| 摘要 |
<p>The invention relates to a process for preparing sterically hindered phenol derivatives, used as antioxygen additives for motor vehicle fuel. According to the invention, the process is characterized in that 100 parts of cresol residue from the petro-chemical platforms are diluted with 300...500 parts of isobutyl alcohol and there are added 100...125 parts of discolouring earth, the mixture is kept while stirring at the room temperature for 5 h and then 24 h at rest, afterwards it is filtered, there being obtained a mixture of phenol, o, m, p-cresol, di-alkyl phenols and tri-alkyl phenols in isobutyl alcohol which is alkylated by heating at 120...127A C in the presence of a highly acid ion exchange resin of the cationite type as catalyst at a ratio of 6.7...7.9 : 1.</p> |
