NATURAL GAS DRYING AND TREATING PROCEDURE Russian patent published in 2010 - IPC B01D53/14 C07C7/12 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used for natural and associated petroleum gas conditioning for long-distance transport. The natural gas is supplied to an adsorber wherein a combined adsorbent layer and a downstream silica gel layer are charged. On the adsorber, chemisorption of sulphide traces, such as mercaptans COS and H₂S is enabled. On the silica gel layer, adsorption of water vapour and hydrocarbons C_6+- is observed. As an adsorbent, aluminium oxide containing 3÷25 wt % of metal oxides of the I-II group, namely: Na, K, Pb, Cs, Cu, Ag, Be, Mg, Ca, Sr, Ba, Zn, Cd and their mixtures is used. Regeneration of the sweet gas saturated silica gel layer and adsorbent is performed at temperature 220-280°C.

EFFECT: invention allows for more effective natural gas drying and treating process ensured by prevention of carbon deposits and sulphur on the surface of silica gel of a bottom layer and for longer service life of the silica gel layer.

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