A kind of solid-phase reaction directly synthesizes the method for high-purity pyridoxite

Abstract

The invention discloses a method for directly synthesizing high-purity chalcoxite by solid-phase reaction, using analytically pure copper sulfide and analytically pure arsenic disulfide according to a molar ratio of 6:1, weighing them, grinding them and mixing them uniformly as starting materials ; The mixture powder is pressed into a cylinder, and the end face is covered with a sulfur powder disc, and the platinum-graphite double sample chamber is sealed in order of the sulfur powder disc-mixture cylinder-sulfur powder disc to form a sample, and placed in h-BN In the tube, h-BN is used as the pressure transmission medium; the high-temperature and high-pressure reaction is carried out in a six-sided top press, and the reacted cylindrical sample is taken out, polished, ultrasonically cleaned and air-dried, and then stored in an inert gas atmosphere. The obtained sourite is a single phase without impurities.

Description

technical field [0001] The invention relates to a method for directly synthesizing high-purity arsenite by solid phase reaction, which belongs to the field of mineralogy research. Background technique [0002] Copperite is a common copper-arsenic sulfide mineral, which is often in the form of columnar, plate-like or granular aggregates and is enriched in chalcopyrite, bornite and other sulfides in porphyry copper deposits of hydrothermal origin. One of the important mineral raw materials for extracting copper and arsenic. Due to its stable chemical properties, arsenite forms a protective film of oxides and complex sulfides in the air to prevent the interior from being oxidized, and is classified as one of the most difficult sulfide minerals to handle. The composition of natural chalcopyrite is very complex, and often contains microscopic inclusions of paragenetic minerals such as chalcopyrite and bornite. Due to the lack of standard samples of high-purity triadolite, the q...

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Problems solved by technology

Therefore, although the vacuum tube can avoid the oxidation of sulfide, since the open system cannot solve the problems of desulfurization reaction and volatilization of sulfur element, it is actually difficult to carry out the solid-state reaction according to the ideal ratio of sulphurite, and the purity of the product cannot be guaranteed.