Plutonium trichloride

Plutonium trichloride, PUCI3, is the only known binary chloride of plutonium. No higher chloride in the soHd state has been prepared so far. The trichloride is a blue-green soHd and can be prepared from the reaction of Pu metal or PUO2, and HCl gas at elevated temperatures, and can be purified by sublimation and zone melting. The yellow complex chloride, CS2PUCI3, is stoichiometric, stable, and can be used as a primary analytical standard for plutonium (156). 

Another example of the use of carbon tetrachloride for chlorination is the conversion of plutonium dioxide to plutonium trichloride according to the reactions... 

The conversion of plutonium dioxide to plutonium trichloride has often been carried out by using phosgene (COCl2) instead of carbon tetrachloride or carbon and chlorine ... 

Plutonium tetrafluoride, 19 689 Plutonium tribromide, 19 690 Plutonium trichloride, 19 690 Plutonium triiodide, 19 690 Plutonium-uranium-oxygen system, 25 423-424... 

Plutonium trichloride. Although PUCI3 is more hygroscopic than the plutonium fluorides, and although it generates less heat of reaction in subsequent metallothermic reduction to the metal. 

Another procedure extensively used for the preparation of plutonium trichloride is the reaction of plutonium oxalate with hydrogen chloride. 

Freeman and Smith (32) have prepared the anhydrous chlorides of a number of lanthanides and of thorium by dehydrating the hydrated chlorides with thionyl chloride. Although efforts to obtain anhydrous plutonium trichloride in this way were unsuccessful, it is believed that this may be a useful procedure for actinide elements such as actinium, americium, and curium that have a particularly stable (III) oxidation stage. In general, aqueous methods for preparing tetrachlorides are of little value but anhydrous trichlorides, particularly of the transuranium elements, can be obtained readily from the hydrated trichlorides by dehydration in an atmosphere of hydrogen chloride. 

Pb4Si06 TETRALEAD SILICATE 1302 PuCI3 PLUTONIUM TRICHLORIDE 1345... 

Phosgene can be employed in a variety of metal-recovery operations, eg, in the recovery of platinum, uranium, plutonium, and niobium (69—73). Phosgene has been proposed for the manufacture of aluminum chloride, beryllium chloride, and boron trichloride (74—76). Phosgene has been patented as a stabilizer, either by itself or in combination with thionyl chloride, for Hquid SO2 (77). 

In this process, uranium metal is electrodeposited at the cathode, while plutonium and other transuranium elements remain in the molten salt as trichlorides. Plutonium is reduced in a second step at a metallic cathode to produce Cd—Pu intermetallics. The refined plutonium and uranium metals can then be refabricated into metallic fuel (137). 

Mercury(II) /V-pcrchlory lbcnzylamidc. 3651 Monopotassium perchlorylamide, 3994 Nitrogen triiodide-silver amide, 4634 Nitrosylruthenium trichloride, 4144 Pentaamminedinitrogenruthenium(II) salts, 4596 Pentakis(dimethylamino)tantalum, 3384 Pentasilver diamidophosphate, 0046 Pentasilver orthodiamidophosphate, 0044 Plutonium nitride, 4726 Poly (dimercury immonium hydroxide), 4422... 

Plutonium scsquisultidc may be prepared by prolonged treatment of die dioxide 111 a. graphite crucible with anhydrous hydrogen sulfide at l,340°-l,400°C, or by the reaction of the trichloride with hydrogen sulfide at 900, ,C. 

---