METHOD OF PRODUCING LINEAR ALPHA-OLEFINS Russian patent published in 2012 - IPC C07C2/22 C07C7/20 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing linear alpha-olefins (LAO) by oligomerisation of ethylene in the presence of a solvent and a homogeneous catalyst. The method involves the following steps: (i) feeding ethylene, solvent and catalyst into an oligomerisation reactor, (ii) oligomerisation of ethylene in the reactor, (ii) outputting a reaction product stream from the reactor through a system of drain pipes of the reactor, (iv) feeding the reaction product stream to a catalyst deactivation and removal step and (v) deactivating and removing the catalyst from the reactor product stream. At least one organic amine is fed into the system of drain pipes of the reactor. Further, the organic amine is extracted from the reaction product stream by distillation, extraction or adsorption, and the extracted organic amine is redirected into the system of drain pipes of the reactor. The amine used is soluble in an organic phase containing LAO and is insoluble or has low solubility in water or a mixture of water and alkali.

EFFECT: method enables to avoid formation of HCl during catalyst deactivation and obtain products with high purity and thermal stability.

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