Abstract: Methods and devices are disclosed for reacting and separating components. An elongated vessel has a microchannel heat pipe with a hollow space inside the microchannel heat pipe being surrounded by inner walls. A feed stream and a reactant stream are passed into the hollow space, the reactant reacting, resulting in a product stream. A first end of the microchannel heat pipe is heated and an opposite end of the microchannel heat pipe is cooled, producing a gas phase and a liquid phase in reflux. The liquid phase attaches to the inner walls via capillary forces and the vapor phase makes up the balance of the hollow space. The reflux separates components in the product stream, a first portion passing out of a first end of the heat pipe as a liquid stream and a second portion passing out of a second end of the heat pipe as a vapor stream.

Abstract: Process for the removal of plutonium polymer and ionic actinides from aqueous solutions by absorption onto a solid extractant loaded on a solid inert support such as polystyrenedivinylbenzene. The absorbed actinides can then be recovered by incineration, by stripping with organic solvents, or by acid digestion. Preferred solid extractants are trioctylphosphine oxide and octylphenyl-N,N-diisobutylcarbamoylmethylphosphine oxide and the like.