Azeotropic or azeotropic-like composition comprising hydrogen fluoride and 1,1,2-trichloroethane, trans-1,2-dichloroethylene or cis-1,2-dichloroethylene
AssigneeDaikin Industries, Ltd.
InventorKazuhiro TAKAHASHI
Life of this patent
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Abstract
An object of the present invention is to provide a novel azeoropic or azeotrope-like composition that is effective for the separation of HF from 1,1,2-trichloroethane (HCC-140), trans-1,2-dichloroethylene (HCO-1130(E)), or cis-1,2-dichloroethylene (HCO-1130(Z)). The object can be achieved by an azeotropic or azeotrope-like composition comprising HCC-140, HCO-1130(E), or HCO-1130(Z), and hydrogen fluoride.
Claims12
An azeotropic or azeotrope-like composition comprising 1,1,2-trichloroethane (HCC-140) and hydrogen fluoride.
An azeotropic or azeotrope-like composition comprising trans-1,2-dichloroethylene (HCO-1130(E)) and hydrogen fluoride.
An azeotropic or azeotrope-like composition comprising cis-1,2-dichloroethylene (HCO-1130(Z)) and hydrogen fluoride.
A method of separating a mixture comprising HCC-140 and hydrogen fluoride, comprising the steps of:
- (a) supplying a composition comprising HCC-140 and hydrogen fluoride to a first distillation column;
- (b) extracting, as a first distillate, an azeotropic composition comprising HCC-140 and hydrogen fluoride, and extracting, as a bottom composition of the first distillation column, a composition that is more enriched in either HCC-140 or hydrogen fluoride, in terms of the concentration, than the composition supplied in (a);
- and optionally
- (c) supplying the first distillate to a second distillation column having operation conditions different from the operation conditions of the first distillation column, followed by distillation.
A method of separating a mixture comprising HCO-1130(E) and hydrogen fluoride, comprising the steps of:
- (d) supplying a composition comprising HCO-1130(E) and hydrogen fluoride to a first distillation column;
- (e) extracting, as a first distillate, an azeotropic composition comprising HCO-1130(E) and hydrogen fluoride, and extracting, as a bottom composition of the first distillation column, a composition that is more enriched in either HCO-1130(E) or hydrogen fluoride, in terms of the concentration, than the composition supplied in (d);
- and optionally
- (f) supplying the first distillate to a second distillation column having operation conditions different from the operation conditions of the first distillation column, followed by distillation.
A method of separating a mixture comprising HCO-1130(Z) and hydrogen fluoride, comprising the steps of:
- (g) supplying a composition comprising HCO-1130(Z) and hydrogen fluoride to a first distillation column;
- (h) extracting, as a first distillate, an azeotropic composition comprising HCO-1130(Z) and hydrogen fluoride, and extracting, as a bottom composition of the first distillation column, a composition that is more enriched in either HCO-1130(Z) or hydrogen fluoride, in terms of the concentration, than the composition supplied in (g);
- and optionally
- (i) supplying the first distillate to a second distillation column having operation conditions different from the operation conditions of the first distillation column, followed by distillation.
Dependencies are inferred from the claim text.