Al Khaleej has had a long-term relationship with one of Alvean's shareholders, Copersucar, for nearly two decades.

"The relationship, now lying with Alvean, has been further strengthened with the entry of this long-term raw sugar procurement contract," Al Khaleej Managing Director Jamal Al Ghurair said in a statement.

Alvean, the world's largest sugar trader, is a joint venture formed by U.S. agricultural group Cargill and Brazil's Copersucar in 2014.

(Reporting by Nigel Hunt; editing by Jason Neely)