Improved catalyst alkylation, alkylation catalysts and alkylation catalysts

摘要

An improved alkylation catalyst, an alkylation process and a process for preparing an alkylation catalyst are described. The alkylation process involves the reaction through a solid acid, zeolitic catalyst and can be carried out for a relatively long time under steady state conditions. The alkylation catalyst comprises a crystalline zeolite structure, a Si / Al molar ratio of 20 or less, an alkali metal of less than 0.5 wt%, and is also characterized by catalyst lifetime characteristics. Some catalysts may contain rare earth elements in the range of 10 to 35 wt%. One method of preparing the catalyst involves the deammoniation treatment after stabilization of the resulting structure including the firing step followed by the exchange of the rare earth element (s) performed at a temperature of at least 575 ° C. The improved deammonitization process uses low temperature oxidation.