Technological method for purifying and preparing high pure germanium tetrachloride and removing organic impurities

Abstract

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.

Description

technical field

[0001] The invention relates to the technical field of hydrometallurgy, in particular to a process method for removing organic impurities and purifying to prepare high-purity germanium tetrachloride. Background technique

[0002] Optical fiber communication has become one of the main pillars of the modern communication era. The application of fiber grade germanium tetrachloride in the production of optical fibers, replacing silicon with germanium not only expands the wavelength range of transmitted light, but also further reduces the loss of light in the transmission process. Increase the transmission distance of the signal. The purity of germanium tetrachloride directly affects the quality of the optical fiber and the transmission of optical signals. The quality of high-purity germanium tetrachloride is mainly judged by the content of metal impurities and the infrared transmittance. The non-ferrous metal industry standard (YS / T 13-2007) divides high-purity...

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