METHOD OF SYNTHESIS OF ISOBUTYLBENZENE AND 4-METHYLPENTENE-1 Russian patent published in 1994 - IPC

FIELD: chemical technology, organic chemistry. SUBSTANCE: products - isobutylbenzene, empirical formula is C₁₀H₁₄, 4-methylpentene-1, empirical formula is C₆H₁₂. Reagent 1: toluene. Reagent 2: propylene. Catalyst: sodium on potash. Conditions: at 140-170 C, 9-10 MPa. Process involves toluene drying, and after drying toluene is divided for two flows: 50-70% dried toluene is fed for interaction with propylene. The remainder part of toluene is passed over catalyst (at 50-100 C and at volume rate of feeding 0.5-1 0,5-1 h^-1) after carrying out of the stage of interaction following by its distillation and recycle on the stage of toluene drying. Catalyst after toluene passing is regenerated with hydrogen. Method is used for medicinal preparations synthesis. EFFECT: improved method of synthesis. 1 dwg, 1 tbl