June 19, 2008

Rentech and UOP Form Alliance for Deployment of Clean Synthetic Fuels and Chemicals Technologies

Rentech, Inc. (AMEX:RTK) today announced that it has formed an alliance with UOP LLC, a Honeywell company, to jointly offer the companies' respective technologies for the commercial production of synthetic fuels, specialty waxes and chemicals.

The non-exclusive agreement aligns Rentech's proprietary process to convert synthesis gas from biomass and fossil resources into hydrocarbons with UOP's hydrocracking and hydrotreating technologies that process and upgrade hydrocarbons into ultra-clean synthetic fuels, specialty waxes and chemicals.

"This alliance between Rentech and UOP provides a one-stop solution to developers of commercial synthetic fuels facilities worldwide for synthesis gas conversion and product upgrading," said Richard Penning, Executive Vice President of Commercial Affairs for Rentech.

As commercialization partners, Rentech and UOP expect to increase their market reach and jointly offer proven technologies that can produce ultra-clean synthetic fuels, specialty waxes and chemicals that are cleaner than traditional petroleum-derived fuels and chemicals.

"As the need for increasingly cleaner fuels continues to grow, we look forward to working with Rentech to offer better solutions worldwide," said Ashis Banerji, UOP Business Director for Refining. "Together we can offer a solution that is well suited to the production of high-quality, ultra-clean transportation fuels and high-value chemicals," Mr. Banerji continued.

About Rentech, Inc.

Rentech, Inc. (www.rentechinc.com), incorporated in 1981, provides clean energy solutions. The Rentech Process is a patented and proprietary technology that converts synthesis gas from biomass and fossil resources into hydrocarbons that can be processed and upgraded into ultra-clean synthetic fuels, specialty waxes and chemicals. These energy resources include natural gas, biomass, municipal solid waste, petroleum coke and coal. Rentech Energy Midwest Corporation manufactures and sells fertilizer products including ammonia, urea ammonia nitrate, urea granule and urea solution to the corn-belt region.

Safe Harbor

This press release contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995 about matters such as the market potential for the Rentech Process and UOP's applications. These statements are based on management's current expectations and actual results may differ materially as a result of various risks and uncertainties. Other factors that could cause actual results to differ from those reflected in the forward-looking statements are set forth in the Company's press releases and periodic public filings with the Securities and Exchange Commission, which are available via Rentech's web site at www.rentechinc.com. The forward-looking statements in this press release are made as of the date of this release, and Rentech does not undertake to revise or update these forward-looking statements, except to the extent that it is required to do so under applicable law.