Extraction and Determination of Residual Ester in Ester Hardened Sodium Silicate Sand

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Tang, Lingbo^1

School of Mechanical Engineering and Automation, Wuhan Textile University, Wuhan

430073, China^1

关键词: Acid-base titration;    Ester hardened sodium silicate sand;    Extraction conditions;    Extraction process;    Extraction solvents;    Extraction technology;    Extraction temperatures;    Single-factor experiments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/2/022064/pdf
DOI  :  10.1088/1757-899X/394/2/022064

来源: IOP

【 摘 要 】

The residual ester in sodium silicate sand and recycled sand has an important influence on the performance of recycled sand. In this paper, a new method to extract and detect residual esters in water sodium silicate sand and regenerated sand is established. The residual ester of ester hardened water sodium silicate sand was extracted by the extractor using petroleum ether, ethanol, acetone and other solvents. After hydrolysis of residual ester in extracts, the content of acid was determined by means of neutralization titration. The content of the residual ester was determined by using acid base titration test. The experimental results are obtained through the study of extraction solvent, extraction temperature, extraction time and liquid solid ratio. Based on the single factor experiment, the optimum extraction process was determined by using the four-factor three-level orthogonal test to optimize the extraction conditions. The best extraction technology: extraction solvent for petroleum ether, extraction temperature is 80 °C, extracting time 1.5 h. This study lays the foundation for evaluating the performance of sodium silicate regeneration sand.