Successful pilot test of a new toluene catalyst for Liaoyang Petrochemical

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This post was last edited by liuquan1100 on 2017-10-6 at 13:50. The pilot test of the toluene stereoselective disproportionation catalyst developed by Liaoyang Petrochemical Company was successful. The evaluation results show that the catalyst achieves a toluene conversion rate of over 30% and a xylene selectivity of over 90%, reaching the level of similar catalysts in China and filling the gap in China National Petroleum Corporation’s technology for selective toluene disproportionation. Toluene stereoselective disproportionation catalyst technology and transalkylation catalysis technology are combined process techniques for increasing the production of aromatics; the application of these two technologies will broaden the range of raw materials that can be utilized and enhance the flexibility and control available in plant operations. With the goal of establishing the largest aromatic hydrocarbons base in the country, Liaoyang Petrochemical began researching aromatic hydrocarbons catalysts as early as 2010. After successfully developing a new type of catalyst for the alkylation of benzene and heavy aromatic hydrocarbons in 2013, it proceeded to screen more than a dozen catalysts based on molecular sieve active components as well as several types of modifiers. Since the beginning of this year, Liaoyang Petrochemical has been developing toluene-selective disproportionation technology using the appropriately selected molecular sieve active components and modifiers after evaluation. By employing liquid-phase silicon deposition modification techniques, it precisely modifies the catalyst pores and controls the acidity of the catalyst surface, thereby maximizing the catalyst’s efficiency in converting toluene and its selectivity for xylene. Pilot tests were successful in mid-June. Currently, Liaoyang Petrochemical is conducting research on optimizing the process conditions for this catalyst, in order to provide baseline data for subsequent scale-up experiments and industrial-scale trials.