Chemical Fertilizer Mfg. plant using Natural Gas

http://www.lcec.com/commerce/misc/equip_search.cz

Maybe do some research into some large companies like wilbur ellis or chevron, and find out a little about their systems and who manufactures/designs them. Maybe contact them directly. You may find that they would set up a manufacturing plant cheaper, and you could deal with fertilizer mixes and distribution, with them handling mass production. Obviously, you do not make fertilizers from methane, but rather from nitrogen gas, and various rocks. The natural gas is the energy source. Anything except ammonia/urea/nitric acid, is going to need a mined source of mineral rocks available. Phosphate fertilizers are derived from conc Sulfuric Acid dissolution of Phosphate rocks. You also need a source of lime, as lime (or lime based derivatives) is used in huge quantities in most fertilizer mixes (except straight nitrogen mixes like AN or urea).