Exhibit (d)(xxi) PARTNERSHIP INTEREST TRANSFER AGREEMENT THIS AGREEMENT is made as of the 30th day of April, 2004 BETWEEN: MDS INC., a corporation governed by the laws of Canada ("MDS")Partnership Interest Transfer Agreement • April 30th, 2004 • Hemosol Inc • Biological products, (no disgnostic substances) • Ontario
PARTNERSHIP INTEREST TRANSFER AGREEMENTPartnership Interest Transfer Agreement • August 18th, 2006 • Lyondell Chemical Co • Industrial organic chemicals • Delaware
THIS PARTNERSHIP INTEREST TRANSFER AGREEMENT (this “Agreement”) is made and entered into as of July 31, 2006, by and among CITGO REFINING INVESTMENT COMPANY, an Oklahoma corporation (“CITGO LP”), CITGO GULF COAST REFINING, INC., a Delaware corporation (“CITGO GP” and, together with CITGO LP, the “Assignors”), LYONDELL HOUSTON REFINERY A INC., a Delaware corporation (“Newco A”), LYONDELL HOUSTON REFINERY INC., a Delaware corporation (“Newco LP” and, together with Newco A, the “Assignees”), LYONDELL REFINING PARTNERS LP, a Delaware limited partnership (“Lyondell LP”), and LYONDELL REFINING COMPANY LP, a Delaware limited partnership (“Lyondell GP” and, together with Lyondell LP, the “Lyondell Partners”).
