44 results about "Hydrogen peroxide generation" patented technology

Herein are disclosed PGM-free catalysts, made starting from transition metal phthalocyanine complexes, useful for catalytic ORR, and more particularly, alcohol tolerant catalysts as cathode material for ORR in alkaline and acid medium, characterized by low hydrogen peroxide generation and having better performance, stability and activity.

A vapor decontamination system for decontaminating a defined region. The system is comprised of a chamber defining a region, and a generator for generating vaporized hydrogen peroxide from a solution of hydrogen peroxide and water. A closed loop circulating system is provided for supplying the vaporized hydrogen peroxide to the region. A destroyer breaks down the vaporized hydrogen peroxide, and sensors upstream and downstream from the destroyer are operable to sense moisture in the system and provide electrical signals indicative thereof. A controller determines the presence of vaporized hydrogen peroxide in the region based upon the electrical signals from the sensors.

The present invention relates to a composition comprising a coupled enzyme system for the rapid and efficient production of hydrogen peroxide by the coupling of a first enzyme system capable of hydrogen peroxide generation, to a second enzyme system which utilizes the non hydrogen peroxide product of the first enzyme system, and optionally is capable of generating further hydrogen peroxide.

In production of ultrapure water by purifying primary pure water with a secondary pure water manufacturing apparatus and a tertiary pure water manufacturing apparatus, high-purity ultrapure water is produced, wherein generation of hydrogen peroxide is minimized and the concentrations of TOC, DO, and hydrogen peroxide are reduced to the limit. In an ultrapure water manufacturing system, each of the secondary pure water manufacturing apparatus and the tertiary pure water manufacturing apparatus includes an ultraviolet oxidation device and a deionization device, downstream therefrom, by using an ion exchange resin. UV light control is performed in such a way that the hydrogen peroxide concentration results in 1 to 30 μg / L and the TOC concentration results in 1 to 10 μg / L at the outlet of the ultraviolet oxidation apparatus of the secondary pure water manufacturing apparatus and, in addition, the TOC concentration results in 0.1 to 5 μg / L at the outlet of the ultraviolet oxidation apparatus of the tertiary pure water manufacturing apparatus. UV light control is performed in such a way that the TOC concentration results in 1 to 10 μg / L at the outlet of the ultraviolet oxidation apparatus of the secondary pure water manufacturing apparatus and, in addition, the hydrogen peroxide concentration results in 1 to 20 μg / L and the TOC concentration results in 0.1 to 5 μg / L at the outlet of the ultraviolet oxidation apparatus of the tertiary pure water manufacturing apparatus.

A vapor decontamination system for decontaminating a defined region. The system is comprised of a chamber defining a region, and a generator for generating vaporized hydrogen peroxide from a solution of hydrogen peroxide and water. A closed loop circulating system is provided for supplying the vaporized hydrogen peroxide to the region. A destroyer within the closed loop circulating system breaks down the vaporized hydrogen peroxide. A bypass conduit is provided to bypass the destroyer. A controller causes vaporized hydrogen peroxide from the generator to bypass the destroyer during a predetermined phase of operation.

The invention relates to the field of organic chemical synthesis, and in particular, relates to a macrocyclic compound as well as a preparation method and application thereof. The preparation method of the macrocyclic compound comprises the steps: carrying out a reaction on a monomer with a benzyl bromide compound with a symmetrical structure to prepare a first macrocyclic compound, wherein the monomer has a structure represented by a formula I. The material disclosed by the invention is synthesized at normal temperature, reaction conditions are mild, and amplification synthesis can be easilyrealized; the material is not subjected to high-temperature pyrolysis and is free of metal doping, and the material is directly used for oxygen cathode reduction of a fuel cell and has excellent hydrogen peroxide generation performance. The material is an ionic carbon material, so that the selectivity of hydrogen peroxide is improved. The material provided by the invention can be made into a membrane electrode with a sandwich structure, has relatively large current and good stability, and has high-concentration hydrogen peroxide production potential.

The invention provides an assay method for determining a level of haptoglobin in a sample comprising the steps of: (i) mixing haemoglobin with the sample to be assayed so as to form a haptoglobin-haemoglobin complex with haptoglobin present in the sample; (ii) contacting the product of step (i) with reagents for generating hydrogen peroxide and one or more chromogens which undergo a spectroscopically detectable change when peroxidase activity is present, in the presence of a buffer, under conditions in which hydrogen peroxide is generated from said reagents and forms a substrate for the peroxidise activity of the haptoglobin-haemoglobin complex present, and wherein the pH of the buffer is within a range which is sufficiently low that the peroxidise activity of any uncomplexed haemoglobin is substantially suppressed but sufficiently high that hydrogen peroxide generation occurs; (iii) determining the peroxidase activity of the haptoglobin-haemoglobin complex by measuring the change in an optical property of the reaction mixture; and (iv) correlating the level of peroxidise activity of the haptoglobin-haemoglobin complex with the amount of haptoglobin in the sample. A kit for use in such a method is also provided.

The present invention provides a method for obtaining a high-quality regenerated working solution by removing an inactive material from a working solution containing trioctyl phosphate (TOP). A methodfor producing hydrogen peroxide includes a hydrogen peroxide production process of hydrogenating and then oxidizing a working solution containing aromatic hydrocarbons, TOP, and anthraquinones, to generate hydrogen peroxide, extracting the hydrogen peroxide from the working solution, after hydrogen peroxide extraction, the working solution returning to a hydrogenating process to cycle; a workingsolution regeneration process of removing the inactive material of a by-product of hydrogen peroxide generation from the working solution to prepare a crude regeneration working solution; and a step of performing alkali cleaning on the crude regeneration working solution to prepare a regeneration working solution for recycling, the working solution regeneration step comprising: i) a first distillation step of recovering aromatic hydrocarbons by distillation under atmospheric pressure or less; ii) then, a second distillation step of distilling and recovering the anthraquinones and the TOP underlower pressure and at temperature of 160 DEG C or higher.