K + NaCl

They also carried out a similar experiment with K, NaCl and hv and monitored the D line emission from Na ... 

The equilibrium is rapidly established, at high temperature, between Na, K, NaCl and KC1. The equilibrium shifts to the products when K is continuously removed by distillation through a packed column. During operation, KC1 is melted and introduced through a trap to the column. Molten Na is fed to the bottom of the column (the lower portion of which acts as a reactor whereas the upper portion is a fractionator). K vapour is fractionated and condensed in an air-cooled condenser, with the reflux pumped back to the column. Waste NaCl is continuously removed from the bottom of the column. 

Oxides before alkali-metal evaporation were calcined at 1023 K, NaCl at 723 K... 

In the industrial production of the metal, a thermal process is presently preferred over electrolysis. The reduction of potassium chloride with metallic sodium (KCl + Na K + NaCl) was introduced in 1950. 

As found by Rinck, the equilibrium Na + KCl K + NaCl was established rapidly, even though a salt and a metal layer were formed. This attainment of equilibrium was probably aided by the partial mutual solubility of one phase into the other, which is appreciable at the high temperatures employed. 

ABSTRACT. Potential energy surfaces (PESs) of several elementary chemical reactions are investigated by ab initio calculations. Topics included are (1 spectroscopy during the K + NaCl and Na + KCl reactions, (2) f + CO charge transfer reaction, (3) photodissociation and (4) two examples of mode-selective reactions. In connection to recent experiments on each subject,... 

Relating to this problem, we studied previously the photon absorption process during the reaction K + NaCl [3]. For this system, Maguire et al. have reported evidence for absorption from the intermediate configurations of the reaction [4]. The ESs of... 

Figure 1. Scheme of absorption and emission processes during the K + NaCl reaction. 

Figure 2. Laser-dressed PES for K + NaCl (x = 700 nm). Contours are drawn for each 0.2 eV up to 1.2 eV above the ground state reactant. R1 and R2 denote the K-Cl and Na-Cl bond lengths, respectively and e is the KClNa angle.

We also have made a prediction of the absorption and emission spectra for the reverse reaction Na + KCl, since a quite different result is expected for the endothermic excited state reaction. Fig. 5 is the theoretical absorption and emission spectra. The intensity of absorption decreases as x increases. This is attributed to the behavior of the crossing seam accompanied with a shift of x that is, contrary to the normal K + NaCl reaction, the crossing seams move to the product side as x becomes longer and the chance of crossing decreases. The intensity of emission increases with the increase of x from 650 to 750 nm. However at 800 and 850 nm, the intensity reaches an upper limit as a result of the decrease in the total number of trajectories excited, since almost all the trajectories that make a transition (corresponds to absorption) become excited-state reactive. Thus a quite different emission spectrum is predicted for the reverse reaction, and this emission spectrum reflects to a large extent the transition state spectroscopy. 

Figure 4. Theoretical absorption and emission spectra for K + NaCl. The solid lines and dotted ones are the results of 5000 and 2000 trajectory calculations. E. is the initial translational energy in kcal/mol. The intensity of the emission is increased by 10 times.

Winter, K. NaCl-indizierter Crassulaceen-Saurestoffwechsel bei der Salzpflanze Mesembryanthemum crystallinum. Abhangigkeit des C02-Gaswechsels von der Tag/Nacht- Tem-peratur und von der Wasserversorgung der Pflanze. Oecologia 15, 383-392 (1974)... 

The equilibrium constant K Na /K+ = NaCl / KCl is essentially dependent on the temperature (at least in the range 3OO-6OOOC,... 

J. W. Duff and P. Brumer, Exponentiating trajectories and statistical behavior Three dimensional K + NaCl and H + ICl,... 

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