5 results about "Hydrolytic Process" patented technology

The application discloses a method for continuously fermenting urine to produce safe fertilizer, which comprises the following steps: in the first fermentation, adding environment-friendly enzyme into a container, then collecting fresh urine and adding molasses, and carrying out fermentation in a sealed manner; after the fermentation is completed, reserving part of the fermentation liquor as a substrate; and in the subsequent batches, directly adding fresh urine and molasses into the container with the substrate to carry out fermentation, so as to realize continuous circulation. The method can inhibit the hydrolysis process of urea in the urine in the early stage by timely adding environment-friendly enzyme (or the fermentation liquor of the last time) and molasses into the fresh urine to carry out fermentation, thereby greatly reducing the ammonia nitrogen volatilization amount, and the pathogenic bacteria in the urine can be inhibited to a very low level in a short period of time. Except that the environment-friendly enzyme needs to be added in the first fermentation, the environment-friendly enzyme does not need to be added in the subsequent batches of fermentation, and only a small amount of molasses needs to be added. A large amount of beneficial bacteria such as lactic acid bacteria and yeast and metabolic products such as lactic acid and acetic acid are generated in the fermentation process, so that the urine is converted into microbial bacterial fertilizer.

The application relates to a method for preparing high-purity alpha-Al2O3 by hydrolysis and one-time calcination of an aluminum alloy, and belongs to the technical field of alumina preparation. Aluminum, gallium, indium and tin are used as raw materials, a melt is obtained after melting, flaky aluminum alloy is prepared, and the flaky aluminum alloy is crushed into powder and reacts with pure water, solid and hydrogen are collected respectively, and high-temperature calcination is carried out under a hydrogen atmosphere, thereby obtaining high-purity alpha-Al2O3. The activity of the aluminum is activated by preparing an aluminum-gallium-indium-tin alloy, and the broken aluminum alloy powder is used for hydrolysis reaction, so that the reaction rate is larger, the impact of hydrogen on the product is larger during the hydrolysis process, the particle size of the product is smaller, the removal of impurities in the calcination process is more favorable, the purity of the alumina obtained after the calcination is larger, and the particle size is smaller.

The application discloses a method for removing hardness ions in water by using industrial tail gas micro-nano bubbles, and relates to the technical field of water treatment. The method comprises the steps of adjusting an alkali, industrial tail gas softening and high-fiber rotating disc filtration. In the step of adjusting an alkali, the pH of high-hardness water is adjusted to be alkaline, so that the slightly soluble hardness substances Ca(HCO3)2 and Mg(HCO3)2 in the water are converted into CaCO3 and MgCO3 precipitates, and the generation of HCO3 ‑ in the hydrolysis process of the step of industrial tail gas softening is prevented; in the step of industrial tail gas softening, micro-nano industrial tail gas bubbles are introduced into the water, CO3 ‑ and SO3 2‑ generated by hydrolysis are used to convert Ca 2+ and Mg 2+ in high-hardness water into precipitates; and in the step of high-fiber rotating disc filtration, the precipitates generated in the step of industrial tail gas softening are subjected to solid-liquid separation by a high-fiber rotating disc.

This invention belongs to the field of ruthenium-based catalyst preparation, specifically disclosing a ruthenium nitrate and its preparation method. By adding a surfactant during the hydrolysis process and coordinating it with a subsequent calcination process, this invention can improve the dispersibility of the obtained ruthenium nitrate powder, reduce the particle size of the obtained ruthenium nitrate powder, significantly reduce the content of impurities such as sodium and chlorine, and improve the purity of the ruthenium nitrate product.

The application belongs to the technical field of silica preparation, and specifically provides a production process of high-purity nano-silica, which comprises the following steps: taking quartz sand for acid immersion, then reacting with hydrofluoric acid to obtain a fluosilicic acid solution, adding concentrated sulfuric acid to the fluosilicic acid solution to prepare silicon tetrafluoride gas, and then performing hydrolysis, filtration, washing, drying and calcination on the silicon tetrafluoride gas to obtain high-purity nano-silica; a dispersing agent is added in the hydrolysis process; the preparation raw materials of the dispersing agent used in the application include maltose and N-hydroxysuccinimide. The nano-silica prepared by the application has a higher specific surface area and purity, and a smaller and more uniform particle size.