Synthesis and properties of α-sulfo carboxyl disodium salt

ABSTRACT

The synthesis and properties of α-sulfo carboxyl disodium salt (SCDS) were studied in detail for the first time in this paper. SCDS was synthesized via saponification reaction of fatty acid methyl ester sulfonate sodium (MES). FT-IR was used to characterize the molecular structure of target product. The yield of disodium salt was greater than 98% by two-phase titration. The performance of SCDS was studied and was compared with raw materials MES, conventional anionic surfactant AES and nonionic surfactant AEO₉. The result shows SCDS can reduce the surface tension of the solution to 27.89 mN/m at critical micelle concentration (CMC). The wetting ability of SCDS was significantly enhanced with the increase of temperature. The emulsification effect of SCDS on the soybean oil is better than that on the liquid paraffin. Surprisingly, SCDS has a good foamability and foaming stability.

GRAPHICAL ABSTRACT

KEYWORDS:

• Disodium salt
• foam properties
• surface tension
• synthesis
• wetting ability

Additional information

Funding

The project is a key R & D program in Shanxi Province (201603D421036) and is supported by international cooperation. In addition, we would like to thank the financial support of JALA funding (JALA2015).

Notes on contributors

Yongqiang Sun

Yongqiang Sun is a professor at the China Research Institute of Daily Chemical Industry whose research interests are focused on engineering developments related to the manufacturing of nonionic surfactants.

Lirong Ding

Lirong Ding is a postgraduate student at the China Research Institute of Daily Chemical Industry, Taiyuan, Shanxi Province, P.R. China. Her main research field is the structure - property relationship in molecules with two active groups.

Jingjie Zhou

Jingjie Zhou is an engineer at the China Research Institute of Daily Chemical Industry and she gotten her Master’s degree in the Tianjin University.

Martino Di Serio

Martino Di Serio is a professor of Chemical Sciences University of Naples Federico Ⅱ. His research interests are focused on the ethoxylation of fatty acid esters.

Kehua Zhu

Kehua zhu is a postgraduate at the China Daily Chemical Industry Research Institute. His main research field is the synthesis and properties of castor oil acid methyl ester ethoxylate.

Yong Zhang

Yong Zhang is an engineer at the China Research Institute of Daily Chemical Industry. His research interests are focused on the synthesis and investigation of nonionic surfactants.

Huibin Liang

Huibin Liang is an engineer at the China Research Institute of Daily Chemical Industry. His research interests are focused on the esterification of fatty acid.

Huaping Wu

Huaping Wu is an engineer at the China Research Institute of Daily Chemical Industry. Her main research field is the analysises and determinations of surfactants.

Jinyuan Sun

Jinyuan Sun is an engineer at the China Research Institute of Daily Chemical Industry. His research interests are focused on the properties of series of surfactants.