HYDROCARBON GAS CLEANING Russian patent published in 2013 - IPC B01D53/02 B01D53/46 

FIELD: process engineering.

SUBSTANCE: invention relates to hydrocarbon gas cleaning. Proposed method comprises removal of mercaptans by their oxidation to sulfur and disulfides in the presence of catalyst at increased temperature and condensation of liquid products of oxidation. Note here that gas is mixed with oxidation products to separate liquid oxidation products and separation gas therefrom. Separation gas is subjected to adsorption cleaning at adsorbent cooling to adsorption temperature but not lower than that of water freezing or hydration. Adsorbent regeneration is performed by blowing with cleaned gas at lower pressure and heating of adsorbent by heat carrier to regeneration temperature while regenerated adsorbent is cooled by coolant to adsorption temperature. Note also that regeneration gas is mixed with air at weight ratio of mercaptans to air oxygen of 2.2-3.1 to force obtained mix through oxidation catalyst at weight hour space velocity and oxidation temperature while oxidation products are forced into flow of gas being cleaned by pump by compressing it to hydrocarbon gas pressure using liquid products of oxidation as the working fluid.

EFFECT: efficient cleaning, low input of materials and power.

2 cl, 1 dwg, 1 ex