April 8 (Reuters) - Private equity firm KPS Capital Partners LP said on Thursday it would buy packaging products supplier Crown Holdings Inc’s food, aerosol and promotional packaging business in Europe, Middle East and Africa for 2.25 billion euros ($2.68 billion). Crown will retain 20% ownership of the business, KPS said. ($1 = 0.8394 euros) (Reporting by Praveen Paramasivam in Bengaluru; Editing by Ramakrishnan M.)