194 results about "Cesium ions" patented technology

This invention is a multi-beam charged particle instrument that can simultaneously focus electrons and a variety of positive and negative ions, such as Gallium, Oxygen and Cesium ions, onto the same material target. In addition, the instrument has provision to simultaneously capture the spectrum of both secondary electrons and ions. The highly dispersive, high resolution mass spectrometer portion of the instrument is expected to detect and identify secondary ion species across the entire range of the periodic table, and also record a portion of their emitted energy spectrum. The electron energy spectrometer part of the instrument is designed to acquire the entire range of scattered electrons, from the low energy secondary electrons through to the elastic backscattered electrons.

The invention relates to a decontamination method and an apparatus for solid-state material contaminated by radiocesium. The decontamination method for solid material contaminated by radiocesium, comprising bringing the solid-state material containing radiocesium into contact with a first processing solution and preferably eluting cesium ion from the solid-state material to the liquid phase in the presence of potassium ion or ammonium ion.

The invention relates to a catalyst for synthesizing ethylenimine as well as a preparation method and application thereof. The related catalyst comprises a carrier and metal ions loaded on the carrier; the carrier is a composite oxide comprising titanium, silicon and phosphorus elements; the metal ions are magnesium ions, iron ions and cesium ions; the molar ratio of the magnesium ions to the iron ions to the cesium ions is (1-10):1:0.1; the mass of all metal ions is 0.5-10 percent of that of the carrier. The related preparation method comprises the step of roasting a catalyst precursor at the temperature of 350-650 DEG C, so that the catalyst is obtained; the catalyst precursor is the mixture of the carrier, soluble salt of magnesium, soluble salt of iron and soluble salt of cesium. The invention also provides the application of the catalyst to synthesis the ethylenimine by using amino alcohol as the raw material. Compared with a common catalyst which has the requirement on the temperature of over 400 DEG C, the catalyst disclosed by the invention obviously reduces the reaction temperature. The prepared catalyst can catalyze the intramolecular dehydration reaction of the amino alcohol and has relatively excellent selectivity.

The purpose of the present invention is to provide a method for removing cesium ions, whereby cesium ions present in aqueous solution can be efficiently separated and recovered within a brief period of time, while decreasing the number of manual operating steps and reducing the amount of cesium waste products. In this method for removing cesium ions, the cesium ions in an aqueous solution containing cesium are adsorbed by a water-soluble adsorbent, the water-soluble adsorbent having adsorbed the cesium ions is transformed into a water-insoluble magnetic complex in the presence of magnetic particles, and the magnetic complex is magnetically separated to remove the cesium ions in the aqueous solution.