摘要:
A process for the separation of molybdenum present in a sulfuric solution, in which the sulfuric solution is placed in contact with a stationary phase whose active group contains an oxime group, and the stationary phase is eluted using an alkaline solution.
摘要:
The present invention relates to a new process of heap leaching and comprises the following steps:(a) preparing the ground to receive the heap;(b) forming the heap;(c) sinking injection wells into the heap;(d) injecting the leaching solution by means of injection wells; and(e) recovering the leaching solution at the base of the heap, or by pumping from wells neighboring those used for injection.
摘要:
New diphosphonic derivatives are capable of extracting the uranium in phosphoric acid with a P205 content ranging from 10 to 50 per unit.The new diphosphonic derivatives have the following formula: ##STR1## wherein R is selected from the group consisting of hydrogen and alkyl radicals having 1 to 15 carbon atoms and having at most 2 branchings in the alkyl radical, and A is a mono- or di- substituted methylene radical wherein the substituents are selected from the group consisting of an alkyl group having at most two branchings, hydroxyl, an amino group, and hydrogen, wherein the total number of carbon atoms in the R and A groups is from 15 to 50 carbon atoms, with the proviso that when A is substituted by hydroxy or amino. A has 15 to 25 carbon atoms, and wherein A is linked to a water insoluble crosslinked ion exchange resin skeleton.
摘要:
A device for measuring radioactivity for a machine for use in the extraction of radioactive ore and including at least one moving receptacle (18) suitable for containing a load of ore. The device comprises a rod (120) having its top end hinged to the machine in such a manner as to leave the rod free to swing in at least one vertical plane, the bottom end of the rod having a radioactive radiation detector (122) covering a determined solid angle, the device further including displacement means (140, 166) for bringing the rod and the receptacle in reproducible manner into a mutual disposition such that the load of ore contained in the receptacle occupies a substantial portion of the solid angle of the detector. An arm (110) is preferably provided between the rod and the machine.