Compound emulsifier for asphalt and preparation method thereof
A technology of compound emulsifier and emulsified modified asphalt, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc. It can solve the problems of difficulty in grasping the types of compounding, poor stability of asphalt emulsion, and failure to achieve a single effect Emulsifier and other issues, to achieve good storage stability, excellent emulsification performance, improve the effect of construction performance
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[0028] The preparation method of the 3-dodecyloxy-2-hydroxypropyltrimethylammonium fluoroborate specifically includes:
[0029] The first step is the preparation of 3-dodecyloxy-2-hydroxypropyltrimethylammonium bromide;
[0030] The second step is the preparation of 3-dodecyloxy-2-hydroxypropyltrimethylammonium fluoroborate.
[0031] The first step is further specifically adding tetradecyl alcohol, epichlorohydrin, 50% sodium hydroxide aqueous solution, tetrabutylammonium bromide and petroleum ether into the reaction vessel, heating to 50°C, stirring for 5 hours, and cooling At room temperature, filter with suction and wash twice with petroleum ether. Combine the filtrate and the washed petroleum ether. After washing with distilled water at 50℃, dry with anhydrous sodium sulfate for 1 hour to distill off petroleum ether and unreacted epoxy chloride. Propane to obtain dodecyloxy glycidyl ether; add the obtained dodecyloxy glycidyl ether, trimethylammonium bromide and ethanol into the...
Embodiment 1
[0064] Example 1 Preparation of 3-dodecyloxy-2-hydroxypropyltrimethylammonium fluoroborate
[0065] Add 20mol of tetradecanol, 40mol of epichlorohydrin, 40mol of 50% sodium hydroxide aqueous solution, 1mol of tetrabutylammonium bromide and 7.5L of petroleum ether into the reaction vessel, raise the temperature to 50℃, stir for 5 hours, and cool to At room temperature, filter with suction and wash twice with 1L petroleum ether. Combine the filtrate and the washed petroleum ether. After washing with 500ml of distilled water at 50℃, dry with 300g of anhydrous sodium sulfate for 1 hour to distill off petroleum ether and unreacted rings. Oxychloropropane to obtain lauryloxy glycidyl ether; add 15ml of lauryloxy glycidyl ether obtained, 15ml of trimethylammonium bromide and 750ml of ethanol into the reaction vessel, and react with stirring at 30°C for 4 hours , The ethanol and water are distilled out, further recrystallized with ethyl acetate, and dried in vacuum to obtain 3-dodecyloxy...
Embodiment 2
[0069] Example 2 Preparation of 3-(1-tetradecyl-3-imidazole) propanesulfonate
[0070] Add 20ml of 1,3-propane sultone to 2L of acetone to form an acetone solution, then add it to the reaction vessel, keep it at 0℃, slowly add 7mol 1-tetradecylimidazole to the reaction vessel and dissolve it in 800ml The solution prepared in acetone was added while stirring. After the addition was complete, the reaction mixture was heated to room temperature and stirred for 5 days. The white powder obtained was filtered, washed with 1L acetone for 3 times, filtered, and at 50°C. The zwitterionic surfactant was obtained by vacuum drying for 6 hours with a yield of 75%.
[0071] Product uses CDCl 3 As a solvent for nuclear magnetic analysis.
[0072] 1 H NMR(CDCl 3 , 400MHz): δ 0.94 (3H, t); 1.33 (22H, m); 1.99 (2H, m); 2.55 (2H, t); 3.04 (2H, t); 4.53 (2H, t); 4.87 ( 2H, t); 7.68 (1H, s); 8.03 (1H, s); 10.26 (1H, s).
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