NATURAL GAS CONVERSION METHOD Russian patent published in 2015 - IPC B01D53/00 

FIELD: oil and gas industry.

SUBSTANCE: invention is referred to conversion of natural gas and may be used at plants of gas-processing industry. The natural gas conversion method includes extraction of water, carbon dioxide, hydrogen sulphide, hydrocarbons C₂ and higher, inert gases from gas, natural gases differing essentially in content of admixtures are converted separately, at that natural gas with low calorific value is converted in series at the first plant of deep amine treatment from hydrogen sulphide and selective treatment from carbon dioxide, at the second plant of deep amine treatment from carbon dioxide, at drying plant and plant for treatment of gas with low calorific value from mercaptans and at low-temperature fractionation plant for treated and dried low-calorific gas with production of methane, ethane and hydrocarbons C₃ and higher as marketable products while high-calorific natural gas is processed in sequence at deep amine treatment plant from carbon dioxide and hydrogen sulphide, at drying plant and plant for treatment of gas with high calorific value from mercaptans and at low-temperature fractionation plant for treated and dried low-calorific gas with production of methane, ethane and hydrocarbons C₃ and higher as marketable products.

EFFECT: improvement of the method efficiency.

15 cl, 2 dwg, 2 tbl