9 results about "Atmospheric oxygen" patented technology

The present invention provides a device with a simple configuration that efficiently dissolves atmospheric oxygen into a liquid. [Solution] The apparatus comprises a liquid injection section for pouring liquid, and a bent hollow pipe having an upper vertical pipe section, a lower vertical pipe section, and a horizontal pipe section connecting them. When the internal cross-sectional area of ​​the horizontal pipe section is 1a' and the cross-sectional area of ​​the liquid flowing inside the horizontal pipe section is 1b', the condition 1 / 5 ≤ 1b' / 1a' ≤ 2 / 3 is satisfied. Within this range, a cavity is formed in the horizontal pipe section where the mixed flow and the inner wall of the bent hollow pipe form the outer circumference. Bubbles are stored in the cavity, and repeated movement of bubbles between the cavity and the mixed flow promotes the dissolution of oxygen into the liquid.

A process for producing nitric acid by the Ostwald process involves reacting ammonia with atmospheric oxygen as primary air to afford a NOx-containing gas stream in an ammonia oxidation reactor at a first pressure and absorbing the NOx-containing gas stream in water in an absorption apparatus at a higher, second pressure. Nitric acid is bleached with bleach air as secondary air at approximately the first pressure. The secondary air is brought to an operating pressure of the bleaching operation via a separate secondary air compressor or compressor stage. The separate secondary air compressor is independent of the compressor that brings the primary air to the first pressure. Compression to the second higher pressure at which the absorption of the NOx gases is performed in the absorption apparatus is provided only downstream of the bleaching operation.

The invention relates to a method for removing atmospheric oxygen from a granular adsorber material (1) enriched with carbon dioxide, in particular in a DAC system (100; 100a), wherein the atmospheric oxygen is displaced from the adsorber material (1) by a medium that displaces the atmospheric oxygen.

The invention relates to a method for manufacturing a photonic substrate (1) comprising the preparation of a base substrate having a dielectric thickness (3') on and in contact with a trapping layer (4) and an interlayer made of an oxidizable material on and in contact with the dielectric thickness (3''). The method also comprises transferring an electro-optical layer (2) onto the interlayer to form an intermediate substrate. According to the invention, the intermediate substrate is thermally treated in an atmosphere containing oxygen at a temperature and for a duration sufficient to allow the diffusion of atmospheric oxygen through the electro-optical layer (2) and to allow the complete oxidation of the interlayer. Figure 1

This invention provides a method for recovering metallic copper by atmospheric pressure oxygen-enriched leaching, relating to the field of hydrometallurgy. The method includes: mixing copper sulfide concentrate with a sulfuric acid solution to obtain a mixed slurry; introducing an oxygen-rich gas under atmospheric pressure to carry out a leaching reaction; and after the reaction, separating the liquid and solid to obtain a copper-containing leachate. By using the synergistic leaching of sulfuric acid solution and oxygen-rich gas under atmospheric pressure, this method eliminates the reliance on expensive high-pressure equipment, removes the safety hazards of high-pressure explosions, and significantly reduces equipment corrosion and investment costs. Using oxygen as a highly efficient oxidant, this method significantly shortens the extraction cycle, overcomes the drawbacks of time-consuming bioleaching and the generation of waste, and achieves efficient, safe, and low-cost extraction of metallic copper from copper sulfide concentrate.

The invention relates to a method for removing atmospheric oxygen from a granular adsorber material (1) enriched with carbon dioxide, in particular in a DAC system (100; 100a), wherein the atmospheric oxygen is displaced from the adsorber material (1) by a medium that displaces the atmospheric oxygen.

The invention provides an atmospheric oxidation source analysis and regulation method, device and equipment, and belongs to the field of atmospheric pollution. The method comprises the steps that the pollutant concentration of air in a target area is obtained; an atmospheric chemical reaction process is simulated through the box model, and an atmospheric oxidability calculation path is determined; constructing a species concentration matrix of pollutants, and determining the category of an emission source and the contribution degree of the emission source to the concentration of a precursor; the atmospheric oxidizability calculation path, the emission source category and the contribution degree to the precursor concentration are associated, and the atmospheric oxidizability source and the contribution degree are determined; setting a gradient emission reduction proportion combination and performing simulation according to an atmospheric oxidizability source; and taking the simulation mode reaching the preset standard in the simulation result as the optimal regulation and control mode. The technical path not only improves the accuracy of quantitative characterization of the atmospheric oxidability, but also provides a scientific basis for cooperative control of primary pollutant emission and inhibition of secondary pollution.

The invention relates to a method for removing atmospheric oxygen from a granular adsorber material (1) enriched with carbon dioxide, in particular in a DAC plant (100; 100a), in which the atmospheric oxygen is displaced from the adsorber material (1) by a medium displacing the atmospheric oxygen.