FIELD: gas industry.
SUBSTANCE: invention relates to production of liquefied hydrocarbon gases, including adsorption purification of a broad fraction of light hydrocarbons from sulphur compounds and methanol. Method is characterized by that adsorption purification of liquefied hydrocarbon is implemented in multilayer adsorbers, in which each layer of adsorbent is series-selective in relation to a specific type of extracted impurities, temperature regeneration and subsequent cooling of adsorbents is carried out with a methane fraction, purified from impurities, similar to extracted impurities, and supplied on side, at final stage of cooling of adsorbents, adsorbers are blown with dry high-pressure nitrogen prior to feeding broad fraction of light hydrocarbons into adsorber with regenerated adsorbents, and purified broad fraction of light hydrocarbons undergoes distillation to produce liquefied narrow fractions of light hydrocarbons in system, at least two full rectification columns.
EFFECT: use of present method simplifies and provides universalisation of process diagram of production of liquefied hydrocarbon gases at stage of purification of liquefied gases independently from combination of extracted impurities, reduced power consumption of process and flexible variability of process with formation of a range of final product depending on marketing requirements.
14 cl, 1 tbl, 3 dwg
