (2) molding the molten glass to obtain a glass plate; and (3) coring and crystallizing the glass plate, and then carrying out post-treatment. The microcrystalline glass is prepared by firing the Yellow River silt at low temperature, a new way is provided for high-value utilization of Yellow River silt resources, and the product is high in quality and low in cost and has a wide application prospect.

The invention discloses a method and a device for purifying reducing gas from blast furnace or converter gas. The method comprises a raw material gas pretreatment process, a CO2 gas removal process and a reducing gas CO purification process. And returning the reducing gas to a blast furnace to participate in a metal smelting reaction process or be used for synthesizing an organic chemical product. The method disclosed by the invention is beneficial to reducing carbon emission, and has the advantages of saving operation cost and being low in equipment investment, the equipment is mutually coupled, a residual pressure recovery system is utilized and transformed to recover pressure energy contained in the emptied gas, and cold energy is utilized to cool the feed gas through heat exchange, so that the production efficiency is improved. And finally, carrying out flushing desorption or vacuumizing and flushing desorption on the desorption of the pressure swing adsorption decarbonization device by taking the gas as flushing gas.