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    Article

    On the Relationship Between the Roots of Cubic Equations of State and New Perspectives of the Vapor–Liquid Equilibrium Calculation

    Based on the root–coefficient relations for a cubic function, quadratic functions are constructed that strictly relate the saturated volumes of liquid and vapor phases and the third solution from a cubic equat...

    Hongqin Liu in International Journal of Thermophysics (2023)

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    Article

    Synthesis, Characterization and Properties of N-Alkyl-N,N-di(2-hydroxyethyl) Amine Oxides

    N-Dodecyl-N,N-di(2-hydroxyethyl) amine oxide (C12DHEAO) and N-stearyl-N,N-di(2-hydroxyethyl) amine oxide (C18DHEAO) were synthesized with N-alkyl-diethanolamine and hydrogen peroxide. The...

    Hongqin Liu, Guoying Shi, Baocai Xu, Shuyu Chen in Journal of Surfactants and Detergents (2017)

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    Article

    Synthesis, Surface Activities and Toluene Solubilization by Amine-oxide Gemini Surfactants

    A series of amine-oxide gemini surfactants featuring amide groups [N, N’-dimethyl-N, N’-bis(2-alkylamideethyl)-ethylenediamine oxide (alkyl = C11H23, C13H27, C15H31, C17H35)] have been synthesized via a three-ste...

    Hongqin Liu, Jun Hu, Baocai Xu, Tingting Zhao in Journal of Surfactants and Detergents (2016)

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    Article

    Synthesis, Corrosion Inhibition Performance and Biodegradability of Novel Alkyl Hydroxyethyl Imidazoline Salts

    New alkyl hydroxyethyl imidazoline salts were synthesized via a high pressure process with imidazoline and dimethyl carbonate, and their chemical structure were confirmed using mass spectral fragmentation and ...

    Hongqin Liu, Jun Hu, **aoze Zhou, Dan Liu in Journal of Surfactants and Detergents (2015)

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    Article

    Synthesis, Characterization and Properties of New Lauryl Amidopropyl Trimethyl Ammoniums

    A new lauryl amidopropyl trimethyl ammonium methyl carbonate with the formula CH3(CH2)10CONH(CH2)3N+(CH3)3CH3CO3 was synthesized via a high pressure process with tertiary amines and dimethyl car...

    Hongqin Liu, Fei Li, Baocai Xu, Guiju Zhang in Journal of Surfactants and Detergents (2012)