63results about "Germanium halides" patented technology

The invention provides a preparation purification method of germanium tetrachloride for optical fibers, which adopts germanium concentrate as a raw material; hydrochloric acid, sulfuric acid, and ferric trichloride are added into a chlorination reaction vessel according to a certain proportion for reaction to prepare crude germanium tetrachloride; the crude germanium tetrachloride is fully mixed with hydrochloric acid and manganese dioxide according to a certain proportion in a repeated distillation reaction vessel for distillation and purification to obtain preliminarily purified germanium tetrachloride; the germanium tetrachloride after repeated distillation purification is processed in a quartz rectifying tower in inert atmosphere by controlling a tower bottom temperature to be 75-95 DEG C, a tower column temperature to be 30-95 DEG C, and a reflux ratio of 4:1-14:1, so as to obtain high-purity germanium tetrachloride. The high-purity germanium tetrachloride prepared through three procedures of chlorination distillation, repeated distillation, and rectification purification, has a content of transition metal impurities of less than 3 ppb, a content of hydrogen-containing impurities of less than 1 ppm, and meets the requirements for perform rod germanium tetrachloride for optical fibers.

The invention relates to treatment of waste metal materials, and in particular relates to a method for recycling germanium, gallium, indium and selenium in a waste diode. The recycling method comprises the following steps of: (1) crushing the waste diode; (2) separating plastic powder from metal powder; (3) oxidizing roasting; (4) recycling selenium; and (5) recycling gallium, indium and germanium. By using the method, the pollution of the diode on the environment is reduced, valuable elements of selenium, indium, gallium and germanium are recycled, and mineral resources are saved; and the method is simple to operate, lower in cost, high in recycling rate of selenium, indium, gallium and germanium elements and very high in purity of recycling products.

The invention discloses a method and a device for removing hydrogen-containing impurities from germanium tetrachloride. The method comprises the steps of: using rectified germanium tetrachloride as raw materials, adding germanium tetrachloride with the purity being 4N-5N into a rectifying kettle for rectification, increasing the temperature of the kettle to 75-83 DEG C for rectification, keeping the germanium tetrachloride to be in a sub-boiling state and feeding in nitrogen with the flow rate being 30-40L/h to exhaust HCl gas, wherein exhaust time is no less than 6 hours; after the HCl gas is exhausted, continuously increasing the temperature of the kettle, and when all sieve plates of a rectifying column are in a boiling state, starting to calculate total reflux time, wherein the total reflux time is no less than 3 hours; and after total reflux is completed, turning on a switch of an electromagnetic valve to adjust the reflux ratio to be 8:1 to 12:1, taking products at a front section, detecting the distilled germanium tetrachloride, if the detected products satisfy the production requirement of the germanium tetrachloride for optical fibers, putting the electromagnetic valve on the side with the products being taken, and finally shifting to a filling process after the obtained germanium tetrachloride products are detected as acceptable. The method and the device for removing the hydrogen-containing impurities from the germanium tetrachloride have the advantages that the technological process is simple, the operation is simple, the hydrogen-containing impurities can be well removed from the germanium tetrachloride, and the industrial use value is very high.

The invention relates to a process for the purification's of silicon tetrachloride or germanium tetrachloride contaminated with at least one hydrogen-containing compound, in which the silicon tetrachloride or germanium tetrachloride to be purified is treated in a targeted manner by means of a cold plasma and purified silicon tetrachloride or germanium tetrachloride is isolated from the phase which has been treated in this way. The present invention further relates to an apparatus for carrying out the process of the invention, which comprises a stock and vaporization unit for silicon or germanium tetrachloride (4.1 or 5.1) which is connected via a connecting line with the inlet of the reactor (4.3 or 5.3) with control unit (4.4 or 5.4) for producing the dielectrically hindered discharges whose outlet leads via a pipe either directly or indirectly via at least one further reactor (5.5) to a condensation unit (4.5 or 5.11) with downstream collection vessel (4.6 or 5.12) which is connected via an offtake line (4.6.2 or 5.12.1) to a distillation unit (4.8 or 5.13) and, if appropriate, is equipped with a feed line (4.6.1) to the unit (4.1).

