189 results about "Acid oxidation" patented technology

The invention provides a method for separating and utilizing neodymium iron boron waste materials. The method comprises the following sequential steps of dissolution with hydrochloric acid, primary solid-liquid separation, precipitation with oxalic acid, secondary solid-liquid separation, hydrolysis process, third solid-liquid separation, acidic oxidation process, precipitation of ferric phosphate, fourth solid-liquid separation, evaporation and concentration, and fifth solid-liquid separation. Iron oxide red and praseodymium oxide are obtained through the steps of dissolution with hydrochloric acid, primary solid-liquid separation, precipitation with oxalic acid and secondary solid-liquid separation; iron oxide red and ferric phosphate precipitate are obtained through the steps of dissolution with hydrochloric acid, primary solid-liquid separation, precipitation with oxalic acid, secondary solid-liquid separation, hydrolysis process, third solid-liquid separation, acidic oxidation process, precipitation of ferric phosphate and fourth solid-liquid separation; ammonium chloride is obtained through the steps of dissolution with hydrochloric acid, primary solid-liquid separation, precipitation with oxalic acid, secondary solid-liquid separation, hydrolysis process, third solid-liquid separation, acidic oxidation process, precipitation of ferric phosphate, fourth solid-liquid separation, the evaporation and concentration and fifth solid-liquid separation. The method is high in recovery rate and purity, environment-friendly and pollution-free, low in recovery cost and the like.

The invention discloses a method for preparing a ferrocene functionalized carbon nanotube composite material through thiol-ene click chemistry. The method comprises the following steps: through an acid oxidation modification method, performing carboxyl functionalization on the surface of a multi-walled carbon nanotube; performing sulfydryl modification on the surface through amidation with aminothiol; and selecting an appropriate ferrocene derivative with carbon-carbon double bonds to prepare the ferrocene functionalized carbon nanotube composite material through thiol-ene click chemical reaction. The method is mild in reaction condition and simple and convenient in process; and the prepared ferrocene functionalized carbon nanotube composite material has good dispersion uniformity, stability, conduction reversibility, electric catalytic property and biocompatibility, is low in cost, and can be applied to conductive materials, chemical and biological sensors, biological analysis and other fields as a novel functionalized nanocomposite material.

The invention provides a system and a method for cleaning and sterilizing related equipment in the beer producing process. The system that uses oxidation potential water to clean and sterilize the beer producing equipment comprises oxidation potential water generator equipment and cleaning and sterilizing equipment. The oxidation potential water generator equipment comprises a filtering and softening device, an electrolyzer preparing and supplying device, an electrolytic module, an acid water stock solution device, an alkaline water stock solution device, an acid water conveying device, an alkaline water conveying device, a central control device and an electric potential water physicochemical index detecting device. In the invention, acid oxidation potential water is adopted to replace original chemical disinfectant so as to realize sterilizing treatment on the related equipment, appliances and the like in the beer producing process; and compared with an original method that uses chemical disinfectant, the system and the method have obvious advantages.