METHOD OF PRODUCING CATALYST (VERSIONS) AND METHOD OF ALKYLATION OF ISOBUTANE BY BUTYLENE IN PRESENCE OF CATALYST PRODUCED (VERSIONS) Russian patent published in 2018 - IPC B01J37/30 B01J29/08 B01J29/12 C07C2/58 

FIELD: chemistry.

SUBSTANCE: to prepare an alkylation catalyst for isobutane with olefins based on NaNH₄Y-type zeolite, with a residual sodium oxide content of not more than 0.8 wt %, a zeolite suspension in water is first obtained. The resulting zeolite is subjected to the ion exchange at an atmospheric pressure and a temperature of 70-85°C for 3-9 h to cations of lanthanum from the aqueous solution of lanthanum nitrate, taken in an amount providing a content of lanthanum oxide in the final catalyst of 0.15÷3.0 wt %. In the first version the suspension of zeolite is filtered, rinsed with fresh water, dried at 110÷130°C for 2-4 hours, compressed into tablets and they are calcined at 350°C for 1÷2 h and at 550°C for 2-4 h . In the second version, the suspension of zeolite is mixed with another slurry obtained by the peptisation of aluminium hydroxide powder of boehmitic structure by the solution of nitric acid to pH=1, is evaporated, moulded into pellets and they are dry-cured at room temperature. Then it is dried and calcined, as described above. After calcination palladium chloride can be applied to the catalyst, previously dissolved by heating in 25% ammonia solution, providing the content of palladium oxide in the finished catalyst of 0.1÷0.5 wt %. The catalyst is withered at room temperature, dried at 120°C and calcined at 500°C for 3 hours. The resulting catalysts are used in the process for alkylating isobutane with olefins at elevated temperature and pressure. In a particular case, the alkylation of isobutane with olefins is carried out at a temperature of 60÷100°C, a pressure of 0.85÷1.7 MPa, with respect to isobutane: olefin in the feedstock 8÷10:1, the volumetric feed rate of the feedstock on olefins 0.15÷0.2 h^-1 and a duration of feed of 24÷36 h.

EFFECT: increasing the period of stable operation of the catalyst and stability of the alkylation process, while increasing the conversion of butylenes and the yield of trimethylpentanes in iso-C₈ hydrocarbons when implementing the method on the existing equipment in the domestic industry.

8 cl, 1 tbl, 6 ex