METHOD OF OBTAINING LINEAR ALPHA-OLEFINS Russian patent published in 2013 - IPC C07C2/30 C07C2/08 C08F4/642 

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining linear alpha-olefins (LAO) by oligomerisation in presence of solvent and homogenous catalyst. Method includes (i) supply of ethylene, solvent and catalyst into oligemorisation reactor, (ii) oligomerisation of ethylene in reactor, (iii) removal of reactor outlet flow, which contains solvent, linear alpha-olefins, not necessary unreacted ethylene and catalyst, from reactor through system of discharge pipes of reactor, (iv) addition of at least one additive from polyamines, amines or alkanolamines, (v) supply of additive-containing outlet flow of reactor into zone of deactivation and removal of catalyst, (vi) deactivation of catalyst by alkaline and removal of deactivated catalyst from reactor product flow. Time during which additive remains in output flow of reactor before mixing with alkaline constitutes at least 10 seconds and does not exceed 100 seconds.

EFFECT: improved purity of product, suppression of undesired side reactions, reduction of energy costs for mixing, absence of necessary to apply complicated mixing devices, possibility of cleaning pipelines and equipment in working mode.

14 cl, 4 ex