METHOD OF DETERMINING STABILITY OF ALKYL AROMATIC HYDROCARBON DEHYDROGENATION CATALYST Russian patent published in 2014 - IPC B01J23/04 B01J23/78 C07C5/333 

FIELD: chemistry.

SUBSTANCE: disclosed is a method of determining resistance of an alkyl aromatic hydrocarbon dehydrogenation catalyst to catalyst poisons, said catalyst containing an alkali metal, the method involving treating the catalyst with a mixture which contains an alkyl aromatic hydrocarbon and 1-10% aqueous hydrochloric acid solution in ratio of 1:2…1:3, at temperature of 550-650°C, holding the sample for 3 hours; in order to dehydrogenate the alkyl aromatic hydrocarbons, the dealkylisation degree is determined using the formula: $$\alpha =\frac{n{(M{e}^{+})}_{in}-n{(M{e}^{+})}_{rec}}{n{(M{e}^{+})}_{in}},$$ where α is the dealkylisation degree; n(Me⁺) is the amount of the alkaline promoter, mol. The method enables to predict loss of an alkaline promoter when using the catalyst at a formulation adjustment step without conducting long-term tests.

EFFECT: method for rapid determination of resistance of an alkyl aromatic hydrocarbon dehydrogenation catalyst, which contains an alkali metal, to catalytic poisons.

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