The former chief executive of Brazilian petrochemical company Braskem SA was arrested on Wednesday in New York on charges that he took part in a scheme to pay millions of dollars in bribes to officials to secure government contracts. Jose Carlos Grubisich was charged with conspiracy to violate a U.S. foreign corruption law and with a money laundering conspiracy in a newly unsealed indictment in federal court in Brooklyn. Grubisich was arrested Wednesday morning at New York’s John F. Kennedy Airport and entered a plea of not guilty in federal court in the afternoon, according to John Marzulli, a spokesman for the office of U.S. Attorney Richard Donoghue.