NEW YORK--(BUSINESS WIRE)--Faruqi & Faruqi, LLP, a leading national securities firm headquartered in New York City, is investigating the Board of Directors of Rentech Nitrogen Partners, L.P. (“Rentech” or the “Company”) (NYSE:RNF) for potential breaches of fiduciary duties in connection with the sale of the Company to CVR Partners LP for approximately $533 million in cash and stock. The Company’s stockholders will only receive approximately $14.20 (1.04 units of CVR Partners and $2.57 in ca