Device and method for directly oxidizing sulfur ions by copper ions
A technology for oxidizing sulfur and copper ions, which is applied in the preparation/purification of sulfur, etc., can solve the problems that cannot be realized, and achieve the effect of simple equipment, easy-to-obtain materials, and the realization of waste resources
Active Publication Date: 2017-07-04
HUNAN UNIV OF SCI & TECH
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Obviously, this reaction phenomenon is due to the fact that the precipitation reaction rate is faster than the redox reaction rate. Practice has proved that it is impossible to realize Cu 2+ direct oxidation of S 2- of
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[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0020] see figure 1 , the device of copper ion direct oxidation sulfur ion of present embodiment comprises small beaker 1, is placed with two bottomless test tubes 2 in small beaker 1; The bottom test tube is sealed by the jelly after the saturated potassium chloride agar fluid 3 is solidified; the copper sulfate solution 4 and the saturated sodium sulfide solution 5 with a concentration of 1mol / L are respectively loaded into the two bottomless test tubes 2; the two ends of the wire 6 Each is connected with a graphite inert electrode 7 , and the inert electrodes 7 at both ends of the wire 6 are respectively inserted into the copper sulfate solution 4 and the sodium sulfide solution 5 of the two bottomless test tubes 2 . From figure 1 It can be seen in the figure that an ammeter 8 is connected to the wire 6 connecting the two inert electrodes...
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The invention discloses a device and method for directly oxidizing sulfur ions through copper ions. The device comprises a small beaker. Two bottomless test tubes are placed in the small beaker. The small beaker contains saturated potassium chloride agar fluid. The bottoms of the two bottomless test tubes are sealed by jelly obtained after the saturated potassium chloride agar fluid is cured. The two bottomless test tubes contain a copper sulfide solution and a sodium sulfide solution respectively. The two ends of a wire are each connected with an inert electrode. The inert electrodes at the two ends of the wire are inserted into the copper sulfide solution and the sodium sulfide solution of the two bottomless test tubes respectively. Obviously-red solids exist on the end face of the lower portion of the electrode inserted into the copper sulfide solution. The solids are metal copper Cu obtained after copper ions Cu2+ is reduced. The sodium sulfide solution becomes yellow gradually. The color yellow is the color of polysulfide ions Sn2- generated through a slow reaction of sulfur ions S2- and elemental sulfur S obtained by oxidizing the sulfur ions S2-. The device is high in reliability, the phenomenon is obvious, medicine and materials are easy to obtain, the device is simple, and safety is high.
Description
technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a device and a method for directly oxidizing sulfur ions by copper ions. Background technique [0002] In chemical theory, the electrode potential higher than In principle, mix copper sulfate solution with sodium sulfide solution, Cu 2+ can directly oxidize S 2- Forming elemental sulfur S and itself being reduced to metallic copper Cu: Cu 2+ +S 2- =Cu+S. However, in the experiment, there was no redox reaction at all and no redox reaction occurred, but a precipitation reaction occurred: Cu 2+ +S 2- =CuS↓(black), the chemical reaction can be found in: ① Beijing Normal University, Central China Normal University, Nanjing Normal University, Inorganic Chemistry [M], 3rd edition, Beijing: Higher Education Press, 1993, p. 791. ②Jilin University, Wuhan University, Nankai University, Inorganic Chemistry (Volume 2) [M], 3rd edition, Be...
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IPC IPC(8): C01B17/06
CPCC01B17/06
Inventor 李大塘谢慧翔龙承韵申云萍邓望孙冉
Owner HUNAN UNIV OF SCI & TECH