Experimental Simulation Study Of Organic Matter In The Role Of Uranium Mineralization Process

Petroleum, natural gas, coal and uranium can coexist, enrich and deposit in the same sedimentary basin, their origin and distribution have a reciprocal impact. It shows that the discovery of a mineral resource implied some important information, such as the existence of other energy source. In the sedimentary basin, under the condition of high temperature and high pressure, the rich organic matters in the oil and coal inevitably react with uranium mine. From the chemical point of view, the relationship between the uranium deposits and organic matter are coordination and reduction. The humic acids could coordinate to uranium and form complexes to deposit and transfer; the high valence uranium could be reducted to the low valence uranium by the hydrocarbons of oil and gas which deposits to mine. In laboratory conditions, the hydrothermal reaction was used to simulate the reaction of organic matter with uranium. The results obtained by chemical simulation can confirm the interaction between them and provide a theoretical basis for the geological survey.We used simple aromatic organic acids to replace humic acids react with uranium ion under the hydrothermal condition to simulate its coordination role. More than 20 kinds of uranium complexes were gained and four complexes' crystal structures were gained also. Research shows that these complexes are stable in solution and air, it is speculated that uranium may be in the form of complex in the transfer process. We use the oil distillate and petroleum components react with uranyl ion under solvothermal condition. The products prove the reduction of organic matter on uranium by X-ray powder diffraction.In addition, under hydrothermal conditions, we also took advantage of multi organic acids to synthesize a series of metal coordination polymer. A mixed metal complex (Ag-Co-PDC) shows a new PDC coordination configuration that has not yet been reported.