Alkali metal iodide salt solution and method for producing the same

Example 1

[0065]First, a liquid composed of components shown in Table 1 below was prepared. Moreover, in Example 1 and Example 2, components of compounds shown in the tables are measured by the following methods.

(Sodium Iodide)

[0066]Sodium iodide was measured by a titration method in which an aqueous 0.1N AgNO3 solution is used as a reagent.

(Triphenylphosphine Oxide)

[0067]Column: TOSOH ODS-80TM 4.6×150 mm

[0068]Column temperature: 40° C.

[0069]Carrier:acetonitrile:water=4:6 (v:v) (TEA-AcOH 0.1 vol %)

[0070]Flow rate: 1.0 mL / min

[0071]Detection wavelength: 230 nm

[0072]Internal Control: dimethyl phthalate

(Methanol, Dimethylformamide, Isobutanol, and Water)

[0073]Column: chromosolve 102, 1.1 m

[0074]Column temperature: 70° C.→20° C. / min→200° C. (13 min)

[0075]Carrier: He (40 mL / min)

[0076]Detection: TCD (75 mA)

[0077]Internal Control: acetonitrile

TABLE 1Sodium iodide (NaI)14.0 gMethanol (MeOH)12.6 gDimethylformamide (DMF)76.4 gIsobutanol (i-BuOH)30.6 gTriphenylphosphine oxide (TPPO)19.6 gWate

Example 2

[0080]A liquid, which is composed of components shown in Table 3 below, was prepared.

TABLE 3Sodium iodide (NaI)2.9 kgMethanol (MeOH)2.7 kgDimethylformamide (DMF)15.8 kg Isobutanol (i-BuOH)6.1 kgTriphenylphosphine oxide (TPPO)4.0 kgWater (H2O)3.5 kg

[0081]A reduced-pressure distillation was performed on the liquid to remove the solvent, under the condition of: 13 kPa; steam temperature in a range of 45° C. to 85° C. With this, MeOH 2.7 kg, DMF 11.7 kg, i-BuOH 6.1 kg, and H2O 2.3 kg were distilled off. Next, water of 80° C. was added by 26.2 kg as a deposition solvent. With this, TPPO was deposited and the deposited TPPO was filtered. Through the operation, a liquid for combustion was obtained. Table 4 below shows the composition of the liquid at the time.

TABLE 4Sodium iodide (NaI)2.77 kg (residual rate 95.0%)Methanol (MeOH) 0.0 kg (removal rate 100%)Dimethylformamide (DMF)4.14 kg (removal rate 73.8%)Isobutanol (i-BuOH) 0.0 kg (removal rate 100%)Triphenylphosphine oxide (TPPO)0.0