4 results about "Diphosphenes" patented technology

This invention belongs to the field of wet electrolytic refining technology for recycled lead, and provides a method for electrolytically preparing ultra-high purity lead. It involves constructing a 1-hydroxyethylidene-1,1-diphosphonic acid-modified lead carbonate seed layer on the cathode plate surface, combined with a bypass impurity removal unit to continuously remove impurity ions from the electrolyte, and then using staged current density electrolysis to ensure uniform nucleation and stable deposition of lead on the cathode surface. The resulting cathode lead has a purity of not less than 99.996 wt%, and the deposited layer is dense, flat, and has a low risk of inclusions. This method solves the problems of difficulty in balancing high-throughput deposition and ultra-high purity, as well as the difficulty in synchronizing seed layer adhesion stability and pollution control in existing processes. It is suitable for the high-value preparation of recycled lead from waste lead-acid batteries.

An object of the present invention is to provide a cleaning composition which has excellent removability of a residue (particularly, a residue after CMP) and excellent anticorrosion properties of copper; a cleaning method of a semiconductor substrate; and a manufacturing method of a semiconductor element. The cleaning composition of the present invention contains citric acid, 1-hydroxyethane-1,1-diphosphonic acid, a sulfonic acid-based surfactant, and water, in which a mass ratio of a content of the citric acid to a content of the 1-hydroxyethane-1,1-diphosphonic acid is 20 to 150, a mass ratio of the content of the citric acid to a content of the sulfonic acid-based surfactant is 70 to 1,500, and a pH is 0.10 to 4.00.

This invention discloses a new energy antifreeze and its preparation method, relating to the field of antifreeze technology. The invention comprises the following raw materials in parts by weight: 350-390 parts high-purity water, 500-580 parts ethylene glycol, 25-30 parts corrosion inhibitor, 30-40 parts composite corrosion inhibitor, 50-70 parts corrosion inhibitor solution, 1-2 parts polyethylene oxide, 2-3 parts triethyl borate, 1.3-4 parts triethanolamine, 0.4-1 parts antifoaming agent solution, and 0.1-0.3 parts dye solution. The corrosion inhibitor is prepared by hydrolyzing and protonating polysuccinimide, then grafting it with 2-undecylbenzimidazole-N-ethanol, and finally grafting it with hydroxyethylidene diphosphonic acid. The introduction of the corrosion inhibitor and composite corrosion inhibitor in this invention effectively improves the insulation stability and corrosion resistance of the antifreeze for new energy vehicles. Therefore, this invention has a wider range of application prospects.

The present invention relates to the field of catalytic hydrogenation, and more particularly to the hemihydrogenation of allenes to corresponding alkenes in the presence of a homogeneous catalyst system, wherein the homogeneous catalyst system comprises a cobalt salt, a bidentate diphosphine ligand, and a weakly coordinating or non-coordinating monoanion or reducing agent.