Natural gas processing involves several steps to purify raw natural gas extracted from the ground. The key steps include removing water, sulfur compounds, and other impurities. Natural gas liquids are also separated out. The purified natural gas is then compressed and odorized with mercaptan before being transported through pipelines for distribution and use. The main processing methods are oil and water removal, gas sweetening to remove sulfur and carbon dioxide, dehydration to remove water, and compression for transportation.