首页>
外国专利>
process for the production of 2.6 - ditert, butylphenol or a butylphenolmischung containing 2 - ments. butylphenol and 2.6 - ditert. butylphenol or 4 - ments. butylphenol
process for the production of 2.6 - ditert, butylphenol or a butylphenolmischung containing 2 - ments. butylphenol and 2.6 - ditert. butylphenol or 4 - ments. butylphenol
The reaction of phenol with a mixture of isomeric butenes to give 2,6-di-tert.-butylphenol (which may be mixed with 2-tert.-butylphenol), is effected at elevated temperature in presence of an Al phenoxide. The product may be reacted with phenol in presence of a p-alkylation catalyst to give 4-tert.-butylphenol which is free of sec.-butylphenols; the catalyst is, e.g., H3PO4, H2SO4, oleum, BF3, HCIO4, an ion-exchange resin, an arylsulphonic acid or an acid-activated earth.
展开▼
机译：苯酚与异构丁烯的混合物反应生成2，6-二叔丁基苯酚（可以与2-叔丁基苯酚混合）是在苯酚Al的存在下于高温下进行的。该产物可以在对烷基化催化剂的存在下与苯酚反应，得到不含叔丁基苯酚的4-叔丁基苯酚。催化剂是例如H 3 PO 4，H 2 SO 4，发烟硫酸，BF 3，HCIO 4，离子交换树脂，芳基磺酸或酸活化的土。
展开▼
