BASF, AltaGas Sign Long-Term Butane Supply Agreement / Latest / By mark BASF Intertrade (BASF) and AltaGas (ALA) have signed a long-term agreement for butane to be produced at the Ridley Island Energy Export Facility in Canada. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Related