Abstract

Domestic production of L-lactic acid is used as raw materials for the preparation of a new anionic emulsifier stearyl (L-) calcium lactate, in an index of the acid value and esters value of emulsifiers. It was studied that the effects of temperature, molar ratio, time and catalyst of four factors on the preparation process stearyl (L-) calcium lactate, with the orthogonal experiment method to determine the optimum conditions. Stearyl (L-) calcium lactate structures were identified by IR. Results of the study show the optimal conditions of stearyl (L-) calcium lactate synthesis: temperature 110°C, the molar ratio of L-lactic acid and stearic acid is 1.8:1, the amount of catalyst is added to account for 1.0%, the reaction time was 2 h. Using the above determined conditions to do validation experiments, the results show that stearoyl (L-) calcium lactate esters and acid values are in line with standards, which is an emulsifier with good performance.

Keywords:

Emulsifier, L-lactic acid, preparation, stearyl (L-) calcium lactate,

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Competing interests

The authors have no competing interests.

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