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Semiclathrate hydrate dissociation conditions measured for the systems including CO₂, N₂, CH₄, or H₂ + tetra-n-butylammonium bromide (TBAB) aqueous solution with a wide range of concentrations (0.050, 0.100, 0.150, 0.153, 0.167, 0.250, 0.350, and 0.500 mass fraction) are reported. These data were measured in a (277.7 to 294.7) K temperature range and pressures up to 15.49 MPa pursuing an isochoric pressure search method. Some comparisons are made between our data and the experimental phase equilibrium data reported in open literature. The comparisons show that some literature data seem to be not reliable.