Process for manufacture of purified alkaline earth metal carbonate The invention concerns a process for the manufacture of a purified alkaline earth metal carbonate, the purified alkaline earth metal carbonate obtainable by said process, and its use in the manufacture of products and devices in the field of electronics and glass. The process comprises the steps of calcinating the alkaline earth metal carbonate with an aqueous phase comprising a salt. The alkaline earth metal carbonate might be barium carbonate or strontium carbonate.

The present invention provides an oxygen selective adsorbent containing oxides of Ba.sub.xSr.sub.(1x)Mg.sub.y(CO.sub.3).sub.(1+y) or Ba.sub.xSr.sub.(1x)CO.sub.3 particles, increasing transition oxygen partial pressure, and representing high thermal stability and excellent oxygen sorption cavity, by adding another metal such as Sr to Ba which is active element for oxygen adsorption, so as to be capable of desorbing oxygen under lower vacuum even at the same operating temperature than the existing oxygen selective adsorbent; and a preparation method thereof.

A method of manufacturing a multilayer ceramic electronic component includes: preparing a dielectric magnetic composition including base material powder particles including BaTi.sub.2O.sub.5 or (Ba.sub.(1-x)Ca.sub.x)Ti.sub.2O.sub.5 (0x0.1), the base material powder particles having surfaces coated with one or more of Mg, Mn, V, Ba, Si, Al and a rare earth metal; preparing ceramic green sheets using dielectric slurry including the dielectric magnetic composition; applying an internal electrode paste to the ceramic green sheets; preparing a green sheet laminate by stacking the ceramic green sheets to which the internal electrode paste is applied; and preparing a ceramic body including dielectric layers and a plurality of first and second internal electrodes arranged to face each other with each of the dielectric layers interposed therebetween by sintering the green sheet laminate.

Provided are a system and method for preparing barium carbonate by enhancing alkanolamine absorption and mineralization of CO2. The system includes a rotating packed bed provided with a first gas inlet, a first exhaust port, a first liquid inlet, and a first liquid outlet. An absorbent barren liquid storage container in communication with the first liquid inlet through a pipeline on which a water pump is arranged. A rich liquid storage container is in communication with the first liquid outlet through a pipeline. A saturated liquid storage container, an ultrasonic mineralization reaction device, and a mineralization feedstock storage container. The saturated liquid storage container is in communication with the rich liquid storage container and the ultrasonic mineralization reactor through a pipeline, respectively. The mineralization feedstock storage container is communicated with the ultrasonic mineralization reaction device through a pipeline on which a feeding blower is arranged.

A method for carbon dioxide (CO.sub.2) storage includes injecting a brine solution into a subterranean anhydrite-rich formation, then injecting carbon dioxide into the subterranean anhydrite-rich formation and reacting the carbon dioxide with the subterranean anhydrite-rich formation to form one or more minerals thereby sequestering the carbon dioxide in the subterranean anhydrite-rich formation. The temperature in the subterranean anhydrite-rich formation is from 300 Kelvin (K) to 365 K and the pressure in the subterranean anhydrite-rich formation is from 90 bar to 120 bar.