Waste-free technology of deironization of acidic water

A new technology of deironization of natural and waste acid waters has been developed. Lime wastes of building material production are used as a reagent. The effect is achieved by introducing 3–4 g/dm³ of pulverized wastes (chippings) with a fraction ～0.1 mm to the water during its continuous stirring for 1–5 h (depending on the water composition and limestone) and initial aeration 10–20min. The technology is waste-free including a new method of dehydration of the sediment that forms and which may be employed, in particular, in nonferrous metallurgy or the production of facing plates.     

Statistical Description of the Coke Balance in a Reactor–Regenerator System Containing a Fine-Particle Catalyst

Using a statistical concept, a mathematical model is developed to describe the coke concentration in a fine-particle catalyst in a reactor–regenerator circulation system in terms of the coke concentration distribution of particles. The efficiencies of the proposed model and a perfect-mixing quasi-homogeneous model are compared.     

The synthesis and properties of several polypropargylpyridinium and polypropargylbipyridinium polyelectrolytes and their simple and complex tetracyanoquinodimethane ion-radical salts. I. Electrophysical properties

Poly(propargylpyridinium chloride), poly(propargy1-4-vinylpyridinium chloride), poly(propargyl-2,2-bipyridinium chloride), poly(propargyl-1-methyl-2,2-bipyridinium methylsulfate chloride), poly(N-ethyl-vinylpyridinium bromide), and poly(propargyl-2-hydroxyquinolium chloride) were synthesized and a number of simple and complex, tetracyanoquinodimethane ionradical polyelectrolytes were prepared from them. An attempt was made to understand how the molecular structure of these compounds manifests itself in their observed electrophysical properties. Our results show increased electroconductivity in cases of simple and complex ion-radical polyelectrolytes where the conjugated bond polymer “backbone” is in close proximity to dipyridyl polarizing side groups.     

Derivatives of hydroxyalkylthiophenols and amines as anticorrosion additives for lubricating oils

Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 5, pp. 16–18, May, 1994.