6 results about "Heteroatom" patented technology

The present invention provides a non-metallocene catalyst comprising a complex having one or more ligands coordinated a transition metal. The catalyst contains substituents bonded to the transition metal through a heteroatom such as oxygen or sulfur. Furthermore, the complex includes a Group 3 to 10 transition or lanthanide metal and one or more anionic or neutral ligands in an amount that satisfies the valency of the metal such that the complex has a net zero charge. The present invention also discloses a method for preparing the catalyst and polymerizing olefins utilizing the catalyst of the present invention.

The present invention is related to a galvanic nickel or nickel alloy electroplating bath for depositing a semi-bright nickel or nickel alloy coating characterized in that the electroplating bath comprises at least one compound having the general formula (I)

The present invention deals with employing Heteroatoms namely Nitrogen, Sulphur intrinsic embedded carbon nanotubes (H-CNT) as multifunctional additive for preparing lead acid battery electrodes to substitute the expander chemicals namely, Vanisperse, Dinel Fibre, Barium sulphate and carbon black. Further the invention provides H-CNT in-situ produced from Crude oil or its products.

The invention relates to a method for preparing high-purity porous graphite, which comprises the following steps of: graphitizing amorphous carbon by using an electrochemical method to obtain a graphite-based composite material embedded with MX particles, performing oxidation treatment on the obtained composite material in an oxygen-containing atmosphere, cooling the solid subjected to oxidation treatment, washing to remove electrolyte impurities in the solid, and drying to obtain the high-purity porous graphite. The porous graphite material is obtained. The method can be suitable for impurity removal of amorphous carbon with high heteroatom content after electrochemical graphitization, the source of the amorphous carbon precursor is greatly expanded, renewable resources can be used, and the method is more energy-saving and environment-friendly; the impurity removal effect is good, the electrolyte can be completely removed, and the porous graphite with extremely high purity is obtained; the obtained porous graphite has accumulated pores among lamellar graphite, and the lamellar graphite is also provided with pores, so that the porous graphite can be applied to various fields. When applied to an ion-embedded electrode material, the material has good capacity and rate capability.

The invention provides a heteroatom-doped porous carbon material with a high specific surface area, and a preparation method thereof. The preparation steps are as follows: (1) mixing a copper nanoparticle template with a surfactant and a reaction initiator in water to obtain a precursor mixed solution, then adding a polymer monomer are to carry out a polymerization reaction, and separating a polymer coated with the copper nanoparticle template by centrifugation; (2) performing thermal cracking on the polymer; and (3) treating the carbonized product with an acidic solution to dissolve the copper nanoparticle template, performing centrifugal separation to obtain a precipitate, namely the product, and retaining a supernatant to prepare a new copper nanoparticle template. The heteroatom dopingamount, morphology, particle size, and pore volume of the material provided by the invention are easy to control, and the application in different fields such as new energy materials, electrochemicalmaterials, and biological materials is convenient. In addition, the technical route realizes recycling of the metal nano template, the cost during large-scale production can be significantly reduced,and thereby the technical route has practical application significance.