The invention provides a production system of germanium tetrachloride for optical fiber. The production system of germanium tetrachloride for the optical fiber comprises at least two rectification units. The rectification units are connected with each other in series. Each of the rectification units comprises a rectifying still, a rectifying tower, a primary condensing tower, a secondary condensing tower, a discharging head, a primary exhaust gas absorption device, a secondary exhaust gas absorption device and a exhaust gas treatment device. The secondary exhaust gas absorption device is communicated with the primary exhaust gas absorption device. The exhaust gas treatment device is communicated with the secondary exhaust gas absorption device. The production system of germanium tetrachloride for the optical fiber improves the rectifying purity of the germanium tetrachloride for the optical fiber enormously by arranging a plurality of rectification units and improves the reliability of the sealing and maintains the pressure balance in the system by arranging the primary exhaust gas absorption device and the secondary exhaust gas absorption device and can evacuate the exhaust gas finally produced by the production system through the exhaust gas treatment device by arranging the exhaust gas treatment device.

The invention discloses a method for producing germanium tetrachloride for optical fibers, which includes the steps: hydrochloric acid and germanium tetrachloride with a volume ratio of 0.25-2.0: 1 are added into a distiller to be distilled; or while separately distilling the germanium tetrachloride, HCI gas is pumped in until the distilling is finished with the distilling temperature of 76-80 DEG C; after the distilled solution is separated by a hydrochloric separator, the germanium tetrachloride solution is stored in a storage tank to be discharged to an empty tower distiller for 36-72 hours of standing; temperature of the germanium tetrachloride solution is raised to 70-75 DEG C; while continuous pumping nitrogen for 12-36 hours, an ultraviolet lamp is adopted for lighting; finally, distillation operation is carried out at 76-80 DEG C and the product is transferred. The method for producing the germanium tetrachloride for optical fibers has the advantages of simple process course and convenient operation which can remove the impurity containing hydrogen in the germanium tetrachloride with high value for industrial use.

A method is provided for producing GeCl₄ with or without SiCl₄ from optical fibers, the method comprises the steps of: reacting comminuted optical fibers including germanium and optionally silicon oxides with a reagent including a solid carbonaceous reducing agent, chlorine and a boron compound to obtain a gaseous product including gaseous GeCl₄, gaseous SiCl₄, and gaseous BCl₃ in accordance with the reactions: 2BCl₃(g)+1.5GeO₂=1.5GeCl₄(g)+B₂O₃; 2BCl₃(g)+1.5 SiO₂=1.5 SiCl₄(g)+B₂O; B₂O₃+1.5C+3Cl₂=2BCl₃(g)+1.5CO₂; and then condensing the gaseous GeCl₄, BCl₃ and optionally SiCl₄ into liquid GeCl₄, BCl₃ and optionally SiCl₄. The invention further provides a method for producing SiCl₄ (and optionally GeCl₄) from glass residues obtained from optical fiber manufacturing and wasted optical cables. The method includes the steps of: reacting comminuted glassy residues with a reagent including a solid carbonaceous reducing agent, a salt, a boron compound to obtain a gaseous product including SiCl₄, BCl₃, and optionally GeCl₄; and then condensing the gaseous SiCl4, BCl₃ (with or without GeCl₄) into liquid SiCl₄, BCl₃ and GeCl₄. There is also provided a method for producing SiCl₄ from a SiO₂ containing material.

A reactor, a plant, and a continuous, industrial process carried out therein for preparing high-purity silicon tetrachloride or high-purity germanium tetrachloride by treating the silicon tetrachloride or germanium tetrachloride to be purified, which is contaminated by at least one hydrogen-containing compound, by a cold plasma and isolating purified high-purity silicon tetrachloride or germanium tetrachloride from the resulting treated phase by fractional distillation. The treatment is carried out in a plasma reactor in which longitudinal axes of a dielectric, of a high-voltage electrode, and of a grounded, metallic heat exchanger are oriented parallel to one another and at the same time parallel to the force vector of gravity.

The invention provides a method for producing germanium dioxide by utilizing germanium-containing wastes. The method is characterized by comprising the following steps: directly adding the germanium wastes into a concentrated hydrochloric acid containing ferric trichloride; using chlorine as a shielding gas and adopting a rectifying column for distilling and purifying germanium tetrachloride; preparing germanium dioxide by performing totally closed hydrolysis reaction on the purified germanium tetrachloride; washing the hydrolysate and drying, thereby acquiring dry germanium dioxide; and adding the germanium wastes into a return fluid after completing distillation, thereby continuously producing. The germanium tetrachloride can be continuously produced in the manner of adding the germanium wastes into the concentrated hydrochloric acid containing ferric trichloride, and then adding chlorine for oxidizing, distilling and preparing germanium tetrachloride and adding the germanium wastes after completing the distillation; the usage of acid and hydrogen peroxide can be saved; the distilling return fluid can be repeatedly reused; and no distilling waste acid is generated.

