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为了提高磺酸盐清净剂传统合成工艺的稳定性和减少二氧化碳的浪费,探索使用新工艺定量二氧化碳法合成烷基苯磺酸钙盐和烷基苯磺酸镁盐清净剂。结果表明:该工艺不适合用于合成烷基苯磺酸钙盐清净剂,但可用于合成烷基苯磺酸镁盐清净剂,在烷基苯磺酸用量3.5g、二甲苯用量50mL、活性-60氧化镁用量2.5g、甲醇用量3mL、氨水用量1.5mL、二氧化碳压力3MPa、过碱化时间1h的条件下,可以获得碱值为283mgKOH/g的中碱值烷基苯磺酸镁盐清净剂产品;保持其它反应条件不变,活性60氧化镁用量增加至3.5g时,可以获得碱值为339mgKOH/g的高碱值烷基苯磺酸镁产品。红外光谱分析结果表明,磺酸镁清净剂产品含有无定形碳酸镁。
In order to improve the stability of the traditional synthetic process of sulfonate detergents and reduce the waste of carbon dioxide, the paper explores the synthesis of alkylbenzenesulfonate calcium salts and alkylbenzenesulfonate magnesium salt detergents by the new process of quantitative carbon dioxide method. The results show that the process is not suitable for the synthesis of calcium alkylbenzenesulfonate detergent, but can be used for the synthesis of magnesium alkylbenzenesulfonate detergent, in the amount of alkylbenzene sulfonate 3.5g, xylene amount 50mL, activity -60 magnesium oxide dosage 2.5g, the amount of methanol 3mL, ammonia dosage 1.5mL, carbon dioxide pressure 3MPa, overbasing time 1h conditions, you can get the base value of 283mgKOH / g of magnesium alkylbenzene sulfonate clean Agent product; to maintain the other reaction conditions unchanged, the amount of active 60 magnesium oxide increased to 3.5g, you can get a base value of 339mgKOH / g of magnesium alkylbenzene sulfonate product. Infrared spectroscopic analysis showed that the magnesium sulfonate detergent product contained amorphous magnesium carbonate.