PROCESS OF PRODUCING STYRENE VIA LIQUID-PHASE DEHYDRATION OF METHYL PHENYL CARBINOL-CONTAINING FEEDSTOCK (OPTIONS) Russian patent published in 2007 - IPC C07C1/24 C07C15/46 B01D3/32 

FIELD: industrial organic synthesis.

SUBSTANCE: embodiments of invention are accomplished via liquid-phase dehydration of methyl phenyl carbinol-containing feedstock in presence of acid-type catalyst in column-type reactor-rectifier comprising still portion, built-in heat-exchanger, and rectification portion, volume of still portion constituting 80% of built-in heat-exchanger volume. Temperature of till portion of reactor-rectifier is 140-205°C and temperature in rectification portion 130-180°C. Advantageously, methyl phenyl carbinol-containing feedstock is supplied to and/or under built-in heat-exchanger and catalyst or mixture of catalyst with feedstock and/or still product is supplied to still portion at mixing. Linear velocity of reaction mass vapors within free cross-section of reactor is 0.05 to 0.9 m/s, residence time of styrene in reaction zone 0.05 to 50 sec, and residence time of still product in reactor 5 to 500 h.

EFFECT: increased conversion of feedstock and final product formation selectivity.

5 cl, 14 ex