| 摘要 |
The present invention relates to a complexing agent and preparation method and use thereof, the complexing agent has a general formula MxHyPnO3n+1Rz, wherein M is any one or more of alkali metal ions and NH4+; R is acyl; x, n and z are positive integers, y is 0 or a positive integer and x+y+z=n+2. A preparing method of a complexing agent comprises: mixing alkali, carbonate or bicarbonate containing M, phosphoric acid and an acidic salt of monoprotic organic acids or polybasic organic acids containing an R group for reacting according to a molar ratio, then carrying one step polymerization on a reaction solution at 100-800° C. for 0.5-10h to obtain a finished product of the complexing agent; or drying the reaction solution firstly, and then polymerizing at 100-800° C. for 0.5-10h to obtain a finished product of the complexing agent. The complexing agent of the present invention is used for producing an electroplating solution and is convenient in machining, the prepared electroplating solution has high complexing capacity for metal, a complexing constant for copper ions is up to 1026-27 and far superior than that of the cyanide-free complexing agents in the prior art, and since the electroplating solution prepared from the complexing agent is good in quality and good in dispersity, a process current density range that can be adopted is wider and the electroplating solution has a wide application range. |
