Rentech Announces REN CORPORATION/ Sauer Danfoss, Eaton Purchase Orders

DENVER, and STILLWATER, Okla., March 11 -- Rentech, Inc. (AMEX:RTK) today announced that REN CORPORATION (REN), a Company in which Rentech holds a majority position, has received a series of new purchase orders from Eaton Corp. , Sauer-Danfoss, Inc., West Branch, IA and Sauer Danfoss Ltd, Swindon, Wilts, UK, units of Sauer-Danfoss Inc. .

The orders are for renovations and improvements of REN testing equipment already in service. The modifications include installation of REN's new control software, improved data acquisition and storage equipment, and software and expanded product testing capabilities. In announcing these orders, REN CORPORATION president, Gary A. Roberts noted that, "These orders illustrate our abilities to expand the capabilities and improve the productivity of our test machines long after initial delivery. This extends the life of our customers' investment and yields lower life cycle costs. We are continuing to expand our capacity to provide total support for the life of our assembly and test systems."

Sauer-Danfoss, Inc. is a worldwide leader in the design, manufacture and sale of engineered hydraulic systems, components and electronics for use primarily in applications of mobile equipment.

Eaton is a global $7.2 billion diversified industrial manufacturer that is a leader in fluid power systems; electrical power quality, distribution and control; automotive engine air management and fuel economy; and intelligent truck systems for fuel economy and safety.

REN CORPORATION, located in Stillwater, Oklahoma, is a twenty-two year old manufacturer of automated industrial systems, specializing in test equipment for the fluid power industry.

Rentech, Inc., incorporated in 1981, is the developer and licensor of a patented and proprietary Fischer-Tropsch gas-to-liquids process (GTL) for conversion of synthesis gas made from natural gas, industrial off-gas, or solid or liquid carbon-bearing materials into high-value fuels and chemicals. These include clean burning, ultra-low-sulfur and ultra-low-aromatic fuels (beyond detectable limits), naphtha, waxes and fuel for fuel cells.

SAFE HARBOR STATEMENT

Certain information presented herein may contain "forward-looking" statements as defined by the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Any number of important risk factors could cause actual results to differ materially from those in the forward-looking statements herein and include and are not limited to: cancellation of orders; poor economic conditions resulting in contraction of business within the heavy equipment industry; and, failure of customers to pay for orders on a timely basis. For more information concerning risk factors that could cause such a difference, see the Company's annual report on Form 10-K and quarterly reports on Form 10-Q filed with the Securities and Exchange Commission. Although Rentech believes its statements to be reasonable, investors are cautioned that such forward-looking statements involve risk and uncertainties. The Company undertakes no obligation to publicly release the result of any revisions to any such forward-looking statements that may be made to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

Industry inquiries only -- please contact: Mr. Gary A. Roberts, President, REN CORPORATION at 405-533-2700, or by E-mail at sales@rencorp.com. For general information inquiries contact: Mark Koenig, Director of Investor Relations, Rentech, Inc. at 303-298-8008, or by E-mail at mkir@rentk.com, or see the Company's web site at: www.rentechinc.com .