Specific features of operation of a reaction-rectification column in different feed modes

Various feeding modes (discrete and distributed) into a reaction-rectification column for production of ethylene glycol are analyzed.     

A process for production of granulated soluble glass in ore-thermal furnaces

A process for production of soluble sodium glass in electric-arc ore-thermal furnaces with three graphite electrodes was suggested and tested on the industrial scale. Fusion of sand with sodium carbonate, followed by rapid cooling of the fusion cake with cold water, yields finely grained sodium metasilicate with a developed network of microcracks as a result of a thermal impact in the course of aqueous granulation of the fusion cake.     

Experimental proof for a quasi-one-dimensional band structure of V3Si

A positron annihilation experiment on V₃Si in the [100] direction is presented. It shows that the Fermi surface (FS) contains planar sections, proving the q-1-D nature of the electronic band structure. One possible way to account for the positions of the planar sections, is by a band structure with a FS at $\text{～ 0.9}\text{π}\text{a}$, belonging to the σ-band (m_l = 0) and a δ₂-band (m_l = ±2) with a density of states peak just below the Fermi level, which yields planar sections of the FS at $\text{～ 0.2}\text{π}\text{a}$ and $\text{～ 0.6}\text{π}\text{a}$, in agreement with a LCAO calculation.