The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering germanium from coarse germanium dioxide by sodium chlorate oxidization arsenic removal and hydrochloric acid chlorination distillation. The process method for improving the chlorination distillation recovery rate of the coarse germanium dioxide recovers the germanium by a hydrochloric acid distillation method. The method is characterized in that: the process steps of sodium hydroxide dissolving and the sodium chlorate arsenic removal are added before the hydrochloric acid distillation; and by the process of the method, the recovery rate of the germanium can reach over 99.0 percent, the content of arsenic in produced germanium tetrachloride is below 10.0 ppm, the recovery rate of the germanium is 9.0 percent higher than that of the conventional hydrochloric acid direct distillation method, the content of the arsenic in the produced germanium tetrachloride is 10 to 15 percent lower than that of the conventional hydrochloric acid direct distillation method, and the distillate efficiency of the arsenic is below 1.0 percent. Processes such as rectification, hydrolyzation, precipitation, drying and the like are performed on the distilled germanium tetrachloride to produce high-purity germanium dioxide. The quality of the high-purity germanium dioxide produced by the process method meets the requirements of over 5N in national standard GB/in T11069.

The invention relates to a distillation column eliminating the CH impurity and the HCI impurity in germanium tetrachloride for optical fibers, and the distillation column is mainly used for solving the problem for eliminating the CH impurity and the HCI impurity in the germanium tetrachloride, and the distillation column belongs to the field of special equipment. The distillation column is mainly composed of a column reactor, a column pipe and a column head. The column head is provided with a spiral cooling pipe, a cooling water inlet and a cooling water outlet, and the top of the column head is provided with a gas exit. A pipeline which is linked with a swinging head discharging port is arranged on the gas exit, and the lower part is pumped in the bottom of the column head. The bottom of the swinging head discharging port is provided with the pipeline to be pumped in the upper part of the column pipe, and the column reactor is provided with a feed port, a gas supply port, a temperature monitoring port and a waste discharge port.

The invention discloses a distillation device for producing high-purity germanium tetrachloride. The distillation device includes a distillation tank and a condensation tank. A material inlet and a first gas inlet are arranged on one side of the distillation tank and a second gas inlet is arranged on the other side of the distillation tank; a gas outlet is arranged on the top of the distillation tank; a spiral shaft is vertically disposed in the axial center in the distillation tank and is provided with a plurality of infrared heating blocks which are uniformly arranged spirally on the external wall of the spiral shaft in the vertical direction; an infrared heating jacket is disposed on the bottom of the distillation tank; a temperature detector is disposed in the infrared heating jacket; the top of the distillation tank is connected to the condensation tank through a first gas outlet pipe; a spiral condensing pipe is arranged in the condensation tank; a second gas outlet pipe and a third gas outlet pipe are arranged on the condensation tank, wherein the second gas outlet pipe is connected to the second gas inlet. The distillation device is high in heating speed and has good temperature control effects.

The invention provides a recovery method of selenium-germanium-sulfur. The recovery method comprises the following steps: S1) crushing the selenium-germanium-sulfur glass, then performing ball milling, and obtaining glass powder; S2) mixing the glass powder, hydrochloric acid and concentrated sulfuric acid, extracting, adding an oxidant in the extraction process until the potential rises to 200 to400 mV, filtering, and obtaining a solution after the primary selenium deposition and crude selenium; S3) performing the chlorination distillation for the solution after the primary selenium deposition, and obtaining a solution after the distillation and germanium tetrachloride; S4) mixing the solution after the distillation and a reducing agent, reacting, filtering, and obtaining crude selenium.Compared with the prior art, by controlling the potential in the oxidation extraction process, the oxidation process is controlled, so that the selenium in the selenium-germanium-sulfur glass is oxidized from bivalence to zero valence, the element selenium is obtained, the selenium and the germanium are effectively separated, the selenium can be recovered by virtue of various ways, and the recovery rate is higher.

