METHOD OF REMOVING NITROGEN COMPOUNDS FROM LIQUID STREAMS AND DEVICE FOR REALISING SAID METHOD Russian patent published in 2011 - IPC C07C7/13 C07C2/66 C07C15/85 C07C15/73 B01J8/02 

FIELD: chemistry.

SUBSTANCE: invention relates to versions of a method for alkylation of an alkylation substrate, which is an aromatic compound, using an alkylation agent, one of which involves: directing a crude stream of alkylation substrate, which contains the alkylation substrate in form of an aromatic compound, to an impurity adsorption zone which contains a cleaning adsorbent which contains clay or resin, which is selective towards impurities which contain basic organic nitrogen compounds, to obtain a cleaned stream of the alkyaltion substrate which contains the alkylation substrate in form of an aromatic compound, and nitriles; directing at least a portion of the cleaned stream of alkylation substrate and at least a portion of the reaction output stream to a separation zone; extraction of a contaminated stream of substrate from the separation zone, which contains the alkyaltion substrate in form of an aromatic compound, and nitriles; directing at least a portion of the contaminated stream of alkylation substrate which contains the alkylation substrate in form of an aromatic compound, at least 20 pts. wt per million of water and nitriles into a nitrogen adsorption zone, which functions at temperature 120-300°C and contains an adsorbent which contains acidic molecular sieves which are selective towards nitriles, and extraction of a denitrated substrate stream from the nitrogen adsorption zone, containing the alkylation substrate which is in form of an aromatic compound and has concentration of nitriles which is less than concentration of nitriles in the contaminated sustrate stream;and directing the alkylating agent and at least a portion of the denitrated substrate stream, which contains the alkylation substrate which is in form of an aromatic compound, into the alkylation reaction zone separate from the nitrogen adsorption zone, alkylation of the alkylation substrate, which is in form of an aromatic compound, with an alkylation agent over an alkylation catalyst to form an alkylation product and extraction of a reaction output stream containing an alkylation product from the alkylation reaction zone.

EFFECT: present invention enables creation of a protective layer which will adsorb nitriles from a stream of hydrocarbon material in the presence of water.

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