Sb-Na-SH
Antimony alkaline wet process there is actually more complex Na + Sb-Na-S-H 2 O system, a solution of Na 3 SbO 4 crystals, crystal NaSbS 2 solution and a solid antimony present in the system Balance with solid NaSbS 2 . Figure 1 and Figure 2 are drawn by solving the exponential equation by an electronic computer.
Figure 1 Sb-S-Na-H 2 O system potential-pH diagram
25 ° C, [Sb] T = 0.5 mol ∕ L, [S] T = 2.0 mol ∕ L
Figure 2 Sb-S-Na-H 2 O system potential-pH diagram
25 ° C, [Sb] T = 0.5 mol ∕ L, [S] T = 3.0 mol ∕ L
It can be seen from Fig. 1 and Fig. 2 that Na 3 SbO 4 and NaSbS 2 have a wide stable region, that is, the actually present large solution stable region is covered by the two solid phase regions, which is related to the electrolysis with high strontium content. The crystallization occurs when the liquid cools. Since the stable region of Na 3 SbO 4 is wide, it is easy to prepare Na 3 SbO 4 crystals from Na 3 SbS 3 in an alkaline solution. This has a certain guiding significance for the research of a new product, sodium citrate. The new process for the direct preparation of sodium citrate is completed under the guidance of this theory.
Resin will be trickling on copper coil of the stator before solidified, to achieve insulation effect of the stator. The use of servo trickling module, high-accuracy scale and data traceability help avoid resin contamination on the stack. It boasts of automatic nozzle positioning, fast model changeover and resin quantitative control. The cycle time and varnishing accuracy can be customized to meet different requests.
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