The invention relates to the technical field of hydrometallurgy, in particular to a technological method for purifying and preparing high pure germanium tetrachloride and removing organic impurities. The technological method is implemented according to the following steps: adding crude germanium tetrachloride, produced by carrying out chloridizing distillation on germanium concentrate, into concentrated sulfuric acid, and carrying out predistillation while heating; adding analytically pure hydrochloric acid into germanium tetrachloride produced by the predistillation, introducing chlorine, and carrying out primary re-steaming; carrying out secondary re-steaming on the germanium tetrachloride produced by the primary re-steaming by repeating the step (2) ; adding concentrated sulfuric acid into germanium tetrachloride produced by the secondary re-steaming, and then carrying out secondary digestion distillation; transferring germanium tetrachloride produced by the secondary digestion distillation, adding analytically pure concentrated sulfuric acid into the transferred germanium tetrachloride, heating and purifying by rectification. The method is used to realize the aim of further removing organic impurities while efficiently purifying the germanium tetrachloride, and solve the problems that products of a method, which takes germanium-containing lignite as a raw material and adopts the conventional production technology to prepare the high pure germanium tetrachloride, are not qualified, and the like.

The invention discloses a process for producing germanium tetrachloride by regenerated germanium. According to the process, regenerated germanium raw materials are added into hydrochloric acid solution containing FeCl2 catalysts, chlorine is continuously led in to perform chlorination, and germanium tetrachloride products are recovered by distillation separation after chlorination. The process issimple and low in energy consumption and cost, waste acid closed recycling is effectively realized, environmental problems are solved, the recovery rate of the regenerated germanium raw materials is increased, and higher economic values are generated.

The present invention provides a light valve containing ABX₃ perovskite particles; more specifically is related to a light valve containing halide ABX₃ perovskite particles that can control light transmittance. The preferable halide ABX₃ perovskite particles in this invention consist of A being at least one of Cs⁺, CH3NH3⁺, and Rb⁺, B being at least one of Pb²⁺, Ge²⁺, and Sn²⁺, and X being at least one of Cl⁻, Br⁻, and I⁻. This kind of halide ABX₃ perovskite particles were suspended in a liquid suspension to make a light valve with a light transmittance control, which discloses a completely new application for ABX₃ perovskite materials.

Disclosed herein is a zero-dimensional hybrid organic-inorganic perovskite material of Formula (I) wherein A contains at least one aromatic or heteroaromatic ring, M is selected from Ge, Pb, Sn, Mn, Cu, Co, and Eu, and X is a halide or pseudohalide. Preferably, M is Sn, and the organic part is meta-xylenediammonium. Also disclosed herein is a method of preparing said materials and the use of saidmaterials for white light emitting devices.

The invention relates to a device separating hydrochloride which is mingled with germanium tetrachloride in the production of germanium tetrachloride for optical fibers, and the device belongs to a production device of the germanium tetrachloride for optical fibers. A separating device is mainly composed of a main separation column, a feed pipe, a tail gas discharge pipe, an atmosphere supply pipe, an acid discharge pipe and a discharging pipe. The top of the main separation column is connected with the feed pipe, the lateral part of which is connected with the tail gas discharge pipe, and the upper side of the main separation column is connected with the acid discharge pipe. The intermediate section of the main separation column is connected with the discharging pipe, a pipe orifice of which extends to the bottom of the main separation column, and the feed pipe is connected with the atmosphere supply pipe, the lateral part of which is communicated with the acid discharge pipe and the feed pipe respectively through two independent pipelines. When the device operates, the real-time separation process can be observed, and the hydrochloride and the germanium tetrachloride can be effectively separated. The whole separation process is isolated from air, thereby avoiding the secondary pollution of the product, and the device has the advantages of simple structure, convenience and practicality and high efficiency.

The invention discloses a novel extraction process method for purifying germanium tetrachloride. Purification is the subject of the germanium metallurgical industry. The method is combined with an extraction theory, and a novel germanium tetrachloride purification process is researched through experiments. The dissolving situations of substances such as AsCl3 and the like in hydrochloric acid and GeCl4 differ greatly, and the aim of purifying GeCl4 can be fulfilled by extracting substances such as AsCl3 and the like in crude GeCl4 by taking the hydrochloric acid as an extracting agent. Conventional extraction is used for extracting active ingredients in a mixture. In recent years, an extraction method is used for purification. Full and effective mixing of the extracting agent and an extracted substance is a relatively key problem. High-speed spray is an effective method which can fully mix the extracting agent and the crude GeCl4. The experiments prove that the quantity of low-resistance germanium ingots can be reduced greatly by adding the process into the conventional technical condition, so that product percent of pass is increased to 90 percent.