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NEW YORK CITY — Colliers International has arranged a long-term, 16,506-square-foot lease for the American Institute of Chemical Engineers at 120 Wall St. in New York City. The nonprofit organization, which includes more than 45,000 members in more than 90 countries, is relocating from 3 Park Ave. The 34-story Class A office tower spans 615,000 square feet. The nonprofit will occupy the entire 23rd floor, later this year.