METHOD OF PROLONGING TIME FOR STABLE OPERATION OF CATALYST DURING HYDROALKYLATION OF BENZENE WITH ACETONE TO OBTAIN CUMENE AND METHOD OF PRODUCING CUMENE VIA HYDROALKYLATION OF BENZENE WITH ACETONE Russian patent published in 2013 - IPC B01J37/02 B01J35/00 B01J29/03 B01J23/72 C07C15/85 C07C2/66 

FIELD: chemistry.

SUBSTANCE: invention relates to catalytic processes for producing cumene. Described is a method of prolonging stable operation of a catalyst, which contains a hydrogenating component and an alkylating component, in a reaction for producing cumene by hydroalkylation of benzene with acetone, involving layer by layer arrangement of the hydrogenating and alkylating components in the catalyst, wherein the hydrogenating component is placed first on the path for feeding material, the hydrogenating component being copper chromite and/or copper oxide, which is promoted by metals selected from: manganese, gallium, chromium, rare-earth metals, with weight ratio of copper to promoter metals equal to (4.0-6.0):1; the alkylating component is placed second on the path for feeding material, the alkylating agent being micro-mesoporous dealuminated MOR or BEA or FAU, wherein the amount of the hydrogenating component in the catalyst is equal to 15-35 wt % of the total amount of the catalyst. Described is a method of producing cumene by hydroalkylation of benzene with acetone, which is characterised by that hydroalkylation is carried out in a flow reactor with a fixed catalyst bed at 150-250°C, mass flow rate of feeding material of 0.3-7 h^-1, molar ratio of benzene to acetone of 4:1-9:1, molar ratio of hydrogen to acetone of 1:1-10:1, and pressure of 0.1-3 MPa, using the catalyst described above.

EFFECT: longer time for stable operation of the catalyst.

5 cl, 1 tbl, 19 ex