Abstract:
The present invention relates to the recovery of rare earths, scandium, niobium, tantalum, zirconium, hafnium, titanium, and the like from ores or concentrates containing fluorine. More specifically, the ores or concentrates are pretreated by carbochlorination to convert the rare earths and other metals into their chlorides and then subjected to dilute hydrochloric acid leaching to recover the valuable rare earths and other metals from the leachate. Niobium, tantalum, zirconium, hafnium, and titanium can be recovered as their chlorides or oxychlorides from the gaseous products of carbochlorination, or converted into their oxides while simultaneously regenerating chlorine.
Abstract:
The present disclosure related to an economic and environmental safe process for obtaining one or more metals from the red mud slag, bauxite, karst bauxite, lateritic bauxite, clay and the like. The present disclosure also related to a process for obtaining elemental aluminum by electrolyzing AICI3 in the electrolysis cell.
Abstract:
A process for preparation of lower chlorides of titanium is provided, in which titanium tetrachloride (TiCl 4 ) is reduced using a reducing agent in at least one molten alkali metal salt at a temperature of about 300 to about 1400°C to obtain a reduced mass containing lower chlorides of titanium. A process for preparation of titanium metal from the lower chlorides of titanium is also provided.
Abstract:
The present invention provides a method for the Industrial production of a titanium salt TP, said method comprising the steps of: i. Precipitation of titanic acid from a solution comprising titanium salt TP1; ii. Production of a titanium containing product TP2 from a medium comprising of said titanic acid and an acid; and iii. Thermal conversion of titanium containing product TP3 to a titanium salt TP at temperature higher than 17Oº C
Abstract:
Cyclical batch processes for halogenation, such as chlorination, of minerals in a fixed bed (12, 42, 62, 82) using a plurality of cycles which include the steps of at least partially evacuating the bed, charging the bed (12, 42, 62, 82) with reactant gas, maintaining the reactant gas in the bed (12, 42, 62, 82) for a predetermined time, and exhausting reaction products under vacuum. Also disclosed is the chlorination of spodumene in its beta crystalline form produced by calcining spodumene in its naturally occurring alpha crystalline form to preferentially extract lithium as lithium chloride.
Abstract:
A process for preparation of lower chlorides of titanium is provided, in which titanium tetrachloride (TiCl4) is reduced using a reducing agent in at least one molten alkali metal salt at a temperature of about 300 to about 1400°C to obtain a reduced mass containing lower chlorides of titanium. A process for preparation of titanium metal from the lower chlorides of titanium is also provided.
Abstract:
An organic-inorganic hybrid composition comprising a thermoplastic resin and oxide particles having a particle size of from 1 to 15 nm, wherein the oxide particles have surfaces modified with a surface-modifying agent and a water absorption of at most 8%, has high refractivity and transparency and low water absorption.
Abstract:
The invention relates generally to processes for the production of high- basicity and ultr- high basicity polyaluminum chlorides including aluminum chlorohydrate. The processes can produce products of a wide range of basicities and are particularly useful in producing high basicity products. The process can produce a wide range of solution concentrations and are particularly useful in producing high solution concentrations. The processes described generate high purity products, which are free of by-product salt(s). The processes described herein can also be utilized to produce enhanced efficacy polyaluminum chlorides including aluminum chlorohydrate. When compared to conventional processes for manufacturing these compounds the processes disclosed herein are unique in so far as the disclosed processes do not require aluminum metal as a starting material. The products of the processes are suitable in applications including water purification, catalysts, and antiperspirants. In addition, the invention is directed to the products prepared by the processes described herein.
Abstract:
Es wird ein Verfahren zur Herstellung von Elementhalogeniden beschrieben, das dadurch gekennzeichnet ist, dass in einem ersten Schritt eine Mischung aus einem Material enthaltend das entsprechende Element und Kohlenstoff oder kohlenstoffhaltigem Material hergestellt wird und diese Mischung mit einem unter den Reaktionsbedingungen gasförmigen Halogen, Halogenwasserstoff oder deren Gemischen in Kontakt gebracht und erhitzt wird, wobei die Energiezufuhr durch ein elektromagnetisches Wechselfeld erfolgt.
Abstract:
Systems and methods are provided for producing ultra high purity titanium tetraiodide, on the order of at least 99.998 % pure, and for producing ultra high purity titanium metal having a purity of greater than 99.998 % pure. The system includes a titanium tetraiodide generating subsystem; a titanium tetraiodide purification subsystem wherein titanium tetraiodide is refined to ultra high purity by a double distillation process at reduced pressure; and a titanium tetraiodide decomposition subsystem wherein titanium tetraiodide is decomposed and ultra high purity titanium metal is deposited on a deposition substrate. The ultra high purity titanium tetraiodide can be used as a precursor for the titanium metal production, or it may be utilized in other semiconductor applications. Also contemplated are methods of making ultra high purity metal halides wherein the halide is selected from the group consisting of bromides, chlorides, iodides and fluorides.