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    • 3. 发明授权
    • Method of manufacturing salt of .alpha.-sulfofatty acid ester
    • 制备{60-磺基酸酯的盐的方法
    • US3969375A
    • 1976-07-13
    • US524709
    • 1974-11-18
    • Osamu OkumuraTakenobu SakataniKazuo OhbuMasuzo Nagayama
    • Osamu OkumuraTakenobu SakataniKazuo OhbuMasuzo Nagayama
    • C07C67/00C07C301/00C07C303/06C07C303/32C07C309/17C11D1/28C07C143/12
    • C07C303/06
    • A neutralized product containing salt of .alpha.-sulfofatty acid ester in high concentration can be produced by the method comprising the steps of (1) sulfonating fatty acid ester by contacting a gaseous mixture of sulfur trioxide (SO.sub.3) and an inert gas containing 1 - 15% by volume of SO.sub.3 with a film of a fatty acid ester, said ester having the formula RCH.sub.2 COOR' (wherein R is alkyl having 8 - 18 carbon atoms and R' is alkyl having 1 - 5 carbon atoms), under the conditions that the molar ratio of SO.sub.3 to said fatty acid ester is in the range of 1.0 - 1.5, the temperature is in the range of 50.degree. - 85.degree.C and the time of contact is in the range of 0.5 - 30 seconds; (2) contacting a film of the reaction product obtained by step (1) into contact with said gaseous mixture, under the conditions of a temperature in the range of 95 - 150.degree.C and a time of contact in the range of 3 - 120 seconds; and (3) instantly neutralizing the reaction product obtained by step (2) with a base selected from the group consisting of an aqueous solution of alkali metal hydroxide, ammonia water and ethanol amine while retaining the condition that the pH value is in the range of 6 - 10 and the temperature is less than 70.degree.C. This neutralized product is usable as the active ingredient a detergent without subjecting it to any further treatment.
    • 含有高浓度的α-磺基脂肪酸酯的中和产物可以通过以下方法制备:(1)通过使三氧化硫(SO 3)和含有1-15的惰性气体的气体混合物 脂肪酸酯膜的SO 3体积%,所述具有式RCH 2 COOR'的酯(其中R是具有8-18个碳原子的烷基,R'是具有1-5个碳原子的烷基),在 SO 3与所述脂肪酸酯的摩尔比在1.0-1.5的范围内,温度在50-85℃的范围内,接触时间在0.5-30秒的范围内; (2)使步骤(1)获得的反应产物的膜与所述气体混合物接触,在95-150℃的温度和3〜120℃范围内的接触时间 秒; 和(3)用碱金属氢氧化物水溶液,氨水和乙醇胺立即中和由步骤(2)获得的反应产物与碱金属氢氧化物,氨水和乙醇胺的水溶液,同时保持pH值在 6-10,温度低于70℃。该中和产物可用作活性成分,不用进行任何进一步的处理。