A Danbury company has once again made the Fortune 500 list.  Praxair is listed at 262, with $10.8 million in revenue, and $1.55 million in profits.  The industrial gas supplier operates facilities that produce and distribute products like oxygen, helium, nitrogen and hydrogen.  Praxair has made the Fortune 500 list for 22 years, its previous rank was 249.   Companies are ranked by total revenues for their respective fiscal years.  The only changes to the prior years’ data are for significant restatement due to reporting errors that require a company to file an amended 10-K.