固体超强酸催化长链烷基酚的合成研究

制备了ZrO2/SO24-型固体超强酸催化剂,在该固体超强酸的催化作用下,由长链醇和苯酚通过烷基化反应合成了系列长链烷基酚。探讨了催化剂焙烧温度、催化剂用量、反应时间、反应温度和反应醇酚比对烷基化反应的影响。结果表明,ZrO2/SO24-型固体超强酸对长链醇与苯酚的烷基化反应具有良好的催化效果。当催化剂焙烧温度为550℃时催化活性最佳,酚醇比1.0～1.2,催化剂最佳用量0.8～1.2g,反应时间3～4h,收率最高可达79%,同时反应最佳酚醇比、反应温度、反应时间和催化剂用量均随烷基链的增长略有增加。

SYNTHESIS OF LONG CHAIN ALKYLPHENOL CATALYZED BY SOLID SUPERACID

Long chain alkylphenols were synthesized from phenol and long chain alcohols in the presence of ZrO2/SO2-4 solid superacid.Factors influencing the alkylphenols yield such us calcination temperature of catalyst,catalytic dosage,reaction time,reaction temperature and molar ratios of reagents were discussed.The results showed that the solid superacid has outstanding catalytic activity on the alkylation of long chain alcohol and phenol.Especially,the catalyst possesses optimum catalytic action on the alkylations when calcination temperature is 550 ℃.When the molar ratio of reagents 1.0-1.2,reaction time 3-4 h,catalytic dosage 0.8-1.2 g,the yield could reach up to 79%.The optimum molar ratios of phenol to alcohol,reaction temperature,reaction time,catalyst dosage should be increased slightly as the alkyl chain carbon number increases.