초록 ▼

A method for the recovery of a methane-rich natural gas from a natural gas containing, apart from methane, also hydrogen sulfide, carbondioxide, higher hydrocarbons and, in most cases, organosulfur compounds. According to the invention a hydrocarbon fraction of C4 hydrocarbons and higher is naturall

A method for the recovery of a methane-rich natural gas from a natural gas containing, apart from methane, also hydrogen sulfide, carbondioxide, higher hydrocarbons and, in most cases, organosulfur compounds. According to the invention a hydrocarbon fraction of C4 hydrocarbons and higher is naturally removed from the natural gas which is then subjected to a selective scrubbing for the removal of hydrogen sulfide with a regeneratable extraction, of scrubbing liquid. Next a C3 fraction is removed, the remaining gas being scrubbed with a second regeneratable washing agent, for the removal of carbondioxide to leave the methane-rich gas.

대표청구항 ▼

A method of separating components from a raw natural gas containing methane, hydrogen sulfide, higher hydrocarbons and possibly organosulfur compounds and carbonyl sulfide, which comprises the steps of: (a) removing a higher hydrocarbon fraction from said raw gas which includes hydrocarbons with a c

A method of separating components from a raw natural gas containing methane, hydrogen sulfide, higher hydrocarbons and possibly organosulfur compounds and carbonyl sulfide, which comprises the steps of: (a) removing a higher hydrocarbon fraction from said raw gas which includes hydrocarbons with a carbon number of 4 and greater; (b) selectively scrubbing hydrogen sulfide with a first regeneratable scrubbing liquid from the raw gas subsequent to its treatment in step (a); (c) thereafter removing a C3-hydrocarbon fraction from the raw gas from which hydrogen sulfide has been scrubbed in step (b); and (d) selectively scrubbing the gas from which the C3-hydrocarbon fraction has been removed in step (c) with a separate second regeneratable scrubbing liquid to remove CO2, thereby yielding a gas consisting predominantly of methane.