Abstract: A method of distilling a liquid containing dimethyl sulfoxide using a distillation system, including mixing sodium carbonate with a liquid containing dimethyl sulfoxide at a bottom of the distillation system such that sodium carbonate accounts for 0.005% to 25% by weight relative to 100% by weight of the liquid containing dimethyl sulfoxide and sodium carbonate in total at the bottom of the distillation system and heating the bottom; and obtaining a distillate containing dimethyl sulfoxide at a position lower than a position at which the liquid containing dimethyl sulfoxide is introduced and higher than a position of the heating portion.

Abstract: A method of distilling a liquid containing dimethyl sulfoxide using a distillation system, including mixing sodium carbonate with a liquid containing dimethyl sulfoxide at a bottom of the distillation system such that sodium carbonate accounts for 0.005% to 25% by weight relative to 100% by weight of the liquid containing dimethyl sulfoxide and sodium carbonate in total at the bottom of the distillation system and heating the bottom; and obtaining a distillate containing dimethyl sulfoxide at a position lower than a position at which the liquid containing dimethyl sulfoxide is introduced and higher than a position of the heating portion.

Abstract: A method of purifying dimethyl sulfoxide includes distilling a dimethyl sulfoxide-containing liquid in the presence of sodium carbonate under a reduced pressure in an inert gas atmosphere to distill out dimethyl sulfoxide, an amount of the sodium carbonate with respect to 100 g of pure dimethyl sulfoxide in a residual liquid after the distillation being 6 times or more the amount of the sodium carbonate with respect to 100 g of the pure dimethyl sulfoxide in the dimethyl sulfoxide-containing liquid before the distillation.

Abstract: A method of purifying dimethyl sulfoxide includes distilling a dimethyl sulfoxide-containing liquid in the presence of sodium carbonate in an inert gas atmosphere to distill out dimethyl sulfoxide, an amount of the sodium carbonate with respect to 100 g of pure dimethyl sulfoxide in a residual liquid after the distillation being 6 times or more the amount of the sodium carbonate with respect to 100 g of the pure dimethyl sulfoxide in the dimethyl sulfoxide-containing liquid before the distillation.

Abstract: A method of purifying dimethyl sulfoxide includes distilling a dimethyl sulfoxide-containing liquid in the presence of sodium carbonate in an inert gas atmosphere to distill out dimethyl sulfoxide, an amount of the sodium carbonate with respect to 100 g of pure dimethyl sulfoxide in a residual liquid after the distillation being 6 times or more the amount of the sodium carbonate with respect to 100 g of the pure dimethyl sulfoxide in the dimethyl sulfoxide-containing liquid before the distillation.

Abstract: Disclosed is a processing method of a plurality of films that are used as substrates for liquid crystal display element(s). In the present processing method, each film is set to a film holder that has frame like shape and holds the film at its periphery. The film holders with the films are sequentially processed in a sequential process. On the other hand, the film holders with the films are set in a magazine cassette, and then the magazine cassette is simultaneously processed in a batch process.