The Determination of Calcium Carbide and its Dissociation Products in Fused Calcium Chloride

Abstract

The principal constituents in molten solutions of calcium carbide in calcium chloride have been determined. The analytical results were generally within order of magnitude agreement with calculations from thermodynamic data based upon a model in which the calciumcarbideis thought to be dissociated according to the equationOn a Btabli la nature des principaux constituants des solutions fondues de carbure de calcium dans le chlorure de calcium. Les rdsultats analytiques sont g6nCralement en accord tt I'intQieur d'une ordre de grandeur-avec les donnks thermodynamiques basks sur un modkle dans lequel on croyait que le carbure de calcium est dissociB suivant 1'Bquation

Phase Relationships in the Calcium Chloride – Calcium Carbide System

“…(6). This is a development of the method proposed by Edwards (7) and used later by Morris and Harry (8).…”

Titanium production in rotationally symmetric electrochemical reactors

“…This leads to the chemical reaction of Ca with the anodic off-gases (Fig. 8) and the graphite anode leading to erosion of the anode according to CaC 2 $ Ca + 2C [17]. Also, the high surface area annulus anodes generate significant [19] and the slowing of oxide ion transport by the blocky microstructure of CaTiO 3 [8] led to uncertainty in measuring the thickness of Ti layers L th at >2 h. Scales bars: 1 mm.…”

Galvanic Cell Studies Involving Calcium Carbide Solutions

“…In this paper we present evidence that the galvanic cell is more complex than is implied by [I]; that it is more accurately represented by anode Fe[C] (s) I Ca, CaC2, CaCl2(1), a'c ] a'ca Ca I C(s) cathode a"ca I a"c [II] This evidence is founded upon a thermodynamic argument (6) . > CaC2, CaC12(D C(s) CaC2(sat) carbon electrode a"c a"ca in which the calcium electrode and carbon electrode were introduced into the electrolyte alternately.…”

“…Samples of the electrolyte were analyzed for calcium carbide, oxide, chloride, calcium metal, and carbon according to the procedure of Aksaranan et al (6). The samples were taken either by drilling the solidified electrolyte as quickly as possible to minimize contact with air, or by use of a graphite sampling crucible which could be dipped into the melt and withdrawn.…”

“…[6] that the magnitude and sign of the carbon flux is determined by the relative magnitudes of a'c and a"c. In the simplest case with a"c ----1 (graphite crucible-cathode) the carbon flux is to the austenite anode. [6] that the magnitude and sign of the carbon flux is determined by the relative magnitudes of a'c and a"c. In the simplest case with a"c ----1 (graphite crucible-cathode) the carbon flux is to the austenite anode.…”