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以自制的正构长链烷基酚为原料与多聚甲醛在碱性催化剂下进行羟甲基化反应,生成2,6-二羟甲基-4-烷基苯酚,再与另两分子烷基酚在固体超强酸催化下进行缩合反应生成2,6-二(5-烷基水杨基)-4-烷基苯酚,用核磁共振氢谱和碳谱、红外光谱和元素分析对产物进行了结构鉴定,探讨了催化剂、反应物料配比、反应时间等条件对产物产率的影响.另外根据上述反应路线,以工业品壬基酚和多聚甲醛为原料,经羟甲基化反应、缩合反应合成了2,6-二(5-壬基水杨基)-4-壬基苯酚.上述两种结果表明,选用SO24-/SnO2固体超强酸作催化剂,2,6-二羟甲基-4-烷基苯酚和烷基酚的配比为1:2,140℃反应2h,产率达到95%.
Using a home-made long-chain alkyl phenol as a raw material and paraformaldehyde in a basic catalyst for methylation, 2,6-dihydroxymethyl-4-alkylphenol is produced, which is then reacted with another two molecules of alkane Phenol was condensed in the presence of solid superacid to produce 2,6-bis (5-alkyl salicyl) -4-alkylphenol. The product was subjected to 1H NMR and GC, IR and elemental analysis The structure of the catalyst was identified, the reaction material ratio, the reaction time and other conditions on the yield of the product.In addition, according to the above reaction route, industrial nonylphenol and paraformaldehyde as raw materials, the hydroxymethyl reaction, (5-nonyl salicyl) -4-nonylphenol was synthesized through condensation reaction.The above two results show that using SO24- / SnO2 solid superacid as catalyst, 2,6-dimethylol -4-alkylphenol and alkylphenol ratio of 1: 2, 140 ℃ reaction 2h, the yield reached 95%.