Coal, Gas, Oil, Uranium Mineralization Process Of The Experimental Simulation

It is familiar that coal, natural gas, petroleum and uranium can coexist, enrich and deposit in the same sedimentary basin, which reflects the evolvement of organic matter, the geochemical evolution of uranium (e.g. transfer, enrichment and deposit) and the result of interaction in sedimentary environment. From the chemical point of view, the relationship between the uranium deposit and organic matter are coordination and reduction. The humic acids in coal could coordinate to uranium and form complexes to deposit and transfer, the high valence uranium could be reduced to the low valence uranium, which deposits to mine, by the hydrocarbons of petroleum and natural gas. In laboratory conditions, a series of experiments were designed to simulate the reaction of organic matter with uranium. Thus, investigating the reaction mechanism by experiment simulation, test analysis and chemical mechanism not only provides the useful thought, theory and example for the research on multi-energy resources minerals in one basin, but also has the important scientific significance.Some aromatic organic acids which represent humic acids in coal, the natural gas, petroleum collected from the Ordos basin and petroleum distillate reacted with UO₂²⁺ to simulate the process of uranium mineralization. The experimentals prove the important function of coal, natural gas and petroleum in the process of uranium mineralization.1. Some aromatic organic acids were used to represent humic acid in coal, which reacted with uranyl ion via the hydrothermal condition to simulate its coordination role. More than 20 kinds of uranyl complexes were gained and five complexes' crystal structures were determined by x-ray diffractometer.2. In the low temperature, the natural gas reacted with uranyl solution. The main product was UO₂ which was tested by x-ray powder difrractometer.3. The petroleum and petroleum distillate were used to react with uranyl ion. The products were tested by x-ray powder diffractometer. The main products are U₃O₈, U₄O₉ and U₃O₇ in mixed valence.