Rentech Receives $136.8 Million in Connection with Closing of Rentech Nitrogen Initial Public Offering

Rentech, Inc. (NYSE AMEX:RTK) announced today that it has received $136.8 million in connection with the closing of the initial public offering of 15,000,000 common units representing limited partner interests in Rentech Nitrogen Partners, L.P. (NYSE:RNF).

Rentech now indirectly owns approximately 60.8% of the outstanding common units of Rentech Nitrogen and 100% of the non-economic general partner interest in Rentech Nitrogen.

Rentech would receive up to an additional $41.9 million if the underwriters of the initial public offering exercise the option to purchase up to 2,250,000 additional common units of Rentech Nitrogen at the public offering price within 30 days after November 3, 2011.

A registration statement relating to the common units has been filed with, and declared effective by, the Securities and Exchange Commission. This press release shall not constitute an offer to sell or the solicitation of an offer to buy the common units, nor shall there be any sale of the common units in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state.

About Rentech, Inc.

Rentech, Inc., incorporated in 1981, provides clean energy solutions. The Company's Rentech-SilvaGas and Rentech-ClearFuels biomass gasification processes can convert multiple cellulosic biomass feedstocks into synthesis gas (syngas) for production of renewable fuels and power. Combining the gasification processes with Rentech's unique application of syngas conditioning and clean-up technology and the patented Rentech Process based on Fischer-Tropsch chemistry, Rentech offers an integrated solution for production of synthetic fuels from cellulosic biomass. The Rentech Process can also convert syngas from fossil resources into ultra-clean synthetic jet and diesel fuels, specialty waxes, and chemicals. Final product upgrading and acid gas removal technologies are provided under an alliance with UOP, a Honeywell company. Rentech develops projects and offers licenses for these technologies for application in synthetic fuels and power facilities worldwide. Rentech, Inc. owns a majority interest and serves as general partner of Rentech Nitrogen Partners, L.P., a nitrogen fertilizer limited partnership. Rentech Nitrogen Partners, L.P. manufactures and sells nitrogen fertilizer products including ammonia, urea ammonia nitrate, urea granule and urea solution in the Mid Corn Belt region of the United States.