| abstract |
The invention belongs to the technical field of catalysts, and relates to a phenolic ortho-targeted methylation catalyst and a preparation method and application thereof. The method comprises: 1) preparing an iron-based precursor A; preparing a chromium-cobalt crystal precursor B; 3) The catalyst precursor is obtained through the iron-based precursor A, the chromium-cobalt crystal precursor B and the TiO 2 carrier; 4) The catalyst precursor is modified with potassium solution; the catalyst is obtained; 5) The catalyst is sieved once , tableting and multi-stage sieving to obtain phenolic ortho-targeted methylation catalysts. The catalyst provided by the invention has the characteristics of high catalytic activity, outstanding thermal stability, high mechanical strength and sintering resistance, and also has the advantages of cheap and easily available raw materials, green environmental protection, long service life, etc. At the same time, the catalyst is used for medium and low temperature coal tar When used as a phenolic compound catalyst, the selectivity for ortho-targeted methylation is good, the catalyst sites are many, and the conversion rate is high. |