LOWELL -- After 60 years, UMass Lowell's Engineering Building has a name, recognizing a distinguished alumnus and benefactor whose latest gift to the university totals $1.25 million. A naming ceremony took place Thursday for Perry Hall, at the building on the university's North Campus. The building is named for Barry Perry, a 1968 UMass Lowell graduate who retired in 2006 as chairman and chief executive officer of New Jersey-based Engelhard Corp., a chemical and metals company. Perry, who grew up in Dartmouth, credited much of his success to the education he received while earning his bachelor of science degree in plastics engineering at what was then Lowell Technological Institute. Speakers included Chancellor Marty Meehan; John Ting, dean of UMass Lowell's Francis College of Engineering; and Assistant Vice Chancellor John Davis, Office of University Advancement.